粉煤灰掺杂硫铁矿渣改性物吸附处理含铬废水
doi: 10.13205/j.hjgc.201510001
ADSORPTION OF HEXAVALENT CHROMIUM IN WASTEWATER BY MODIFIED FLY ASH DOPING PYRITE CINDER FLY ASH DOPING PYRITE CINDER WASTEWATER/WASTE TREATMENT
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摘要: 以粉煤灰为主要原料,通过在粉煤灰中掺杂硫铁矿渣并加盐酸进行改性,将该复合改性产物用于吸附去除废水中的六价铬。该复合改性产物的制备条件为灰渣比10∶1,盐酸质量分数30%,在加热沸腾的状态下改性1 h。当水中Cr6+质量浓度为5 mg/L,p H值为6,吸附剂投加量为40 g/L,吸附反应温度为10℃的条件下,吸附反应1 h后达到平衡,吸附效率为97%以上。该吸附反应符合Langmuir等温方程和Freundlich等温方程,是物理吸附和化学吸附协同作用的结果。研究表明:该复合改性法去除水中的六价铬成本低廉,操作简单,适合处理低浓度含铬废水,有利于固体废弃物的资源化利用。Abstract: Modified the mixing fly ash and pyrite cinder by hydrochloric acid,and the compound modified product was applied to adsorb the hexavalent chromium in waste water. The preparation conditions of the composite modified product were: Ash ratio is 10∶ 1,the concentration of hydrochloric acid was 30%,modified time was 1 h in the boiling state. When the hexavalent chromium concentration was 5 mg /L,pH was 6,and the adsorbent dosage was 40 g /L,the adsorption reaction temperature was 10 ℃, the adsorption reaction reached balance after 1 h with the adsorption efficiency of more than 97%. This adsorption reaction conformed to Langmuir isothermal equation and Freundlich isothermal equation,which was synergistic reaction of physical adsorption and chemical adsorption. Research showed that the compound modification method was low-cost and easilyoperated and was suitable to dispose chromium-containing wastewater at a low concentration,contributing to the resource utilization of solid waste.
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Key words:
- fly ash /
- pyrite cinder /
- hexavalent chromium /
- adsorption /
- modified
期刊类型引用(4)
1. 邵俊,郭丰艳,王志林,吴楠,朱丽君. 改性咖啡渣对水中Cr(Ⅵ)的吸附性能. 离子交换与吸附. 2019(02): 131-140 . 百度学术
2. 陈君丽. 铁板电絮凝联合活性炭吸附处理含铬电镀废水的研究. 电镀与环保. 2018(02): 59-61 . 百度学术
3. 宋磊,陈众,浦玉炳,程峻峰,高文乔,张艾星. 改性粉煤灰的沉淀与吸附协同作用去除水体中磷研究. 环境工程. 2016(12): 1-5 . 本站查看
4. 张纲. 钢渣—赤泥复合处理含铬废水的研究. 科技创新与生产力. 2016(04): 72-74 . 百度学术
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