Insights into the attenuated sorption of organic compounds on black carbon aged in soil
文献类型：期刊论文
| 作者 | Luo, Lei; Lv, Jitao; Chen, Zien; Huang, Rixiang; Zhang, Shuzhen |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2017-11-15 |
| 卷号 | 231期号:0页码:1469-1476 |
| 关键词 | Biochar Sorption Surface Functionality Surface Porosity Organic Compound |
| 英文摘要 | Sorption of organic compounds on fresh black carbons (BCs) can be greatly attenuated in soil over time. We examined herein the changes in surface properties of maize straw-derived BCs (biochars) after aged in a black soil and their effects on the sorptive behaviors of naphthalene, phenanthrene and 1,3-dinitrobenzene. Dissolved fulvic and humic acids extracted from the soil were used to explore the role of dissolved organic carbon (DOC) in the aging of biochars. Chromatography analysis indicated that DOC molecules with relatively large molecular weight were preferentially adsorbed on the biochars during the aging processes. DOC sorption led to blockage of the biochar's micropores according to N-2 and CO2 adsorption analyses. Surface chemistry of the biochars was also substantially modified, with more O-rich functional groups on the aged biochars compared to the original biochars, as evidenced by Near-edge Xray absorption fine structure (NEXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS) analyses. The changes in both the physical and chemical surface properties of biochars by DOC led to significant attenuation of the sorption capacity and nonlinearity of the nonionic organic compounds on the aged biochars. Among the tested organic compounds, phenanthrene was the most attenuated in its sorption by the aging treatments, possibly because of its relatively large molecular size and hydrophobicity. The information can help gain a mechanistic understanding of interactions between BCs and organic compounds in soil environment. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39341]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Luo, Lei,Lv, Jitao,Chen, Zien,et al. Insights into the attenuated sorption of organic compounds on black carbon aged in soil[J]. ENVIRONMENTAL POLLUTION,2017,231(0):1469-1476. |
| APA | Luo, Lei,Lv, Jitao,Chen, Zien,Huang, Rixiang,&Zhang, Shuzhen.(2017).Insights into the attenuated sorption of organic compounds on black carbon aged in soil.ENVIRONMENTAL POLLUTION,231(0),1469-1476. |
| MLA | Luo, Lei,et al."Insights into the attenuated sorption of organic compounds on black carbon aged in soil".ENVIRONMENTAL POLLUTION 231.0(2017):1469-1476. |
入库方式： OAI收割
来源：生态环境研究中心
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