Cumhuriyet University, Faculty of Science, Department of Chemistry, 58140 Sivas, Turkey.
Cumhuriyet University, Faculty of Health Sciences, Department of Nutrition and Diet, 58140 Sivas, Turkey.
Int J Biol Macromol. 2023 Dec 31;253(Pt 1):126632. doi: 10.1016/j.ijbiomac.2023.126632. Epub 2023 Aug 30.
Chitosan (Ch)-diatomite (D) composite beads (Ch-D) were synthesized using epichlorohydrin and tripolyphosphate crosslinkers and then moulded into uniform beads in tripolyphosphate solution. FT-IR and SEM-EDX analyses showed that Ch-D composite adsorbent was successfully synthesized by functionalization of chitosan to Ch-D by hydrogen bonding and electrostatic interactions and improved adsorption capacity for removal of Allura red AC (AR) food dye. The removal rate of AR food dye was found to be 98 % at 25 °C, natural AR dye pH value, 24 h, and at the initial AR dye concentration of 200 mg L. The maximum adsorption capacity was found to be 34.7 mg g. It was observed that π-π interactions, hydrogen bonds, and electrostatic interactions between the functional groups containing oxygen and amine on the surface of the Ch-D composite and the functional groups of the anionic AR dye, and AR dye adsorption via complexation took place. In light of all this information, the Ch-D composite adsorbent is a promising potential material for the effective treatment of colored pollutants from wastewater.
壳聚糖（Ch）-硅藻土（D）复合珠（Ch-D）是使用表氯醇和三聚磷酸酯交联剂合成的，然后在三聚磷酸酯溶液中模制成均匀的珠。FT-IR 和 SEM-EDX 分析表明，壳聚糖通过氢键和静电相互作用功能化到 Ch-D 上，成功合成了 Ch-D 复合吸附剂，并提高了对去除诱惑红 AC（AR）食品染料的吸附能力。在 25°C、天然 AR 染料 pH 值、24 小时和初始 AR 染料浓度为 200mg/L 的条件下，AR 食品染料的去除率为 98%。最大吸附容量为 34.7mg/g。观察到，Ch-D 复合吸附剂表面含氧和胺的官能团与阴离子 AR 染料的官能团之间存在π-π相互作用、氢键和静电相互作用，并且通过络合发生了 AR 染料的吸附。有鉴于此，Ch-D 复合吸附剂是一种很有前途的潜在材料，可有效处理废水中的有色污染物。
