title: The sedimentation capabilities of hexadecyltrimethylammonium-modified montmorillonites.
abstract: 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.
authors.affiliation: State Key Laboratory of Pollution and Resource Reuse, School of the Environment, Nanjing University, China. yangliuy@public1.ptt.js.cn
authors.forename: Liuyan
authors.initials: L
authors.lastname: Yang
authors.forename: Lijuan
authors.initials: L
authors.lastname: Jiang
authors.forename: Zhi
authors.initials: Z
authors.lastname: Zhou
authors.forename: Yuangao
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Wang
mesh_terms: 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*
chemical_list: D006838:Hydrocarbons; D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds; D001546:Bentonite