Dr. Maria Harja
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Dr. Maria Harja

Professor
Department of Chemical Engineering, Gheorghe Asachi Technical University of Iasi, Romania

Highest Degree
Ph.D. in Chemistry from Gheorghe Asachi Technical University of Iasi, Romania

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Area of Interest:

Environmental Sciences
100%
Chemical Engineering
62%
Wastewater
90%
Material Engineerinng
75%
Heavy Metals
55%

Research Publications in Numbers

Books
13
Chapters
5
Articles
118
Abstracts
16

Selected Publications

  1. Harja, M., R.C. Ciocinta, G. Ondrasek, D. Bucur and M. Dirja, 2023. Accumulation of heavy metal ions from urban soil in spontaneous flora. Water, Vol. 15. 10.3390/w15040768.
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  2. Apostolescu, N., R.E.T. Farmus, M. Harja, M.A. Vizitiu, C. Cernatescu, C. Cobzaru and G.A. Apostolescu, 2023. Photocatalytic removal of antibiotics from wastewater using the CeO2/ZnO heterojunction. Materials, Vol. 16. 10.3390/ma16020850.
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  3. Vinceković, M., S. Šegota, S. Jurić, M. Harja and G. Ondrasek, 2022. Development and characterization of a novel soil amendment based on biomass fly ash encapsulated in calcium alginate microspheres. Int. J. Mol. Sci., Vol. 23. 10.3390/ijms23179984.
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  4. Rusu, L., C.G. Grigoraș, A.I. Simion, E.M. Suceveanu, B. Istrate and M. Harja, 2022. Biosorption potential of microbial and residual biomass of Saccharomyces pastorianus immobilized in calcium alginate matrix for pharmaceuticals removal from aqueous solutions. Polymers, Vol. 14. 10.3390/polym14142855.
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  5. Rusu, L., C.G. Grigoraș, A.I. Simion, E.M. Suceveanu, A.V.D. Botezatu and M. Harja, 2022. Biosorptive removal of ethacridine lactate from aqueous solutions by Saccharomyces pastorianus residual biomass/calcium alginate composite beads: Fixed-bed column study. Materials, Vol. 15. 10.3390/ma15134657.
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  6. Rusu, L., C.G. Grigoraș, A.I. Simion, E.M. Suceveanu, A.C. Blaga and M. Harja, 2022. Encapsulation of Saccharomyces pastorianus residual biomass in calcium alginate matrix with insights in ethacridine lactate biosorption. Polymers, Vol. 14. 10.3390/polym14010170.
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  7. Lutic, D., A.M. Sescu, S. Siamer, M. Harja and L. Favier, 2022. Excellent ambient oxidation and mineralization of an emerging water pollutant using Pd-doped TiO2 photocatalyst and UV-A irradiation. C. R. Chim., 25: 203-215.
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  8. Harja, M., O. Gencel, A. Sarı, M. Sutcu, E. Erdogmus and G. Hekimoglu, 2022. Production and characterization of natural clay-free green building brick materials using water treatment sludge and oak wood ash. Arch. Civ. Mech. Eng., Vol. 22. 10.1007/s43452-022-00400-0.
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  9. Harja, M., N. Lupu, H. Chiriac, D.D. Herea and G. Buema, 2022. Studies on the removal of congo red dye by an adsorbent based on fly-ash@Fe3O4 mixture. Magnetochemistry, Vol. 8. 10.3390/magnetochemistry8100125.
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  10. Harja, M., G. Buema and D. Bucur, 2022. Recent advances in removal of congo red dye by adsorption using an industrial waste. Sci. Rep., Vol. 12. 10.1038/s41598-022-10093-3.
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  11. Harja, M., C. Teodosiu, D.N. Isopescu, O. Gencel, D. Lutic, G. Ciobanu and I. Cretescu, 2022. Using fly ash wastes for the development of new building materials with improved compressive strength. Materials, Vol. 15. 10.3390/ma15020644.
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  12. Gencel, O., M. Harja, A. Sarı, G. Hekimoğlu and A. Ustaoğlu et al., 2022. Development, characterization, and performance analysis of shape-stabilized phase change material included-geopolymer for passive thermal management of buildings. Int. J. Energy Res., 46: 21841-21855.
