羟基磷灰石改性竹笋壳生物炭的合成及吸附性能研究  

Synthesis and Adsorption Properties of Hydroxyapatite-modified Biochar from Bamboo Shoot Shell

作　　者：夏蒸 雷兰 石铁应 鲍云云 梁汝萍[2] 邱建丁 XIA Zheng;LEI Lan;SHI Tie-ying;BAO Yun-yun;LIANG Ru-ping;QIU Jian-ding(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]南昌大学化学化工学院,江西南昌330031

出　　处：《分析测试学报》2025年第1期126-134,共9页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目(22376023,22176082,22036003);江西省重点研发计划项目(20232BBE50031)。

摘　　要：该研究以竹笋壳为原料合成了具有多孔结构和亲水性磷酸基团的羟基磷灰石改性竹笋壳生物炭(BSHAP),用于高效吸附废水中的铀酰离子(UO_(2)^(2+))。BS-HAP的多孔结构可有效增加与UO_(2)^(2+)的接触面积,促进对UO_(2)^(2+)的吸附;BS-HAP中的磷酸基团可为化学吸附UO_(2)^(2+)提供结合位点,使得BS-HAP对UO_(2)^(2+)具有优异的吸附性能。同时,Ca^(2+)与UO_(2)^(2+)之间的离子交换作用以及生物炭与UO_(2)^(2+)之间的静电相互作用,协同促进了BSHAP对UO_(2)^(2+)的吸附。在酸性条件下,BS-HAP对UO_(2)^(2+)的吸附容量为815.2 mg·g^(-1)。BS-HAP不仅对UO_(2)^(2+)具有强的吸附能力,还具有良好的选择性和稳定性,即使经多次循环使用,仍能保持对UO_(2)^(2+)的高效去除能力。BS-HAP为含铀废水处理提供了有效方法,对推动绿色可持续的废水处理技术发展具有重要意义。Hydroxyapatite modified bamboo shoot shell biochar(BS-HAP)with porous structure and hydrophilic phosphate group was synthesized from bamboo shoot shell to adsorb uranyl ions(UO_(2)^(2+))in wastewater.The porous structure of BS-HAP can effectively increase the contact area with UO_(2)^(2+)and promote the adsorption process of UO_(2)^(2+).The phosphate groups in BS-HAP can provide binding sites for the chemisorption of UO_(2)^(2+),which makes BS-HAP excellent adsorption properties for UO_(2)^(2+).At the same time,the ion exchange between Ca^(2+)and UO_(2)^(2+)and the electrostatic interaction between bio⁃char and UO_(2)^(2+)synergistically promote the adsorption of UO_(2)^(2+)by BS-HAP.Under acidic conditions,the adsorption capacity of BS-HAP for UO_(2)^(2+)is 815.2 mg·g^(-1).BS-HAP not only has strong adsorp⁃tion capacity for UO_(2)^(2+),but also has good selectivity and stability.Even under multiple recycling and actual wastewater treatment conditions,BS-HAP can still maintain the efficient removal capacity for UO_(2)^(2+).BS-HAP provides an effective method for the treatment of uranium containing wastewater,which is of great significance for promoting the development of green and sustainable wastewater treatment technology.

关 键 词：竹笋壳 生物炭 羟基磷灰石 铀酰离子 吸附 

分 类 号：O657.3[理学—分析化学] TL211.7[理学—化学]