At present, water pollution becomes a very significant environmental issue. Heavy metals and organic dyes present at higher concentrations in water are dangerous for aquatic life and humanity. Chitosan nanocomposites have been used for the adsorptive removal of heavy metals and dyes due to their improved chemical activity. This paper encompassed the synthesis of chitosan-nSiO₂ nanocomposites and was used to examine Cu(II) ion removal capability. The chitosan/nSiO₂ nanocomposite (CSNC) adsorbents were synthesized with different weight ratios. The nanocomposites are characterized by using SEM, EDX, BET apparatus, FTIR, XRD, and TGA. The experiment is performed in batch mode by varying the operating parameters like pH, contact time, temperature, adsorbent dosage, and initial metal ion concentration. The optimum pH is 6.5 for all adsorbents. Different kinetic and isotherm models are tried. The removal efficiency was greater than 98% for the adsorbent CSNC2–1. The pseudo-2nd-order model described the kinetic process better than other models. Equilibrium data fit the best in Fritz and Schluender (IV) isotherm model for the adsorbents CWS and CSNC2–1 and Vieth and Sladek isotherm model CSNC1–1. The adsorption process was spontaneous and endothermic. Industrial effluent is also tested successfully. The application of statistical and GA modeling has also been performed successfully.

目前，水污染已成为一个非常重要的环境问题。水中浓度较高的重金属和有机染料对水生生物和人类都是危险的。壳聚糖纳米复合材料由于其改善的化学活性而已用于吸附去除重金属和染料。本文涵盖了壳聚糖-n SiO ₂纳米复合材料的合成，并用于检验Cu（II）离子的去除能力。壳聚糖/ n SiO ₂以不同的重量比合成了纳米复合材料（CSNC）吸附剂。通过使用SEM，EDX，BET装置，FTIR，XRD和TGA来表征纳米复合材料。通过更改操作参数（例如pH值，接触时间，温度，吸附剂剂量和初始金属离子浓度）以分批方式进行实验。所有吸附剂的最佳pH值为6.5。尝试了不同的动力学和等温线模型。吸附剂CSNC2-1的去除效率大于98％。伪二阶模型比其他模型更好地描述了动力学过程。对于吸附剂CWS和CSNC2-1和Vieth和Sladek等温模型CSNC1-1，平衡数据最适合Fritz和Schluender（IV）等温模型。吸附过程是自发的并且是吸热的。工业废水也已成功测试。