超声辅助烷基糖苷去除电解锰渣中金属离子
Removal of metal ions from electrolytic manganese residue by ultrasound-assisted alkyl polyglycoside leaching
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摘要: 以电解锰渣为研究对象，采用淋洗法研究超声辅助非离子型表面活性剂烷基糖苷（APG）对电解锰渣中有害金属的去除效果，为矿渣的无害化处理提供理论基础。水浴振荡实验中探究了反应时间、pH、APG浓度及转速对金属离子去除率的影响，超声辅助水浴振荡实验中优化了超声时间及超声功率2个条件，并用BCR连续提取法对表面活性剂处理前后矿渣中金属的存在形态进行分析。结果表明，在超声功率为450 W、超声时间为40 min的辅助处理下，当淋洗液pH 为5.0，APG浓度为80 g?L-1，转速为180 r?min-1，处理24 h后电解锰渣中Mn、Cd、Co和Ni的去除率分别可达85.17%、78.29%、68.25%和71.34%。且比较表面活性剂处理前后电解锰渣中金属赋存形态发现，APG对不同形态的金属离子的去除能力存在差异，其中以弱酸提取态和可还原态重金属的去除效果最为明显。通过分析可知超声辅助烷基糖苷洗脱是一种有效的电解锰渣中金属离子无害化处理技术，具有环境、经济的双重效益。Abstract: In this study, the ultrasound-assisted nonionic surfactant alkyl polyglycoside leaching was used to remove the harmful metal ions from electrolytic manganese residue and provide a theoretical basis for harmless treatment of slag. The effects of reaction time, pH, APG concentration and rotating speed on the removal rate of metal ions were investigated with water bath oscillation experiments, and the ultrasonic duration and power was optimized with the ultrasound-assisted water bath oscillation experiments. In addition, the BCR continuous extraction was taken for the species analysis of metal ions in the residue before and after surfactant leaching. The results showed that the removal efficiencies of Mn, Cd, Co and Ni were 85.17%, 78.29%, 68.25% and 71.34%, respectively after 24h leaching treatment at leacheate pH of 5.0, APG concentration of 80 g?L-1 and the rotate speed of 180 r? min-1, as well as 450 W and 40 min ultrasound auxiliary treatment. In comparison of the species of metal ions before and after surfactant leaching, there was a difference in the removal ability for the metal ions with different species by APG, and higher removal efficiencies were found for the weak acid extracted and reducible species of the metal ions. This study shows that ultrasound-assisted alkyl glycoside leaching is an effective and harmless treatment technology for metal ions in electrolytic manganese residue, which has simultaneous environmental and economic benefits.
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Key words:
- electrolytic manganese residue /
- alkyl glycoside /
- ultrasound-assisted /
- metal ions /
- harmless treatment
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[1] 吴建锋, 宋谋胜, 徐晓红, 等. 电解锰渣的综合利用进展与研究展望[J]. 环境工程学报,2014,8(7):2645-2652 [2] 凌辉, 谢水波, 唐振平, 等. 重金属污染土壤的修复方法及其在几类典型土壤修复中的应用[J]. 四川环境,2013,31(1):118-122 [3] 叶茂, 杨兴伦, 魏海江, 等. 持久性有机污染场地土壤淋洗法修复研究进展[J]. 土壤学报,2012,49(4):803-814 [4] 高国龙, 张望, 周连碧, 等. 重金属污染土壤化学淋洗技术进展[J]. 有色金属工程,2013,3(1):49-52 [5] PAULO J C, JOAO P M, ELISA P G, et al.Selective chemical extraction of heavymetals in tailings and soils contaminated by mining activity:Environmental implications[J].Journal of Geochemical Exploration,2011,12(3):190-171 [6] TORRES L G, LOPEZ R B, BELTRAN M, et al.Removal of As, Cd, Cu, Ni, Pb, and Zn from a highly contaminated industrial soil using surfactant enhanced soil washing[J].Physics and Chemistry of the Earth,2012,37(39):30-36 [7] SLIZOVSKIY I B, KELSEY J W, HATZINGER P B, et al.Surfactant-facilitated remediation of metal-contaminated soils:Efficacy and toxicological consequences to earthworms[J].Environmental Toxicology and Chemistry,2011,30:112-123 [8] SWARNKAR V, AGRAWL N, TOMAR R, et al.Sorption of chromate and arsenate by surfactant modified erionite[J].Journal of Dispersion Science and Technology,2012,33:919-927 [9] 刘霞, 王建涛, 张萌, 等. 螯合剂和生物表面活性剂对Cu、Pb污染塿土的淋洗修复[J]. 环境科学,2013,34(4):1590-1597 [10] 朱清清, 劭超英, 张琢, 等. 生物表面活性剂皂角苷增效去除土壤中重金属的研究[J]. 环境科学学报,2010,30(12):2491-2498 [11] 中华人民共和国农业部. 土壤环境检测第2部分:土壤pH的测定:NY/T 1121.2-2006[S].北京: 中国环境科学出版社,2006 [12] 徐玉霞, 汪庆华, 薛雷, 等. 关中西部某铅锌冶炼区表层土壤重金属污染的分布规律[J]. 土壤通报,2013,44(5):1240-1244 [13] 国家环境保护局, 国家技术监督局.土壤环境质量标准:GB 15618-1995[S].北京: 中国环境科学出版社,1995 [14] 国家环境保护局, 国家技术监督局.危险废物鉴别标准 毒性物质含量鉴别:GB 5085.6-2007[S].北京: 中国环境科学出版社,2007 [15] KEIVAN N, BAKAR N K, RADZI B A, et al.Speciation of heavy metals by modified BCR sequential extraction procedure in different depths of sediments from Sungai Buloh, Selangor, Malaysia[J].Journal of Hazardous Materials,2011,192(1):402-410 [16] 朱清清. 表面活性剂对土壤中重金属污染的去除研究[D]. 上海:东华大学,2011 [17] 朱清清, 劭超英, 候书雅, 等. 烷基糖苷对土壤中重金属的去除研究[J]. 环境科学与技术,2011,34(8):120-123 [18] 董艳丽,高立娣,谷信晨, 等. 超声辅助生物表面活性剂去除污泥中的重金属[J]. 化工时刊,2015,29(7):14-17 [19] 涂剑成, 赵庆良, 杨倩倩. 超声辐射协同草酸-HEDTA浸提污泥中重金属[J]. 中国环境科学,2011,31(8):1280-1284 [20] 吴阳东, 张嫔, 黄智源,等. 超声波辅助进去分离污泥中的重金属[J]. 环境科学与技术,2013,36(4):109-113 [21] 邱琼瑶, 周航, 邓贵友, 等. 污染土壤中重金属的超声波强化EDTA 洗脱及形态变化[J].环境科学学报,2014,34(9):2392-2397 -
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