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

机译：巯基几丁质的合成及其对重金属离子的吸附性能

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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, CuII, and CdII 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. (C) 2000 John Wiley & Sons, Inc. [References: 6]
机译：本文讨论了在硫酸作为催化剂存在下，用巯基乙酸处理几丁质，制备水不溶性吸附剂巯基几丁质（s-几丁质）的方法。通过元素分析，FTIR光谱分析和近红外光谱分析确认了其结构。我们还研究了巯基几丁质对Cu-II，Cd-II，Pb-II，Cr-III和Ni-II的吸附性能。根据吸附容量的研究结果，观察了pH值对吸附的影响，吸附动力学实验和选择性吸附实验。已经显示，s-几丁质对Pb-II，CuII和CdII的吸附比几丁质本身更好。 s-几丁质对Pb-II，Cu-II和Cd-II的吸附容量分别为108.3、94.7和57.1 mg / g。它还具有对重金属离子的良好吸附性能。吸附能力也受介质酸度的影响。吸附的Cu-II，Cd-II和Pb-II可用稀盐酸洗脱。 （C）2000 John Wiley＆Sons，Inc. [参考：6]

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