Removal of copper(II) from aqueous solution with rape stalk modified by citric acid
Removal of copper(II) from aqueous solution with rape stalk modified by citric acid
复制标题
柠檬酸改性油菜秆去除水溶液中的铜(II)
DOI：
10.1080/01932691.2016.1149716
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发表时间：
2017-02
影响因子：
2.2
通讯作者：
Ding Yigang
中科院分区：
文献类型：
--
作者：
Liu Dong;Li Yanyan;Yu Junxia;Ding Yigang
摘要 本文以柠檬酸（CA）对油菜茎秆进行改性，制备铜离子生物吸附剂。通过傅里叶变换红外 (FTIR)、zeta 电位和热重分析 (TGA) 对改性油菜茎 (MRS) 进行了表征。研究了初始 Cu2+ 浓度、接触时间、初始 pH 值和温度等各种参数对吸附容量的影响。 MRS在298 K时的吸附容量为69.84 mg/g，远高于天然油菜茎(NRS)的18.24 mg/g。还从动力学和热力学方面评估了吸附机理。 Langmuir 等温线模型很好地描述了吸附平衡数据。吸附过程遵循准二级速率动力学。热力学研究表明吸附过程具有自发性和吸热性。证实了离子交换的吸附机理。 MRS 可能是一种潜在的低成本绿色吸附剂，用于从水溶液中去除 Cu2+。图解摘要
ABSTRACT In this paper, rape stalk was modified with citric acid (CA) to prepare copper ion biosorbent. The modified rape stalk (MRS) was characterized by Fourier transforms infrared (FTIR), zeta potential, and thermogravimetric analysis (TGA). The effects of various parameters like initial Cu2+ concentration, contact time, initial pH, and temperature on adsorption capacity were studied. The adsorption capacity of MRS at 298 K was 69.84 mg/g, far higher than 18.24 mg/g for native rape stalk (NRS). The adsorption mechanism was also evaluated in terms of kinetics and thermodynamics. The adsorption equilibrium data was well described by the Langmuir isotherm model. The adsorption process followed the pseudo-second-order rate kinetics. Thermodynamic study showed spontaneous and endothermic nature of the adsorption process. The ion exchange of the adsorption mechanism was affirmed. MRS could be a potentially low-cost and green adsorbent for removal of Cu2+ from aqueous solution. GRAPHICAL ABSTRACT
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影响因子：
5.6
作者：
N. Gamze Turan;S. Elevli;B. Mesci
通讯作者：
N. Gamze Turan;S. Elevli;B. Mesci
影响因子：
--
作者：
Yongjun Wu;Lijun Zhang;Congli Gao;J. Ma;Xinghua Ma;R. Han
通讯作者：
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影响因子：
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作者：
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影响因子：
13.6
作者：
Özacar, M;Sengil, IA
通讯作者：
Sengil, IA
影响因子：
11.2
作者：
Wan, Meng-Wei;Kan, Chi-Chuan;Dalida, Maria Lourdes P.
通讯作者：
Dalida, Maria Lourdes P.