Oyster shell derived hydroxyapatite microspheres as an effective adsorbent for remediation of Coomassie brilliant blue

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Japan, 2022-02, Vol.33 (2), p.103425, Article 103425
• Main Authors: Wang, Hongbo, Xing, Huaran, Yan, Kuangqi, Han, Duiwen, Chen, Jingdi
• Format: Article
• Language: English
• Subjects: Adsorption; Coomassie Brilliant Blue; Hydrothermal method; Hydroxyapatite microspheres; Oyster shell wastes
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2022.103425

[Display omitted] •Converting oyster shell wastes into hydroxyapatite (HA) by simple hydrothermal method.•HA have efficient adsorption capacity and reusability for Coomassie brilliant blue (CBB)•Investigated the mechanism and influencing factors of the preparation of HA.•The adsorption of CBB by HA is spontaneous and endothermic process. Discharging of dyestuff is one of the most important causes of water pollution, which could cause severe threat to human health and environment. Hydroxyapatite (HA) is an effective and potential adsorbent to the adsorption of dyestuff. In this study, HA microspheres prepared from oyster shell wastes were used to simulate the removal of Coomassie brilliant blue (CBB) in wastewater. Several effects which can influence the adsorption capacity such as solution pH, initial CBB concentration and temperature were investigated. The maximum adsorption capacity of HA microspheres for CBB can reach 83.8169 mg/g. Thermodynamic analysis shows the adsorption process of CBB by HA microspheres is spontaneous and endothermic because of the negative △G0 and positive △H0. HA has also been proved to have good reusability. This study may provide an economical strategy for the control of oyster shell wastes and an excellent adsorbent for the adsorption of CBB in wastewater.