摘要
研究了不同浓度磷酸改性凹凸棒粘土的比表面积、孔结构性质以及其对水中Pb(Ⅱ)的吸附。结果表明,凹凸棒粘土磷酸改性后比表面积明显增大,具有明显的中孔分布;9 mol/L磷酸改性处理的凹凸棒粘土吸附能力最佳,在改性凹凸棒粘土加入量为20~30 g/L,水样pH=5条件下,废水中Pb(Ⅱ)的被吸附率接近99%。
The pore structures and surface area of the H3PO4 modified attapulgite were investigated by nitrogenad sorption. Furthermore, adsorption of Pb^2＋ on activated attapulgite was systematically studied. The resuits showed that the H3PO4 modified attapulgite had obvious meso-porous distribution and larger surface area. The optimal absorption condition was the attapulgite treated in 9 mol/L H3PO4. The modified attapulgite used in Pb-containing wastewater treatment was with nearly 99% of absoption rate. The optimal technological conditions were 20 ～ 30 g/L attapulgite addition, sample pH = 5, with 20 min contacting.
出处
《环境污染治理技术与设备》
CSCD
北大核心
2006年第5期31-34,共4页
Techniques and Equipment for Environmental Pollution Control
基金
江苏省高校自然科学研究基金资助项目(03KJD150052)
淮阴师范学院青年教师基金资助项目(05HSQN056)
关键词
凹凸棒粘土
改性
含铅废水
吸附
attapulgite
modification
Pb-containing wastewater
adsorption
