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| MgO改性生物质电厂灰对Cd2+的去除性能研究 |
| Study on Removal Performance of MgO Modified Biofuel Ash on Cd 2+ |
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| DOI： |
| 中文关键词: 镉污染 生物质电厂灰 氧化镁改性 钝化修复 |
| 英文关键词: Cadmium pollution Biofuel ash Magnesium oxide modification Passivation remediation |
| 基金项目:国家重点研发计划基金资助项目（2023YFC3709904）；河南省地质研究院2024年度地质科技攻关基金资助项目（2024-906-XM08） |
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| 摘要点击次数: 141 |
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| 中文摘要: |
| 以固体废弃物生物质电厂灰（BFA）为基底原料，通过研磨负载轻烧氧化镁（MgO）的方式制备得到MgO改性生物质电厂灰基复合修复剂（BFAMg）。通过室内批量吸附试验，系统分析不同添加量MgO制备的BFAMg对水中Cd2+的吸附性能、作用机制及环境适配性。试验表明：MgO改性可有效优化BFA的孔隙结构，显著提升材料对Cd2+的沉淀、固定效应；最优条件下制备的BFAMg对水中Cd2+的最大吸附量可达4250 mg/g，是BFA的502倍。BFAMg具备良好的酸碱缓冲性能，既有效解决了纯MgO应用过程中液相pH值过高的问题，又可抑制体系中Mg2+的过量溶出。 |
| 英文摘要: |
| Using biofuel ash（BFA） from solid waste as the base material，MgO modified biofuel ash based composite remediation agent（BFAMg） was prepared by grinding and loading with light burned magnesium oxide（MgO）. 〖JP〗Batch adsorption experiments were conducted to systematically investigate the Cd2+ adsorption performance， interaction mechanisms， and environmental adaptability of BFAMg prepared with varying MgO addition levels. The results showed that MgO modification effectively optimized the pore structure of BFA and significantly enhanced its precipitation and immobilization effects on Cd2+. Under optimal preparation conditions， the maximum Cd2+ adsorption capacity of BFAMg reached 4250 mg/g， which was 502 times that of raw BFA. Furthermore， 〖JP〗BFAMg exhibited favorable acid base buffering capacity， which not only effectively mitigated the excessively high liquid phase pH value 〖GK!87mm〗caused by the application of pure MgO， but also suppressed the excessive leaching of Mg2+ from the system. |
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