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  13. Favier, L., A.I. Simion, R.M. Hlihor, I.F. Kertész, M. Molnár, M. Harja and C. Vial, 2022. Intensification of the photodegradation efficiency of an emergent water pollutant through process conditions optimization by means of response surface methodology. J. Environ. Manage., 10.1016/j.jenvman.2022.116928.
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  14. Duduman, C.N., C.G. de Castro, G.A. Apostolescu, G. Ciobanu, D. Lutic, L. Favier and M. Harja, 2022. Enhancing the TiO2-Ag photocatalytic efficiency by acetone in the dye removal from wastewater. Water, Vol. 14. 10.3390/w14172711.
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  15. Harja, M., R. Tataru-Farmus, E.D. Hultuana, C.G. de Castro, G. Ciobanu and L. Lazar, 2021. Influence of ethylenediamine content over performance of CO2 absorption into potassium carbonate solutions. Environ. Eng. Manage. J., 20: 507-516.
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  16. Erdogmus, E., M. Harja, O. Gencel, M. Sutcu and A. Yaras, 2021. New construction materials synthesized from water treatment sludge and fired clay brick wastes. J. Build. Eng., Vol. 42. 10.1016/j.jobe.2021.102471.
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  17. Buema, G., N. Lupu, H. Chiriac, G. Ciobanu and R.D. Bucur et al., 2021. Performance assessment of five adsorbents based on fly ash for removal of cadmium ions. J. Mol. Liq., Vol. 333. 10.1016/j.molliq.2021.115932.
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  18. Buema, G., M. Harja, N. Lupu, H. Chiriac and L. Forminte et al., 2021. Adsorption performance of modified fly ash for copper ion removal from aqueous solution. Water, 10.3390/w13020207.
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  19. Buema, G., L.M. Trifas and M. Harja, 2021. Removal of toxic copper ion from aqueous media by adsorption on fly ash-derived zeolites: kinetic and equilibrium studies. Polymers, Vol. 13. 10.3390/polym13203468.
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  20. Buema, G., G. Lisa, O. Kotova, G. Ciobanu, L. Ivaniciuc, L. Favier and M. Harja, 2021. Application of thermal analysis to improve the preparation conditions of zeolitic materials from flying ash. Environ. Eng. Manage. J., 20: 377-388.
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  21. Buema, G., A.I. Borhan, D.D. Herea, G. Stoian and H. Chiriac et al., 2021. Magnetic solid-phase extraction of cadmium ions by hybrid self-assembled multicore type nanobeads. Polymers, 10.3390/polym13020229.
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  22. Shushkov, D.A., O.B. Kotova, J.E.F.M. Ibrahim, M. Harja, L.A. Gu00f6mze, T.N. Shchemelinina and G.V. Ignatiev, 2020. Analcime-bearing rocks as advanced sorbents. Epitoanyag - J. Silic. Based Compos. Mater., 72: 156-164.
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  23. Sescu, A.M., M. Harja, L. Favier, L.O. Berthou, C.G. de Castro, A. Pui and D. Lutic, 2020. Zn/la mixed oxides prepared by coprecipitation: synthesis, characterization and photocatalytic studies. Materials, 10.3390/ma13214916.
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  24. Sescu, A.M., L. Favier, D. Lutic, N. Soto-Donoso, G. Ciobanu and M. Harja, 2020. TiO2 doped with noble metals as an efficient solution for the photodegradation of hazardous organic water pollutants at ambient conditions. Water, Vol. 13. 10.3390/w13010019.
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  25. Harja, M., G. Buema, N. Lupu, H. Chiriac, D.D. Herea and G. Ciobanu, 2020. Fly ash coated with magnetic materials: improved adsorbent for cu (ii) removal from wastewater. Materials, 10.3390/ma14010063.
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  26. Harja, M. and G. Ciobanu, 2020. Eco-friendly Nano-adsorbents for Pollutant Removal from Wastewaters. In: andbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, Kharissova O., L. Martínez and B. Kharisov (Eds), Springer International Publishing Singapore 22.
