以三醛基间苯三酚和2, 5-二氨基-1, 4-苯二硫酚二盐酸盐为配体, 采用常温常压溶剂法制备COFs-SH材料, 并用红外光谱(FT-IR)以及扫描电镜(SEM)等技术手段对材料进行表征。为探究COFs-SH对Cu(Ⅱ)的吸附特性, 通过批量实验分别在不同的初始浓度、时间、pH、反应温度下进行吸附后, 使用火焰原子吸收分光光度计测定Cu(Ⅱ)浓度。结果表明:在一定浓度下, COFs-SH的吸附量随初始浓度的增加而增加, 当初始浓度为500mg/L时到达最大吸附容量145.6mg/g, 在不同pH环境下可以保持稳定的吸附性能。COFs-SH对Cu(Ⅱ)的吸附过程符合准二级动力学模型和Langmuir吸附模型。热力学结果表明, COFs-SH对Cu(Ⅱ)吸附是放热过程。所制COFs-SH材料在常温条件下可高效、稳定、环保地处理水体中的Cu污染, 在水体Cu(Ⅱ)的去除具备潜在的应用价值。
In this work, a COFs-SH material was obtained by room temperature and pressure solvent method with triformylphenol and 2, 5-diamino-1, 4-benzenedithiol dihydrochloride as ligands, and characterized by Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM).To investigate the adsorption properties of COFs-SH for Cu(Ⅱ) in water, batch adsorption experiments were carried out at different initial concentrations, times, pH, and reaction temperatures, respectively, and the remaining Cu(Ⅱ) concentrations were measured by flame atomic absorption spectrophotometer.The experimental results showed that under a certain concentration, the adsorption capacity of COFs-SH increased with the increase of the initial concentration, and when the initial concentration was 500mg/L, it reached the maximum adsorption capacity of 145.6mg/g, and could maintain stable adsorption under different pH environments.The adsorption process of Cu(Ⅱ) by COFs-SH was consistent with the pseudo-second-order model and Freundlich isotherm model.The thermodynamic results revealed that the adsorption of Cu(Ⅱ) by COFs-SH composite was an exothermic process.The COFs-SH prepared in this experiment can treat copper pollution in water efficiently, stably and environmentally at room temperature, and has a potential application in the removal of Cu(Ⅱ) from water.
[1] 周巧巧,任勃,李有志,等.中国河湖水体重金属污染趋势及来源解析[J].环境化学,2020,39(8):2044-2054.
[2] Zaimee M Z A,Sarjadi M S,Rahman M L.Heavy metals removal from water by efficient adsorbents[J].Water,2021,13(19):2659.
[3] Zhou Q Q,Yang N,Li Y Z,et al.Total concentrations and sources of heavy metal pollution in global river and lake water bodies from 1972 to 2017[J].Global Ecology and Conservation,2020,22:e00925.
[4] 王雪梅,季红,崔兴兰,等.共价有机骨架复合材料去除水体中重金属离子的研究进展[J].环境科学研究,2021,34(5):1168-1176.
[5] Pramudya M,Hayati A,Armando D S,et al.Toxicity of copper pollution on sperm quality of Cyprinus carpio[J].IOP Conference Series:Earth and Environmental Science,2021,718:012019.
[6] 紫金矿业污染事件[J].世界环境,2013,31(4):7.
[7] 石湖泉.乐安江流域铜污染的生态环境毒性研究[D].南昌:南昌大学,2019.
[8] 李诗宇,阴永光,史建波,等.共价有机框架在水中二价汞吸附去除中的应用[J].化学进展,2022,34(5):1017-1025.
[9] 于栋,罗庆,苏伟,等.重金属废水电沉积处理技术研究及应用进展[J].化工进展,2020,39(5):1938-1949.
[10] Lu W Z,Ya L,Yan W,et al.Integration of covalent organic frameworks into hydrophilic membrane with hierarchical porous structure for fast adsorption of metal ions[J].Journal of Hazardous Materials,2021,407(5):124390.
[11] 王昶,王远东,郝林林,等.蒙脱石絮凝剂对污染地表水中重金属的强化混凝处理[C].南京:2020中国环境科学学会科学技术年会,2020.
