Geo-environmental and mechanical behaviors of As(V) and Cd(II) co-contaminated soils stabilized by goethite nanoparticles modified biochar
文献类型：期刊论文
| 作者 | Feng, Chen1,3,4; Li, Jiangshan2,3,4; Jiang, Wenhao1,3,4; Liu, Jindu1,3,4; Xue, Qiang3,4
|
| 刊名 | BIOCHAR
 |
| 出版日期 | 2023-09-04 |
| 卷号 | 5期号:1页码:15 |
| 关键词 | Arsenic Cadmium Co-contaminated soils Goethite nanoparticles modified biochar Stabilization TOPSIS method |
| ISSN号 | 2524-7972 |
| DOI | 10.1007/s42773-023-00253-7 |
| 英文摘要 | Goethite nanoparticles modified biochar (FBC) could address the weak effectiveness of conventional biochar commonly to process heavy metal(loids) (HMs) co-contamination with different charges. However, few studies have focused on the change of soil mechanical properties after stabilization. In this study, FBC was synthesized to stabilize simultaneously arsenic (As (V)) (anions) and cadmium (Cd (II)) (cations) in co-contaminated soils. Batch adsorption, leaching toxicity, geotechnical properties and micro-spectroscopic tests were comprehensively adopted to investigate the stabilization mechanism. The results showed that FBC could immobilize As (V) mainly through redox and surface precipitation while stabilizing Cd (II) by electrostatic attraction and complexation, causing soil agglomeration and ultimately making rougher surface and stronger sliding friction of contaminated soils. The maximum adsorption capacity of FBC for As (V) and Cd (II) was 31.96 mg g-1 and 129.31 mg g-1, respectively. Besides, the dosages of FBC required in contaminated soils generally were approximately 57% higher than those in contaminated water. FBC promoted the formation of small macroaggregates (0.25-2 mm) and the shear strengths of co-contaminated soils by 21.40% and 8.34%, respectively. Furthermore, the soil reutilization level was significantly improved from 0.14-0.46 to 0.76-0.83 after FBC stabilization according to TOPSIS method (i.e., technique for order preference by similarity to an ideal solution). These findings confirm the potential of FBC in immobilizing As (V) and Cd (II) of co-contaminated soils and provide a useful reference for green stabilization and remediation of HMs co-contaminated sites. Goethite nanoparticles modified biochar (FBC) can make up the shortcoming of conventional biochar to immobilize simultaneously arsenic (As (V)) and cadmium (Cd (II)) in co-contaminated soils.FBC is conducive to the formation of the soil small macroaggregates (i.e., 0.25-2 mm).FBC promotes soil shear strengths of As (V) and Cd (II) co-contaminated soils by increasing internal friction. |
| 资助项目 | The authors appreciate the financial support from the National Key Research and Development Program, China (Grant No. 2019YFC1804002), the National Natural Science Foundation of China (Grant No.42177163) and the CAS Pioneer Hundred Talents Program in China[42177163] ; National Key Research and Development Program, China ; National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program in China ; [2019YFC1804002] |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001057501200001 |
| 出版者 | SPRINGER SINGAPORE PTE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39334]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiangshan; Xue, Qiang |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Hubei Prov Key Lab Contaminated Sludge & Soil Sci, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Chen,Li, Jiangshan,Jiang, Wenhao,et al. Geo-environmental and mechanical behaviors of As(V) and Cd(II) co-contaminated soils stabilized by goethite nanoparticles modified biochar[J]. BIOCHAR,2023,5(1):15. |
| APA | Feng, Chen,Li, Jiangshan,Jiang, Wenhao,Liu, Jindu,&Xue, Qiang.(2023).Geo-environmental and mechanical behaviors of As(V) and Cd(II) co-contaminated soils stabilized by goethite nanoparticles modified biochar.BIOCHAR,5(1),15. |
| MLA | Feng, Chen,et al."Geo-environmental and mechanical behaviors of As(V) and Cd(II) co-contaminated soils stabilized by goethite nanoparticles modified biochar".BIOCHAR 5.1(2023):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。