| 柠檬酸及柠檬酸铵电场强化水洗脱除垃圾焚烧飞灰中重金属 |
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| 引用本文： | 邓毅, 李淑媛, 王继钦, 田洋, 易小霞, 王蓉, 杨飞华, 王肇嘉, 舒建成, 孙峙, 陈梦君. 柠檬酸及柠檬酸铵电场强化水洗脱除垃圾焚烧飞灰中重金属[J]. 环境工程学报, 2021, 15(4): 1451-1457. doi: 10.12030/j.cjee.202009066 |
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| 作者姓名： | 邓毅 李淑媛 王继钦 田洋 易小霞 王蓉 杨飞华 王肇嘉 舒建成 孙峙 陈梦君 |
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| 作者单位： | 1.生态环境部固体废物与化学品管理技术中心，北京 100000; 2.西南科技大学固体废物处理与资源化教育部重点实验室，绵阳 621010; 3.西南科技大学国防科技学院，绵阳 621010; 4.固废资源化利用与节能建材国家重点实验室，北京 100041; 5.中国科学院过程工程研究所，北京 100190 |
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| 基金项目： | 国家自然科学基金;固废资源化利用与节能建材国家重点实验室开放基金 |
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| 摘 要： | 为进一步强化城市生活垃圾焚烧飞灰中重金属电场水洗脱除效果,详细研究柠檬酸和柠檬酸铵强化洗脱效果,分析了初始pH、辅助剂浓度和电流密度对飞灰中重金属去除率的影响,探讨了处理后飞灰的浸出毒性.结果表明,柠檬酸和柠檬酸铵辅助剂的电场强化水洗均能显著去除飞灰中重金属,且去除率随着初始pH的减少、辅助剂浓度的增加和电流密度的增加...
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| 关 键 词： | 城市生活垃圾 焚烧飞灰 重金属 电场强化水洗 |
| 收稿时间： | 2020-09-09 |
Heavy metals removal from municipal solid waste incineration fly ashes by electric field enhanced washing with citric acid/ammonium citrate |
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| DENY Yi, LI Shuyuan, WANG Jiqin, TIAN Yang, YI Xiaoxia, WANG Rong, YANG Feihua, WANG Zhaojia, SHU Jiancheng, SUN Zhi, CHEN Mengjun. Heavy metals removal from municipal solid waste incineration fly ashes by electric field enhanced washing with citric acid/ammonium citrate[J]. Chinese Journal of Environmental Engineering, 2021, 15(4): 1451-1457. doi: 10.12030/j.cjee.202009066 |
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| Authors: | DENY Yi LI Shuyuan WANG Jiqin TIAN Yang YI Xiaoxia WANG Rong YANG Feihua WANG Zhaojia SHU Jiancheng SUN Zhi CHEN Mengjun |
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| Affiliation: | 1.Solid Waste and Chemical Management Technology Center of the Ministry of Ecological Environment, Beijing 100000, China; 2.Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China; 3.School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China; 4.State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing 100041, China; 5.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Citric acid and ammonium citrate were applied to further enhance the removal of heavy metals from municipal solid waste incineration fly ashes by electric washing. The effects of initial pH, auxiliary agent concentration and current density on the removal rate of heavy metals from fly ash were studied, and the leaching risk of treated fly ash was discussed. These results indicate that both citric acid and ammonium citrate aided electric enhanced washing could significantly remove heavy metals from fly ashes, and the removal rate increases with the decrease of initial pH and the increase of auxiliary agent concentration and current density. At optimum conditions, with the addition of citric acid auxiliary agent, the removal rates of Pb, Cd and Ni in the fly ash are all higher than 90%, while the removal rates of Zn, Cu and As are 83.12%, 72.68% and 71.86% respectively. When ammonium citrate is used as an auxiliary agent, the removal rates of Cd, Cu, Ni, Zn, As and Pb removal rates are 91.51%, 88.18%, 86.43%, 77.94%, 69.57% and 69.07%, respectively. The fly ash treated with the two auxiliary agents has no leaching toxicity since their leaching concentrations either could not be detected or at an extremely lower level. The results provide references for electric field washing removal and enhancement of heavy metals in fly ash. |
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| Keywords: | municipal solid waste incineration fly ashes heavy metals electric field enhanced washing |
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