title: Removal of phenol from aqueous solution by adsorption onto OTMAC-modified attapulgite.
abstract: The potential of octodecyl trimethyl ammonium chloride (OTMAC)-modified attapulgite (AT) for phenol adsorption from aqueous solutions was studied. The comparison of natural AT and modified AT showed that it is possible to utilize the sonication-modified OTMAC-AT in the treatment of phenol-contaminated wastewaters. Batch sorption studies were carried out to evaluate the effect of contact time, shaking frequency, temperature and the amount of AT. The results showed that in a lab-scale reactor, at room temperature, with an amount of the modified AT added (2.5 g), and a shaking frequency of 140 rev/min, the adsorption rate of phenol could be 60.4% for a duration of 60 min. The sorption kinetics were described by a pseudo-second-order model, and the values of k and q(e) were 1.367 mg/ig min and 0.7901 ig/mg, respectively. The analysis of equilibrium data showed that the Freundlich isotherms were found to be applicable for the adsorption equilibrium data. K and 1/n were estimated to be 14.53 and 0.8438, respectively.
authors.affiliation: The Key Laboratory of Food Science and Safety, Ministry of Education, Southern Yangtze University, Wuxi, Jiangsu Province, China.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Huang
authors.forename: Xingguo
authors.initials: X
authors.lastname: Wang
authors.forename: Qingzhe
authors.initials: Q
authors.lastname: Jin
authors.forename: Yuanfa
authors.initials: Y
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D007700:Kinetics; D017616:Magnesium Compounds / Q000737:chemistry*; D010636:Phenols / Q000302:isolation & purification*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry*; D013696:Temperature; D014465:Ultrasonics; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D017616:Magnesium Compounds; D010636:Phenols; D000644:Quaternary Ammonium Compounds; D017655:Silicon Compounds; D014874:Water Pollutants, Chemical; C512885:octadecyltrimethylammonium; C026325:attapulgite