Mangrulkar Priti A, Kamble Sanjay P, Meshram J, Rayalu Sadhana S
Environmental Materials Unit, National Environmental Engineering Research Institute (CSIR), Nagpur 440 020, India.
J Hazard Mater. 2008 Dec 30;160(2-3):414-21. doi: 10.1016/j.jhazmat.2008.03.013. Epub 2008 Mar 12.
Water pollution by toxic organic compounds is of concern and the demand for effective adsorbents for the removal of toxic compounds is increasing. Present work deals with the adsorption of phenol (PhOH) and o-chlorophenol (o-CP) on mesoporous MCM-41 material. The effect of surfactant template in MCM-41 on the removal of PhOH and o-CP was investigated. The comparison of adsorption of PhOH and o-CP on uncalcined MCM-41 (noted as MCM-41) and calcined MCM-41 (noted as C-MCM-41) was investigated. It was found that MCM-41 shows significant adsorption for PhOH and o-CP as compared to C-MCM-41, this may be because of the hydrophobicity created by surfactant template in the MCM-41. Batch adsorption studies were carried out to study the effect of various parameters like adsorbent dose, pH, initial concentration and the presence of co-existing ions. It was found that adsorption of PhOH and o-CP depends upon the solution pH as well as co-existing ions present in the aqueous solution. The equilibrium adsorption data for PhOH and o-CP was analyzed by using Freundlich adsorption isotherm model. From the sorption studies it was observed that the uptake of o-CP was higher than PhOH.
有毒有机化合物造成的水污染令人担忧，对用于去除有毒化合物的有效吸附剂的需求也在不断增加。目前的工作涉及苯酚（PhOH）和邻氯苯酚（o-CP）在介孔MCM-41材料上的吸附。研究了MCM-41中表面活性剂模板对PhOH和o-CP去除效果的影响。研究了PhOH和o-CP在未煅烧的MCM-41（记为MCM-41）和煅烧的MCM-41（记为C-MCM-41）上的吸附情况。结果发现，与C-MCM-41相比，MCM-41对PhOH和o-CP表现出显著的吸附作用，这可能是由于MCM-41中表面活性剂模板产生的疏水性。进行了批量吸附研究，以考察吸附剂用量、pH值、初始浓度和共存离子的存在等各种参数的影响。结果发现，PhOH和o-CP的吸附取决于溶液的pH值以及水溶液中存在的共存离子。采用Freundlich吸附等温线模型对PhOH和o-CP的平衡吸附数据进行了分析。从吸附研究中观察到，o-CP的吸附量高于PhOH。
