Influence of Organo-Metal Interactions on Regeneration of Exhausted Clay Mineral Sorbents in Soil Columns Loaded with Heavy Metals

Yasser REFAEY; Boris JANSEN; Pim DE VOOGT; John R.PARSONS; Abdel-Hamid EL-SHATER; Abdel-Aziz EL-HADDAD; Karsten KALBITZ

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Influence of Organo-Metal Interactions on Regeneration of Exhausted Clay Mineral Sorbents in Soil Columns Loaded with Heavy Metals

机译：有机金属相互作用对重金属负载土柱中黏土矿物吸收剂再生的影响

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Natural clay minerals can play an important role in crude remediation of wastewater polluted with the heavy metals (HMs) Cu,Zn and Ni.The presence and timing of addition of natural dissolved organic matter (DOM) have a significant effect on the HM removal by clay mineral sorbents.However,the influence of the presence of DOM on the remediation of the used clay mineral sorbents once saturated with HMs is largely unknown.To resolve this,clay mineral-rich soil column of varying composition,loaded (i) with Cu,Zn and Ni only,(ii) first with DOM followed by Cu,Zn and Ni,or (iii) with DOM,Cu,Zn and Ni simultaneously,was used in a set of desorption experiments.The soil columns were leached with 0.001 mol L-1 CaCl2 dissolved in water as control eluent and 0.001 mol L-1 CaCl2 dissolved in DOM as treatment eluent.During the preceding loading phase of the sorbent,the timing of DOM addition (sequential or concurrent with HMs) was found to have a significant influence on the subsequent removal of the HMs.In particular when the column was loaded with DOM and HMs simultaneously,largely irreversible co-precipitation took place.Our results indicate that the regeneration potential of clay mineral sorbents in wastewater treatment will be significantly reduced when the treated water is rich in DOM.In contrast,in manured agricultural fields (where HMs enter together with DOM),HM mobility will be lower than expected from interaction dynamics of HMs and clay minerals.

机译：天然粘土矿物可在重金属（Cu，Zn和Ni）污染的废水的粗修复中发挥重要作用。天然溶解有机物（DOM）的存在和添加时间对HM去除HM的影响很大然而，DOM的存在对用HMs饱和的用过的粘土矿物吸附剂的修复的影响尚不清楚。为了解决这个问题，改变了（i）负载了Cu的不同组成的富含粘土矿物的土壤柱（ii）首先使用DOM，然后使用Cu，Zn和Ni，或（iii）同时使用DOM，Cu，Zn和Ni，用于一组解吸实验。土壤柱中的0.001浸出溶解在水中的mol L-1 CaCl2作为对照洗脱液，溶解在DOM中的0.001 mol L-1 CaCl2作为处理洗脱液。在吸附剂的上一个加载阶段，发现DOM添加的时间（与HMs顺序或同时存在）对随后的移除产生重大影响HMs。特别是当该柱同时加载DOM和HMs时，发生了不可逆的大共沉淀。我们的结果表明，当处理后的水中富含DOM时，粘土矿物吸附剂在废水处理中的再生潜力将大大降低。相反，在有肥料的农田（HM与DOM一起进入）中，HM的迁移率将低于HM与粘土矿物相互作用的动力学预期。

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《土壤圈（英文版）》 |2017年第3期|579-587|共9页
作者
Yasser REFAEY; Boris JANSEN; Pim DE VOOGT; John R.PARSONS; Abdel-Hamid EL-SHATER; Abdel-Aziz EL-HADDAD; Karsten KALBITZ;
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Institute for Biodiversity and Ecosystem Dynamics(IBED), University of Amsterdam, P.O.Box 94240, 1090GE Amsterdam The Netherlands;

Geology Department, Faculty of Science, Sohag University, P.O.Box 82524, Sohag Egypt;

Institute for Biodiversity and Ecosystem Dynamics(IBED), University of Amsterdam, P.O.Box 94240, 1090GE Amsterdam The Netherlands;

Institute for Biodiversity and Ecosystem Dynamics(IBED), University of Amsterdam, P.O.Box 94240, 1090GE Amsterdam The Netherlands;

Institute for Biodiversity and Ecosystem Dynamics(IBED), University of Amsterdam, P.O.Box 94240, 1090GE Amsterdam The Netherlands;

Geology Department, Faculty of Science, Sohag University, P.O.Box 82524, Sohag Egypt;

Geology Department, Faculty of Science, Sohag University, P.O.Box 82524, Sohag Egypt;

Institute for Biodiversity and Ecosystem Dynamics(IBED), University of Amsterdam, P.O.Box 94240, 1090GE Amsterdam The Netherlands;

Soil Resources and Land Use, Institute of Soil Science and Site Ecology, Faculty of Environmental Sciences, Technical University Dresden, 01737 Tharandt Germany;

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Influence of Organo-Metal Interactions on Regeneration of Exhausted Clay Mineral Sorbents in Soil Columns Loaded with Heavy Metals

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