Groundwater remediation using Magnesium–Aluminum alloys and in situ layered doubled hydroxides

Zhang，Jingqi1; Hu，Hanjun2,3; Chao，Jingbo4; Tang，Yang5; Wan，Pingyu5; Yuan，Qipeng1; Fisher，Adrian C.6; Coulon，Frederic7; Hu，Qing2,3; Yang，Xiao Jin1

2021

10.1016/j.envres.2021.112241

ENVIRONMENTAL RESEARCH   影响因子和分区

0013-9351

1096-0953

In situ remediation of groundwater by zerovalent iron (ZVI)-based technology faces the problems of rapid passivation, fast agglomeration, limited range of pollutants and secondary contamination. Here a new concept of Magnesium–Aluminum (Mg–Al) alloys and in situ layered double hydroxides on is proposed for the degradation and removal of a wide variety of inorganic and organic pollutants from groundwater. The Mg–Al alloy provides the electrons for the chemical reduction and/or the degradation of pollutants while released Mg, Al and OH ions react to generate in situ LDH precipitates, incorporating other divalent and trivalent metals and oxyanions pollutants and further adsorbing the micropollutants. The Mg–Al alloy outperforms ZVI for treating acidic, synthetic groundwater samples contaminated by complex chemical mixtures of heavy metals (Cd, Cr, Cu, Ni and Zn), nitrate, AsO, methyl blue, trichloroacetic acid and glyphosate. Specifically, the Mg–Al alloy achieves removal efficiency ≥99.7% for these multiple pollutants at concentrations ranging between 10 and 50 mg L without producing any secondary contaminants. In contrast, ZVI removal efficiency did not exceed 90% and secondary contamination up to 220 mg L Fe was observed. Overall, this study provides a new alternative approach to develop efficient, cost-effective and green remediation for water and groundwater.

Chemical degradation Groundwater remediation In situ layered double hydroxides Mg–Al alloy

SCI

英语

其他

Ministry of Ecology and Environment[2018ZX07109-002] ; State Administration for Market Regulation[21-ANL1806]

Environmental Sciences & Ecology ; Public, Environmental & Occupational Health

Environmental Sciences ; Public, Environmental & Occupational Health

WOS:000730784300005

ACADEMIC PRESS INC ELSEVIER SCIENCE

ENVIRONMENT/ECOLOGY

2-s2.0-85118725321

Scopus

1.State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing,100029,China
2.Southern University of Science and Technology,Shenzhen,518055,China
3.Beijing Huanding Environmental Big Data Institute,Beijing,No. 1 Wangzhuang Road,100083,China
4.National Institute of Metrology,Beijing,100029,China
5.National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis,Beijing University of Chemical Technology,Beijing,100029,China
6.Department of Chemical Engineering and Biotechnology,University of Cambridge,Cambridge,CB2 1TN,United Kingdom
7.School of Water,Energy and Environment,Cranfield University,Cranfield,MK43 0AL,United Kingdom

Zhang，Jingqi,Hu，Hanjun,Chao，Jingbo,等. Groundwater remediation using Magnesium–Aluminum alloys and in situ layered doubled hydroxides[J]. ENVIRONMENTAL RESEARCH,2021,204.

Zhang，Jingqi.,Hu，Hanjun.,Chao，Jingbo.,Tang，Yang.,Wan，Pingyu.,...&Yang，Xiao Jin.(2021).Groundwater remediation using Magnesium–Aluminum alloys and in situ layered doubled hydroxides.ENVIRONMENTAL RESEARCH,204.

Zhang，Jingqi,et al."Groundwater remediation using Magnesium–Aluminum alloys and in situ layered doubled hydroxides".ENVIRONMENTAL RESEARCH 204(2021).