有机阴离子染料是主要的水污染物,因为它们是由复杂的芳族结构引起的低降解性。它们不仅具有毒性,诱变,致畸,致瘤性,和基因毒性作用,但它们也会降低生育能力,并对人类的皮肤和呼吸系统造成刺激。这种长期毒性对水生生物及其周围环境有有害影响,导致生态系统不平衡。在这项研究中,合成了Cs@Fe3O4磁性生物吸附剂以吸收三种阴离子染料,并进行了FTIR表征,BET/BJH,XRD,TGA,VSM,和FESEM分析。确认生物吸附剂平均表面积为52.6524m2/g,吸附-解吸过程的平均孔径为7.3606nm和6.9823nm,分别。批量吸附研究pH值,接触时间,温度,初始染料浓度,和吸附剂剂量进行了检查。研究了几种等温线和动力学模型以确定吸附机理。观察到这些染料在平衡时的吸附数据与Langmuir的等温线和伪二级动力学模型相匹配。热力学研究表明,这些染料的吸附过程是放热反应。刚果红的最大吸附能力,甲基橙,甲氨酚黄为117.77毫克/克,137.77mg/g,155.57mg/g,分别。对染料吸附后回收的Cs@Fe3O4的可重用性进行了多达五个连续的吸附-解吸循环的评估,以用于其可能的工业应用。
Organic anionic
dyes are major water pollutants due to their low degradability caused by complex aromatic structures. Not only do they exert toxic, mutagenic, teratogenic, tumorigenic, and genotoxic effects, but they also decrease fertility and cause irritation to the skin and respiratory system in humans. This long-term toxicity has detrimental effects on aquatic organisms and their surroundings, resulting in an imbalanced ecosystem. In this study, a Cs@Fe3O4 magnetic biosorbent was synthesised to uptake three anionic
dyes and characterised for FTIR, BET/BJH, XRD, TGA, VSM, and FESEM analyses. The biosorbent average surface area was confirmed to be 52.6524 m2/g, with average pore sizes of 7.3606 nm and 6.9823 nm for adsorption-desorption processes, respectively. Batch adsorption studies pH values, contact times, temperature, initial dye concentrations, and adsorbent dosages were examined. Several isotherm and kinetic models were studied to determine the adsorption mechanism. The adsorption data of these
dyes at equilibrium was observed to match Langmuir\'s isotherm and pseudo-second-order kinetic models. The thermodynamic study revealed that the adsorption process for these
dyes was an exothermic reaction. Maximum adsorption capacities for congo red, methyl orange, and metanil yellow were 117.77 mg/g, 137.77 mg/g, and 155.57 mg/g, respectively. The reusability of recovered Cs@Fe3O4 after dye adsorption was evaluated up to five continuous adsorption-desorption cycles for its possible industrial applications.