Performance and mechanisms of thermally treated bentonite for enhanced phosphate removal from wastewater
文献类型：期刊论文
| 作者 | Xie, Guixian; Chen, Xiang; Wu, Lu; Liu, Feng ; Luo, Pei; Zhuang, Xuliang; Wu, Jinshui; Zhu, Zhenke; Xu, Shengjun
|
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 25期号:16页码:15980-15989 |
| 关键词 | Thermal treatment Bentonite Adsorption Phosphate Wastewater |
| ISSN号 | 0944-1344 |
| 文献子类 | Article |
| 英文摘要 | Optimization of clays as adsorbent for low concentration phosphorus removal from wastewater has received increasing attention in recent years. This study explored the feasibility of using bentonite as an adsorbent for phosphate (P) removal from synthetic wastewater, by assessing the performance of thermally treated bentonite for P removal and elucidating the mechanisms of P adsorption. Natural bentonite (B25) was thermally treated at 100-1000 degrees C (B100-B1000) for 2 h. Physical and chemical properties were measured by the SEM, XRD, pore size distribution, EDX, and cation exchange capacity (CEC) methods. Thermal treatment increased P sorption capacity of bentonite and that B800 had a higher P sorption capacity (6.94 mg/g) than B25 (0.237 mg/g) and B400 (0.483 mg/g) using the Langmuir isotherm equation. Study of sorption kinetics indicated that B800 rapidly removed 94% of P from a 10 mg P/L solution and the pseudo-second-order equation fitted the data well. The Ca2+ release capacity of B800 (1.31 mg/g) was significantly higher than that of B25 (0.29 mg/g) and B400 (0.40 mg/g) (p < 0.05). The initial pH level had a smaller impact on P removal efficiency for B800 than that of B25 and B400. Ca-P was the main fraction of P adsorbed onto B800, and Ca-10-P was the main species (41.4%). The main factors affecting the phosphorous adsorption capacity of B800 were changed crystal structure, strong calcium release capacity, and improved stability in different pH solutions. The results demonstrated that thermally treated bentonite (B800) has the potential to be an efficient adsorbent for removal of low-concentration phosphorus from wastewater. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41286]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Xie, Guixian,Chen, Xiang,Wu, Lu,et al. Performance and mechanisms of thermally treated bentonite for enhanced phosphate removal from wastewater[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2018,25(16):15980-15989. |
| APA | Xie, Guixian.,Chen, Xiang.,Wu, Lu.,Liu, Feng.,Luo, Pei.,...&Xu, Shengjun.(2018).Performance and mechanisms of thermally treated bentonite for enhanced phosphate removal from wastewater.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,25(16),15980-15989. |
| MLA | Xie, Guixian,et al."Performance and mechanisms of thermally treated bentonite for enhanced phosphate removal from wastewater".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 25.16(2018):15980-15989. |
入库方式： OAI收割
来源：生态环境研究中心
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