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茶叶残渣改性制备海绵状吸附材料及其对Pb(Ⅱ)、Cu(Ⅱ)和Cd(Ⅱ)的吸附性能

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邱钰茵, 王娜娜, 肖唐付. 茶叶残渣改性制备海绵状吸附材料及其对Pb(Ⅱ)、Cu(Ⅱ)和Cd(Ⅱ)的吸附性能[J]. 环境化学, 2020, (11): 3180-3189. doi: 10.7524/j.issn.0254-6108.2019081703
引用本文: 邱钰茵, 王娜娜, 肖唐付. 茶叶残渣改性制备海绵状吸附材料及其对Pb(Ⅱ)、Cu(Ⅱ)和Cd(Ⅱ)的吸附性能[J]. 环境化学, 2020, (11): 3180-3189. doi: 10.7524/j.issn.0254-6108.2019081703
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QIU Yuyin, WANG Nana, XIAO Tangfu. Preparation and performance of tea waste-modified spongy biosorbent for Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) adsorption[J]. Environmental Chemistry, 2020, (11): 3180-3189. doi: 10.7524/j.issn.0254-6108.2019081703
Citation: QIU Yuyin, WANG Nana, XIAO Tangfu. Preparation and performance of tea waste-modified spongy biosorbent for Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) adsorption[J]. Environmental Chemistry, 2020, (11): 3180-3189. doi: 10.7524/j.issn.0254-6108.2019081703
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茶叶残渣改性制备海绵状吸附材料及其对Pb(Ⅱ)、Cu(Ⅱ)和Cd(Ⅱ)的吸附性能

  • 广州大学环境科学与工程学院/珠江三角洲水质安全与保护教育部重点实验室, 广州, 510006

    • 通讯作者: 王娜娜, E-mail: nnwang@gzhu.edu.cn ; 
  • 基金项目:

    国家自然科学基金（U1612442，41907317）资助.

Preparation and performance of tea waste-modified spongy biosorbent for Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) adsorption

  • Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China

    • Corresponding author: WANG Nana, nnwang@gzhu.edu.cn ; 
  • Fund Project: Supported by the National Natural Science Foundation of China (U1612442, 41907317).

  • 摘要: 本研究以浸泡过的茶叶为原材料，在强碱条件下进行黄原酸化改性，利用冷沉淀凝胶法成功制备出三维海绵状茶叶残渣改性吸附材料.该材料形状规则，呈多孔立体结构，便于固液分离.实验结果表明，该海绵状改性茶叶残渣对Pb（Ⅱ）、Cu（Ⅱ）和Cd（Ⅱ）的吸附4 h内达到平衡，其吸附行为受化学吸附控制，属于均一的单层吸附，最大吸附量分别为136.05、41.98、39.25 mg·g-1，吸附选择性遵循Pb（Ⅱ） > Cu（Ⅱ） > Cd（Ⅱ）.X射线衍射分析（XRD）、X射线光电子能谱分析（XPS）、X射线能谱分析（EDS）和傅里叶红外光谱分析（FTIR）等光谱学分析结果表明，离子交换作用、含杂原子基团的络合作用和微沉淀作用是海绵状改性茶叶残渣吸附重金属离子的主要机理.
    Abstract: In this study, the three-dimensional spongy tea waste-modified biosorbent was synthesized via the xanthation reaction under alkaline condition and by cryogelation technology. This biosorbent, with regular shape and porous stereo-structure, had the advantage of easy separation from liquid. The results suggested that biosorption of Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) on xanthate-modified tea-waste spongy (XTS) reached equilibrium within 4 h. Their biosorption behaviors on XTS were homogeneous monolayer adsorption and controlled by chemisorption, with the maximum biosorption capacities of 136.05, 41.98 and 39.25 mg·g-1, respectively. The adsorption selectivity of XTS followed the sequence of Pb(Ⅱ) > Cu(Ⅱ) > Cd(Ⅱ). The results of X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Energy Dispersive Spectroscopy (EDS) and Fourier Transform Infrared Spectrometer (FTIR) analyses showed that the removal of Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) mainly depended on the ion exchange, complexations of functional groups containing heteroatoms and microprecipitation.
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  • 收稿日期:  2019-08-17

茶叶残渣改性制备海绵状吸附材料及其对Pb(Ⅱ)、Cu(Ⅱ)和Cd(Ⅱ)的吸附性能

    通讯作者: 王娜娜, E-mail: nnwang@gzhu.edu.cn ; 
  • 广州大学环境科学与工程学院/珠江三角洲水质安全与保护教育部重点实验室, 广州, 510006
  • 收稿日期:  2019-08-17
基金项目:

国家自然科学基金（U1612442，41907317）资助.

摘要: 本研究以浸泡过的茶叶为原材料，在强碱条件下进行黄原酸化改性，利用冷沉淀凝胶法成功制备出三维海绵状茶叶残渣改性吸附材料.该材料形状规则，呈多孔立体结构，便于固液分离.实验结果表明，该海绵状改性茶叶残渣对Pb（Ⅱ）、Cu（Ⅱ）和Cd（Ⅱ）的吸附4 h内达到平衡，其吸附行为受化学吸附控制，属于均一的单层吸附，最大吸附量分别为136.05、41.98、39.25 mg·g-1，吸附选择性遵循Pb（Ⅱ） > Cu（Ⅱ） > Cd（Ⅱ）.X射线衍射分析（XRD）、X射线光电子能谱分析（XPS）、X射线能谱分析（EDS）和傅里叶红外光谱分析（FTIR）等光谱学分析结果表明，离子交换作用、含杂原子基团的络合作用和微沉淀作用是海绵状改性茶叶残渣吸附重金属离子的主要机理.

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