文献类型：期刊文献

英文题名：Freeze-thaw as a route to build manageable polysaccharide cryogel for deep cleaning of crystal violet

作者：Hu, Xinyu[1,2,3,4,5] Yan, Linlin[1,2] Wang, Yongmei[1] Xu, Man[1]

第一作者：胡新宇;Hu, Xinyu

通信作者：Hu, XY[1]|[a0005881e11db1c0efa81]胡新宇;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[3]Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210042, Jiangsu, Peoples R China;[4]Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Beijing 100714, Peoples R China;[5]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China

年份：2020

卷号：396

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20202008643936);Scopus(收录号：2-s2.0-85084359628);WOS:【SCI-EXPANDED(收录号:WOS:000551969200142)】；

基金：This work was supported by the Fundamental Research Funds of CAF under the Grant CAFYBB2020QB007, the National Natural Science Foundation of China under the Grant 31700500 and the Key Lab. of Biomass Energy and Material, Jiangsu Province (KLBEM) under the Grant JSBEM-S-201904.

语种：英文

外文关键词：Novel cryogel; Salecan; Locust bean gum; Manageable; Monolayer chemisorption mechanism; Deep cleaning of CV

摘要：Crystal violet (CV) is one of the most toxic organic dyes, thus there is a critical need to remove it from wastewater before discharging into the environment. To tackle this challenge, new resources should be exploited to construct green and environmentally friendly adsorbents. Herein, we designed a novel cryogel by freeze-thaw of naturally derived polysaccharides salecan and locust bean gum (LBG) without any toxic and organic crosslinkers. Their three-dimensional network structure was established by strong hydrogen bonding interactions between the two polysaccharides and has been characterized systematically. More specially, salecan/LBG ratio could be accurately tuned to enhance the storage modulus, and to adjust the hydrophilicity and pore architecture of these cryogels. Batch experiments with the subject of salecan/LBG ratios, pHs, initial dye concentrations as well as contact time were studied. The adsorption equilibrium data could be well-fitted with pseudo-second-order model and Langmuir model, revealing monolayer chemical adsorption mechanism. The maximum CV adsorption capacity calculated by Langmuir equation was 309.5 mg/g, higher than many reported CV adsorbents. Notably, the regenerated cryogel could be easily reused with high adsorption capacity for at least five cycles. This work provided a facile avenue to develop sustainable cryogel adsorbent for deep cleaning of CV in wastewater.