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。
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,p H 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.
出处
《环境工程》
CAS
CSCD
北大核心
2015年第10期1-4,20,共5页
Environmental Engineering
基金
"十二五"环境领域国家科技支撑计划课题(2014BAC09B01-02)
电力与交通材料保护湖南省重点实验室(长沙理工大学)开放基金(2010CL03)
关键词
粉煤灰
硫铁矿渣
六价铬
吸附
改性
fly ash
pyrite cinder
hexavalent chromium
adsorption
modified
作者简介
王琼（1979-），女，硕士，讲师，主要研究方向为水污染控制、工业水处理。7570534@qq．com
