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新型三聚氰酸-氨基硫脲螯合树脂对Ag⁺在酸性溶液中的高容量选择性吸附

Selective Adsorption of Ag⁺ on a New Cyanuric-Thiosemicarbazide Chelating Resin with High Capacity from Acid Solutions.

作者信息

Lin Guo, Wang Shixing, Zhang Libo, Hu Tu, Peng Jinhui, Cheng Song, Fu Likang

机构信息

State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China.

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.

出版信息

Polymers (Basel). 2017 Nov 2;9(11):568. doi: 10.3390/polym9110568.

DOI:10.3390/polym9110568
PMID:30965873
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6418960/
Abstract

A new cyanuric-thiosemicarbazid (TSC-CC) chelating resin was synthesized and employed to selectively adsorb Ag⁺ from acid solutions. The effects of acid concentration, initial concentration of Ag⁺, contact time and coexisting ions were investigated. The optimal acid concentration was 0.5 mol/L. The adsorption capacity of Ag⁺ reached 872.63 mg/g at acid concentration of 0.5 mol/L. The adsorption isotherm was fitted well with the Langmuir isotherm model and the kinetic data preferably followed the pseudo-second order model. The chelating resin showed a good selectivity for the Ag⁺ adsorption from acid solutions. Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy/energy dispersive spectrometer (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) were used to study the adsorption mechanism. The chelating and ionic interaction was mainly adsorption mechanism. The adsorbent presents a great potential in selective recovery Ag⁺ from acid solutions due to the advantage of high adsorption capacity and adapting strongly acidic condition. The recyclability indicated that the (TSC-CC) resin had a good stability and can be recycled as a promising agent for removal of Ag⁺.

摘要

合成了一种新型的氰尿酸-硫代氨基脲（TSC-CC）螯合树脂，并用于从酸性溶液中选择性吸附Ag⁺。研究了酸浓度、Ag⁺初始浓度、接触时间和共存离子的影响。最佳酸浓度为0.5 mol/L。在0.5 mol/L的酸浓度下，Ag⁺的吸附容量达到872.63 mg/g。吸附等温线与朗缪尔等温线模型拟合良好，动力学数据较好地符合准二级模型。该螯合树脂对从酸性溶液中吸附Ag⁺表现出良好的选择性。利用傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、扫描电子显微镜/能谱仪（SEM-EDS）和X射线光电子能谱（XPS）研究了吸附机理。螯合和离子相互作用是主要的吸附机理。由于具有高吸附容量和能适应强酸性条件的优点，该吸附剂在从酸性溶液中选择性回收Ag⁺方面具有巨大潜力。可回收性表明（TSC-CC）树脂具有良好的稳定性，可作为一种有前景的Ag⁺去除剂进行循环使用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/b212c291a77b/polymers-09-00568-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/9d48e7f39657/polymers-09-00568-sch001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/a3c11642ad57/polymers-09-00568-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/9b6ba5c50dec/polymers-09-00568-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/5348f6fd5e83/polymers-09-00568-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/dbcf22ddcbe2/polymers-09-00568-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/6fa99c3fb441/polymers-09-00568-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/baa96cb69cbe/polymers-09-00568-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/2fa1c10e574b/polymers-09-00568-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/d4bac64778dd/polymers-09-00568-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/b212c291a77b/polymers-09-00568-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/9d48e7f39657/polymers-09-00568-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/b02de50e44b6/polymers-09-00568-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/a3c11642ad57/polymers-09-00568-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/6917a2e874a0/polymers-09-00568-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/0420a3e4d649/polymers-09-00568-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/a58f6c12d3ff/polymers-09-00568-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/9b6ba5c50dec/polymers-09-00568-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/5348f6fd5e83/polymers-09-00568-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/dbcf22ddcbe2/polymers-09-00568-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/6fa99c3fb441/polymers-09-00568-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/baa96cb69cbe/polymers-09-00568-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/2fa1c10e574b/polymers-09-00568-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/d4bac64778dd/polymers-09-00568-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1f37/6418960/b212c291a77b/polymers-09-00568-sch002.jpg

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