Arsenic leachability in water treatment adsorbents.
作者： Chuanyong Jing , Suqin Liu , Manish Patel , Xiaoguang Meng
DOI: 10.1021/ES050290P
关键词:
摘要: Arsenic leachability in water treatment adsorbents was studied using batch leaching tests, surface complexation modeling and extended X-ray absorption fine structure (EXAFS) spectroscopy. Spent were collected from five pilot-scale filters that tested for removal of arsenic groundwater Southern New Jersey. The spent media included granular ferric hydroxide (GFH), oxide, titanium dioxide, activated alumina, modified alumina. As determined with the Toxicity Characteristic Leaching Procedure (TCLP, 0.1 M acetate solution) below 180 μg L-1 all media. leachate concentration California Waste Extraction Test (0.2 citrate more than 10 times higher TCLP reached as high 6650 GFH sample. EXAFS results indicate forms inner-sphere bidentate binuclear complexes on adsorbent surfaces. adsorption/desorption behaviors each media...
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