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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (5): 712-718    DOI: 10.1631/jzus.2007.A0712
Environmental and Energy Engineering     
Removal and transformation of organic matter during soil-aquifer treatment
ZHAO Qing-liang, XUE Shuang, YOU Shi-jie, WANG Li-na
School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Abstract  This study investigated the removal and transformation of organic matter through laboratory-scale soil-aquifer treatment (SAT) soil columns over a 110-day period. Reductions in total organic carbon (TOC), dissolved organic carbon (DOC), biodegradable dissolved organic carbon (BDOC), nonbiodegradable dissolved organic carbon (NBDOC) and absorbance of ultraviolet light at 254 nm (UV-254) averaged 71.46%, 68.05%, 99.31%, 33.27% and 38.96% across the soil columns, respectively. DOC/TOC ratios increased slightly with depth while BDOC/DOC ratios showed a converse trend. DOC exiting the soil-column system contained only a very small biodegradable fraction. SAT decreased the concentration of DOC present in feed water but increased its aromaticity, as indicated by specific ultraviolet light absorbance (SUVA), which increased by 50%~115% across the soil columns, indicating preferential removal of non-aromatic DOC during SAT. Overall, laboratory-scale SAT reduced trihalomethane formation potential (THMFP), although specific THMFP increased. THMFP reduction was dominated by removal in chloroform. All samples exhibited a common general relationship with respect to weight: chloroform>dichlorobromomethane >dibromochloromethane>bromoform.

Key words： Soil-aquifer treatment (SAT)      Organic matter      Dissolved organic matter      Trihalomethane formation potential      Biodegradable dissolved organic carbon (BDOC)      Specific trihalomethane formation potential     
Received: 19 December 2006     
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ZHAO Qing-liang
XUE Shuang
YOU Shi-jie
WANG Li-na
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ZHAO Qing-liang, XUE Shuang, YOU Shi-jie, WANG Li-na. Removal and transformation of organic matter during soil-aquifer treatment. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(5): 712-718.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A0712     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I5/712

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