沉淀-吸附综合法去除废水汞的研究

摘要

Taking the waste of the grapefruit skin as the raw material, the Hg2+ removal efficiency and the best experimental conditions of the ZnCl2 modified by Na2 S were studied. Experimental results showed that at pH 9, sodium sulfide dosage was 0. 36 g/mL, while adding flocculant under FeSO4 conditions, the removal rate of the removal rate of the wastewater by the comprehensive method of the sulfide and the modified grapefruit peel was 96%, the average content of mercury in the end of the waste water was 0. 0378 mg/L, met the national 0. 05 mg/L emission standards.%以废弃的柚子皮为原料,研究ZnCl2改性后的柚子皮对经过Na2 S沉淀法处理后废水Hg2+去除率以及最佳实验条件。实验结果表明,在pH为9,硫化钠加入量为0.36 g/mL,同时加入絮凝剂FeSO4条件下,硫化物-改性柚子皮综合法去除废水汞实验的去除率达到96%以上,终末废水汞的含量平均为0.0378 mg/L,达到国家0.05 mg/L的排放标准。