Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul, Tamil Nadu 624 302, India; Department of Chemistry, Pocker Sahib Memorial Orphanage College, Tirurangadi, Malappuram, Kerala 676306, India.
Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul, Tamil Nadu 624 302, India.
Int J Biol Macromol. 2021 Apr 1;175:361-371. doi: 10.1016/j.ijbiomac.2021.02.024. Epub 2021 Feb 6.
In this study, alginate reinforced reduced graphene oxide@hydroxyapatite (rGO@HAP-Alg) hybrids have been fabricated via co-precipitation technique. The developed adsorbent was effectively utilized for the removal of Reactive Blue 4 (RB4), Indigo Carmine (IC) and Acid Blue 158 (AB158) azo dyes from aqueous solution, and found to have the adsorption efficiency of 45.56, 47.16 and 48.26 mg/g, respectively. The thermodynamic parameters demonstrated the endothermic and spontaneous nature of the adsorption process. The adsorption system was pH-dependent and showed maximum dye removal at pH 6-7, which was indicative of the electrostatic interactions, surface complexation and the hydrogen bonding mechanisms involved between the adsorbate and adsorbent during the adsorption process. Furthermore, the renewability studies demonstrated the reusability and stability of rGO@HAP-Alg hybrids up to five successive cycles. This study delivers a promising strategy for removing dye molecules and extends the potential application of rGO@HAP-Alg hybrids to treat practical dye contaminated water/wastewater.
在这项研究中，通过共沉淀技术制备了藻酸盐增强的还原氧化石墨烯@羟基磷灰石（rGO@HAP-Alg）杂化物。所开发的吸附剂有效地用于从水溶液中去除活性蓝 4（RB4）、靛蓝胭脂红（IC）和酸性蓝 158（AB158）偶氮染料，其吸附效率分别为 45.56、47.16 和 48.26 mg/g。热力学参数表明吸附过程是吸热和自发的。吸附体系对 pH 值敏感，在 pH 6-7 时表现出最大的染料去除率，这表明在吸附过程中吸附质和吸附剂之间存在静电相互作用、表面络合和氢键机制。此外，可再生性研究表明 rGO@HAP-Alg 杂化物在五个连续循环中具有可重复使用性和稳定性。本研究为去除染料分子提供了一种有前途的策略，并扩展了 rGO@HAP-Alg 杂化物在处理实际染料污染水/废水方面的潜在应用。
