垃圾焚烧飞灰中重金属的传统与生物电沉积联用技术研究

为了探究深圳市城市生活垃圾焚烧飞灰中主要重金属含量和浸出浓度,选择浸出浓度超标的Cu(Ⅱ)(100mg/L),Pb(Ⅱ)(200mg/L)和Zn(Ⅱ)(300mg/L)作为研究对象,联合生物电化学系统(BES)和传统电沉积反应器(ER),验证从飞灰浸出溶液中分离回收Cu,Pb和Zn的可行性和经济性.研究结果表明,BES能有效地将混合溶液中的Cu(Ⅱ)还原为单质,去除效率大于98％.分步施加1.5 V和2.5 V外加电压,ER可以分别将Pb(Ⅱ)和Zn(Ⅱ)浓度由200和300 mg/L降至23.5±1.1和4.3±0.2 mg/L.系统能耗分析结果显示,BES系统每还原1kg Cu(Ⅱ),可以...

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Published in北京大学学报（自然科学版） Vol. 58; no. 4; pp. 673 - 679
Main Authors 冯振东, 雷涛, 张善发, 张丽娟, 丁凌云, 陶虎春
Format Journal Article
LanguageChinese
Published 深圳市重金属污染控制与资源化重点实验室,北京大学深圳研究生院环境与能源学院,深圳518055 20.07.2022
Subjects
生物电化学系统
电沉积反应器
垃圾飞灰
重金属
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Abstract 为了探究深圳市城市生活垃圾焚烧飞灰中主要重金属含量和浸出浓度,选择浸出浓度超标的Cu(Ⅱ)(100mg/L),Pb(Ⅱ)(200mg/L)和Zn(Ⅱ)(300mg/L)作为研究对象,联合生物电化学系统(BES)和传统电沉积反应器(ER),验证从飞灰浸出溶液中分离回收Cu,Pb和Zn的可行性和经济性.研究结果表明,BES能有效地将混合溶液中的Cu(Ⅱ)还原为单质,去除效率大于98％.分步施加1.5 V和2.5 V外加电压,ER可以分别将Pb(Ⅱ)和Zn(Ⅱ)浓度由200和300 mg/L降至23.5±1.1和4.3±0.2 mg/L.系统能耗分析结果显示,BES系统每还原1kg Cu(Ⅱ),可以产生16.55 kWh的额外电能,ER系统每处理1 kg Pb(Ⅱ)和Zn(Ⅱ),分别消耗60.91和114.27 kWh的电能,溶解性重金属离子被转化为固态单质、氧化物和含重金属盐等.BES和ER联用技术表现出回收重金属和节约电能的双重优势.
AbstractList 为了探究深圳市城市生活垃圾焚烧飞灰中主要重金属含量和浸出浓度,选择浸出浓度超标的Cu(Ⅱ)(100mg/L),Pb(Ⅱ)(200mg/L)和Zn(Ⅱ)(300mg/L)作为研究对象,联合生物电化学系统(BES)和传统电沉积反应器(ER),验证从飞灰浸出溶液中分离回收Cu,Pb和Zn的可行性和经济性.研究结果表明,BES能有效地将混合溶液中的Cu(Ⅱ)还原为单质,去除效率大于98％.分步施加1.5 V和2.5 V外加电压,ER可以分别将Pb(Ⅱ)和Zn(Ⅱ)浓度由200和300 mg/L降至23.5±1.1和4.3±0.2 mg/L.系统能耗分析结果显示,BES系统每还原1kg Cu(Ⅱ),可以产生16.55 kWh的额外电能,ER系统每处理1 kg Pb(Ⅱ)和Zn(Ⅱ),分别消耗60.91和114.27 kWh的电能,溶解性重金属离子被转化为固态单质、氧化物和含重金属盐等.BES和ER联用技术表现出回收重金属和节约电能的双重优势.
Author 陶虎春
丁凌云
冯振东
张善发
张丽娟
雷涛
AuthorAffiliation 深圳市重金属污染控制与资源化重点实验室,北京大学深圳研究生院环境与能源学院,深圳518055
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ZHANG Lijuan
FENG Zhendong
ZHANG Shanfa
DING Lingyun
LEI Tao
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Keywords 生物电化学系统
电沉积反应器
垃圾飞灰
重金属
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