| Constructed wetland treatment of source separated washing wastewater in rural areas of southern China | |
Li, Yahui; Zhu, Shikun; Zhang, Yu ; Lv, Minghuan; Kinhoun, Jean Joel Roland; Qian, Tingting; Fan, Bin
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| 2021-12-01 | |
| Source Publication | SEPARATION AND PURIFICATION TECHNOLOGY
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| ISSN | 0045-6535 |
| Volume | 281Pages:- |
| Abstract | Three types of hierarchically porous magnetic biochars (HMBs) were prepared by pymlyzing low-cost wheat straw and potassium ferrate (K2FeO4) under a nitrogen atmosphere at 600, 700 and 800 degrees C, respectively, which could be used as amendments for cadmium (Cd) in water and soil. HMB fabricated at 700 degrees C (HMB700) had the best remediation performance for Cd in water and soil, which was mainly due to its largest specific surface area and micropore volume. Batch sorption experiments showed that Cd(II) sorption onto HMBs were well-described by a pseudo-second-order model and Sips (Freundlich-Langmuir) model, indicating that HMBs removed Cd(II) mainly through chemical adsorption. MINTEQ modeling evidenced that HMBs adsorbed Cd(II) mainly through precipitation rather than surface complexation. The adsorption behavior of HMB700 to Cd(II) could be explained by surface complexation (-OCd, -COOCd), precipitation (Cd(OH)(2) and CdCO3), physical adsorption (rich pore structure) and ion exchange (K+, Ca2+, Mg2+). Furthermore, adding HMBs (1 wt%) (incubation 60 days) could also significantly increase soil pH and electrical conductivity (EC), and significantly reduce the available Cd content in soil (47.97%-61.38%). Adding HMBs could promote the conversion of bioavailable to less bioavailable Cd forms. These results provided a new idea for fabricating agricultural waste-based HMBs to remediate Cd in water and soil. |
| Department | 环境水质学国家重点实验室 |
| Keyword | Wheat straw Potassium ferrate Hierarchically porous magnetic biochar Cadmium Water and soil remediation |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/46843 |
| Collection | 环境水质学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Yahui,Zhu, Shikun,Zhang, Yu,et al. Constructed wetland treatment of source separated washing wastewater in rural areas of southern China[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,281:-. |
| APA | Li, Yahui.,Zhu, Shikun.,Zhang, Yu.,Lv, Minghuan.,Kinhoun, Jean Joel Roland.,...&Fan, Bin.(2021).Constructed wetland treatment of source separated washing wastewater in rural areas of southern China.SEPARATION AND PURIFICATION TECHNOLOGY,281,-. |
| MLA | Li, Yahui,et al."Constructed wetland treatment of source separated washing wastewater in rural areas of southern China".SEPARATION AND PURIFICATION TECHNOLOGY 281(2021):-. |
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| Constructed wetland （2467KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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