复合改性粉煤灰处理含镍废水的工艺优化
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摘要
为提高粉煤灰对废水中Ni~(2+)的吸附能力,本研究对粉煤灰进行复合改性,制备得到M-B-A·S-FA。通过L_9(3~4)正交优化实验,确定了复合改性粉煤灰吸附含镍废水的较优的工艺条件。结果表明,粉煤灰投加量为4g、pH值为8、吸附时间为40min、吸附温度为30℃时,Ni~(2+)的去除率达到99.1%。该工艺操作简单,去除率高,具有良好的经济效益和社会效益。
In order to improve the adsorption capacity of fly ash for Ni~(2+) in wastewater, the composite modification of fly ash was studied, and M-B-A·S-FA was obtained. Through L_9(3~4) orthogonal optimization test, the optimum technological conditions of composite modified fly ash adsorbing nickel-containing wastewater were determined. The results showed that the removal rate of Ni~(2+) could reach 99.1% when the dosage of fly ash was 4 g, the pH value was 8, the adsorption time was 40 min and the adsorption temperature was 30℃.
In order to improve the adsorption capacity of fly ash for Ni~(2+) in wastewater, the composite modification of fly ash was studied, and M-B-A·S-FA was obtained. Through L_9(3~4) orthogonal optimization test, the optimum technological conditions of composite modified fly ash adsorbing nickel-containing wastewater were determined. The results showed that the removal rate of Ni~(2+) could reach 99.1% when the dosage of fly ash was 4 g, the pH value was 8, the adsorption time was 40 min and the adsorption temperature was 30℃.
引文
[1]李蕊，郭丽敏，王素娥.复合改性粉煤灰处理含镍电镀废水的研究[J].电镀与环保，2019,39(1):69-71.
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[4]伍昌年，凌琪，唐玉朝，等.微波辅助酸改性粉煤灰对镉的吸附性能研究[J].应用化工，2016,45(8):1428-1430.
[5]应成璋，黄雪芬，蒙敏，等.应用复合改性粉煤灰吸附尾矿浸出液中的Zn[J].环境工程学报，2016,10(9):5152-5158.
[2]吴小东.混合改性粉煤灰对电镀废水中低浓度Ni2+的去除研究[D].杭州：浙江大学，2015.
[3]闫惠.利用粉煤灰制备沸石分子筛及其处理含镉、镍重金属废水的应用研究[D].南京：南京理工大学，2013.
[4]伍昌年，凌琪，唐玉朝，等.微波辅助酸改性粉煤灰对镉的吸附性能研究[J].应用化工，2016,45(8):1428-1430.
[5]应成璋，黄雪芬，蒙敏，等.应用复合改性粉煤灰吸附尾矿浸出液中的Zn[J].环境工程学报，2016,10(9):5152-5158.