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  27. Fortunu0103, M.E., A. Lobiuc, L.M. Cosovanu and M. Harja, 2020. Effects of in-situ filler loading vs. conventional filler and the use of retention-related additives on properties of paper. Materials, 10.3390/ma13225066.
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  28. Favier, L. and M. Harja, 2020. TiO2/Fly ash nanocomposite for photodegradation of organic pollutant. In: Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, Kharissova, O.V., L.M.T. Martínez and B.I. Kharisov, Springer International Publishing, Cham, pp: 1-24.
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  29. Buema, G., N. Lupu, H. Chiriac, T. Roman, M. Porcescu, G. Ciobanu, D.V. Burghila and M. Harja, 2020. Eco-friendly materials obtained by fly ash sulphuric activation for cadmium ions removal. Mat., 10.3390/ma13163584.
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  30. Anuforo, P.C., , A.C.C. Egbuonu and E.U. Egu, 2020. Terminalia catappa flour extract mitigated monosodium glutamate intoxicated ratsu2019 kidney biofunction and histology. J. Phytopharmacol., 9: 164-168.
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  31. , A.C.C., E.M. Chuk, W. Chibuzor, E. Obi, N.R. Ez, C.U. Si and J. Utodinachi, 2020. Artemether-lumefantrine improved superoxide dismutase co-regulation related antioxidant defense in monosodium glutamate-induced oxidative stress in rats. Asian J. Biochem., 15: 42-49.
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  32. Shchemelinina, T., O. Kotova, M. Harja and E. Anchugova, 2019. Biogeosorbents for solving ecological problems. IOP Conf. Ser.: Mater. Sci. Eng., 10.1088/1757-899X/613/1/012042.
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  33. Litu, L., G. Ciobanu, S.M. Cimpeanu, O. Kotova, R. Ciocinta, D. Bucur and M. Harja, 2019. Comparative study between flocculation-coagulation processes in raw/wastewater treatment. AgroLife Scient. J., 85: 139-145.
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  34. Iftode, V.I., I. Olteanu-Dontov, P. Mihai, M. Budescu and M. Harja, 2019. Improving elastic properties of bricks by polyurethane matrices mean. IOP Conf. Ser.: Mater. Sci. Eng., 10.1088/1757-899X/586/1/012009.
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  35. Harja, M., G. Ciobanu, T. Juzsakova and I. Cretescu, 2019. New approaches in modeling and simulation of CO2 absorption reactor by activated potassium carbonate solution. Processes, Vol. 7. 10.3390/pr7020078.
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  36. De Castro, C.G., C.N. Duduman, M. Harja, D. Lutic, T. Juzsakova and I. Cretescu, 2019. New TiO2-Ag nanoparticles used for organic compound degradation. Environ. Eng. Manage. J., 18: 1755-1763.
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  37. Ciobanu, G. and M. Harja, 2019. Cerium-doped hydroxyapatite/collagen coatings on titanium for bone implants. Ceramic Int., 45: 2852-2857.
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  38. Ciobanu, G. and M. Harja, 2019. Bismuth-doped Nanohydroxyapatite coatings on Titanium implants for improved radiopacity and antimicrobial activity. Nanomaterials, 10.3390/nano9121696.
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  39. Ciobanu and Harja, 2019. Bismuth-doped nanohydroxyapatite coatings on titanium implants for improved radiopacity and antimicrobial activity. Nanomat., 10.3390/nano9121696.
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  40. Harja, M., G. Ciobanu, L. Rusu and L. Lazar, 2018. The enhancement factor approach for chemosorption process. Environ. Eng. Manage. J., 17: 813-820.
  41. Harja, M. and G. Ciobanu, 2018. Studies on adsorption of oxytetracycline from aqueous solutions onto hydroxyapatite. Sci. Total Environ., 628-629: 36-43.
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  42. Duduman, C.N., J.M.G. de Salazar y Caso de Los Cobos, M. Harja, M.I. Barrena Pérez and C.G. de Castro et al., 2018. Preparation and characterization of nanocomposite material based on Tio2-ag for environmental applications. Environ. Eng. Manage. J., 17: 925-936.
