自制活性炭分离PCBs与OCPs的活化方法研究
首发时间:2009-06-15
摘要:建立了一种自制活性炭分离PCBs与OCPs的活化方法。通过对酸洗浓度、碱洗浓度、活化温度、活化时间和流动相配比五因素四水平L16(45)正交实验研究,得到16种OCPs和10种PCBs分离效果的最优实验条件:酸洗浓度3mol/L、碱洗浓度2mol/L、活化温度550℃、活化时间1.5h、流动相为30mL丙酮+10mL(丙酮:二氯甲烷=95:5,v/v)。结果显示,OCPs的回收率在88.55%~102.63%之间,PCBs的回收率在9.52%~12.49%之间,OCPs的纯度达到了91.59%。
关键词: 活性炭 活化 正交试验 有机氯农药 多氯联苯 分离
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Separation of Organochlorine Pesticides and Polychlorinated Biphenyls by Self-made Column of Activated Carbon
Abstract:A method for separation of organochlorine pesticides and polychlorinated biphenyls by self-made column of activated carbon had been established. The condition of separating for sixteen kinds of OCPs and ten kinds of PCBs were optimized by orthogonal experimental design of five factor-four levels for concentration of acid, concentration of alkali, activation temperature, activation time and types of eluting reagents. The results were showed that the optimization of separating between sixteen kinds of OCPs and ten kinds of PCBs adsorbed in activated carbon with eluting of 30mL acetone and 10mL mix solution of acetone and dichloromethane and (95:5, v/v) in turn could be obtained in the conditions of activated carbon soaking in 3mol/L of acid turn and turn about 2mol/L of alkali, heating at 550℃ for 1.5 hours. The results were indicated the recoveries of OCPs and PCBs ranged from 88.55% to 102.63%, from 9.52% to 12.49%, respectively, and the purity of OCPs equaled to 91.59%.
Keywords: activated carbon activation orthogonal experiment OCPs PCBs separation
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