载铁(Fe^(3+))活性炭去除饮用水中砷的性能研究  

Study on Properties of Removing As(V) from Drinking Water Using Activated Charcoal Modified by Fe^(3+)

作　　者：张中杰[1] 伍雅婧[1] 王慧[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054

出　　处：《世界科技研究与发展》2014年第2期129-132,137,共5页World Sci-Tech R&D

基　　金：国家自然科学基金(20877036);陕西省自然科学基金(2013JQ2019)资助

摘　　要：以Fecl_3为原料采用浸渍法,获得了载铁活性炭,考察对水中砷的去除能力及影响因素,并对吸附过程进行等温吸附模型和动力学的模拟。实验结果表明,砷去除的最佳条件为:栽铁活性炭平衡振荡5h,pH控制在7。水中常见共存离子除Ca^(2+)外不影响砷的去除效果,ca^(2+)有助于砷的去除。改性炭对砷的吸附能较好的符合Langmuir模型和二级动力学方程,而不符合Freundlich模型,说明这一吸附过程为单分子层吸附。由于活性炭对砷的吸附属于物理吸附,故全过程不引入其他离子,不会对水体造成二次污染。Activated charcoal modified by Fe3＋ is gotten by impregnation method from FeC13. Ability of removing As （ V ） from drinking water and its influence factors, isotherm adsorption model and dynamic simulation are studied. The experi- ments showed that when reaction 5 h and the pH value are kept in 7, the reaction condition become the best. The common coexisting ions, except for Ca2 ＋ , do not affect the arsenic removal effect, and Ca2 ＋ is helpful for arsenic removal. The experi- ments data can be well simulated by both the Langmuir model and second-order kinetics equation. Additionally, the adsorp- tion of As （V） by the modification of activated charcoal belongs to physical absorption. Therefore, other ions won＇t be brought into the water by using this method.

关 键 词：砷 载铁 活性炭 除砷 

分 类 号：TQ424.1[化学工程]