title: Accumulation of organochlorine pesticides by semipermeable membrane devices using composite complex.
abstract: Semipermeable membrane devices (SPMDs) were developed for passive in situ monitoring of organochlorine pesticides (OCPs) in aqueous solution in both laboratory and field (Pearl River Delta, China) studies. The device consisted of a thin film of neutral lipid triolein, enclosed in thin-walled tubing made of composite cellulose acetate membrane (CA) supported by linear low density polyethylene (LLDPE) (CAPE). Results from the laboratory and field application indicated that triolein-CAPE (TCAPE) could quickly and efficiently accumulate hydrophobic OCPs in water and uptake equilibrium could reached within 20h in the laboratory. Some mathematical relationships of TCAPE-water partition coefficient (logK(sw)), triolein-water partition coefficient (logK(tw)) and octanol-water partition coefficient (logK(ow)) were developed under the laboratory conditions. A good correlation of accumulation in TCAPE with r(2) values ranging from 0.55 to 0.86 for individual OCPs (n=8) and an excellent correlation of logK(sw) and logK(ow) was also obtained under the field conditions. The average OCPs concentration in the surface water could be estimated by measuring OCPs concentration in the device under the field conditions.
authors.affiliation: State Key Laboratory Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. lbliao03@126.com
authors.forename: Long B
authors.initials: LB
authors.lastname: Liao
authors.forename: Xian M
authors.initials: XM
authors.lastname: Xiao
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000737:chemistry; D008567:Membranes, Artificial; D008956:Models, Chemical; D010539:Permeability; D010573:Pesticide Residues / Q000032:analysis* / Q000737:chemistry; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D008567:Membranes, Artificial; D010573:Pesticide Residues; D014874:Water Pollutants, Chemical