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  43. Cretescu I., M. Harja, C. Teodosiu, D.N. Isopescu and M.F. Chok et al., 2018. Synthesis and characterisation of a binder cement replacement based on alkali activation of fly ash waste. Process Saf. Environ. Prot., 119: 23-35.
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  44. Ciobanu, G. and M. Harja, 2018. Studies on the sorption of levofloxacin from aqueous solutions onto nanohydroxyapatite. Revue Roumaine de Chimie, 63: 593-601.
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  45. Shchemelinina, T.N., O.B. Kotova, M. Harja, E.M. Anchugova, Y. Pelovski and I. Cretescu, 2017. New trends in the mechanisms of increasing productivity of mineral-based materials. Vestnik IG Komi SC UB RAS, 6: 40-42.
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  46. Kotova, O.B., M. Harja, I. Cretescu, F. Noli, Y. Pelovski and D.A. Shushkov, 2017. Zeolites in technologies of pollution prevention and remediation of aquatic systems. Vestnik IG Komi SC UB RAS, 5: 49-53.
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  47. Ciobanu, G., M. Harja and L. Rusu, 2017. Biomimetic hydroxyapatite-silver coatings on titanium surfaces. Revue Roumaine de Chimie, 62: 449-454.
  48. Rusu, L., M. Harja, D. Suteu and A. Dabija, 2016. Pesticide residues contamination of milk and dairy products. A case study: Bacau district area, Romania. J. Environ. Protect. Ecol., 17: 1229-1241.
  49. Noli, F., M. Kapnisti, M. Harja and G. Buema, 2016. Retention of barium and europium radionuclides from aqueous solutions on ash-based sorbents by application of radiochemical techniques. Applied Radiation Isotopes, 116: 102-109.
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  50. Noli, F., G. Buema, P. Misaelides and M. Harja, 2016. Retention of cesium from aqueous solutions using synthetic zeolites produced from power plant ash. J. Radioanal. Nucl. Chem., 309: 589-596.
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  51. Nacu, G., D. Bulgariu, M.C. Popescu, M. Harja, D.T. Juravle and L. Bulgariu, 2016. Removal of Zn(II) ions from aqueous media on thermal activated sawdust. Desalin. Water Treat., 57: 21904-21915.
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  52. Harja, M., S.M. Cimpeanu, M. Dirja and D. Bucur, 2016. Synthesis of Zeolite from Fly Ash and their Use as Soil Amendment. In: Zeolites: Useful Minerals, Belviso, C. (Ed.). BoD–Books on Demand, USA, ISBN: 9789535125761, pp: 43-66.
  53. Favier, L., M. Harja, A.I. Simion, Y. Kadmi, M.L. Pacala, L. Rusu and A. Bouzaza, 2016. Advanced oxidation process for the removal of chlorinated phenols in aqueous suspensions. J. Environ. Protect. Ecol., 17: 1132-1141.
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  54. Ciobanu, G., S. Barna and M. Harja, 2016. Kinetic and equilibrium studies on adsorption of Reactive Blue 19 dye from aqueous solutions by nanohydroxyapatite adsorbent. Arch. Environ. Protect., 309: 589-596.
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  55. Noli, F., G. Buema, P. Misaelides and M. Harja, 2015. New materials synthesized from ash under moderate conditions for removal of toxic and radioactive metals. J. Radioanalytical Nuclear Chem., 303: 2303-2311.
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  56. Kadmi, Y., L. Favier, M. Harja, A.I. Simion, L. Rusu and D. Wolbert, 2015. A new strategy for pentachlorophenol monitoring in water using ultra-high-performance liquid chromatography-tandem mass spectrometry. Environ. Eng. Manage. J., 14: 567-574.
  57. Harja, M., G. Buema, L. Bulgariu, D. Bulgariu, D.M. Sutiman and G. Ciobanu, 2015. Comparative study for removal of cadmium (II) onto low cost adsorbents. Korean J. Chem. Eng., 32: 1804-1811.
