Tengfei Wu, Junjie Lei, Liyun Lin, Qing Wang, Taimoor Hassan Farooq, Guangjun Wang, Jun Wang, Wende Yan
{"title":"MOF-based Ca-alginate/PAA granulate beads for efficient heavy metal removal from water: Synthesis, performance, and mechanism","authors":"Tengfei Wu, Junjie Lei, Liyun Lin, Qing Wang, Taimoor Hassan Farooq, Guangjun Wang, Jun Wang, Wende Yan","doi":"10.1016/j.eti.2023.103428","DOIUrl":null,"url":null,"abstract":"Developing high-efficient and easy-to-recover adsorbents for the removal of toxic metals in water is imperative, although it poses a huge challenge. In this study, a sulfur-functionalized metal-organic framework was incorporated into Ca-alginate/polyacrylic acid granulates as an effective adsorbent (abbr. CPZ-SH) for Cu2+ and Cd2+ removal. The physicochemical properties of the obtained CPZ-SH were determined by the integrated characterization techniques (e.g., FTIR, XRD, and SEM). The environmental effects of solution pH, typical background cations (K+, Na+, Mg2+, and Ca2+), and dissolved organic matter were assessed to determine the adsorption behaviors of the granulates. Time-dependent adsorption kinetics suggested that the adsorption process was dominated by an intraparticle diffusion procedure. CPZ-SH exhibited maximum adsorption capacities of 75.8 and 48.4 mg g–1 at 30 ℃, and excellent adsorption reusability with Cu2+ and Cd2+ adsorption efficiencies over 96.0% and 85.1% after 10 cycles, respectively. The extended X-ray absorption fine structure (EXAFS) demonstrated that the functional groups (thiol, carboxyl, and hydroxyl) played a crucial role in adsorption processes. The findings provided an effective strategy to construct nanostructured metal-organic frameworks (MOFs) into granulates as recyclable adsorbents and enable heavy metal removal from water.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"27 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Technology and Innovation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.eti.2023.103428","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Developing high-efficient and easy-to-recover adsorbents for the removal of toxic metals in water is imperative, although it poses a huge challenge. In this study, a sulfur-functionalized metal-organic framework was incorporated into Ca-alginate/polyacrylic acid granulates as an effective adsorbent (abbr. CPZ-SH) for Cu2+ and Cd2+ removal. The physicochemical properties of the obtained CPZ-SH were determined by the integrated characterization techniques (e.g., FTIR, XRD, and SEM). The environmental effects of solution pH, typical background cations (K+, Na+, Mg2+, and Ca2+), and dissolved organic matter were assessed to determine the adsorption behaviors of the granulates. Time-dependent adsorption kinetics suggested that the adsorption process was dominated by an intraparticle diffusion procedure. CPZ-SH exhibited maximum adsorption capacities of 75.8 and 48.4 mg g–1 at 30 ℃, and excellent adsorption reusability with Cu2+ and Cd2+ adsorption efficiencies over 96.0% and 85.1% after 10 cycles, respectively. The extended X-ray absorption fine structure (EXAFS) demonstrated that the functional groups (thiol, carboxyl, and hydroxyl) played a crucial role in adsorption processes. The findings provided an effective strategy to construct nanostructured metal-organic frameworks (MOFs) into granulates as recyclable adsorbents and enable heavy metal removal from water.