ABSTRACT

A chemically modified-biosorbent was prepared by attaching dithizone onto Salacca zalacca skin waste for Hg²⁺ bioremoval. The material was synthesized by refluxing dithizone 5% with the Salacca zalacca skin powder followed by drying. The material was characterized through scanning electron microscopy, gas sorption analysis, and Boehm titration. The applicability of the material as biosorbent was tested for Hg²⁺ adsorption at room temperature. Findings suggested that the modification altered the surface properties of the biosorbent as indicated by the increased values for such surface parameters as specific surface area, pore volume, and quantitative functional groups. Particularly, the material demonstrated a high removal efficiency during Hg²⁺ adsorption, which fit the pseudo-second-order kinetics. The removal efficiency of Hg²⁺ was not influenced by the adsorbent dosage of 1–4 g/L.

摘要

通过将双硫zone附着在Salacca zalacca皮肤废料上以去除Hg ^2+的方法制备了化学修饰的生物吸附剂。该材料是通过将5％双硫th与Salacca zalacca皮肤粉末回流，然后干燥而合成的。通过扫描电子显微镜，气体吸附分析和Boehm滴定对材料进行表征。测试了该材料作为Hg ^2+的生物吸附剂的适用性在室温下吸附。发现表明该修饰改变了生物吸附剂的表面性质，如比表面积，孔体积和定量官能团等表面参数的值增加所表明。特别地，该材料在Hg ²⁺吸附过程中表现出很高的去除效率，这符合拟二级动力学。Hg ²⁺的去除效率不受1-4 g / L吸附剂剂量的影响。