黄原胶/瓜尔胶提高微米铁的稳定性及去除锑性能的研究

王亚军; 蔡丽娟

doi:10.13205/j.hjgc.202308006

黄原胶/瓜尔胶提高微米铁的稳定性及去除锑性能的研究

doi: 10.13205/j.hjgc.202308006

王亚军^1,2, ,,
蔡丽娟¹

1. 兰州理工大学土木工程学院, 兰州 730050;
2. 兰州理工大学西部土木工程防灾减灾教育部工程研究中心, 兰州 730050

基金项目:

国家自然科学基金项目(52160003)

甘肃省科技计划项目(20JR10RA145)

中央引导地方科技发展资金项目(甘财科[2021]51号)

详细信息

作者简介:
王亚军(1979-),男,博士,教授,主要研究方向为水污染治理。wyj79626@lut.edu.cn

通讯作者:
王亚军(1979-),男,博士,教授,主要研究方向为水污染治理。wyj79626@lut.edu.cn

计量
- 文章访问数: 79
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-21
- 网络出版日期: 2023-11-15

ENHANCEMENT OF STABILITY AND ANTIMONY REMOVAL PERFORMANCE OF mZVI BY XANTHAN GUM AND GUAR GUM

WANG Yajun^{1,2
, ,},
CAI Lijuan¹

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Education, Lanzhou University of Technology, Lanzhou 730050, China

摘要

摘要: 为了克服微米铁mZVI的结构团聚性低问题,提高mZVI对地下水锑的原位修复效果,采用黄原胶(XG)和瓜尔胶(GG)改性剂以一定比例改性,进行mZVI、mZVI-活性炭AC、XG/GG-mZVI和XG/GG-mZVI-AC 4种材料的对照试验,通过沉降试验评价4种材料的稳定性和黏性,选择Sb作为目标污染物,探究4种材料对Sb的去除性能。试验结果表明:在投加XG∶GG(摩尔比)为4∶1、3∶2、1∶1、3∶2和1∶4时,相较mZVI和mZVI-AC,XG/GG-mZVI和XG/GG-mZVI-AC稳定性显著提升,相对分光光度值均在90%以上,随着XG/GG比例增高,其稳定性随之提升;在改性剂浓度为3.00 g/L,投加浓度比为4∶1条件下,XG/GG-mZVI黏度测试结果最高;去除试验显示XG/GG-mZVI对锑的去除率最高,可达到67.13%。XG和GG混合改性剂的投加提高了mZVI的稳定性和反应活性,混合改性剂投加质量浓度越大,改性剂缓冲作用越明显。
- 微米铁 /
- 黄原胶 /
- 瓜尔胶 /
- 稳定性 /
- 锑去除
Abstract: In order to solve the problem of low structural agglomeration of micron iron mZVI and improve the in-situ remediation effect of mZVI in the remediation of groundwater antimony wastewater, Xanthan gum (XG) and guar gum (GG) modifiers were used to modify mZVI in a certain proportion, and contrast tests of mZVI, mZVI-activated carbon (AC), XG/GG mZVI and XG/GG mZVI-AC were carried out. The stability and viscosity of the four materials were evaluated through sedimentation tests, and antimony was selected as the target pollutant, to explore the removal performance of four materials for antimony. The experimental results illustrated that when the dosage ratio of XG and GG was 4∶1, 3∶2, 1∶1, 3∶2, 1∶4, compared with mZVI and mZVI-AC, the stability of XG/GG-mZVI and XG/GG-mZVI-AC was significantly improved, and the relative spectrophotometric values were all above 90%. As the ratio of XG/GG increase, its stability increased; when the concentration of the modifier was 3.00 g/L, the ratio was 4∶1, the viscosity test result of XG/GG-mZVI was the highest; the removal experiment showed that XG/GG-mZVI has the highest removal rate on antimony, reaching 67.13%. The stability and reactivity of mZVI were improved by the addition of XG and GG, and the buffering effect of the modifier was more obvious when the concentration of the modifier increased.
- micron iron /
- xanthan gum /
- guar gum /
- stability /
- antimony removal

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