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林产化学与工业 ›› 2023, Vol. 43 ›› Issue (2): 143-152.doi: 10.3969/j.issn.0253-2417.2023.02.018

• 研究报告 • 上一篇    下一篇

两性纤维素基吸附剂的制备及其对水体中氮磷污染物的去除

孙英南1, 刘苏珍1,2, 李海明1, 周景蓬3, 张凤山3, 郭延柱1,3,*()   

  1. 1. 大连工业大学 轻工与化学工程学院; 辽宁省生物质化学与材料重点实验室; 辽宁木质纤维生物质精炼协同创新中心, 辽宁 大连 116034
    2. 山东工业技师学院 海洋生化系, 山东 潍坊 261053
    3. 华泰集团有限公司, 山东 东营 257335
  • 收稿日期:2022-02-28 出版日期:2023-04-28 发布日期:2023-04-26
  • 通讯作者: 郭延柱 E-mail:guoyz@dlpu.edu.cn
  • 作者简介:郭延柱,教授,博士生导师,研究领域为生物质基多功能材料的研发及利用、生物质精炼技术的研究、木质素基工业化产品等;E-mail: guoyz@dlpu.edu.cn
    孙英南(1997—),男,河北承德人,硕士生,研究方向为生物质基功能材料

Preparation of Amphoteric Cellulose Based Adsorbent and Its Removal of Nitrogen and Phosphorus Pollutants from Wastewater

Yingnan SUN1, Suzhen LIU1,2, Haiming LI1, Jingpeng ZHOU3, Fengshan ZHANG3, Yanzhu GUO1,3,*()   

  1. 1. College of Light Industry and Chemical Engineering, Dalian Polytechnic University; Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials; Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, Dalian 116034, China
    2. Department of Marine Biochemistry, Shandong Industrial Technician College, Weifang 261053, China
    3. Huatai Group Co. Ltd., Dongying 257335, China
  • Received:2022-02-28 Online:2023-04-28 Published:2023-04-26
  • Contact: Yanzhu GUO E-mail:guoyz@dlpu.edu.cn

摘要:

以纤维素为原料,以甲基丙烯酰氧乙基三甲基氯化铵(METAC)、丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基-1-丙烷磺酸(AMPS)为单体,过硫酸钾为引发剂,通过一步自由基聚合法制备得到两性纤维素基共聚物(CO-AC)吸附剂。采用元素分析仪、红外光谱(FT-IR)仪对CO-AC的结构与性能进行了表征,发现季胺基、酰胺基和磺酸基等活性基团成功被引入到纤维素分子链中。以CO-AC对NH4+和H2PO4-的去除率和平衡吸附量为考核指标,对吸附条件进行了优化,探讨了不同因素对吸附效果的影响。研究结果表明:当纤维素葡萄糖单元与AMPS、AM和METAC的物质的量之比为1∶2∶3∶3时,制备的吸附剂吸附效果最佳。在50 mL质量浓度为150 mg/L的NH4+和H2PO4-溶液中,当CO-AC添加量为100 mg,pH值为7时,对NH4+的最大吸附量为77.4 mg/g;当CO-AC添加量为100 mg,pH值为5时,对H2PO4-的最大吸附量为61.2 mg/g。CO-AC对NH4+和H2PO4-的吸附过程较好地符合准二级动力学模型、粒子内部扩散模型和Langmuir模型,说明化学吸附和粒子内部扩散过程是主要的限速步骤,吸附过程是均匀的单分子层吸附。

关键词: 纤维素, 改性, 两性吸附剂, 氮磷吸附

Abstract:

Amphoteric cellulose copolymers(CO-AC) adsorbents were prepared though free radical polymerization in one-pot process using cellulose as raw material and methacryloxyethyl trimethyl ammonium chloride(METAC), acrylamide(AM), 2-acryloamino-2-methyl-1-propane sulfonic acid(AMPS) as monomers and potassium persulfate as initiator. The structure and properties of CO-AC were characterized by elemental analyzer and fourier infrared spectrometer(FT-IR). It was found that active groups, e.g., quaternary amine, amide and sulfonic acid group were successfully introduced into the molecular chains of cellulose. Taking the removal rate and equilibrium adsorption capacity of CO-AC to NH4+ and H2PO4- as the evaluation indexes, the adsorption conditions were optimized and the influence of various factors on the adsorption capacity of CO-AC were also evaluated. The results showed that the adsorption capacity of the adsorbent, derived under the conditions of 1:2:3:3 molar ratio of cellulose glucose unit to AMPS, AM and METAC, was the best. In 50 mL of NH4+ and H2PO4- solution with a mass concentration of 150 mg/L, the maximum adsorption capacity of NH4+ was 77.4 mg/g when the addition amount of CO-AC was 100 mg and pH value was 7.0. The maximum adsorption capacity of H2PO4- was 61.2 mg/g, while the addition amount was 100 mg and the pH value was 5.0. The adsorption process of NH4+ and H2PO4- on CO-AC was well characterized by the quasi-second-order kinetic, internal diffusion of particle and Langmuir models, indicating that chemisorption and internal particle diffusion processes were the main rate-limiting steps, and the adsorption process was homogeneous monolayer adsorption.

Key words: cellulose, modification, amphoteric adsorbent, ammonium and phosphorus adsorption

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