[12] Dinari M,Hatami M.Novel N-riched crystalline covalent organic framework as a highly porous adsorbent for effective cadmium removal[J].Journal of Environmental Chemical Engineering,2019,7(1):102907.
[13] Cote A P.Porous,crystalline,covalent organic frameworks[J].Science,2005,310(5751):1120411.
[14] Lv S W,Liu J M,Wang Z H,et al.Recent advances on porous organic frameworks for the adsorptive removal of hazardous materials[J].Journal of Environmental Sciences,2019,80(6):169-185.
[15] 李子强,刘大朋,何健,等.共价有机框架材料在环境保护领域中的应用研究进展[J].环境工程,2019,37(4):98-103.
[16] MariaAnna G,Panagiota B,Thomas S,et al.Recent advances in covalent organic frameworks for heavy metal removal applications[J].Energies,2021,14(11):3197.
[17] Sun Q,Aguila B,Perman J,et al.Postsynthetically modified covalent organic frameworks for efficient and effective mercury removal[J].Journal of the American Chemical Society,2017,139(7):2786-2793.
[18] Jiang Y Z,Liu C Y,Huang A S.EDTA-functionalized covalent organic framework for the removal of heavy-metal ions[J].ACS Applied Materials & Interfaces,2019,11(35):32186-32191.
[19] 刘继龙,刘璐,马孝义,等.不同尺度不同土层土壤盐分的空间变异性研究[J].应用基础与工程科学学报,2018,26(2):305-312.
[20] Nordstrand J,Dutta J.Dynamic Langmuir Model:a simpler approach to modeling capacitive deionization[J].The Journal of Physical Chemistry C,2019,123(26):16479-16485.
[21] Vigdorowitsch M,Pchelintsev A,Tsygankova L,et al.Freundlich Isotherm:an adsorption model complete framework[J].Applied Sciences,2021,11(17):11178078.
[22] Zhang L,Zheng Q Q,Xiao S J,et al.Covalent organic frameworks constructed by flexible alkyl amines for efficient gold recovery from leaching solution of e-waste[J].Chemical Engineering Journal,2021,426(15),DOI:10.1016/j.cej.2021.131865.
[23] Prasannamedha G,Kumar P,Mehala R,et al.Enhanced adsorptive removal of sulfamethoxazole from water using biochar derived from hydrothermal carbonization of sugarcane bagasse[J].Journal of Hazardous Materials,2021,407(1),DOI:10.1016/j.jhazmat.2020.124825.
[24] 范世锁,刘文浦,王锦涛,等.茶渣生物炭制备及其对溶液中四环素的去除特性[J].环境科学,2020,41(3):1308-1318.
[25] Zhang Y P,Yue X P,Xu W W,et al.Amino modification of rice straw-derived biochar for enhancing its cadmium(Ⅱ) ions adsorption from water[J].Journal of Hazardous Materials,2019,379(1),DOI:10.1016/j.jhazmat.2019.120783.
[26] Xiao Y L,Ma C,Jin Z Y,et al.Functional covalent organic framework illuminate rapid and efficient capture of Cu(Ⅱ) and reutilization to reduce fire hazards of epoxy resin[J].Separation and Purification Technology,2021,259,DOI:10.1016/j.seppur.2020.118119.
[27] Liu X N,Wu M G,Li C C,et al.Interaction structure and affinity of zwitterionic amino acids with important metal cations (Cd2+,Cu2+,Fe3+,Hg2+,Mn2+,Ni2+ and Zn2+) in aqueous solution:a theoretical study[J].Molecules,2022,27(8),DOI:10.3390/molecules27082407.
[28] He P W,Bang F,Zhang Q W,et al.Amidinothiourea-linked covalent organic framework for the adsorption of heavy metal ions[J].Polymer International,2021,71(1):38-46.
基金资助
广西自然科学基金项目(2022GXNSFAA035470、2020GXNSFBA297138);广西中青年能力提升项目(2019KY0626);大学生创新创业项目(202210605009、S202210605044);河池学院项目(2021GCC022、2022XJYB004)
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