通过电凝-基于煤炭的粉状活性炭工艺进行液处理:效率,机制,动力学和成本
1Civil Engineering Department, Munzur University, Tunceli, Turkey.
概括
这项研究表明,将电凝 (EC) 与以煤为基础的粉末活性炭 (CBPAC) 结合起来,可以显著提高化学氧气需求 (COD),氨 (NH3-N) 和液度的消除. 与单独EC相比,EC-CBPAC联合工艺实现了更高的去除效率.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 吸附过程 吸附过程
背景情况:
- 由于高度的污染物,如化学氧气需求 (COD),氨- (NH3-N) 和度,液对环境构成重大风险.
- 传统的处理方法可能不足以进行全面的液净化.
- 综合工艺为提高污染物清除效率提供了潜力.
研究的目的:
- 调查单反应器集成电凝 (EC) 和基于煤炭的粉状活性炭 (CBPAC) 工艺用于处理宾格尔液的有效性.
- 优化实验条件,包括剂量,pH值和反应时间,以最大限度地去除污染物.
- 为了比较集成EC-CBPAC流程与独立EC流程的性能.
主要方法:
- 使用一个单一的反应器,使用不钢阴极和阳极进行电凝.
- 使用煤炭粉状活性炭 (CBPAC) 作为吸附剂与EC.一起使用.
- 多样化的实验参数,如CBPAC剂量 (5g/L),pH值 (COD/度为5,NH3-N为9.5),反应时间 (40分钟).
- 分析了含有COD,NH3-N和处理前后度的液特性.
- 使用Brunauer-Emmett-Teller (BET) 表面积分析进行CBPAC的特征.
主要成果:
- 集成的EC-CBPAC过程实现了最佳的去除效率,COD为92%,NH3-N为40%,度为91%.
- 与单独EC相比,EC-CBPAC表现出明显更高的去除效率:COD为20%,NH3-N为19%,度为38%.
- 该过程遵循COD和度的伪第一阶 (PFO) 动力学,以及NH3-N的伪第二阶 (PSO),具有高相关系数 (R2 0.94-0.99).
- 在处理过程后,CBPAC表面积和孔积显著减少,这表明污染物吸附.
结论:
- 集成的EC-CBPAC工艺在去除COD,NH3-N和液中的度方面非常有效,其性能优于独立的EC方法.
- 优化的条件 (pH 5 对于COD/度,pH 9.5 对于NH3-N,5 g/L CBPAC,40 分钟) 产生更高的去除率.
- 该研究强调了EC和CBPAC在提高液处理效率方面的协同作用.
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