| 不同化学还原体系下铬污染土壤的处理效率 |
| |
| 引用本文： | 杨放, 陈倩, 毛志强, 郭淼, 熊振, 秦佳, 王建刚, 王兴润. 不同化学还原体系下铬污染土壤的处理效率[J]. 环境工程学报, 2017, 11(6): 3832-3838. doi: 10.12030/j.cjee.201604024 |
| |
| 作者姓名： | 杨放 陈倩 毛志强 郭淼 熊振 秦佳 王建刚 王兴润 |
| |
| 作者单位： | 1. 四川省地质工程勘察院, 成都 610072; 2. 四川省地矿局成都水文队, 成都 610072; 3. 中国环境科学研究院, 北京 100012 |
| |
| 基金项目： | 国家环保公益性行业科研专项（201309020） 四川省土壤环境调查与评估体系研究项目（ZY20150490SC） |
| |
| 摘 要： | 以某场地两种典型铬污染土壤（Soil A和Soil B）为研究对象，探讨了不同药剂对土壤Cr6+的还原效果以及洗脱效果。结果表明，Na2S较FeSO4对土壤中Cr6+有更好的还原效果，还原率和总还原效率均可大于99%；具体工艺参数为：Na2S添加倍数5倍且pH值5~7。FeSO4和Na2S对Cr6+均有很好的洗脱效果，可将两种土壤洗脱液中Cr6+还原完全（未检出）；具体工艺参数：FeSO4添加倍数5倍且pH值5~7或者Na2S添加倍数5倍且pH值5。综合考虑还原和洗脱效果，最优的工艺参数为Na2S添加倍数5倍且pH值5。通过经济性分析，处理1 t污染土壤Soil A和Soil B的药品费用分别为3.55元和59.52元。
|
| 关 键 词： | 六价铬 土壤修复 污染场地 还原稳定 |
| 收稿时间： | 2016-06-22 |
Remediation efficiency of chromium contaminated soil under different redox systems |
| |
| YANG Fang, CHEN Qian, MAO Zhiqiang, GUO Miao, XIONG Zhen, QIN Jia, WANG Jiangang, WANG Xingrun. Remediation efficiency of chromium contaminated soil under different redox systems[J]. Chinese Journal of Environmental Engineering, 2017, 11(6): 3832-3838. doi: 10.12030/j.cjee.201604024 |
| |
| Authors: | YANG Fang CHEN Qian MAO Zhiqiang GUO Miao XIONG Zhen QIN Jia WANG Jiangang WANG Xingrun |
| |
| Affiliation: | 1. Sichuan Institute of Geological Engineering Investigation, Chengdu 610072, China; 2. Chengdu Hydrogeological and Engineering Geological Team, Chengdu 610072, China; 3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
| |
| Abstract: | Two different types of chromium slag-contaminated soil (soil A and soil B treatments) were selected as test samples for the investigation of Cr6+ removal and the elution efficiencies of typical stabilization agents.The main findings are as follows:The hexavalent chromium reduction efficiency of Na2S was better than that of FeSO4.The Cr6+ removal rate and total reduction efficiency of Na2S exceeded 99% in both soil treatments.Meanwhile, the proper quantity of additional Na2S was five times the theoretical quantity, and the pH was 5~7.The elution efficiency was good for both Na2S and FeSO4.The Cr6+ of the eluent was almost completely reduced by both soil treatments (not detected).The proper quantity of additional FeSO4 was five times the theoretical quantity, and the pH was 5~7.Moreover, the proper quantity of Na2S was also five times the theoretical quantity, with a pH of 5.In terms of removal and elution efficiencies, the optimal parameter was an Na2S quantity five times that of the theoretical quantity, with a pH of 5~7.From an economic analysis, the costs of treatment for one ton of contaminated soils A and B were determined to be RMB 3.55 and 59.52 Yuan, respectively. |
| |
| Keywords: | hexavalent chromium soil remediation contaminated sites reductive stabilization |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境工程学报》浏览原始摘要信息 |
|
点击此处可从《环境工程学报》下载全文 |
|
