文献类型：期刊文献

英文题名：Smart and functional polyelectrolyte complex hydrogel composed of salecan and chitosan lactate as superadsorbent for decontamination of nickel ions

作者：Hu, Xinyu[1,2,3,4,5] Yan, Linlin[1,2,6] 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;[6]Beijing Technol & Business Univ, Beijing Key Lab Plant Resource Res & Dev, Beijing 100048, Peoples R China

年份：2020

卷号：165

起止页码：1852-1861

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20242616410613);Scopus(收录号：2-s2.0-85096476706);WOS:【SCI-EXPANDED(收录号:WOS:000600773500025)】；

基金：This work was supported by the Fundamental Research Funds of CAF under the Grant CAFYBB2020QB007, theNational Natural Science Foundation of China under the Grant 31700500, the Key Lab. of Biomass Energy andMaterial, Jiangsu Province (KLBEM) under the Grant JSBEM-S-201904, and the Open Research Fund Program of Beijing Key Lab of Plant Resource Research and Development, Beijing Technology and Business University under the Grant PRRD-2018-YB8.

语种：英文

外文关键词：Smart PEC hydrogel; Salecan; Chitosan lactate; Electrostatic attractions; Monolayer chemisorption mechanism; Deep cleaning of Ni2+

摘要：Green and functional bio based adsorbents based on naturally derived polysaccharides have attracted considerable interest owing to their non-toxicity, biodegradability, flexible design, and wide origins. Here, smart polyelectrolyte complex (PEC SC1-SC4) hydrogels were developed by self-assembling of different ratios of salecan and chitosan lactate (CL) for clean-up of nickel ion (Ni2+) from wastewater. Preparation process was rapid and eco-friendly, without any toxic cross-linkers. The electrostatic attractions between polysaccharides were studied by FT-IR, XRD, XPS, and TGA. Particularly, the content of salecan and CL could be precisely modulated to tailor the swelling ability, micromorphology, and stiffness of the hydrogels. Ni2+ adsorption onto the hydrogels was dependent on salecan/CL ratio, pH, initial ion concentration, and contact time. SC4 showed the highest Ni2+ uptake, but it was too brittle. SC3 was selected for absorption studies. The equilibrium adsorption data commendably matched the pseudo-second-order and Langmuir models, demonstrating monolayer chemical adsorption mechanisms. The maximum Ni2+ adsorption derived from Langmuir model was 414.9 mg/g, superior to many reported Ni2+ adsorbents. Most strikingly, SC3 performed good recyclability, and the adsorption capacity still kept 95.3% even after five adsorption/desorption cycles. Hopefully, the prepared SC3 hydrogel is a potential agent for treatment of wastewater contaminated with Ni2+ ion. (c) 2020 Elsevier B.V. All rights reserved.