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| 1 | Phyllosticta capitalensis粉末菌剂对孔雀石绿染料的吸附动力学分析显示文摘将富含多糖的内源真菌Phyllosticta capitalensis的粉末菌剂作为生物吸附剂,对孔雀石绿染料废水进行吸附处理。分别考察了粉末剂量、孔径大小、染料的初始浓度、pH值、背景离子强度和金属离子等因素对P.capitalensis粉末菌剂吸附孔雀石绿染液的影响。通过对实验数据进行吸附动力学和等温吸附模型的拟合,以及对吸附前后的吸附剂进行红外光谱扫描,探究P.capitalensis粉末菌剂对孔雀石绿染料的吸附机理。结果表明:粉末菌剂的最大单位吸附量为19.61 mg·g^(-1)。当pH=6时吸附效果更佳,且在一定范围内粉末菌剂的粒径越大,染料浓度越高,吸附效果越好。而较高的离子强度与金属离子对P.capitalensis粉末菌剂吸附孔雀石绿溶液则起一定的抑制作用。动力学和等温吸附模型拟合分析表明该实验吸附过程符合准二级动力学吸附模型与Koble-Corrigan等温吸附模型,说明该吸附过程属于多层化学吸附,红外光谱扫描结果表明是粉末菌剂中的多糖羟基和羰基与染料发生反应。 | 肖佳敏 林永慧 何兴兵 陈明蓉 李芬 | 2021 | 安徽农业大学学报2021，48，1： | 1 |
| 2 | Effect of microstructure and surface chemistry in liquid-phase adsorptive nicotine by almond-shell-based activated carbon显示文摘The effect of microstructure and surface chemistry on nicotine adsorption capacity of almond-shell-based activated carbon was studied.Almond-shell-based activated carbon was reactivated or modified with steam,ZnCl2and NaHSO4separately.The surface area and pore structure parameters of activated carbon were determined from the adsorption-desorption isotherm of nitrogen at 77K.Boehm titration and FTIR were explored to determine the surface oxygen groups.The results revealed that nicotine adsorption from solution on carbons depend on the micropores and phenolic groups.A strong correlation between the amounts of adsorbed nicotine and the phenolic groups was observed,whereas the higher amounts of carboxylic groups decrease the nicotine adsorption capacity on activated carbons. | YANG JiLiang FANG Fang ZHOU JianBin | 2013 | Chinese Science Bulletin2013，58，30： | 1 |
| 3 | TiO_2/Ag modified penta-bismuth hepta-oxide nitrate and its adsorption performance for azo dye removal显示文摘A modified hydrophilic penta-bismuth hepta-oxide nitrate(Bi 5 O 7 NO 3) surface was synthesized via a precipitation method using TiO 2 and Ag as modified agents.The synthesized product was characterized by different analytical techniques.The removal efficiency was evaluated using mono-and di-sulphonated azo dyes as model pollutants.Different kinetic,isotherm and diffusion models were chosen to describe the adsorption process.X-ray photoelectron spectroscopy(XPS) results revealed no noticeable differences in the chemical states of modified adsorbent when compared to pure Bi 5 O 7 NO 3 ;however,the presence of hydrophilic centres such as TiO 2 and Ag developed positively charged surface groups and improved its adsorption performance to a wide range of azo dyes.Dyes removal was found to be a function of adsorbent dosage,initial dye concentration,solution pH and temperature.The reduction of Langmuir 1,2-mixed order kinetics to the second or first-order kinetics could be successfully used to describe the adsorption of dyes onto the modified adsorbent.Mass transfer can be described by intra-particle diffusion at a certain stage,but it was not the rate limiting step that controlled the adsorption process.Homogenous behavior of adsorbent surface can be explored by applying Langmuir isotherm to fit the adsorption data. | Eshraq Ahmed Abdullah Abdul Halim Abdullah Zulkarnain Zainal Mohd Zobir Hussein Tan Kar Ban | 2012 | Journal of Environmental Sciences2012，24，10： | 0 |
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