Njoku V O, Islam Md Azharul, Asif M, Hameed B H
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia; Department of Chemistry, Faculty of Science, Imo State University, P.M.B. 2000, Owerri, Nigeria.
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia; Forestry and Wood Technology Discipline, Khulna University, Khulna 9208, Bangladesh.
J Environ Manage. 2015 May 1;154:138-44. doi: 10.1016/j.jenvman.2015.02.002. Epub 2015 Feb 24.
The removal of toxic herbicide from wastewater is challenging due to the availability of suitable adsorbents. The Langsat empty fruit bunch is an agricultural waste and was used in this study as a cheap precursor to produce activated carbon for the adsorption of herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) at different initial concentrations ranging from 50 to 400 mg/L. The produced Langsat empty fruit bunch activated carbon (LEFBAC) was mesoporous and had high surface area of 1065.65 m(2)/g with different active functional groups. The effect of shaking time, temperature and pH on 2,4-D removal were investigated using the batch technique. The adsorption capacity of 2,4-D by LEFBAC was decreased with increase in pH of solution whereas adsorption capacity increased with temperature. The adsorption data was well described by Langmuir isotherm followed by removal capacity of 261.2 mg/g at 30 °C. The results from this work showed that LEFBAC can be used as outstanding material for anionic herbicide uptake from wastewater.
由于缺乏合适的吸附剂，从废水中去除有毒除草剂具有挑战性。兰撒空果串是一种农业废弃物，在本研究中用作廉价前驱体来制备活性炭，用于吸附初始浓度范围为50至400mg/L的除草剂2,4-二氯苯氧乙酸（2,4-D）。所制备的兰撒空果串活性炭（LEFBAC）具有介孔结构，表面积高达1065.65m²/g，且含有不同的活性官能团。采用间歇技术研究了振荡时间、温度和pH对2,4-D去除效果的影响。LEFBAC对2,4-D的吸附容量随溶液pH升高而降低，随温度升高而增加。吸附数据符合朗缪尔等温线，在30°C时去除容量为261.2mg/g。这项工作的结果表明，LEFBAC可作为从废水中去除阴离子除草剂的优异材料。
