期刊论文

Preparation of porcine bone based hydroxyapatite and its adsorption to uranium

中文

工业水处理

1005-829X

2020

40

8

69-74

10.11894/iwt.2019-0810

国家自然科学基金资助项目(51174117) 湖南省重点学科资助项目(土木工程0212-002300001)。

本校为第一机构

以猪骨为原料制备羟基磷灰石(HAP),考察了其对重金属离子铀(Ⅵ)的吸附性能,探讨体系pH、含铀废水初始浓度、羟基磷灰石用量、吸附时间、体系温度对吸附性能的影响,并研究其作用机理。结果表明,吸附剂主要组成为羟基磷灰石Ca_(10)(PO_4)_6(OH)_2,其晶体结构由短棒状结构转变为层片状结构。温度为25 ℃、pH为4时,羟基磷灰石吸附溶液中的铀在80 min内达到平衡,最大吸附量达到483.10 mg/g。吸附量随着体系温度的升高逐渐增大,升温有利于吸附;伪二级动力学方程能更好地拟合吸附过程,吸附行为更符合Langmuir模型。表征与吸附试验表明,吸附机理为铀(Ⅵ)与HAP活性基团的表面络合反应及离子交换反应。

The hydroxyapatite(HAP) was prepared from pig bone as raw material,and its adsorption performance for heavy metal ion uranium(Ⅵ) was investigated. The impact of the system of pH,initial concentration of uranium wastewater, the dosage of hydroxyapatite,adsorption time,system temperature on adsorption properties of HAP to uranium (Ⅵ) were discussed. The results showed that the adsorbent was mainly composed of hydroxyapatite Ca_(10)(PO_4)_6(OH)_2, and its crystal structure changed from short rod structure to lamellar structure. When the temperat...