通过低温热化学方法对电解残留进行无害处理的研究
Zhihan Xie1,2, Rongjin Liu3,4,5,6, Fuhua Lu1,2
1College of Material Science and Engineering, Guilin University of Technology, Guilin, 541004, China.
概括
本研究介绍了一种低温热化学方法,用于处理电解残留物 (EMR). 该过程有效地固化可溶 (Mn2+) 并去除氨离子 (NH4+-N),提供一个环保的解决方案.
科学领域:
- 环境化学环境化学
- 废物管理 废物管理
- 无机化学 无机化学
背景情况:
- 电解残留物 (EMR) 含有危险污染物,如离子 (NH4+-N) 和可溶 (Mn2+).
- 这些污染物对生态环境构成重大风险,需要有效的处理方法.
- 目前的处理方法可能不高效或不环保.
研究的目的:
- 开发一种准确,高效和无害的EMR治疗方法.
- 为了研究EMR的低温热化学处理.
- 优化固化和从EMR中去除氨的条件.
主要方法:
- 使用直角实验设计来研究关键参数的影响.
- 研究的反应温度,反应时间, (CaO),碳酸 (Na2CO3),酸 (Na3PO4) 和水消耗.
- 分析了Mn2+作为氧化,碳酸或酸的固化,以及NH4+-N的去除.
主要成果:
- 确定了最佳条件:60°C的反应温度,10分钟的反应时间,10%的CaO,1%的Na2CO3,0.5%的Na3PO4和80%的水消耗.
- 实现了98.5%的氨离子去除率和99.9%的可溶性Mn2+固化率.
- 对氨去除的影响顺序被确定为CaO>水消耗>Na3PO4>Na2CO3.
结论:
- 提出的低温热化学方法对治疗EMR有效.
- 这种方法提供了高效的固化和氨的去除.
- 为EMR处置提供了一个新的,低成本和环保的流程.
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