Lu Chungsying, Chung Yao-Lei, Chang Kuan-Foo
Department of Environmental Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan.
Water Res. 2005 Mar;39(6):1183-9. doi: 10.1016/j.watres.2004.12.033.
Commercial carbon nanotubes (CNTs) were purified by acid solution and were employed as adsorbents to study adsorption of trihalomethanes (THMs) from water. The properties of CNTs such as purity, structure and nature of the surface were greatly improved after acid treatment which made CNTs become more hydrophilic and suitable for adsorption of low molecular weight and relatively polar THM molecules. The adsorption of THMs onto CNTs fluctuates very little in the pH range 3-7, but decreases with pH value as pH exceeds 7. A comparative study between CNTs and powdered activated carbon (PAC) for adsorption of THMs from water was also conducted. The short time needed to reach equilibrium as well as the high adsorption capacity of CHCl3, which accounts for a significant portion of THMs in the chlorinated drinking water, suggests that CNTs possess highly potential applications for THMs removal from water.
商用碳纳米管（CNTs）通过酸溶液进行了纯化，并用作吸附剂来研究水中三卤甲烷（THMs）的吸附情况。经过酸处理后，碳纳米管的纯度、结构和表面性质等特性得到了极大改善，这使得碳纳米管变得更具亲水性，适合吸附低分子量且相对极性的三卤甲烷分子。在pH值为3至7的范围内，三卤甲烷在碳纳米管上的吸附波动很小，但当pH值超过7时，吸附量会随着pH值的升高而降低。还进行了碳纳米管与粉末活性炭（PAC）从水中吸附三卤甲烷的对比研究。达到平衡所需的时间较短，以及对氯仿（CHCl3）的高吸附容量（氯仿在氯化饮用水中的三卤甲烷中占很大比例）表明，碳纳米管在从水中去除三卤甲烷方面具有高度潜在的应用价值。
