کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581250 | 1453158 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reductive dechlorination of hexachlorobenzene by Cu/Fe bimetal in the presence of nonionic surfactant
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Reductive dechlorination of hexachlorobenzene by Cu/Fe bimetal in the presence of nonionic surfactant Reductive dechlorination of hexachlorobenzene by Cu/Fe bimetal in the presence of nonionic surfactant](/preview/png/581250.png)
چکیده انگلیسی
This study investigated the enhancement of nonionic surfactant (TritonX-100, TX-100) on the reductive dechlorination of hexachlorobenzene (HCB) by microscale Cu/Fe bimetal. HCB reduction by Cu/Fe without TX-100, in aqueous TX-100, adsorbed with TX-100 and prepared with TX-100 was compared. Results showed that HCB reduction by Cu/Fe in aqueous TX-100 increased with increasing TX-100 concentration, reached a maximum of 98.6% when aqueous TX-100 concentration attained its critical micelle concentration (CMC), and decreased with the further increase in TX-100 concentration. The mechanism was suggested as the increased HCB mass transport at low TX-100 concentration below CMC and the coverage of reactive sites at high TX-100 concentration above CMC. The greatest reduction was achieved by Cu/Fe in the presence of 0.2Â mM TX-100, followed by Cu/Fe adsorbed and prepared with 0.2Â mM TX-100. Pentachlorobenzene and tetrachlorobenzene were found as the main dechlorination intermediates. Successive reduction by Cu/Fe in aqueous TX-100 solution could be maintained above 98% for four cycles. It is an alternative to use nonionic surfactants to enhance the reductive dechlorination of hydrophobic polychlorinated aromatic hydrocarbons (PCAH) by Cu/Fe bimetal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 170, Issues 2â3, 30 October 2009, Pages 895-901
Journal: Journal of Hazardous Materials - Volume 170, Issues 2â3, 30 October 2009, Pages 895-901
نویسندگان
Zhonghua Zheng, Songhu Yuan, Yang Liu, Xiaohua Lu, Jinzhong Wan, Xiaohui Wu, Jing Chen,