Stabilization and strengthening of chromium(VI)-contaminated soil via magnesium ascorbyl phosphate (MAP) and phytase addition
文献类型：期刊论文
| 作者 | Han, Lijun1,2,4; Li, Jiangshan1,3; Fei, Xunchang1,4,5; Wang, Mengqi6; Liu, Shiyu6; Zhang, Xianwei6; Xue, Qiang1,3
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
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| 出版日期 | 2023-04-15 |
| 卷号 | 448期号:-页码:- |
| 关键词 | Cr(VI) reduction Magnesium ascorbyl phosphate (MAP) Phytase Soil strengthening |
| ISSN号 | 0304-3894 |
| 英文摘要 | Cr(VI) contamination of soil threatens the environment and reduces soil strength. Therefore, both Cr(VI) stabilization and soil reinforcement should be considered in site remediation for future construction. This study investigated a biochemical treatment process using magnesium ascorbyl phosphate (MAP) and phytase. MAP was hydrolyzed via phytase catalysis to produce ascorbic acid (AA) and MgHPO4 center dot 3H(2)O precipitation. The AA reduced Cr(VI) into low-toxic Cr(III), which precipitated as Cr(OH)(3) and CrPO4. More than 90% of the 500 mg/kg Cr(VI) in soil was reduced by 5% MAP (wt% of soil) and 1% phytase (vol/vol of soil water) doses at the geotechnically optimal soil moisture content of 16.8%. The MgHPO4 center dot 3H(2)O precipitates filled soil pores and enhanced the unconfined compression strength of treated soil by more than two times. This research reports a novel and practical enzymatically induced phosphate precipitation process for the remediation of Cr(VI)-contaminated soil. |
| 学科主题 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000963525300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35508]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.University of Chinese Academy of Science, Beijing 100049, China 3.IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China 4.School of Civil and Environmental Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore 5.Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, 1 Cleantech Loop, 637141, Singapore 6.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China |
| 推荐引用方式 GB/T 7714 | Han, Lijun,Li, Jiangshan,Fei, Xunchang,et al. Stabilization and strengthening of chromium(VI)-contaminated soil via magnesium ascorbyl phosphate (MAP) and phytase addition[J]. JOURNAL OF HAZARDOUS MATERIALS,2023,448(-):-. |
| APA | Han, Lijun.,Li, Jiangshan.,Fei, Xunchang.,Wang, Mengqi.,Liu, Shiyu.,...&Xue, Qiang.(2023).Stabilization and strengthening of chromium(VI)-contaminated soil via magnesium ascorbyl phosphate (MAP) and phytase addition.JOURNAL OF HAZARDOUS MATERIALS,448(-),-. |
| MLA | Han, Lijun,et al."Stabilization and strengthening of chromium(VI)-contaminated soil via magnesium ascorbyl phosphate (MAP) and phytase addition".JOURNAL OF HAZARDOUS MATERIALS 448.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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