您好，欢迎访问中国热带农业科学院 机构知识库！
中国热带农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Generic phosphate affinity constants of the CD-MUSIC-eSGC model to predict phosphate adsorption and dominant speciation on iron (hydr)oxides

文献类型： 外文期刊

作者： Jin, Jiezi 1 ; Xiong, Juan 1 ; Liang, Yu 2 ; Wang, Mingxia 1 ; Huang, Chuanqin 1 ; Koopal, Luuk 3 ; Tan, Wenfeng 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Resources & Environm, State Environm Protect Key Lab Soil Hlth & Green R, Wuhan 430070, Peoples R China

2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Peoples R China

3.Wageningen Univ & Res, Phys Chem & Soft Matter, POB 8038, NL-6708 WE Wageningen, Netherlands

关键词： Iron (hydr)oxides; Phosphate; Surface complexation model; CD-MUSIC; Generic model parameters; Database

期刊名称：WATER RESEARCH （ 影响因子：11.4； 五年影响因子：12.2 ）

ISSN： 0043-1354

年卷期： 2024 年 264 卷

页码：

收录情况： SCI

摘要： Estimating the availability of phosphorus in soils and sediments is complicated by the diverse mineralogical properties of iron (hydr)oxides that control the environmental fate of phosphorus. Despite various surface complexation models have been developed, lack of generic phosphate affinity constants (logKPO4s) for iron (hydr) oxides hinders the prediction of phosphate adsorption to iron (hydr)oxides in nature. The aim of this work is to derive generic logKPO4s for the Charge Distribution-Multisite Complexation extended-Stern-Gouy-Chapman (CDMUSIC-eSGC) model using a large phosphate adsorption database and previously derived generic protonation parameters. The optimized logKPO4s of goethite, hematite and ferrihydrite are located in a much narrower range than those in the RES3T database. Specifically, the logKPO4 ranges of ---FeOPO3, ---FeOPO2OH, ---FeOPO(OH)2, ---(FeO)2PO2, and ---(FeO)2POOH complexes were 17.40-18.00, 24.20-27.40, 27.90-29.80, 26.50-29.60, and 30.70-33.40, respectively. A simplified CD-MUSIC-eSGC model with species ---FeOPO2OH and ---(FeO)2PO2 and generic logKPO4 values 26.0 +/- 0.9 and 27.9 +/- 0.8, respectively, provides an accurate prediction of phosphate adsorption and dominant speciation to the iron (hydr)oxides at environmental pH and phosphate levels. For ferrihydrite at low pH and high phosphate levels the species ---FeOPO(OH)2 and ---(FeO)2POOH cannot be neglected. The simplified model expands the application boundaries of CD-MUSIC-eSGC model in predicting the phosphate adsorption on natural iron (hydr)oxides without laborious characterization.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国热带农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台