Catalytic effect of soil colloids on the reaction between Cr-VI and p-methoxyphenol
文献类型：期刊论文
| 作者 | Zhou, DM; Chen, HM; Zheng, CR; Tu, C |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2001 |
| 卷号 | 111期号:1页码:75-81 |
| 关键词 | Cr-VI p-methoxyphenol catalytic reaction soil colloids pollution |
| ISSN号 | 0269-7491 |
| 通讯作者 | Chen, HM() |
| 英文摘要 | Adsorption of Cr-VI and p-methoxyphenol (PMP) on soil colloids at different pH media was studied. The resulting k(1) and I? of 1.89 x 10(2) and 0.53 (r(2) = 0.99) and k(2) and b of 0.13 and 1.25 x 10(3) (r(2) = 0.96) were obtained from Freundlich (Q = k(1)C(aq)(n)) and Langmuir [Q = k(2)bC(aq)/(1 + k(2)C(aq))] simulation equations, respectively, for Cr-VI adsorption on soil colloids (pH 4.20). The adsorption of PMP on soil colloids in pH 5.72 media was simulated by five different equations and the results indicated that the Fritz-Schluender one (r(2) = 1.00) was the most suitable among them. Adsorption quantity of Cr-VI and PMP on colloids increased with increasing acidity in the pH range of 3.5-9.0. Study of Cr-VI adsorption kinetics indicated that the adsorption equilibrium of Cr-VI was reached rapidly within 2 h. In pure aqueous solution, Cr-VI reduction by PMP was observed only when the media's pH was lower than 4.0. Oxidation and reduction reaction between CrVI and p-methoxyphenol obviously occurred when soil colloids were involved in this system, even at pH greater than or equal to 7.0, which strongly suggested that minerals in soil colloids acted as catalysts to speed the reaction of Cr-VI and PMP. The oxidized product of PMP by Cr-VI, extracted by chloroform in acid media and analyzed by gas chromatography-mass spectrometry, was identified as benzoquinone. The reaction included two steps of one electron process. (C) 2000 Elsevier Science Ltd. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | CHROMIUM(VI) REDUCTION ; SUBSTITUTED PHENOLS ; REDOX INTERACTIONS ; HEXAVALENT FORMS ; ACTIVATED CARBON ; ADSORPTION ; SORPTION ; CR(VI) ; DESORPTION ; CHROMATE |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000089336500008 |
| 出版者 | ELSEVIER SCI LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559169 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Chen, HM |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, LMCP, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, DM,Chen, HM,Zheng, CR,et al. Catalytic effect of soil colloids on the reaction between Cr-VI and p-methoxyphenol[J]. ENVIRONMENTAL POLLUTION,2001,111(1):75-81. |
| APA | Zhou, DM,Chen, HM,Zheng, CR,&Tu, C.(2001).Catalytic effect of soil colloids on the reaction between Cr-VI and p-methoxyphenol.ENVIRONMENTAL POLLUTION,111(1),75-81. |
| MLA | Zhou, DM,et al."Catalytic effect of soil colloids on the reaction between Cr-VI and p-methoxyphenol".ENVIRONMENTAL POLLUTION 111.1(2001):75-81. |
入库方式： iSwitch采集
来源：南京土壤研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。