Dynamics of crystallization and dissolution of calcium orthophosphates at the near-molecular level  

作　　者：WANG LIJun LU JianWei XU FangSen ZHANG FuSuo 

机构地区：[1]College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China [2]College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China

出　　处：《Chinese Science Bulletin》2011年第8期713-721,共9页

基　　金：supported by the National Natural Science Foundation of China (41071208);a start-up grant from the Huazhong Agricultural University (52204-09008)

摘　　要：Although extensive investigations of biogenic and geological calcium phosphate crystallization/dissolution and their phase transformations have been performed,the mechanisms of crystallization and dissolution of sparingly soluble calcium phosphates in geological settings have not been completely determined at the near-molecular level.In particular,an understanding of the physical-chemical processes at the earliest nucleation stage and the subsequent crystal surface dynamics in soil solutions is lacking.This review focuses on the earliest events in homo/heterogeneous nucleation from an initial supersaturated solution phase,the subsequent growth of calcium phosphate phases,and the relevant influences of the presence of additional inorganic and organic molecules in both geological and biological settings.These studies have implications for the understanding of the complex processes of calcium phosphate transformations in soils,and provide possible physical-chemical mechanisms for the biogeochemical behavior of phosphorus at the near-molecular level.Although extensive investigations of biogenic and geological calcium phosphate crystallization/dissolution and their phase transformations have been performed, the mechanisms of crystallization and dissolution of sparingly soluble calcium phosphates in geological settings have not been completely determined at the near-molecular level. In particular, an understanding of the physical-chemical processes at the earliest nucleation stage and the subsequent crystal surface dynamics in soil solutions is lacking. This review focuses on the earliest events in homo/heterogeneous nucleation from an initial supersaturated solution phase the subsequent growth of calcium phosphate phases, and the relevant influences of the presence of additional inorganic and organic molecules in both geological and biological settings. These studies have implications for the understanding of the complex processes of calcium phosphate transformations in soils, and provide possible physical-chemical mechanisms for the biogeochemical behavior of phosphorus at the near-molecular level.

关 键 词：钙磷酸盐 分子水平 溶解 结晶 物理化学过程 生物环境 地球化学行为 土壤溶液 

分 类 号：TQ174.758[化学工程—陶瓷工业] Q7[化学工程—硅酸盐工业]