Unraveling sorption of lead in aqueous solutions by chemically modified biochar derived from coconut fiber: A microscopic and spectroscopic investigation
文献类型：期刊论文
| 作者 | Zheng LR(郑黎荣) ; Yuan, GD; Li, JW; Chu, YC; Zheng, LR; Xu, S; Chen, X; Wang, HL; Niazi, NK; Muller, K
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2017 |
| 卷号 | 576页码:766-774 |
| 关键词 | Heavy metal Biochar Chemical modification XAFS SEM-EDX |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2016.10.163 |
| 文献子类 | Article |
| 英文摘要 | In this study, we examined the efficacy of nine different types of coconut-fiber derived biochars (CFBs), prepared at different temperatures and chemically modified with ammonia, hydrogen peroxide and nitric acid, to remove lead. (Pb2+) from aqueous solutions. Langmuir-q(m) values of the biochars pyrolyzed at 300 degrees C and modified with ammonia and nitric acid increased from 49.5 to 105.5 and 85.2 mg g(-1), respectively, compared to control (unmodified), whereas hydrogen peroxide treatment had no effect. The maximum amount of Pb adsorbed on biochars was in the order of CFB-700 > MCFB-300-NH3. H2O > CFB-500 > MCFB-300-HNO3 > CFB-300. X-ray absorption fine structure (XAFS) spectroscopy results revealed that Pb-montmorillonite, Pb(C2H3O2)(2), PbSO4, Pb-Al2O3 and Pb-3(PO4)(2) were the five most important Pb species observed in Pb-loaded biochars, and as such, favoring Pb immobilization in aqueous solutions. Overall, the sorption capacity of CFBs pyrolyzed at 300 degrees C substantially increased for Pb2+ with ammonia and nitric acid modification. However, these chemical modifications did not improve the sorption of Pb on CFBs pyrolyzed at temperatures >= 500 degrees C, thereby highlighting a temperature dependent response of chemically modified biochars to Pb sorption in this study. (C) 2016 Elsevier B.V. All rights reserved. |
| 电子版国际标准刊号 | 1879-1026 |
| WOS关键词 | HEAVY-METALS ; XAFS SPECTROSCOPY ; SOIL ; ADSORPTION ; REMOVAL ; IMMOBILIZATION ; GASES ; CHARS ; WATER ; RICE |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000390964700072 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285105]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_实验物理中心 中国科学院高能物理研究所_中国散裂中子源 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zheng LR,Yuan, GD,Li, JW,et al. Unraveling sorption of lead in aqueous solutions by chemically modified biochar derived from coconut fiber: A microscopic and spectroscopic investigation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,576:766-774. |
| APA | 郑黎荣.,Yuan, GD.,Li, JW.,Chu, YC.,Zheng, LR.,...&Wu, WD.(2017).Unraveling sorption of lead in aqueous solutions by chemically modified biochar derived from coconut fiber: A microscopic and spectroscopic investigation.SCIENCE OF THE TOTAL ENVIRONMENT,576,766-774. |
| MLA | 郑黎荣,et al."Unraveling sorption of lead in aqueous solutions by chemically modified biochar derived from coconut fiber: A microscopic and spectroscopic investigation".SCIENCE OF THE TOTAL ENVIRONMENT 576(2017):766-774. |
入库方式： OAI收割
来源：高能物理研究所
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