The sedimentation capabilities of hexadecyltrimethylammonium-modified montmorillonites.
Natural montmorillonite was modified with a quaternary ammonium compound, hexadecyltrimethylammonium (HDTMA). The sedimentation capabilities of unmodified and modified montmorillonites were then investigated. The sedimentation velocity of modified montmorillonites increased if the amounts of adsorbed HDTMA were from 0.3 to 1.0 times the cation exchange capacitity (CEC). It also emerged that the sedimentation capability of modified montmorillonites was improved and that the variously CEC-modified montmorillonites had similar sedimentation capabilities after they had sorbed organic matter from oily wastewater. Thus, modified montmorillonites (especially 0.5 CEC treatment) had good sedimentation capabilities for sorbing organic substance and can act as carriers in wastewater biotreatment.
Yang
Liuyan
L
State Key Laboratory of Pollution and Resource Reuse, School of the Environment, Nanjing University, China. yangliuy@public1.ptt.js.cn
Jiang
Lijuan
L
Zhou
Zhi
Z
Chen
Yuangao
Y
Wang
Xiaorong
X
D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D001673:Biodegradation, Environmental; D006838:Hydrocarbons; D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D006838:Hydrocarbons; D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds; D001546:Bentonite