Marungrueng Khanidtha, Pavasant Prasert
National Research Center for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok 10330, Thailand.
Bioresour Technol. 2007 May;98(8):1567-72. doi: 10.1016/j.biortech.2006.06.010. Epub 2006 Aug 22.
The sorptions of three basic dyes, Astrazon((R)) Blue FGRL (AB), Astrazon((R)) Red GTLN (AR), and methylene blue (MB) onto green macroalga Caulerpa lentillifera were investigated. The results were compared to the sorption performance of a commercial activated carbon (CARBON). The results revealed that the alga exhibited greater sorption capacities than activated carbon for the three basic dyes investigated in this work. The sorption process for all mixture systems (ALGA/AB, ALGA/AR, ALGA/MB, CARBON/AB, CARBON/AR, and CARBON/MB) obeyed the pseudo-second order kinetic model. C. lentillifera could more rapidly sequester AR when compared with activated carbon, but was more slowly in the sorption of AB. For the sorption of MB, both ALGA and CARBON seemed to have the same sorption rate. The sorption processes were initially controlled by both film and pore-diffusion, and only were limited by pore diffusion in the later stage. The isotherms followed Langmuir model which suggested that the sorption was monolayer coverage.
研究了三种碱性染料，即阿斯特拉宗蓝FGRL（AB）、阿斯特拉宗红GTLN（AR）和亚甲基蓝（MB）在绿色大型海藻长茎葡萄蕨藻上的吸附情况。将结果与商用活性炭（CARBON）的吸附性能进行了比较。结果表明，对于本研究中所考察的三种碱性染料，该海藻表现出比活性炭更高的吸附容量。所有混合体系（海藻/AB、海藻/AR、海藻/MB、活性炭/AB、活性炭/AR和活性炭/MB）的吸附过程均符合准二级动力学模型。与活性炭相比，长茎葡萄蕨藻能更快速地螯合AR，但对AB的吸附较慢。对于MB的吸附，海藻和活性炭似乎具有相同的吸附速率。吸附过程最初受膜扩散和孔扩散共同控制，后期仅受孔扩散限制。等温线符合朗缪尔模型，这表明吸附为单分子层覆盖。
