Su Fengsheng, Lu Chungsying
Department of Environmental Engineering, National ChungHsing University, Taichung, Taiwan.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2007 Sep;42(11):1543-52. doi: 10.1080/10934520701513381.
Multiwalled carbon nanotubes (CNTs) were thermally treated and were employed as adsorbents to study their adsorption kinetics and thermodynamics of natural dissolved organic matter (NDOM) from aqueous solutions. The adsorption kinetics follows the first-order rate law while the adsorption thermodynamics indicates the exothermic and spontaneous nature. A comparative study on the adsorption/desorption properties of NDOM between CNTs and granular activated carbon (GAC) was also conducted and revealed that the CNTs possess more NDOM adsorption capacities and show less weight loss through 10 cycles of water treatment and reactivation than the GAC. This suggests that the CNTs are promising NDOM adsorbents for preventing the microbiological degradation of drinking water quality as well as the formation of disinfection by products in water treatment.
对多壁碳纳米管（CNTs）进行了热处理，并将其用作吸附剂，以研究其对水溶液中天然溶解有机物（NDOM）的吸附动力学和热力学。吸附动力学遵循一级速率定律，而吸附热力学表明其具有放热和自发的性质。还对碳纳米管和颗粒活性炭（GAC）之间NDOM的吸附/解吸特性进行了比较研究，结果表明，与GAC相比，碳纳米管具有更高的NDOM吸附容量，并且在经过10个循环的水处理和再活化后重量损失更小。这表明碳纳米管是很有前景的NDOM吸附剂，可用于防止饮用水质量的微生物降解以及水处理中消毒副产物的形成。
