摘要
研究了酸改性粉煤灰、经十六烷基三甲基溴化铵（CTMAB）改性处理后的钠基膨润土及其二者的复合材料在处理含Cr（Ⅵ）废水中的应用。研究表明,将经4mol/L硫酸常温25℃浸泡7d改性得到的粉煤灰和经CTMAB（质量分数8%）改性后的钠基膨润土按质量比3∶1混合压片制得的复合材料,兼有吸附效果好且价格低廉的优点,为优选吸附材料;并重点考察了溶液初始pH值、复合材料用量、吸附时间和吸附温度对这种复合材料吸附去除水中Cr（Ⅵ）的影响,确定了最优化的吸附条件,即在pH=1~6,用10g/L复合材料吸附5mg/L Cr（Ⅵ）,时间60min,Cr（Ⅵ）的去除率可达92%以上,水中剩余质量浓度为0.35mg/L,达到《污水综合排放标准（GB 8978—1996）》的要求。
The acid-modified fly ash,cetyl trimethyl ammonium bromide（CTMAB）-modified bentonite and their composites were applied as adsorbents to wastewater with Cr（Ⅵ）.Results showed that,in terms of economy and removal effect,the composite made by mixing fly ash modified with 4mol/L H2SO4（25℃,7d）and sodium bentonite modified with CTMAB（mass fraction 8%）as mass ratio 3∶1was the optimized adsorbent.Based on this composite adsorbent,the initial pH value of water,the dosage of adsorbent,adsorption time and adsorption temperature were investigated and optimized.Results showed that,at pH=1~6,and 60 min adsorption to 5mg/L Cr（Ⅵ）,the removal efficiency for this composite（10g/L）could reach to 93%and the remaining concentration of Cr（Ⅵ）was 0.35 mg/L,meeting the requirement of Integrated Wastewater Discharge Standard（GB 8978-1996）.
出处
《太原理工大学学报》
CAS
北大核心
2014年第5期674-678,共5页
Journal of Taiyuan University of Technology
基金
山西省青年科技研究基金资助项目(2013021011-3)
山西省留学人员科研基金资助项目(2013-04)
太原理工大学校青年基金资助项目(2012L029)
太原理工大学人才引进资助项目(tyut-rc201110a)
