Yilmaz A Erdem, Boncukcuoğlu Recep, Kocakerim M Muhtar
Atatürk University, Faculty of Engineering, Department of Environmental Engineering, 25240 Erzurum, Turkey.
J Hazard Mater. 2007 Oct 22;149(2):475-81. doi: 10.1016/j.jhazmat.2007.04.018. Epub 2007 Apr 8.
This paper provides a quantitative comparison of electrocoagulation and chemical coagulation approaches based on boron removal. Electrocoagulation process delivers the coagulant in situ as the sacrificial anode corrodes, due to a fixed current density, while the simultaneous evolution of hydrogen at the cathode allows for pollutant removal by flotation. By comparison, conventional chemical coagulation typically adds a salt of the coagulant, with settling providing the primary pollutant removal path. Chemical coagulation was carried out via jar tests using aluminum chloride. Comparison was done with the same amount of coagulant between electrocoagulation and chemical coagulation processes. Boron removal obtained was higher with electrocoagulation process. In addition, it was seen that chemical coagulation has any effect for boron removal from boron-containing solution. At optimum conditions (e.g. pH 8.0 and aluminum dose of 7.45 g/L), boron removal efficiencies for electrocoagulation and chemical coagulation were 94.0% and 24.0%, respectively.
本文基于硼去除对电凝聚和化学凝聚方法进行了定量比较。由于固定电流密度，当牺牲阳极腐蚀时，电凝聚过程原位产生凝聚剂，而阴极同时析出氢气可通过浮选去除污染物。相比之下，传统化学凝聚通常添加凝聚剂的盐，沉降是去除主要污染物的途径。使用氯化铝通过烧杯试验进行化学凝聚。在电凝聚和化学凝聚过程中使用相同量的凝聚剂进行比较。电凝聚过程获得的硼去除率更高。此外，还发现化学凝聚对从含硼溶液中去除硼没有任何效果。在最佳条件下（例如pH 8.0和铝剂量为7.45 g/L），电凝聚和化学凝聚的硼去除效率分别为94.0%和24.0%。