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  58. Cretescu, I., G. Soreanu and M. Harja, 2015. A low-cost sorbent for removal of copper ions from wastewaters based on sawdust/fly ash mixture. Int. J. Environ. Sci. Technol., 12: 1799-1810.
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  59. Ciobanu, G., M. Harja and O. Ciobanu, 2015. Use of the information concerning the products manufacturing in innovative learning and education programme for health care sector. Applied Mech. Mater., 809/810: 1547-1552.
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  60. Rusu, L., M. Harja, C. Munteanu and G. Ciobanu, 2014. Red and brown peat use in removing pollutants from municipal and industrial wastewater. J. Environ. Prot. Ecol., 15: 1690-1699.
  61. Curteanu, S., G. Buema, C.G. Piuleac, D.M. Sutiman and M. Harja, 2014. Neuro-evolutionary optimization methodology applied to the synthesis process of ash based adsorbents. J. Ind. Eng. Chem., 20: 597-604.
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  62. Ciobanu, G., M. Harja, M. Diaconu, C. Cimpeanu, R. Teodorescu and D. Bucur, 2014. Crystal violet dye removal from aqueous solution by nanohydroxyapatite. J. Food Agric. Environ., 12: 499-502.
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  63. Ciobanu, G., M. Harja and O. Ciobanu, 2014. An overview on assistive technology training courses for salespersons. Applied Mech. Mater., 659: 585-588.
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  64. Buema, G., F. Noli, P. Misaelides, D.M. Sutiman, I. Cretescu and M. Harja, 2014. Uranium removal from aqueous solutions by raw and modified thermal power plant ash. J. Radioanal. Nuclear Chem., 299: 381-386.
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  65. Savic, R., L. Maksimovic, S. Cimpeanu, D. Bucur and G. Ondrasek et al., 2013. Hazardous and harmful substances in sediments of the Jegricka stream. J. Food Agric. Environ., 11: 1152-1156.
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  66. Harja, M., G. Buema, D.M. Sutiman and I. Cretescu, 2013. Removal of heavy metal ions from aqueous solutions using low-cost sorbents obtained from ash. Chem. Pap., 67: 497-508.
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  67. Harja, M., A. Szep, L. Lazar and N. Apostolescu, 2013. Engineering of Inorganic Products: Inorganic Salts. Editura Ecozone, Iasi, Romania, ISBN: 978-973-7645-93-7, Pages: 209.
  68. Harja, M. and M. Barbuta, 2013. Influence of different additions on frost-thaw and chemical resistance of polymer concrete. Adv. Sci. Lett., 19: 455-459.
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  69. Harja, M. and A. Szep, 2013. Solid-Fluid Necatalitic Process. Editura Ecozone, Iasi, Romania, ISBN: 978-973-7645-95-1, Pages: 269.
  70. Fortuna, M.E., M. Harja, D. Bucur and S.M. Cimpeanu, 2013. Obtaining and utilizing cellulose fibers with in-situ loading as an additive for printing paper. Materials, 6: 4532-4544.
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  71. Diaconescu, R.M., M. Barbuta and M. Harja, 2013. Prediction of properties of polymer concrete composite with tire rubber using neural networks. Mater. Sci. Eng.: B, 178: 1259-1267.
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  72. Cretescu, I., A. Savin, M. Cimpeanu, D. Bucur and M. Harja, 2013. Optimization of wine decolorization by microfiltration on polyurethane membranes. J. Food Agric. Environ., 11: 221-226.
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  73. Ciocinta, R.C., M. Harja, D. Bucur and G. Buema, 2013. Optimization of the conditions for conversion of coal ash into zeolite material. J. Food Agric. Environ., 11: 1108-1112.
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  74. Ciobanu, G., S. Ilisei, M. Harja and C. Luca, 2013. Removal of reactive blue 204 dye from aqueous solutions by adsorption onto nanohydroxyapatite. Sci. Adv. Mater., 5: 1090-1096.
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  75. Buema, G., S.M. Cimpeanu, D. Sutiman, R.D. Bucur and L. Rusu et al., 2013. Lead removal from aqueous solution by bottom ash. J. Food Agric. Environ., 11: 1137-1141.
