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Application of Cellulose-Based Solid Acid in Absorption of Heavy Metal Ions from Printing Waste Water

机译:纤维素基固体酸在印刷废水中重金属离子吸收中的应用

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摘要

Traditional printing (lithography, gravure, letterpress, PCB etc.) produce a large of industrial wastewater from washing printing plate, rubber cloth and circuit boards corrosion. These waste water mainly contain copper ion and silver ions, which is difficult to process under acid condition. Taking effective methods to remove the metal ions in waste water has become a hotspot in research. In this paper, cellulose-based solid acid (CCSA) was prepared using microcrystalline cellulose and 98% concentrated sulfuric acid as raw materials. The characterization of CCSA was first analyzed by acid strength and Fourier-transform infrared spectrometer (FTTR). Infrared spectrogram display that sulfonic group was successfully connected on cellulose-base. Acid value measurement indicates that the total acidic group of CCSA decline from 1.87 to 1.02 mmol/g with carbonization temperature rise. Subsequently, effects of carbonization temperature on adsorption performance to Cu~(2+) and Ag~+ were investigated. The result shows that carbonization temperature at 400 ℃ reach best absorptivity of 80 mg/g (Cu~(2+)) and 247 mg/g (Ag~+) respectively. However, with carbonization temperature rise to 600 ℃ absorption quantity was just 66 mg/g (Cu~(2+)) and 158 mg/g (Ag~+) respectively.
机译:传统印刷(光刻,凹版印刷,凸版印刷,PCB等)会因清洗印刷版,橡皮布和电路板而产生大量工业废水。这些废水主要含有铜离子和银离子,在酸性条件下难以处理。采取有效的方法去除废水中的金属离子已成为研究的热点。本文以微晶纤维素和98%浓硫酸为原料制备了纤维素基固体酸(CCSA)。首先通过酸强度和傅立叶变换红外光谱仪(FTTR)分析CCSA的特征。红外光谱图显示,磺酸基已成功连接到纤维素基上。酸值测量表明,随着碳化温度的升高,CCSA的总酸性基团从1.87降至1.02 mmol / g。随后,研究了碳化温度对Cu〜(2+)和Ag〜+吸附性能的影响。结果表明:400℃的碳化温度分别达到最佳吸收率80 mg / g(Cu〜(2+))和247 mg / g(Ag〜+)。然而,随着碳化温度升高到600℃,吸收量分别仅为66 mg / g(Cu〜(2+))和158 mg / g(Ag〜+)。

著录项

  • 来源
  • 会议地点 Beijing(CN)
  • 作者单位

    College of Printing and Packaging Engineering, Qilu University of Technology, Shandong, China,Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, China;

    College of Printing and Packaging Engineering, Qilu University of Technology, Shandong, China,Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, China;

    College of Printing and Packaging Engineering, Qilu University of Technology, Shandong, China,Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, China;

    College of Printing and Packaging Engineering, Qilu University of Technology, Shandong, China,Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, China;

    College of Printing and Packaging Engineering, Qilu University of Technology, Shandong, China,Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solid acid; Adsorbent; Heavy metal ions;

    机译:固体酸吸附剂重金属离子;

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