摘要
比较不同炭吸附材料:木炭、竹炭、改性木炭和改性竹炭对溶液中汞(Ⅱ)的吸附性能。研究了pH值、吸附剂用量、吸附平衡时间等因素对吸附量的影响。动力学研究表明:它们对汞(Ⅱ)的吸附均可用准一级动力学方程描述;并测定不同炭对汞(Ⅱ)吸附的表观速率常数。研究表明Freundlich等温吸附模型能较好的描述吸附过程。以中国饮用水标准中汞的限值0.001mg/L为标准,研究一定浓度及一定量含汞废水处理时,所需吸附剂投料量的估算方法和试验验证结果,结果表明:控制合适的吸附条件,竹炭能较完全有效的除去废水中的汞。
The adsorption property of wood charcoal, bamboo charcoal, modified wood charcoal and modified bamboo charcoal for Hg（Ⅱ） in aqueous solution was comparecL The impacts of factors such as the pH, contact time, mass of absorbent on the adsorption were studied. Researches of kinetics showed that adsorption of the different charcoals for Hg （Ⅱ） can be described by pseudo first-order reaction. The apparent adsorption rate constants were determined for the different charcoals. The adsorption behavior of the different charcoals for Hg （Ⅱ） can be displayed with the Freundlich isotherm model. According to China＇ s drinking water standard 0.001 mgHg/L is the maximum limit of mercury allowed to be contained in water. The research studied method to estimate the quanlity of adsorbent needed as well as to validate the results by experiments during the treatment of a certain amount of merculy-containing wastewater with a certain concentration. The experiment results certified that different charcoals were capable of fully removing mercury in waster water under appropriate control of adsorption conditions.
出处
《世界竹藤通讯》
2008年第4期17-21,共5页
World Bamboo and Rattan
基金
浙江丽水学院开放性学生实验项目(2008005)
关键词
HG^2+
炭吸附材料
吸附性能
Hg （Ⅱ）
charcoal materials
adsorption property
adsorption effect
