XIA Zheng,LEI Lan,SHI Tie-ying,BAO Yun-yun,LIANG Ru-ping,QIU Jian-ding.Synthesis and Adsorption Properties of Hydroxyapatite-modified Biochar from Bamboo Shoot Shell[J].Journal of Instrumental Analysis,2025,44(01):126-134.
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 Ca²
+
and UO
2
2+
and the electrostatic interaction between biochar 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 adsorption 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.