Treatment of nitrobenzene wastewater with bio-diesel

In the process of nitrobenzene,one of the maximal pollutant source is the washing wastewater including nitrobenzene.The condition of extracting nitrobenzene in the wastewater with bio-diesel was studied by orthogonal experimental method.The result showed that the order of the influence are as followed:preliminary contentpHthe ratio of solvent to wastewater(S/F)temperature.In the optimal condition of 20℃,pH = 5.4,S/F=1/1,the concentration of nitrobenzene was decreased to 6.43 mg·L~(-1),and the removed ratio of that in the wastewater was up to 99.68%through five-stage cross current extraction.