滴定法
吸附
溶解
水溶液
面(心理学)
降水
化学工程
环境友好型
化学
材料科学
核化学
纳米技术
无机化学
有机化学
生态学
心理学
社会心理学
物理
人格
生物
气象学
工程类
五大性格特征
作者
Hee Jung Kim,Jin Hyuk Choi,SangMyeong Lee,Gill Sang Han,Hyun Suk Jung
出处
期刊:ACS omega
[American Chemical Society]
日期:2024-01-02
标识
DOI:10.1021/acsomega.3c07725
摘要
To address the growing concerns regarding severe water pollution, effective and environmentally friendly adsorbents must be identified. In this study, we prepared hydroxyapatite (HAp, Ca10(PO4)6(OH)2) as an eco-friendly absorbent via simple precipitation and obtained rod- (r-HAp) and plate-shaped HAp (p-HAp). The approach to obtaining p-HAp involved a low pH titration rate, promoting growth along the c-axis due to the adsorption of OH- on the (110) facet. Conversely, r-HAp was obtained by maintaining a high concentration of OH- during the initial stage through rapid pH titration, leading to a stronger restrictive effect on the growth of positively charged a(b)-planes. p-HAp demonstrated superior adsorption capacity, removing Pb through dissolution and recrystallization, achieving an impressive 625 mg/g within a 60 min reaction time compared to r-HAp. Our findings afford insights into the Pb removal mechanisms of HAp with different morphologies and can aid in the development of water purification strategies against heavy metal contamination.
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