Synthesis of sulfhydryl chitin and its adsorption properties for heavy metal ions

✍ Scribed by Yumin Yang; Jian Shao

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 139 KB
• Volume: 77
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000705)77:1<151::aid-app20>3.0.co;2-w

✦ Synopsis

This article discusses the preparation of the water-insoluble adsorbent sulfhydryl chitin (s-chitin), by treatment of the chitin with sulfhydryl acetic acid in the presence of sulfuric acid as a catalyst. Its structure was confirmed by elemental analysis, FTIR spectra analysis and near-IR spectra analysis. We also investigated the adsorption properties of sulfhydryl chitin for Cu II , Cd II , Pb II , Cr III , and Ni II . Based on the research results of adsorption capacity, the effect of pH value on adsorption, adsorption kinetics experiments, and selective adsorption experiments were observed. It has been shown that the s-chitin has much better adsorption for Pb II , Cu II , and Cd II than chitin itself. The adsorption capacities of s-chitin for Pb II , Cu II , and Cd II were 108.3, 94.7, and 57.1 mg/g, respectively. It also had good adsorption properties for heavy metal ions. The adsorption capacities were also affected by the acidity of medium. The adsorbed Cu II , Cd II , and Pb II could be eluted by diluted chlorhydric acid.