Emerging Materials for Energy and Environmental Applications Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Viet Nam.
Department of Biotechnology, Hindusthan College of Arts and Science, Coimbatore, 641028, Tamil Nadu, India.
Food Chem Toxicol. 2022 Oct;168:113346. doi: 10.1016/j.fct.2022.113346. Epub 2022 Aug 6.
Textile industry is the major backbone of economy of the developing countries. The major problems associated in the textile factories are release of undesired dye effluents, which is a potential pollution risk for human health as well as the environmental aquatic system. The objective of this study was fabrication of a novel composite to treat textile industry effluents in an ecofriendly manner. In this context, hydroxyapatite (HAp) was derived from the mussel shell biowaste and fabricated with chitosan-sodium alginate through the in-situ method. The prepared HAp/CS-SA composite was physicochemically characterized by using Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX) and High Resolution-Transmission Electron Microscope (HR-TEM). The photocatalytic activity of the HAp/CS-SA composite was evaluated by using Congo red (CR), Malachite green (MG) and Methylene blue (MB) as model dyes for degradation in aqueous solutions under solar irradiation. The degradation rate was recorded as CR (88%), MG (81%) and MB (93%) respectively within 75 min of irradiation. The degraded end products were subjected to toxicity assessment by evaluating the phytotoxicity on seed germination of Vigna radiata plant in pot study. The degraded end products were also tested for toxic inhibition of E. coli and P. aeruginosa by agar well diffusion method. The prepared HAp/CS-SA composite had an enhanced photocatalytic activity due to the presence of natural biopolymers and their biological properties. HAp/CS-SA composite showed potential dye degradation properties and it could be effective for dye removal from industrial wastewaters.
纺织业是发展中国家经济的主要支柱。纺织厂存在的主要问题是释放不理想的染料废水，这对人类健康和环境水生系统构成了潜在的污染风险。本研究的目的是制备一种新型复合材料，以环保的方式处理纺织工业废水。在这种情况下，从贻贝壳生物废料中提取羟基磷灰石（HAp），并通过原位法与壳聚糖-海藻酸钠一起制备。通过傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、场发射扫描电子显微镜与能量色散 X 射线光谱（FESEM-EDX）和高分辨率-透射电子显微镜（HR-TEM）对制备的 HAp/CS-SA 复合材料进行物理化学表征。通过使用刚果红（CR）、孔雀石绿（MG）和亚甲基蓝（MB）作为模型染料在水溶液中进行光催化降解，评估 HAp/CS-SA 复合材料的光催化活性。在照射 75 分钟内，分别记录 CR（88%）、MG（81%）和 MB（93%）的降解率。将降解的最终产物进行毒性评估，通过评估 Vigna radiata 植物在盆栽研究中的种子发芽的植物毒性。还通过琼脂孔扩散法测试降解的最终产物对大肠杆菌和铜绿假单胞菌的毒性抑制作用。由于天然生物聚合物的存在及其生物特性，制备的 HAp/CS-SA 复合材料具有增强的光催化活性。HAp/CS-SA 复合材料表现出潜在的染料降解性能，可有效去除工业废水中的染料。