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  76. Barbuta, M., I.O. Toma, M. Harja, A.M. Toma and C. Gavriloaia, 2013. Behaviour of short polymer-high strength concrete columns under eccentric compression. Arch. Civil Mech. Eng., 13: 119-127.
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  77. Petrovic, S., M. Dimitrijevic, S.M. Cimpeanu, D. Bucur and A. Gurita et al., 2012. Spike yield stability in wheat grown under stress conditions of alkaline soil. J. Food. Agricul. Environ., 10: 480-484.
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  78. Harja, M., L. Rusu, D. Bucur and R.C. Ciocinta, 2012. Fly ash-derived zeolites as adsorbents for Ni removal from wastewater. Revue Romaine Chimie, 57: 587-597.
  79. Harja, M., G. Buema, D.M. Sutiman, C. Munteanu and D. Bucur, 2012. Low cost adsorbents obtained from ash for copper removal. Korean J. Chem. Eng., 29: 1735-1744.
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  80. Harja, M., D. Bucur, S.M. Cimpeanu, A.A. Gurita and R.C. Ciocinta, 2012. Conversion of ash on zeolites for soil application. J. Food. Agricul. Environ., 10: 1056-1059.
  81. Harja, M., C. Cimpeanu and R.D. Bucur, 2012. The influence of hydrodinamic conditions on the synthesis of ultra-thin calcium carbonate.. J. Food. Agricult. Environ., 10: 1191-1195.
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  82. Harja, M. and R.E. Tataru Farmus, 2012. Modeling and Design of Chemical Reactors. Performantica, Iasi, Romania, Pages: 126.
  83. Harja, M. and M. Barbuta, 2012. Pollutants from Power Plants and its Effect. In: Current Topics, Concepts and Research Priorities in Environmental Chemistry, Zaharia, C. (Ed.). Vol. 2, Chapter 3, Editura Universitatii Alexandru Ioan Cuza, Iasi, Romania, ISBN-13: 9789737037978, pp: 45-59.
  84. Ciocinta, R.C., M. Harja, D. Bucur, L. Rusu and M. Barbuta, 2012. Improving soil quality by adding modified ash. Env. Eng. Manag. J., 11: 297-305.
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  85. Bucur, R., M. Harja, 2012. Homogeneous areas delimitation by considering the energy demand for plants growing in covered spaces. Env. Eng. Manag. J., 11: 253-257.
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  86. Barbuta, M. and M. Harja, 2012. Environmental Changes Caused by the Building Materials Industry. In: Current Topics, Concepts and Research Priorities in Environmental Chemistry, Zaharia, C. (Ed.). Vol. 1, Chapter 5, Editura Universitatii Alexandru Ioan Cuza, Iasi, Romania, ISBN-13: 9789737037978, pp: 109-124.
  87. Barbuţa, M., R.M. Diaconescu and M. Harja, 2012. Using neural networks for prediction of properties of polymer concrete with fly ash. J. Mat. Civ. Engin., 24: 523-528.
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  88. Harja, M., M. Barbuta, L. Rusu, C. Munteanu and G. Buema et al., 2011. Simultaneous removal of Astrazone blue and lead onto low cost adsorbents based on power plant ash. Environ. Eng. Manage. J., 10: 341-347.
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  89. Harja, M., D. Bucur, L. Rusu, M. Barbuta and R.C. Ciocinta, 2011. Corneliu munteanu, ash modified for improvement soil quality. Proceedings of the International Conference Environmental Engineering and Management-Green Future, September 1-4, 2011, Hungar. -.
  90. Barbuta, M., M. Harja, I. Cretescu and G. Soreanu, 2011. Influence of wastes content on properties of polymer concrete. Proceedings of the 7th International Symposium on Cement Based Materials for a Sustainable Agriculture, September 18-21, 2011, Canada -.
  91. Harja, M., R.C. Ciocinta, M. Barbuta, L. Rusu and A.I. Simion, 2010. CaCO3 controllable synthesis by double exchange method using CaCl2 residual solutions. Environ. Eng. Manage. J., 9: 1571-1577.
