Fractionation and fixation of rare earth elements in soils:Effect of spiking with lanthanum,cerium,and neodymium chlorides

作     者：Olga B.Rogova Petr S.Fedotov Rustam Kh.Dzhenloda Vasily K.Karandashev Olga B.Rogova;Petr S.Fedotov;Rustam Kh.Dzhenloda;Vasily K.Karandashev

作者机构：V.V.Dokuchaev Soil Science InstituteRussian Academy of Sciences7 Building 2 Pyzhevskiy Side StreetMoscow119017Russia V.I.Vernadsky Institute of Geochemistry and Analytical ChemistryRussian Academy of Sciences19 Kosygin StreetMoscow119991 Russia National University of Science and Technology'MISiS'4 Leninsky ProspectMoscow119049Russia The Institute of Microelectronics Technology and High-Purity MaterialsRussian Academy of Sciences6 Institution StreetChernogolovka142432Russia 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2022年第40卷第1期

页      面：143-152页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 120405[管理学-土地资源管理] 

基　　金：Project supported by the Russian Science Foundation(16-13-10417) the Russian Foundation for Basic Research(19-05-50016) Ministry of Science and Higher Education of the Russian Federation(K1-2014-026,K2-2020-003) Vernadsky Institute of Geochemistry and Analytical Chemistry,Russian Academy of Sciences(0116-2019-0010) 

主　　题：Rare earth elements Soddy-podzolic soil Chernozem Fractionation Competitive binding 

摘      要：Industrial and agricultural activities lead to the release of rare earth elements(REEs)in wastewater and aquatic ecosystems,and their accumulation in ***,the behavior of REEs in soils remains somewhat *** the present work the fractionation and fixation of REEs in soddy-podzolic and chernozem soils spiked with La,Ce,and Nd chlorides were studied using dynamic(continuous flow)extraction,which allows natural conditions to be mimicked and artefacts to be *** eluents applied are aimed to dissolve exchangeable,specifically sorbed,bound to Mn oxides,bound to metal-organic complexes,and bound to amorphous and poorly ordered Fe/Al oxides fractions extractable by 0.05 mol/L Ca(NO_(3))2,0.43 mol/L CH_(3)COOH,0.1 mol/L NH_(2)OH·HCl,0.1 mol/L K_(4)P_(2)O_(7) at pH 11,and 0.1 mol/L(NH4)_(2)C_(2)O_(4) at pH 3.2,*** is found that the fixations of added La,Ce,and Nd in the form of metal-organic complexes is predominant for both types of soils:35%-38%in soddy-podzolic soil and 50%-79%in *** fixation of added elements in the first three fractions(exchangeable,specifically sorbed,and bound to Mn oxides)is significant for soddy-podzolic soil(5%-25%).For chernozem,the relative contents of added Ce and Nd in these fractions are nearly *** the content of exchangeable La is notable,about 5%.Adding any of three elements(La,Ce,or Nd)at the level of100 mg/kg to an initial sample results in changing the fractionation and bioaccessibility of other REEs present in *** contents increase in the first three fractions and decrease in fifth(oxalate extractable)fraction for both soddy-podzolic soil and *** main difference is the behavior of REEs in pyrophosphate extractable *** soddy-podzolic soil,adding La,Ce,or Nd results in decreasing the contents of other REEs associated with organic *** chernozem,on the contrary,the contents of REEs in the form of metal-organic complexes slightly *** processes