化工进展 ›› 2019, Vol. 38 ›› Issue (02): 1075-1084.DOI: 10.16085/j.issn.1000-6613.2018-0885

• 精细化工 • 上一篇    下一篇

牛血清白蛋白纳米球接枝杨梅单宁的制备以及吸附去除水体中Pb2+的性能

冯健1(),余杰1,周建1,2(),张永德2,林晓艳2,罗学刚1,2   

  1. 1. 西南科技大学生命科学与工程学院,四川 绵阳 621010
    2. 西南科技大学生物质教育部工程研究中心,四川;绵阳 621010
  • 收稿日期:2018-04-28 修回日期:2018-06-22 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: 周建
  • 作者简介:<named-content content-type="corresp-name">冯健</named-content>(1996—),男,本科生。E-mail:<email>1764503194@qq.com</email>。|周建,副研究员,硕士生导师,研究方向为生物质化学与工程。E-mail:<email>zhoujian@swust.edu.cn</email>。
  • 基金资助:
    国家自然科学基金(21406182);四川省教育厅科研项目(17ZB0443);核废物与环境安全国防重点学科开放基金(15kffk02)

Removal of Pb2+ from aqueous solution using bovine serum albumin nanospheres grafted with bayberry tannin

Jian FENG1(),Jie YU1,Jian ZHOU1,2(),Yongde ZHANG2,Xiaoyan LIN2,Xuegang LUO1,2   

  1. 1. School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
    2. Biomass Engineering Research Center of the Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
  • Received:2018-04-28 Revised:2018-06-22 Online:2019-02-05 Published:2019-02-05
  • Contact: Jian ZHOU

摘要:

采用去溶剂法和杨梅单宁-戊二醛固化接枝制备得到杨梅单宁(BT)接枝牛血清白蛋白(BSA)纳米球(BSA-BT-NSs)吸附材料,并系统探讨了其在不同吸附条件下对水体中Pb2+的吸附去除性能。研究结果表明:50%用量杨梅单宁(基于BSA-NSs量)接枝固化得到的BSA-BT-NSs具有较好的球形结构和良好的分散性。在吸附实验中,Pb2+初始浓度为250mg/L、pH 5.0、温度为298K 条件下吸附20min,BSA-BT-NSs(0.4g/L)对Pb2+的吸附效果最佳,最大吸附容量为76mg/g,优于多数同类型吸附材料。BSA-BT-NSs对Pb2+吸附过程符合Langmuir方程和准二级吸附动力学模型,且吸附后的BSA-BT-NSs经0.1mol/L 硝酸进行解吸取得了92.04%的良好解吸效果,并可再次重复使用。进一步分析其Pb2+吸附机理,表明BSA-BT-NSs中的氨基氮原子、羟基和羧基氧原子作为电子供体参与了与Pb2+的空轨道发生配位作用。

关键词: 牛血清白蛋白, 杨梅单宁, 铅离子, 吸附, 纳米球

Abstract:

Bayberry tannin grafted bovine serum albumin nanaopheres (BSA-BT-NSs) were prepared using the desolvent method, and the removal performances of Pb2+ onto BSA-BT-NSs were investigated systematically under different removal conditions, including pH, adsorbent dose, contact time, and initial Pb2+ concentration. The results showed that BSA-BT-NSs dispersed uniformly having a good spherical structure grafting with 50% of bayberry tannin (based on the amount of BSA-NSs). The maximum adsorption capacity of BSA-BT-NSs for Pb2+ reached up to 76mg/g using 0.4g/L of adsorbent dosage to treat the Pb2+ containing solution with the initial concentration of 250mg/L at pH 5.0 and 298K for 20min.The adsorption processes of Pb2+ onto BSA-BT-NSs were well-fitted to Langmuir model and pseudo-secondary adsorption kinetics model, indicating a single layer chemical adsorption. A desorption efficiency of 92.04% was obtained using 0.1mol/L nitric acid as eluent to carry out the desorption experiments of Pb2+ on BSA-BT-NSs, which could be reused. Furthermore, nitrogen on amino, oxygen on hydroxyl and carboxyl of BSA-BT-NSs were involved as electron donors to form coordination complexes with the empty orbital of Pb2+.

Key words: bovine serum albumin, bayberry tannin, lead ions, adsorption, nanospheres

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