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Biochar composites with nano zerovalent iron and eggshell powder for nitrate removal from aqueous solution with coexisting chloride ions.
Environ Sci Pollut Res Int. 2018 Sep; 25(26):25757-25771.ES

Abstract

Biochar (BC) was produced from date palm tree leaves and its composites were prepared with nano zerovalent iron (nZVI-BC) and hen eggshell powder (EP-BC). The produced BC and its composites were characterized by SEM, XRD, BET, and FTIR for surface structural, mineralogical, and chemical groups and tested for their efficiency for nitrate removal from aqueous solutions in the presence and absence of chloride ions. The incidence of graphene and nano zerovalent iron (Fe0) in the nZVI-BC composite was confirmed by XRD. The nZVI-BC composite possessed highest surface area (220.92 m2 g-1), carbon (80.55%), nitrogen (3.78%), and hydrogen (11.09%) contents compared to other materials. Nitrate sorption data was fitted well to the Langmuir (R 2 = 0.93-0.98) and Freundlich (R 2 = 0.90-0.99) isotherms. The sorption kinetics was adequately explained by the pseudo-second-order, power function, and Elovich models. The nZVI-BC composite showed highest Langmuir predicted sorption capacity (148.10 mg g-1) followed by EP-BC composite (72.77 mg g-1). In addition to the high surface area, the higher nitrate removal capacity of nZVI-BC composite could be attributed to the combination of two processes, i.e., chemisorption (outer-sphere complexation) and reduction of nitrate to ammonia or nitrogen by Fe0. The appearance of Fe-O stretching and N-H bonds in post-sorption FTIR spectra of nZVI-BC composite suggested the occurrence of redox reaction and formation of Fe compound with N, such as ferric nitrate (Fe(NO3)3·9H2O). Coexistence of chloride ions negatively influenced the nitrate sorption. The decrease in nitrate sorption with increasing chloride ion concentration was observed, which could be due to the competition of free active sites on the sorbents between nitrate and chloride ions. The nZVI-BC composite exhibited higher nitrate removal efficiency compared to other materials even in the presence of highest concentration (100 mg L-1) of coexisting chloride ion.

Authors+Show Affiliations

Soil Sciences Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Kingdom of Saudi Arabia.Soil Sciences Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Kingdom of Saudi Arabia. Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.Soil Sciences Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Kingdom of Saudi Arabia. Department of Soils and Water, Faculty of Agriculture, Assiut University, Assiut, 71526, Egypt.Soil Sciences Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Kingdom of Saudi Arabia.Industrial Psychology, College of Education, King Saud University, Riyadh, Saudi Arabia.Soil Sciences Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Kingdom of Saudi Arabia. malwabel@ksu.edu.sa.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28921403

Citation

Ahmad, Munir, et al. "Biochar Composites With Nano Zerovalent Iron and Eggshell Powder for Nitrate Removal From Aqueous Solution With Coexisting Chloride Ions." Environmental Science and Pollution Research International, vol. 25, no. 26, 2018, pp. 25757-25771.
Ahmad M, Ahmad M, Usman ARA, et al. Biochar composites with nano zerovalent iron and eggshell powder for nitrate removal from aqueous solution with coexisting chloride ions. Environ Sci Pollut Res Int. 2018;25(26):25757-25771.
Ahmad, M., Ahmad, M., Usman, A. R. A., Al-Faraj, A. S., Abduljabbar, A. S., & Al-Wabel, M. I. (2018). Biochar composites with nano zerovalent iron and eggshell powder for nitrate removal from aqueous solution with coexisting chloride ions. Environmental Science and Pollution Research International, 25(26), 25757-25771. https://doi.org/10.1007/s11356-017-0125-9
Ahmad M, et al. Biochar Composites With Nano Zerovalent Iron and Eggshell Powder for Nitrate Removal From Aqueous Solution With Coexisting Chloride Ions. Environ Sci Pollut Res Int. 2018;25(26):25757-25771. PubMed PMID: 28921403.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biochar composites with nano zerovalent iron and eggshell powder for nitrate removal from aqueous solution with coexisting chloride ions. AU - Ahmad,Munir, AU - Ahmad,Mahtab, AU - Usman,Adel R A, AU - Al-Faraj,Abdullah S, AU - Abduljabbar,Adel S, AU - Al-Wabel,Mohammad I, Y1 - 2017/09/18/ PY - 2016/12/29/received PY - 2017/09/05/accepted PY - 2017/9/19/pubmed PY - 2019/1/2/medline PY - 2017/9/19/entrez KW - Chemisorption KW - Isotherm sorption KW - Kinetic sorption KW - Nano zerovalent iron KW - Nitrate reduction SP - 25757 EP - 25771 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 25 IS - 26 N2 - Biochar (BC) was produced from date palm tree leaves and its composites were prepared with nano zerovalent iron (nZVI-BC) and hen eggshell powder (EP-BC). The produced BC and its composites were characterized by SEM, XRD, BET, and FTIR for surface structural, mineralogical, and chemical groups and tested for their efficiency for nitrate removal from aqueous solutions in the presence and absence of chloride ions. The incidence of graphene and nano zerovalent iron (Fe0) in the nZVI-BC composite was confirmed by XRD. The nZVI-BC composite possessed highest surface area (220.92 m2 g-1), carbon (80.55%), nitrogen (3.78%), and hydrogen (11.09%) contents compared to other materials. Nitrate sorption data was fitted well to the Langmuir (R 2 = 0.93-0.98) and Freundlich (R 2 = 0.90-0.99) isotherms. The sorption kinetics was adequately explained by the pseudo-second-order, power function, and Elovich models. The nZVI-BC composite showed highest Langmuir predicted sorption capacity (148.10 mg g-1) followed by EP-BC composite (72.77 mg g-1). In addition to the high surface area, the higher nitrate removal capacity of nZVI-BC composite could be attributed to the combination of two processes, i.e., chemisorption (outer-sphere complexation) and reduction of nitrate to ammonia or nitrogen by Fe0. The appearance of Fe-O stretching and N-H bonds in post-sorption FTIR spectra of nZVI-BC composite suggested the occurrence of redox reaction and formation of Fe compound with N, such as ferric nitrate (Fe(NO3)3·9H2O). Coexistence of chloride ions negatively influenced the nitrate sorption. The decrease in nitrate sorption with increasing chloride ion concentration was observed, which could be due to the competition of free active sites on the sorbents between nitrate and chloride ions. The nZVI-BC composite exhibited higher nitrate removal efficiency compared to other materials even in the presence of highest concentration (100 mg L-1) of coexisting chloride ion. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/28921403/Biochar_composites_with_nano_zerovalent_iron_and_eggshell_powder_for_nitrate_removal_from_aqueous_solution_with_coexisting_chloride_ions_ L2 - https://dx.doi.org/10.1007/s11356-017-0125-9 DB - PRIME DP - Unbound Medicine ER -