Evaluation of removal of chromium (III) by composite porous adsorbents materials of PE-g-MA, coconut fiber and chitosan using experimental design

ABSTRACT Adsorption processes can be employed in the treatment of wastewater containing heavy metals to reduce environmental damage. However, the high cost of adsorbent materials justifies the application of alternative adsorbents, such as coconut fiber (CF) and chitosan (C). Thus, this study aimed to develop porous composite adsorbents from the mixture of grafted maleic anhydride polyethylene/CF/C/NaCl, as porogen agent (PE-g-MA/CF/C/NaCl), and evaluate statistically adsorption capacity of chromium (III) solution, with the aid of software Statistica 5.0®. The results showed that the process efficiency was influenced by the size of the CF, the content of C and the pH of the solution containing Cr (III). The maximum removal capacity of Cr (III) per unit mass of the composite was 42.28 mg.g-1.

摘要 吸附工艺可用于含重金属废水的处理以降低环境损害。然而，吸附剂材料的高昂成本使得开发替代吸附剂具备合理性，例如椰壳纤维（coconut fiber，CF）与壳聚糖（chitosan，C）。因此，本研究以马来酸酐接枝聚乙烯/椰壳纤维/壳聚糖/氯化钠（氯化钠作为致孔剂，即PE-g-MA/CF/C/NaCl）为原料制备多孔复合吸附剂，并借助Statistica 5.0®软件对三价铬（chromium(III)，Cr(III)）溶液的吸附性能开展统计学评价。结果表明，该吸附工艺的效率受椰壳纤维粒径、壳聚糖含量以及三价铬溶液pH值的影响。该复合吸附剂对三价铬的最大单位质量吸附容量可达42.28 mg·g⁻¹。