以改性绿茶为吸附材料,探索了改性剂、改性剂浓度、染料的初始浓度、吸附时间、吸附温度等因素对改性绿茶吸附碱性品红,的影响,确定了改性绿茶最佳吸附条件。实验结果表明,绿茶经改性剂改性选出最佳改性剂为环氧氯丙烷,最佳改性剂浓度为0.015 mol·L-1,碱性品红初始质量浓度为20 mg·L-1时吸附量最大,最佳吸附温度为30℃,吸附时间240 min为最好,最大吸附量为53.6 mg·g-1。在描述改性绿茶对碱性品红吸附的动力学行为上,准一级动力学曲线更好;在等温吸附方面,改性绿茶对碱性品红的吸附行为非常符合Langmuir模型,改性绿茶对碱性品红的吸附为单分子层吸附。
Green tea was modified by chemical reagents for preparing biosorbent to remove basic fuchsine in waste water. Effects of chemical reagents, relative concentration, initial concentration of basic fuchsine, adsorption time, temperature on the adsorption capacity and adsorption kinetics were investigated for optimum condition analysis. Results showed that the best chemical reagent was epichlorohydrin. The optimum concentration was 0.015 mol·L-1. The optimum initial concentration of basic fuchsine was 20 mg·L-1. The optimum temperature was 30℃. The optimum absorption time was 240 min. The maximum absorption capacity of the modified green tea reached 53.6 mg·g-1. The adsorption kinetics followed the pseudo-first-order kinetic model. According to the isothermal adsorption of fuchsin basic adsorption with modified green tea, the Langmuir model was suitable for application. The adsorption of fuchsin basic by modified green tea belongs to single molecule layer adsorption.
[1] Yang SX, Wu YH, Aierken A, et al.Mono/competitive adsorption of Arsenic (III) and Nickel (II) using modified green tea waste [J]. Journal of the Taiwan Institute of Chemical Engineers, 2016, 60: 213-221. Mono/competitive adsorption of Arsenic (III) and Nickel (II) using modified green tea waste [J]. Journal of the Taiwan Institute of Chemical Engineers, 2016, 60: 213-221. http://dx.doi.org/10.1016/j.jtice.2015.07.007.
[2] Foroughi-dahra M, Abolghasemia H, Esmaielia M, et al. Experimental study on the adsorptive behavior of Congo red in cationic surfactant-modified tea waste[J]. Process Safety and Environmental Protection, 2015, 95(3): 226-236.
[3] 滕涛, 何穆, 李玉中. 改性茶叶对染料的生物吸附作用[J]. 贵州农业科学, 2012, 40(4): 206-208.
[4] 王艳, 苏雅娟, 李平, 等. 绿茶微粉对染料亚甲基蓝和孔雀石绿的吸附研究[J]. 中国食品学报, 2011, 11(4): 83-89.
[5] 白卯娟, 甘明强. 茶叶处理含氟废水的研究[J]. 茶叶科学, 2009, 29(4): 325-328.
[6] 王东梅, 龚正君, 陈钰, 等. ZnCl2改性花生壳对含铜废水的吸附研究[J]. 广东农业科学, 2013(19): 175-183.
[7] 简绍菊, 杨为森. 改性橙皮对水中中性红的吸附及其动力学[J]. 安徽农业大学学报, 2013, 40(3): 514-518.
[8] 李紫薇, 李小敏, 袁圣银, 等. 棉杆对水中碱性品红的吸附研究[J]. 水处理技术, 2015, 41(4): 66-70.
[9] 黄泱, 林永兴. 茶叶资源化利用及对染料废水的去除[J]. 漳州师范学院学报: 自然科学版, 2010, 2: 102-106.
[10] 余东向. 茶叶吸附染料作用的初步研究[J]. 离子交换与吸附, 1995, 11(5): 436-440.
[11] 朱振华, 李小敏, 张艺, 等. 改性橘皮对水中碱性品红的吸附[J]. 江苏农业科学, 2015, 43(5): 334-336.
[12] 韩婵, 钱和, 汪何雅. 绿茶吸附特性及单层水分吸附含量研究[J]. 江苏农业科学, 2011(1): 351-353.
[13] 黄泱, 林永兴. 茶叶资源化利用及对染料废水的去除[J]. 漳州师范学院学报, 2010(2): 102-106.
[14] Langmuir I.Adsorption of gases on plain surface of glass mica platinum[J]. Journal of the American Chemical Society, 1918, 40(9): 1361-1403.
[15] Xiong CH, Li YL, Wang GT.Selective removal of Hg (II) with polyacrylonitrile-2-amino-1,3,4-thiadiazole chelating resin: Batch and column study[J]. Chemical Engineering Journal, 2015, 259(9): 257-265.
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