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Preparation of PEI-modified Paper-based Material and Its Removal Performance on Major Pollutants in Water
Received:November 18, 2021  
DOI:10.11981/j.issn.1000-6842.2022.03.69
Key Words:paper-based materials;wheat straw pulp;metal ions;dye;adsorption;oil-water separation
Fund Project:国家重点研发计划(2019YFC19059003);江苏省自然科学基金(BK20171450);生物基材料与绿色造纸国家重点实验室开放基金(KF201804)。
Author NameAffiliationPostcode
MENG Liucheng Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Forest Product Chemistry and Materials International Innovation Highland, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 210037
ZHANG Yuanyuan Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Forest Product Chemistry and Materials International Innovation Highland, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 210037
JIANG Shan Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Forest Product Chemistry and Materials International Innovation Highland, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 210037
DAI Hongqi Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Forest Product Chemistry and Materials International Innovation Highland, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 210037
WU Weibing Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Forest Product Chemistry and Materials International Innovation Highland, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy), Ji’nan, Shandong Province, 250353)
(*E-mail: wbwu@ njfu.edu.cn 
250353
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Abstract:
      A multi-functional paper-base material with low cost, high wet strength, excellent adsorption and oil-water separation performance was prepared by papermaking process using wheat straw high yield pulp as raw material, glutaraldehyde and polyethylene imine as modification reagents. A large amount of amino groups (3.33 mmol/g) were introduced onto the surface of the as-modified paper-based material and a covalent bond cross-linked network structure was formed between its internal fibers, resulting in a wet tensile index reaching 29% of the corresponding dry tensile index. The adsorption experimental show that the quasi-second-order equation and Langmuir model are well fitted to the adsorption kinetics and thermodynamics of the as-prepared paper-based material towards adsorbates (Congo red and Pb2+) with practical adsorption capacity of 89.26 and 190.1 mg/g, respectively, and the calculated maximum adsorption capacity of 91.04 and 232.4 mg/g, respectively. The under-oil contact angle of the modified paper-based material on soybean oil and n-hexane are 152.5° and 151.7°, respectively, indicating its super-hydrophobicity under water. Moreover, separation efficiency of the modified paper‍-‍based material on oil-in-water emulsion with average particle size of 50 μm reaches 99.4% and its film flux is up to 12560 L/(m2·h).
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