期刊论文

Adsorption behavior of red mud ceramsite to Cu~(2+) from simulated acidic wastewater

Luo, L.

中文

环境工程学报

1673-9108

2016

10

5

2440-2446

10.12030/j.cjee.201412214

环境保护部行业公益基金项目（201309051）；

本校为第一且通讯机构

矿山酸性废水中重金属污染较普遍,利用赤泥陶粒对模拟酸性废水中的Cu~(2+)进行净化处理。实验结果表明,当pH值为3、温度为30 ℃、Cu~(2+)初始浓度为150 mg/L、陶粒添加量为20 g/L、吸附时间为4 h时,Cu~(2+)的去除率达到95.06%。陶粒对Cu~(2+)的吸附符合准二级动力学模型,相关系数为0.998 3,饱和吸附量为7.412 9 mg/g;等温吸附模型中更符合Langmuir等温吸附模型,相关系数为0.993 3。处理废水后的陶粒用硫酸-硝酸浸提,浸出液中重金属离子浓度均低于国家浸出毒性标准,表明陶粒是一种很好的酸性废水处理剂。吸附饱和的陶粒用1 mol/L的NaOH溶液再生效果好。实验结果表明,陶粒对Cu~(2+)的吸附过程是物...

Heavy metal pollution is relatively common in acidic mining wastewater. This study used red mud ceramsite to treat the copper (Cu2+) in the simulated acid wastewater. The results demonstrated that the removal rate of Cu2+ reached 95.06% at a pH of 3, a temperature of 30℃, an initial concentration of Cu2+ of 150 mg/L, a ceramsite quantity of 20 g/L, and an adsorption time of 4 h. Sorption kinetics of Cu2+ on ceramsite followed the quasi-second order kinetic model, the correlation coefficient was 0.9983, and the value of maximum adsorption capac...