Effect of Initial Concentration on Adsorption-Desorption Characteristics and Desorption Hysteresis of Hexachlorobenzene in Soils
文献类型：期刊论文
| 作者 | Gao Hong-Jian1,2; Jiang Xin2 |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2010-02-01 |
| 卷号 | 20期号:1页码:104-110 |
| 关键词 | Freundlich equation sorption coefficients sorption isotherms |
| ISSN号 | 1002-0160 |
| 通讯作者 | Gao Hong-Jian(hjgao@ahau.edu.cn) |
| 英文摘要 | Adsorption and desorption are important. processes that influence the transport, transformation, and bioavailability of hexachlorobenzene (HCB) in soils. To examine the adsorption-desorption characteristics of HCB, equilibrium batch experiments were carried out using two soils (red soil and paddy soil) with different initial HCB concentrations (0.25, 0.50, 0.75, 1.00, 1.50, 2.50, 3.50, and 5.00 mg L(-1)) by using 0.01 mol L(-1) calcium chloride as the background solution. The successive desorption experiments (48, 96: 1441 192, and 240 h) were conducted after each adsorption equilibrium experiment. The results revealed that adsorption and desorption isotherms of HCB on two soils were nonlinear. which can be best described by the Freundlich equation with the square of the correlation coefficient (r(2)) ranging from 0.97 to 0.99. Desorption of HCB from the two soils exhibited hysteresis at all HCB concentrations because the Freundlich desorption coefficients were always higher than the Freundlich adsorption coefficients. The hysteretic effect was enhanced with increasing initial HCB concentration, and positive hysteresis was observed at different concentrations. |
| 收录类别 | SCI |
| WOS关键词 | HYDROPHOBIC ORGANIC CONTAMINANTS ; DISTRIBUTED REACTIVITY MODEL ; ATRAZINE DESORPTION ; SLOW SORPTION ; SEDIMENTS ; MATTER ; PENTACHLOROPHENOL ; ENVIRONMENT ; CHEMICALS ; BEHAVIOR |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000274052900013 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558812 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Gao Hong-Jian |
| 作者单位 | 1.Anhui Agr Univ, Sch Resources & Environm Sci, Hefei 230036, Peoples R China 2.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao Hong-Jian,Jiang Xin. Effect of Initial Concentration on Adsorption-Desorption Characteristics and Desorption Hysteresis of Hexachlorobenzene in Soils[J]. PEDOSPHERE,2010,20(1):104-110. |
| APA | Gao Hong-Jian,&Jiang Xin.(2010).Effect of Initial Concentration on Adsorption-Desorption Characteristics and Desorption Hysteresis of Hexachlorobenzene in Soils.PEDOSPHERE,20(1),104-110. |
| MLA | Gao Hong-Jian,et al."Effect of Initial Concentration on Adsorption-Desorption Characteristics and Desorption Hysteresis of Hexachlorobenzene in Soils".PEDOSPHERE 20.1(2010):104-110. |
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来源：南京土壤研究所
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