Natural hydroxyapatite powder from pig-bone waste (pHAP) for the rapid adsorption of heavy metals (Cu) in aqueous solution

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2024-04-14 DOI:10.1007/s10450-024-00471-w

Ling Shi, Zhongkui Zhu, Nana Wu, Yufeng Chang, Lin Yue, Liang An

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引用次数: 0

Abstract

Copper ions are prevalent in the natural environment and possess toxicity as heavy metal ions. The removal of Cu²⁺ from aqueous solutions can be achieved through adsorption, which is considered a straightforward method. In this study, we employed a facile approach to synthesize pig-bone hydroxyapatite material (pHAP), and the synthesized materials were subjected to characterization using XRD, SEM, FTIR, and BET techniques. The results showed that pHAP has a pure HAP structure, and the surface of HAP has a certain porosity, which provides good conditions for the adsorption of copper ions. Batch adsorption equilibrium experiments were conducted to investigate the various influencing factors, adsorption kinetics, and isotherms. The findings revealed that the optimal adsorption condition of Cu²⁺ (50 mg/L) on pHAP was pH 7, 318.15 K, the maximum adsorption capacity was 50.25 mg/g, and the adsorption capacity was superior to some adsorbents of the same type. Moreover, it can retain 74.15% of its reusability after being reused 5 times. The adsorption mechanism primarily involves monolayer adsorption through chemical processes, particularly ion exchange, coprecipitation, and complexation reactions. Therefore, pHAP has industrial application potential in the field of copper ion adsorption.

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用于快速吸附水溶液中重金属（铜）的猪骨废弃物天然羟基磷灰石粉（pHAP）

铜离子普遍存在于自然环境中，作为重金属离子具有毒性。从水溶液中去除 Cu2+ 可通过吸附来实现，这是一种简单易行的方法。本研究采用简便的方法合成了猪骨羟基磷灰石材料（pHAP），并利用 XRD、SEM、FTIR 和 BET 技术对合成材料进行了表征。结果表明，pHAP 具有纯净的 HAP 结构，HAP 表面具有一定的孔隙率，这为铜离子的吸附提供了良好的条件。批量吸附平衡实验研究了各种影响因素、吸附动力学和等温线。实验结果表明，Cu2+（50 mg/L）在 pHAP 上的最佳吸附条件为 pH 7、318.15 K，最大吸附容量为 50.25 mg/g，吸附能力优于一些同类吸附剂。此外，在重复使用 5 次后，它还能保持 74.15% 的重复利用率。其吸附机理主要是通过化学过程，特别是离子交换、共沉淀和络合反应进行单层吸附。因此，pHAP 在铜离子吸附领域具有工业应用潜力。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.