Remediation of arsenic-contaminated groundwater using media-injected permeable reactive barriers with a modified montmorillonite: sand tank studies

Environmental Science and Pollution Research International
Ximing LuoXu Li

Abstract

A modified montmorillonite (MMT) was prepared using an acid activation-sodium activation-iron oxide coating method to improve the adsorption capacities of natural MMTs. For MMT, its interlamellar distance increased from 12.29 to 13.36 Å, and goethite (α-FeOOH) was intercalated into its clay layers. Two novel media-injected permeable reactive barrier (MI-PRB) configurations were proposed for removing arsenic from groundwater. Sand tank experiments were conducted to investigate the performance of the two MI-PRBs: Tank A was filled with quartz sand. Tank B was packed with quartz sand and zero-valent iron (ZVI) in series, and the MMT slurry was respectively injected into them to form reactive zones. The results showed that for tank A, total arsenic (TA) removal of 98.57% was attained within the first 60 mm and subsequently descended slowly to 88.84% at the outlet. For tank B, a similar spatial variation trend was observed in the quartz sand layer, and subsequently, TA removal increased to ≥99.80% in the ZVI layer. TA removal by MMT mainly depended on both surface adsorption and electrostatic adhesion. TA removal by ZVI mainly relied on coagulation/precipitation and adsorption during the iron corrosion. The two MI-PRBs are feasible ...Continue Reading

References

Oct 16, 1999·Journal of Hazardous Materials·A R Gavaskar
Sep 8, 2001·Water Research·L A Schipper, M Vojvodić-Vuković
Aug 27, 2002·Environmental Monitoring and Assessment·Baohua GuJizhong Zhou
Jan 11, 2003·Environmental Science & Technology·Bruce A ManningJory A Yarmoff
Apr 19, 2003·Journal of Colloid and Interface Science·Véronique LenobleJean-Claude Bollinger
Jun 1, 2005·Chemosphere·Sunbaek BangXiaoguang Meng
Oct 1, 2005·Journal of Hazardous Materials·Hongwen SunGuannan Xu
Jun 28, 2008·Journal of Hazardous Materials·Pratap ChutiaShigeo Satokawa
Jan 13, 2009·Chemosphere·Vivek Singh ChauhanNalini Sankararamakrishnan
Jun 29, 2011·Journal of Environmental Management·M A HashimBhaskar Sengupta

❮ Previous
Next ❯

Citations

Sep 21, 2017·Environmental Science and Pollution Research International·Giovanni Francesco SantonastasoDino Musmarra

❮ Previous
Next ❯

Related Concepts

Related Feeds

Blood Clotting Disorders

Thrombophilia includes conditions with increased tendency for excessive blood clotting. Blood clotting occurs when the body has insufficient amounts of specialized proteins that make blood clot and stop bleeding. Here is the latest research on blood clotting disorders.