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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ni, Jinzhi Chen, Weifeng |
| Description | Author Affiliation: Chen W ( College of geographical Science, Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process, Key Laboratory of Subtropical Mountain Ecology (Ministry of Science and Technology and Fujian Province Funded), Fujian Normal University, Fuzhou, Fujian 350007, China. Electronic address: fengweichen1986@163.com.); Ni J ( College of geographical Science, Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process, Key Laboratory of Subtropical Mountain Ecology (Ministry of Science and Technology and Fujian Province Funded), Fujian Normal University, Fuzhou, Fujian 350007, China.) |
| Abstract | Dehydrochlorination of 1,1,2,2-tetrachloroethane (TeCA) in graphene oxide (GO)-based materials-water two-phase system can be enhanced strongly. However, the dehydrochlorination kinetic of adsorbed TeCA on GO-based materials' surface is still unclear. Thus, in this study the dehydrochlorination kinetics of adsorbed TeCA on GO based-materials' surface was compared to the kinetics of dissolved TeCA in aqueous solution. The results showed that the dehydrochlorination kinetic constants of adsorbed TeCA on GO-based materials' surface (k ) were much greater than those of dissolved TeCA in aqueous solution (k ) due to the deprotonated surface oxygen-containing functional groups (e.g. COO , and O ) served as conjugated bases to catalyze the reaction. In particular, at pH 8.0 and 9.0, the k values for GO (20mg/L) were approximately 3 orders magnitude greater than k values. Furthermore, the k values of adsorbed TeCA for the low concentration of GO (20mg/L) were always greater than that for the high concentration of GO (100mg/L). The primary mechanism was that GO was apt to aggregate at high concentration, which enhanced the steric hindrance between O-containing functional groups and TeCA molecular. Consequently, the interfacial effects of GO-based materials at their low concentration could strongly enhance the transformation of adsorbed TeCA in aqueous environment. |
| ISSN | 03043894 |
| Issue Number | Pt B |
| Journal | Journal of Hazardous Materials |
| Volume Number | 324 |
| e-ISSN | 18733336 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2017-02-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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