[1]史晓英,陈静,白冰.EICP技术联合生物炭修复重金属铅污染土研究[J].水利与建筑工程学报,2025,(02):213-220.[doi:10.3969/j.issn.1672-1144.2025.02.029]
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EICP技术联合生物炭修复重金属铅污染土研究(
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《水利与建筑工程学报》[ISSN:1672-1144/CN:61-1404/TV]
- 卷:
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- 期数:
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2025年02期
- 页码:
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213-220
- 栏目:
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- 出版日期:
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2025-04-30
文章信息/Info
- 作者:
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史晓英1; 陈静2; 白冰2
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1.烟台职业学院建筑工程系,山东烟台264670;2.北京交通大学土木建筑工程学院,北京100044
- 关键词:
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脲酶诱导碳酸钙沉淀技术; 脲酶; 生物炭; 修复; 协同固化
- 分类号:
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X505
- DOI:
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10.3969/j.issn.1672-1144.2025.02.029
- 文献标志码:
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A
- 摘要:
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针对工业废料中重金属铅污染土壤的问题,采用脲酶诱导碳酸钙沉淀技术(enzymeinducedcar-bonateprecipitation,EICP)联合生物炭修复铅污染土壤。结果表明:当尿素浓度低于1.0mol/L时,脲酶活性随温度升高而增强,且在pH值为7时达到最大值;而脲酶质量浓度超过60g/L时,由于溶解度限制,脲酶提取效率下降;最佳反应条件为尿素浓度1.0mol/L,脲酶质量浓度60g/L,反应温度20℃,pH值为7。EICP技术联合生物炭(5wt%)修复铅污染土时,土壤结构更加密实,固化土的抗压强度较单一EICP处理提高了26.34%,Pb2+浸出浓度低于5mg/L,符合国家标准限值。脲酶诱导碳酸钙沉淀、胶结及吸附Pb2+实现固化效果,生物炭为脲酶提供了更多成核位点,并通过吸附或离子交换有效固定土壤中游离Pb2+。这一联合修复技术为铅污染土壤提供了高效且可行的解决方案。
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备注/Memo
- 备注/Memo:
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收稿日期:2024-11-03 修稿日期:2025-01-07
基金项目:北京市自然科学基金(8222023)
作者简介:史晓英(1986—),女,硕士,讲师,主要从事土木工程与建筑管理等方面工作。E-mail:407035088@qq.co
更新日期/Last Update:
1900-01-01