Toxicological characterization of a novel wastewater treatment process using EDTA-Na2Zn as draw solution (DS) for the efficient treatment of MBR-treated landfill leachate.
Landfill leachate has become an important source of environmental pollution in past decades, due to the increase of waste volume. Acute toxic and genotoxic hazards to organisms can be caused by landfill leachate. Thus, how to efficiently recover water from landfill leachate and effectively eliminate combined toxicity of landfill leachate are the most pressing issues in waste management. In this study, EDTA-Na2Zn as draw solution (DS) was used to remove the toxicity of membrane bioreactor-treated landfill leachate (MBR-treated landfill leachate) in forward osmosis (FO) process, and nanofiltration (NF) was designed for recovering the diluted DS. Zebrafish and human cells were used for toxicity assay after the novel wastewater treatment process using EDTA-Na2Zn as DS. Results showed that the water recovery rate of MBR-treated landfill leachate (M-LL) in FO membrane system could achieve 66.5% and 71.2% in the PRO and FO mode respectively, and the diluted DS could be efficiently recovered by NF. Toxicity tests performed by using zebrafish and human cells showed that M-LL treated by EDTA-Na2Zn had no toxicity effect on zebrafish larvae and human cells, but it had very slight effect on zebrafish embryos. In conclusion, all results indicated that EDTA-Na2Zn as DS can effectively eliminate toxicity of landfill leachate and this method is economical and eco-friendly for treatment of different types of landfill leachate.
Research Center for Environment and Health, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Aping
A
Niu
Center of Membrane Technology, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Yi-Wei
YW
Ren
Research Center for Environment and Health, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Li
L
Yang
Research Center for Environment and Health, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Shao-Lin
SL
Xie
Research Center for Environment and Health, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Pan-Pan
PP
Jia
Research Center for Environment and Health, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Jing-Hui
JH
Zhang
Center of Membrane Technology, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China.
Xiao
X
Wang
Center of Membrane Technology, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China. Electronic address: lijing@cigit.ac.cn.
Jing
J
Li
Research Center for Environment and Health, Eco-Environmental Institute for Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 401122, China. Electronic address: deshengpei@gmail.com.
De-Sheng
DS
Pei
D000818:Animals; D019149:Bioreactors; D002460:Cell Line; D004492:Edetic Acid / Q000031:analogs & derivatives* / Q000737:chemistry; D006801:Humans; D007814:Larva / Q000187:drug effects; D009995:Osmosis; D012996:Solutions; D018675:Toxicity Tests; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D015027:Zebrafish
D004492:Edetic Acid; D012996:Solutions; D062065:Wastewater; D014874:Water Pollutants, Chemical
Acute toxicity; EDTA-Na(2)Zn; Landfill leachate; Membrane bioreactor; Zebrafish