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Effect of pH on PCP remediation by smectite supported Pd-0/Fe-0
HanJunli; JiaHanzhong; SongCunyi
Conference Name2012 International Conference on Sustainable Energy and Environmental Engineering, ICSEEE 2012
Conference DateDecember 29, 2012 - December 30, 2012
Conference PlaceGuangzhou, PEOPLES R CHINA

Due to its influence on iron corrosion and involvement in dechlorination reaction, the concentration of H+ (i.e. reaction pH) is crucial to the reactivity and efficiency of nanosized Pd0/Fe0. In this study, PCP dechlorination by smectite-templated Pd0/Fe0 was studied and the effect of pH on PCP dechlorination was investigated in detail. The reaction rate constant is critically dependant on the reaction pH over the range 6.0 similar to 10.0. When the pH is 6.0 similar to 8.0, the dechlorination rate constant (k(obs)) increases rapidly with decreasing the reaction pH value; the rate change is up to 3.346 folds with decreasing of per pH unit; while it decreases down to 0.3338 when pH is in the range 8.0 similar to 10.0. The reductive efficiency of zero-valent iron (ZVI) was further investigated by spiking excess PCP in the reaction system. The maximal reaction efficiency of ZVI for PCP dechlorination attains to 78% when pH is 9.0. The difference between the dechlorination rate and reductive efficiency with respect to reaction pH suggest that ZVI could not be effectively utilized to reduce PCP under acidic condition.

KeywordPentachlorophenol Palladized Zero-valent Iron Smectite Ph
Indexed ByEI
Document Type会议论文
AffiliationUniv Sci & Technol Beijing, Coll Civil & Environm Engn, Beijing 100083, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi, Peoples R China;Univ Inner Mongolia, Baotou Normal Coll Sci & Technol, Baotou, Peoples R China
Recommended Citation
GB/T 7714
HanJunli,JiaHanzhong,SongCunyi. Effect of pH on PCP remediation by smectite supported Pd-0/Fe-0[C],2013:1490-1496.
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