巯基纤维素吸附剂去除染料-Cr(Ⅵ)复合污染的作用机制  

Mechanisms for Removal of Dye-Cr(VI)Compound Pollution by Sulfhydryl Modified Cellulose Adsorbent

作　　者：刘燕铃 刘以凡[2] 吕源财[2] 叶晓霞[2] 林春香[1,2] 刘明华[1,2,3] Yaning Liu;Yifan Liu;Yuancai Lü;Xiaoxia Ye;Chunxiang Lin;Minghua Liu(College of Advanced Manufacturing,Fuzhou University,Jinjiang 362200,China;College of Environment and Safety Engineering,Fuzhou University,Fuzhou 350108,China;College of Environmental and Biological Engineering,Putian University,Putian 351100,China)

机构地区：[1]福州大学先进制造学院,福建晋江362200 [2]福州大学环境与安全工程学院,福建福州350108 [3]莆田学院环境与生物工程学院,福建莆田351100

出　　处：《高分子材料科学与工程》2023年第10期9-19,共11页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(22208057);福建省自然科学基金资助项目(2020J01506)。

摘　　要：以α-纤维素为原料,采用高碘酸钠氧化法对纤维素进行改性制备了巯基纤维素吸附剂(Cell-SH),采用扫描电镜、傅里叶变换红外光谱及X射线光电子能谱对Cell-SH的形貌和结构进行表征,系统考察了Cell-SH对水溶液中孔雀石绿(MG)和六价铬(Cr(Ⅵ))复合污染的去除效果、影响因素及机理。结果表明,氧化改性后,Cell-SH表面含有—SH官能团,对MG-Cr(Ⅵ)复合污染具有良好的去除性能,其对二者的吸附量分别为58.9 mg/g和28.7 mg/g;吸附剂表面还同时存在MG与Cr(Ⅵ)的络合物,吸附过程涉及氢键结合、静电引力、还原作用及螯合作用等作用力。Cell-SH具有去除水溶液中MG和Cr(Ⅵ)复合污染的优异性能,具有较大的应用潜力。Sulfhydryl cellulose(Cell-SH)was prepared by sodium periodate oxidation fromα-cellulose.The morphology and structure of Cell-SH were characterized by scanning electron microscopy-energy dispersive spectrometer(SEM-EDS),Fourier-transformed infrared spectrum(FT-IR),X-ray photoelectron spectroscopy(XPS).The efficiency,influencing factors and mechanism on the removal of malachite green(MG)-hexavalent chromium(Cr(VI))compound pollution were systematically investigated.The experimental results show that after oxidation modification,the sulfhydryl cellulose adsorbent contains-SH functional groups and has good performance in the removal of MG-Cr(VI)compound pollution,and the adsorption capacity of MG and Cr(VI)can reach 58.9 mg/g and 28.7 mg/g,respectively.The complexes of MG and Cr(VI)are also observed on the adsorbent surface,and the adsorption process involves hydrogen bonding,electrostatic gravitational force,reduction and chelation.Cell-SH has excellent performance in the removal of MG-Cr(VI)compound pollution in aqueous solution and has great potential for application.

关 键 词：纤维素吸附剂 复合污染 六价铬 孔雀石绿 吸附 

分 类 号：X703[环境科学与工程—环境工程]