纸基吸附-分离材料的制备及其应用性能

田寒; 蒋珊; 奚建锋; 吉兴香; 戴红旗; 吴伟兵

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Preparation and Application of Paper-based Adsorption-Separation Materials

Received:March 10, 2021

DOI：10.11981/j.issn.1000-6842.2021.04.48

Key Words:paper-based adsorption-separation materials;high wet strength;heavy metal ions;adsorption;oil-water separation

Fund Project:生物基材料与绿色造纸国家重点实验室开放基金（KF201804）。

Author Name	Affiliation	Postcode
TIAN Han	State Key Laboratory of Bio-based Materials and Green Papermaking， Qilu University of Technology， Shandong Academy of Sciences， Ji'nan， Shandong Province， 250353 Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
JIANG Shan	Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
XI Jianfeng	Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
JI Xingxiang	State Key Laboratory of Bio-based Materials and Green Papermaking， Qilu University of Technology， Shandong Academy of Sciences， Ji'nan， Shandong Province， 250353	250353
DAI Hongqi	Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037
WU Weibing	State Key Laboratory of Bio-based Materials and Green Papermaking， Qilu University of Technology， Shandong Academy of Sciences， Ji'nan， Shandong Province， 250353 Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037	210037

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Abstract:

Based on papermaking technology， paper-based adsorption-separation material with low cost， reusability， high adsorption capacity on heavy metal ions， and high efficiency on oil-water separation was prepared using poplar chemical pulp as raw material and citric acid as modification reagent. The treatment of citric acid increases both the crosslinking degree between fibers and carboxyl group content， thus improving the wet strength and increasing the adsorption sites of heavy metal ion of the paper-based adsorption-separation materials. The results showed that the wet tensile index of the paper-based adsorption-separation materials was 40%~50% of their dry tensile index， and the maximum carboxyl group content reached 0.66 mmol/g. With an increase in the concentration of citric acid， the adsorption capacities of heavy metal ions increased significantly. The adsorption kinetics and thermodynamics well fitted the quasi-second-order equation and Langmuir model （correlation coefficient R²≥0.998）， and the theoretical maximum adsorption capacity of the paper-based adsorption-separation materials on Cu²⁺ and Pb²⁺ reached 44.29 and 132.1 mg/g， respectively. Moreover， the hydrophilicity of the adsorption-separation materials was favored by its high carboxyl group content， endowing it with excellent oil-water separation property （with the maximum underwater oil contact angle >155°， separation efficiency of 99.8%）. It was therefore concluded that the low-cost paper-based adsorption-separation materials could remove heavy metal ion and separate oil and water simultaneously， and was of an important application prospect in the field of industrial wastewater treatment.

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