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Nanoscale zero-valent iron (nZVI) for the treatment of concentrated Cu(II) wastewater: a field demonstration.
Environ Sci Process Impacts 2014; 16(3):524-33ES

Abstract

A field demonstration was conducted to assess the feasibility of nanoscale zero-valent iron (nZVI) for the treatment of wastewater containing high levels of Cu(II). Pilot tests were performed at a printed-circuit-board manufacturing plant, treating 250,000 L of wastewater containing 70 mg L(-1) Cu(II) with a total of 55 kg of nZVI. A completely mixed reactor of 1,600 L was operated continuously with flow rates ranging from 1000 to 2500 L h(-1). The average Cu(II) removal efficiency was greater than 96% with 0.20 g L(-1) nZVI and a hydraulic retention time of 100 min. The nZVI reactor achieved a remarkably high volumetric loading rate of 1876 g Cu per m(3) per day for Cu(II) removal, surpassing the loading rates of conventional technologies by more than one order of magnitude. The average removal capacity of nZVI for Cu(II) was 0.343 g Cu per gram of Fe. The Cu(II) removal efficiency can be reliably regulated by the solution Eh, which in turn is a function of nZVI input and hydraulic retention time. The ease of separation and recycling of nZVI contribute to process up-scalability and cost effectiveness. Cu(II) was reduced to metallic copper and cuprite (Cu2O). The end product is a valuable composite of iron and copper (∼20-25%), which can partially offset the treatment costs.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China. lishaolin@tongji.edu.cn.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24473735

Citation

Li, Shaolin, et al. "Nanoscale Zero-valent Iron (nZVI) for the Treatment of Concentrated Cu(II) Wastewater: a Field Demonstration." Environmental Science. Processes & Impacts, vol. 16, no. 3, 2014, pp. 524-33.
Li S, Wang W, Yan W, et al. Nanoscale zero-valent iron (nZVI) for the treatment of concentrated Cu(II) wastewater: a field demonstration. Environ Sci Process Impacts. 2014;16(3):524-33.
Li, S., Wang, W., Yan, W., & Zhang, W. X. (2014). Nanoscale zero-valent iron (nZVI) for the treatment of concentrated Cu(II) wastewater: a field demonstration. Environmental Science. Processes & Impacts, 16(3), pp. 524-33. doi:10.1039/c3em00578j.
Li S, et al. Nanoscale Zero-valent Iron (nZVI) for the Treatment of Concentrated Cu(II) Wastewater: a Field Demonstration. Environ Sci Process Impacts. 2014;16(3):524-33. PubMed PMID: 24473735.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanoscale zero-valent iron (nZVI) for the treatment of concentrated Cu(II) wastewater: a field demonstration. AU - Li,Shaolin, AU - Wang,Wei, AU - Yan,Weile, AU - Zhang,Wei-xian, Y1 - 2014/01/29/ PY - 2014/1/30/entrez PY - 2014/1/30/pubmed PY - 2014/7/31/medline SP - 524 EP - 33 JF - Environmental science. Processes & impacts JO - Environ Sci Process Impacts VL - 16 IS - 3 N2 - A field demonstration was conducted to assess the feasibility of nanoscale zero-valent iron (nZVI) for the treatment of wastewater containing high levels of Cu(II). Pilot tests were performed at a printed-circuit-board manufacturing plant, treating 250,000 L of wastewater containing 70 mg L(-1) Cu(II) with a total of 55 kg of nZVI. A completely mixed reactor of 1,600 L was operated continuously with flow rates ranging from 1000 to 2500 L h(-1). The average Cu(II) removal efficiency was greater than 96% with 0.20 g L(-1) nZVI and a hydraulic retention time of 100 min. The nZVI reactor achieved a remarkably high volumetric loading rate of 1876 g Cu per m(3) per day for Cu(II) removal, surpassing the loading rates of conventional technologies by more than one order of magnitude. The average removal capacity of nZVI for Cu(II) was 0.343 g Cu per gram of Fe. The Cu(II) removal efficiency can be reliably regulated by the solution Eh, which in turn is a function of nZVI input and hydraulic retention time. The ease of separation and recycling of nZVI contribute to process up-scalability and cost effectiveness. Cu(II) was reduced to metallic copper and cuprite (Cu2O). The end product is a valuable composite of iron and copper (∼20-25%), which can partially offset the treatment costs. SN - 2050-7895 UR - https://www.unboundmedicine.com/medline/citation/24473735/Nanoscale_zero_valent_iron__nZVI__for_the_treatment_of_concentrated_Cu_II__wastewater:_a_field_demonstration_ L2 - https://doi.org/10.1039/c3em00578j DB - PRIME DP - Unbound Medicine ER -