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  92. Harja, M. and R.C. Ciocinta, 2010. Synthesis and Characterization of Calcium Carbonate Used as Filler in Paper Industry. Performantica, Iasi, Romania, ISBN: 978-973-730-783-5, Pages: 175.
  93. Barbuta, M., M. Harja and I. Baran, 2010. Comparison of mechanical properties for polymer concrete with different types of filler. J. Mat. Civ. Engin., 22: 696-701.
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  94. Barbuta, M., M. Harja and D. Babor, 2010. Concrete polymer with fly ash. Morphologic analysis based on scanning electron microscopic observations. Rev. Romana. Mat., 40: 337-345.
  95. Harja, M., R.C. Ciocinta, I. Creţescu, M. Apostolescu and M. Barbuta, 2009. Crystal growth of calcium carbonate with various morphologies from residual calcium chloride solution. Rev. Chim., 60: 1025-1031.
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  96. Harja, M., M. Barbuta and M. Gavrilescu, 2009. Study of morphology for geopolymer materials obtained from fly ash. Environ. Eng. Manage. J., 8: 1021-1027.
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  97. Harja, M., M. Barbuta and L. Rusu, 2009. Obtaining and characterization of the polymer concrete with fly ash. J. Applied Sci., 9: 88-96.
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  98. Harja, M., M. Barbuţa and M. Gavrilescu, 2009. Utilization of coal fly ash from power plants II. Geopolymer obtaining. Environ. Eng. Manage. J., 8: 513-520.
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  99. Harja, M., I. Cretescu, L. Rusu and R.C. Ciocinta, 2009. The influence of experimental factors of calcium carbonate morphology prepared by carbonation. Rev. Chim., 60: 1258-1263.
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  100. Barbuta, M., N. Taranu and M. Harja, 2009. Wastes used in obtaining polymer composite. Env. Eng. Manag. J., 8: 1145-1150.
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  101. Barbuta, M., C. Gavriloaie and M. Harja, 2009. Elements From Polymeric Concrete. Politehnium, Iaşi, ISBN: 978-973-621-267-3, Pages: 120.
  102. Barbuta, M. and M. Harja, 2009. Polymer Concrete. Politehnium, Iaşi, ISBN: 978-973-621-268-0, Pages: 186.
  103. Harja, M., M. Barbuta, L. Rusu and N. Apostolescu, 2008. Utilization of coal fly ash from power plants I. Ash characterization. Environ. Eng. Manage. J., 7: 289-294.
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  104. Rusu, L. and M. Harja, 2007. Chemical and Biochemical Processes, I. Chemical Processes. PIM, Iaşi, ISBN: 978-973-716-744-6, Pages: 321.
  105. Al., S. and M. Harja, 2007. Studiul absorbţiei dioxidului de sulf in suspensii de carbonat de calciu rezidual. REV. CHIM., 10: 870-874.
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  106. Petrescu, S.T. and M. Harja, 2006. Chemical Reactor for Eterogen Systems. Venus Publishing House, New Delhi, ISBN: 978-973-756-044-5, Pages: 294.
  107. Harja, M. and I. Balasanian, 2006. Chemical Thermoenergetic. Ecozone Publishing House, Iasi, ISBN 973-7645-29-4, Pages: 269.
  108. Ciobanu, M.G., L.D. Ghenghea, G. Carja and M. Harja, 2006. Advanced Materials-SAPO-n Crystalline Microporous Zeolites. CERMI Publishing House, Iasi, ISBN: 13-978-973-667-192-0. Pages: 220.
  109. Istrati, L. and M. Harja, 2005. Biotechology in Environment. Technica-Info Chisinau Publishing, Republica Moldova, ISBN: 9975-63-147-7, Pages: 265.
  110. Harja, M. and M.G. Ciobanu, 2004. Inorganic Composite Materials. Matrix Rom Publishing House, Bucharest,ISBN: 973-685-701-8, Pages: 194.
  111. Harja., M., L. Istrati and R. Smocot, 2003. Technology of Inorganic Binder. CERMI Scientific Technique and Didactic Publishing House, Iasi, ISBN: 973-667-004-x, Pages: 280.