腐殖酸、高岭土和铜在含水层介质中的协同迁移
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摘要
通过室内模拟柱实验,设计不同污染次序实验,开展高岭土、腐殖酸和Cu在含水层介质的协同迁移研究。研究结果表明:在预先吸附了Cu的砂柱中,高岭土对Cu解吸作用微弱,腐殖酸显著促进了Cu在石英砂柱的解吸;而混合注入腐殖酸和高岭土溶液Cu的解吸程度要低于单独注入腐殖酸,说明在混合溶液中,高岭土占据了腐殖酸的吸附点位;腐殖酸对高岭土的迁移有显著促进作用。
Co-transport of humic acid,kaolinite and copper in saturated porous media by sand column was evaluated. The results indicated that kaolin colloid promote Cu migration effect is not obvious. Humic acid facilitated Cu transport was found. But mixed kaolinite and humic acid facilitated Cu lower compared with single humic acid.In the presence of humic acid,the mobility of colloids increases considerably. The co-presence of HA and kaolin slightly decreased HA transport in sand column compared with that in the presence of HA alone. The colloid-facilitated Cu transport and the stripping effect of Cu from sand column have important implications for risk assessments of Cu mobility in soil environment.
Co-transport of humic acid,kaolinite and copper in saturated porous media by sand column was evaluated. The results indicated that kaolin colloid promote Cu migration effect is not obvious. Humic acid facilitated Cu transport was found. But mixed kaolinite and humic acid facilitated Cu lower compared with single humic acid.In the presence of humic acid,the mobility of colloids increases considerably. The co-presence of HA and kaolin slightly decreased HA transport in sand column compared with that in the presence of HA alone. The colloid-facilitated Cu transport and the stripping effect of Cu from sand column have important implications for risk assessments of Cu mobility in soil environment.
引文
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12李颖.水体中重金属、腐殖酸和黏土颗粒物之间的相互作用研究[D].济南:山东大学,2010Li Ying.Interaction between heavy metals,humic acid and clay particles in water[D].Jinan:Shandong University,2010
13 Sun H,Gao B,Tian Y,et al.Kaolinite and lead in saturated porous media:facilitated and impeded transport[J].Jounal of Environmental Engineering,2010,136:1305-1308
2 Akbour R,Douch J,Hamdani M,et al.Transport of kaolinite colloids through quartz sand:influence of humic acid,Ca2+,and trace metals[J].Journal of Colloid and Interface Science,2002,253:1-8
3 Philippe A,Schaumann G E.Interactions of dissolved organic matter with natural and engineered inorganic colloids:A review[J].Environtal Science Technology,2014,48:8946-8962
4孙慧敏.黏土矿物胶体对铅的环境行为影响研究[D].杨凌:西北农林科技大学,2010Sun Huimin.Study on effect of clay mineral colloid on the environmental behavior of Pb[D].Yangling:Northwest A&FUniversity,2010
5 Flury M,Mathison J B,Harsh J B.In situ mobilization of colloids and transport of cesium in Hanford sediments[J].Environmental Science Technology,2002,36:5335-5341
6 Cheng T,Saiers J E.Mobilization and transport of in situ colloids during drainage and imbibition of partially saturated sediments[J].Water Resourse Research,2009,45:2263-2289
7 Tripathy A.Hydrodynamically and chemically induced in situ kaolin particle release from porous media an experimental study[J].Advanced Powder Technology,2010,21:564-572
8 Srivastava P,Singh B,Angove M.Competitive adsorption behavior of heavy metals on kaolinite[J].Journal of Colloid Interface Science,2005,290:28-38
9 Gupta S,Bhattacharyya K G.Immobilization of Pb(Ⅱ),Cd(Ⅱ)and Ni(Ⅱ)ions on kaolinite and montmorillonite surfaces from aqueous medium[J].Journal of Environmental Management,2008,87:46-58
10 Aijun Y,Changle Q,Shusen M,et al.Effects of humus on the environmental activity of mineral-bound Hg:influence on Hg volatility[J].Applied Geochemistry,2006,21:446-454
11 Wang D J,Chu L Y,Paradelo M,et al.Transport behaviorofhumic acid-modified nano-hydroxyapatite in saturated packed column:effects of Cu,ionic strength,and ionic composition[J].Journal of Colloid and Interface Science,2011,360:398-407
12李颖.水体中重金属、腐殖酸和黏土颗粒物之间的相互作用研究[D].济南:山东大学,2010Li Ying.Interaction between heavy metals,humic acid and clay particles in water[D].Jinan:Shandong University,2010
13 Sun H,Gao B,Tian Y,et al.Kaolinite and lead in saturated porous media:facilitated and impeded transport[J].Jounal of Environmental Engineering,2010,136:1305-1308