Tags

Type your tag names separated by a space and hit enter

Performance of nanoscale zero-valent iron in nitrate reduction from water using a laboratory-scale continuous-flow system.
Chemosphere. 2018 Apr; 197:502-512.C

Abstract

Nanoscale zero-valent iron (nZVI) is a versatile treatment reagent that should be utilized in an effective application for nitrate remediation in water. For this purpose, a laboratory-scale continuous-flow system (LSCFS) was developed to evaluate nZVI performance in removal of nitrate in different contaminated-water bodies. The equipment design (reactor, settler, and polisher) and operational parameters of the LSCFS were determined based on nZVI characterization and nitrate reduction kinetics. Ten experimental runs were conducted at different dosages (6, 10 and 20 g) of nZVI-based reagents (nZVI, bimetallic nZVI-Cu, CuCl2-added nZVI). Effluent concentrations of nitrogen and iron compounds were measured, and pH and ORP values were monitored. The major role exhibited by the recirculation process of unreacted nZVI from the settler to the reactor succeeded in achieving overall nitrate removal efficiency (RE) of >90%. The similar performance of both nZVI and copper-ions-modified nZVI in contaminated distilled water was an indication of LSCFS reliability in completely utilizing iron nanoparticles. In case of treating contaminated river water and simulated groundwater, the nitrate reduction process was sensitive towards the presence of interfering substances that dropped the overall RE drastically. However, the addition of copper ions during the treatment counteracted the retardation effect and greatly enhanced the nitrate RE.

Authors+Show Affiliations

Department of Earth System Science and Technology, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen Kasuga, Fukuoka 816-8580, Japan; Department of Chemical Engineering, Faculty of Engineering, Cairo University, Giza 12613, Egypt. Electronic address: khalil.mohamed.elsayed.ahmed.aly.ahmed.305@m.kyushu-u.ac.jp.Department of Earth System Science and Technology, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen Kasuga, Fukuoka 816-8580, Japan. Electronic address: osama-eljamal@kyudai.jp.International Institute for Carbon-Neutral Energy Research (WPI-I(2)CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.Department of Earth System Science and Technology, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen Kasuga, Fukuoka 816-8580, Japan.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29407812

Citation

Khalil, Ahmed M E., et al. "Performance of Nanoscale Zero-valent Iron in Nitrate Reduction From Water Using a Laboratory-scale Continuous-flow System." Chemosphere, vol. 197, 2018, pp. 502-512.
Khalil AME, Eljamal O, Saha BB, et al. Performance of nanoscale zero-valent iron in nitrate reduction from water using a laboratory-scale continuous-flow system. Chemosphere. 2018;197:502-512.
Khalil, A. M. E., Eljamal, O., Saha, B. B., & Matsunaga, N. (2018). Performance of nanoscale zero-valent iron in nitrate reduction from water using a laboratory-scale continuous-flow system. Chemosphere, 197, 502-512. https://doi.org/10.1016/j.chemosphere.2018.01.084
Khalil AME, et al. Performance of Nanoscale Zero-valent Iron in Nitrate Reduction From Water Using a Laboratory-scale Continuous-flow System. Chemosphere. 2018;197:502-512. PubMed PMID: 29407812.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Performance of nanoscale zero-valent iron in nitrate reduction from water using a laboratory-scale continuous-flow system. AU - Khalil,Ahmed M E, AU - Eljamal,Osama, AU - Saha,Bidyut Baran, AU - Matsunaga,Nobuhiro, Y1 - 2018/01/18/ PY - 2017/09/04/received PY - 2018/01/14/revised PY - 2018/01/16/accepted PY - 2018/2/7/pubmed PY - 2018/5/18/medline PY - 2018/2/7/entrez KW - Continuous–flow system KW - Copper salt addition KW - Laboratory-scale application KW - Nanoscale zero-valent iron KW - Nitrate removal KW - River water SP - 502 EP - 512 JF - Chemosphere JO - Chemosphere VL - 197 N2 - Nanoscale zero-valent iron (nZVI) is a versatile treatment reagent that should be utilized in an effective application for nitrate remediation in water. For this purpose, a laboratory-scale continuous-flow system (LSCFS) was developed to evaluate nZVI performance in removal of nitrate in different contaminated-water bodies. The equipment design (reactor, settler, and polisher) and operational parameters of the LSCFS were determined based on nZVI characterization and nitrate reduction kinetics. Ten experimental runs were conducted at different dosages (6, 10 and 20 g) of nZVI-based reagents (nZVI, bimetallic nZVI-Cu, CuCl2-added nZVI). Effluent concentrations of nitrogen and iron compounds were measured, and pH and ORP values were monitored. The major role exhibited by the recirculation process of unreacted nZVI from the settler to the reactor succeeded in achieving overall nitrate removal efficiency (RE) of >90%. The similar performance of both nZVI and copper-ions-modified nZVI in contaminated distilled water was an indication of LSCFS reliability in completely utilizing iron nanoparticles. In case of treating contaminated river water and simulated groundwater, the nitrate reduction process was sensitive towards the presence of interfering substances that dropped the overall RE drastically. However, the addition of copper ions during the treatment counteracted the retardation effect and greatly enhanced the nitrate RE. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29407812/Performance_of_nanoscale_zero_valent_iron_in_nitrate_reduction_from_water_using_a_laboratory_scale_continuous_flow_system_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)30098-5 DB - PRIME DP - Unbound Medicine ER -