title: Application of acid modified polyurethane foam surface for detection and removing of organochlorine pesticides from wastewater.
abstract: The commercial polyurethane foam was acid modified to get an inexpensive adsorbent (AM-PUF) has highly surface polarity and sorption capacity. The elemental analysis, scanning electron microscopy, thermal analysis, ultraviolet/visible/infrared spectroscopies and X-ray diffraction were used for characterization of AM-PUF. The surface of AM-PUF has amorphous character (broadband at 2θ, 21.75°) and contains several active sites e.g. NH, OH, CO, CC and COC groups. The electrical conductivity (σ), iodine value and methylene blue index of AM-PUF are 1.7×10-5Ω-1m-1, 208mg/g and 107mg/g. The AM-PUF has a high efficiency for completely removing (99-100%) of Aldrin, DDT, Endrin, Heptachlor, Heptachlor epoxide and Lindane pesticides in both acidic and alkaline solutions. The removing rates of the organochlorine pesticides from wastewater are very rapid (t1/2=22s). The negative value of ΔG (-10.9kJ/mol) for removing of OCPs using AM-PUF showed that the feasibility of the removing process and its spontaneous nature.
authors.affiliation: Chemistry Department, Faculty of Science, Damietta University, Damietta, Egypt. Electronic address: eamoawed@yahoo.com.
authors.forename: E A
authors.initials: EA
authors.lastname: Moawed
authors.affiliation: Chemistry Department, General Organization for Egypt Water Supply, Banha, Egypt.
authors.forename: A M
authors.initials: AM
authors.lastname: Radwan
mesh_terms: D006843:Hydrocarbons, Chlorinated / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D057230:Limit of Detection; D016014:Linear Models; D008422:Materials Testing; D010573:Pesticide Residues / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D011140:Polyurethanes / Q000737:chemistry*; D015203:Reproducibility of Results; D013499:Surface Properties; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D011140:Polyurethanes; D014874:Water Pollutants, Chemical; C028279:polyurethane foam
keywords: Acid modified polyurethane foam; Detection; Drain agricultural wastewater; Nile River; Organochlorine pesticides; Removal