文献类型：期刊文献

中文题名：榴莲壳和不同炭材料对低汞溶液的吸附动力学

英文题名：Adsorption Kinetics of Low Mercury Solution with Durian Shell and Activated Carbon

作者：赵子科[1];陈春亮[1];柯盛[1];赵利容[2];张际标[2];李剑[3]

机构：[1]广东海洋大学分析测试中心,广东湛江524088;[2]广东海洋大学化学与环境学院,广东湛江524088;[3]广东海洋大学食品科技学院,广东湛江524088

年份：2022

卷号：41

期号：1

起止页码：90

中文期刊名：岩矿测试

外文期刊名：Rock and Mineral Analysis

收录：CSTPCD、、CSCD2021_2022、北大核心、CSCD、北大核心2020

基金：广东省湛江市非资助科技攻关计划项目“湛江湾邻苯二甲酸酯类环境激素(PAEs)污染的陆源输入特征和排海通量研究”(2019B01009)。

语种：中文

中文关键词：榴莲壳;活性炭;汞;原子荧光光谱法;吸附动力学

外文关键词：durian shell;carbon materials;mercury;atomic fluorescence spectrometry;adsorption kinetics

中文摘要：含Hg(Ⅱ)废水直接排放会对环境产生危害,目前多采用活性炭去除,而活性炭制作需要高温热解和活化,导致其使用成本较高。近年来,果皮、果渣、炉渣等废弃物也被尝试应用于直接去除水溶液中的重金属离子。本文采用榴莲壳、椰壳活性炭和活性炭纤维在不同条件下对低浓度Hg(Ⅱ)溶液进行吸附,使用原子荧光光谱法对吸附溶液中剩余的Hg(Ⅱ)含量进行测定,着重对榴莲壳的吸附机理进行探索。实验结果揭示,Hg(Ⅱ)在Lagergren准二级动力学模型下,三种材料最大吸附量(Q_(m))比较结果为:活性炭纤维(5.61μg/g)>榴莲壳(1.68μg/g)>椰壳活性炭(0.96μg/g)。吸附试验和热力学方程得出三种材料对Hg(Ⅱ)的吸附均是自发进行的(ΔG<0);椰壳活性炭对Hg(Ⅱ)的吸附以物理吸附为主(ΔH>0);榴莲壳吸附为吸热过程(ΔH<0),吸附体系升温可提高榴莲壳吸附Hg(Ⅱ)的速率和吸附容量。本研究表明来源广泛的榴莲壳可以作为吸附剂处理含Hg(Ⅱ)的废水,达到以废治废的目的。

外文摘要：BACKGROUND:The direct discharge of Hg(Ⅱ)is harmful to the environment.At present,activated carbon is used to remove it,but the production of activated carbon through high-temperature pyrolysis and activation is very expensive.OBJECTIVES:To investigate the adsorption difference and mechanism on low-concentration Hg(Ⅱ)for durian shell,coconut shell activated carbon and activated carbon fiber under different conditions.METHODS:The remaining Hg(Ⅱ)in the adsorption solution was determined by atomic fluorescence spectrometry.The adsorb kinetic parameters of different adsorbents were determined by Lagergren pseudo-second-order kinetic model.RESULTS:In the Lagergren pseudo-second-order kinetic model,the maximum adsorption capacity(Q_(M))of the three materials was as follows:activated carbon fiber(5.61μg/g)>durian shell(1.68μg/g)>coconut shell activated carbon(0.96μg/g).The adsorption test and thermodynamic equation showed that the adsorption of Hg(Ⅱ)by the three materials was spontaneous(ΔG<0).The adsorption of Hg(Ⅱ)by coconut shell activated carbon was mainly physical adsorption(ΔH>0),while the adsorption of durian shell was an endothermic process(ΔH<0).Due to the increase of temperature,the adsorption rate and adsorption capacity were improved.CONCLUSIONS:Durian shell from a wide range of sources can be used as an effective adsorbent to treat wastewater containing Hg(Ⅱ).