| Title: | Raw hematite based Fe(III) bio-reduction process for humified landfill leachate treatment |
| Author(s): | Li R; Jiang Y; Xi B; Li M; Meng X; Feng C; Mao X; Liu H; Jiang Y; |
| Address: | "State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China. State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China. Electronic address: xibeidou@yeah.net. State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: limingxiao8122@163.com. Center for Environmental Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. School of Water Resources and Environment, China University of Geosciences (Beijing), No. 29 Xueyuan Road, Haidian District, Beijing 100083, China. School of Resource and Environmental Science, Wuhan University, Wuhan 430072, China" |
| DOI: | 10.1016/j.jhazmat.2018.05.002 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Microorganisms from paddy soils and raw hematite are used for enhancing natural Fe(III) bio-reduction, in order to remove macromolecular organic pollutants from humified landfill leachate. Based on batch experiments, 60% of refractory organics can be adsorbed by hematite in 12 days. In the presence of Fe(III)-reducing bacteria, 489.60?ª++/-?ª+0.14?ª+mg?ª+L(-1) of dissolved organic matters can be degraded to 51.90?ª++/-?ª+3.96?ª+mg?ª+L(-1) within 50 days; twelve types of semi volatile organic compounds can be degraded; hereby, the reaction follows a first-order kinetics. Crystalline Fe(III) is transformed into the amorphous form and reduced to Fe(II), hydroquinone functional groups in the humic acid (HA) are transformed to quinone ones, and the formation of HA-hematite ligands is promoted. Comparing with most of the studies about electron shuttling of HA, the transformation of quinone in the HA to hydroquinone could not be observed in the present bio-system. Based on column evaluations, more than 93% of chemical oxygen demand (influent concentration of 658?ª++/-?ª+19?ª+mg?ª+L(-1)) could be removed microbially under flow conditions, when the hydraulic retention time was 45?ª+h. Raw hematite-based Fe(III) bio-reduction has a promising potential for the removal of humic and benzene series in humified landfill leachate" |
| Keywords: | Fe(III) bio-reduction Humified landfill leachate Microorganisms Paddy soil Raw hematite; |
| Notes: | "PubMed-not-MEDLINELi, Rui Jiang, Yu Xi, Beidou Li, Mingxiao Meng, Xiaoguang Feng, Chuanping Mao, Xuhui Liu, Hongliang Jiang, Yonghai eng Netherlands 2018/05/16 J Hazard Mater. 2018 Aug 5; 355:10-16. doi: 10.1016/j.jhazmat.2018.05.002. Epub 2018 May 3" |
