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enrichment process of lanthanum as a nonessential trace element in leaf cells of lettuce(Lactuca sativa L.)

Journal of Rare Earths 2022年第12期40卷 1969-1976,I0006页

作者： Mengzhu Cheng Xin Wang Yue Ben Shuya Zhang Lihong Wang Qing Zhou Xiaohua Huang National and Local Joint Engineering Research Center of Biomedical Functional Materials Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China Center for Plant Cell Biology Institute of Integrative Genome Biologyand Department of Botany and Plant SciencesUniversity of CaliforniaRiversideCA92521USA State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122China

Rare earth elements(REEs)as nonessential trace elements are enriched in living organisms and threaten their *** early detect and reduce REE enrichment in living organisms,scientists are focused on clarifying the enrichment process of REEs in living organisms and its ***,the enrichment process of REEs in edible plant cells has remained ***,by using interdisciplinary methods and techniques,the enrichment process of lanthanum(La(Ⅲ))in the leaf cells of lettuce(Lactuca sativa L.)was investigated.(1)When La(Ⅲ)exposure dose is 0.5-5μmol/L,La(Ⅲ)is enriched outside the plasma membrane(PM).In this zone,La(Ⅲ)is bound to vitronectin-like protein(VN)to form La-VN complexes;(2)When La(Ⅲ)exposure dose is 5-20μmol/L,besides the zone outside the PM,La(Ⅲ)is also enriched on the PM and bound to arabinogalactan proteins(AGPs)to form La-AGPs complexes;(3)When La(Ⅲ)exposure dose is 20-140μmol/L,besides the zone outside and on the PM,La(Ⅲ)is enriched inside the PM;(4)When La(Ⅲ)exposure dose is 60-140μmol/L,malondialdehyde content(an important indicator of invisible damage)significantly ***,as La(Ⅲ)exposure dose increases,La(Ⅲ)gradually migrates from outside the PM to the PM and inside the PM,enriching in these zones in *** enriched La(Ⅲ)will cause invisible damage to lettuce leaf cells and even enter human bodies along food *** results provide references for investigating the enrichment process of REEs in plants and its environmental risks,and finding strategies to early detect and reduce REE enrichment in plants.

关键词： Nonessential trace element Lanthanum exposure Lettuce leaf cell enrichment process Vitronectin-like protein Arabinogalactan proteins

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Recent progress of efficient utilization of titanium-bearing blast furnace slag

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International Journal of Minerals,Metallurgy and Materials 2022年第1期29卷 22-31页

作者： Yongfeng Cai Ningning Song Yunfei Yang Lingmin Sun Peng Hu Jinshu Wang Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufactureBeijing University of TechnologyBeijing 100124China

Titanium-bearing blast furnace slag(BFS)has valuable compositions and potential environmental ***,developing efficient and green approaches to utilize BFS is highly desired for resource economization and environmental *** the past decades,many attempts have been adopted to reuse BFS efficiently,and significant advances in understanding the fundamental features and the development of efficient approaches have been *** review provides a comprehensive overview of the latest progress on the efficient utilization of BFS and discusses the mechanism and characteristics of various approaches,along with their application *** particular,the extraction and enrichment of titanium-bearing phases from BFS are highlighted because of the high availability of titanium *** systemic and comprehensive review may benefit the design of new and green utilization routes with high efficiency and low cost.

关键词： titanium-bearing blast furnace slag utilization approach enrichment process extracting titanium mechanism

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enrichment of Platinum-group Elements(PGE) and Re-Os Isotopic Tracing for Porphyry Copper(Gold) Deposits

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Acta Geologica Sinica(English Edition) 2014年第4期88卷 1288-1309页

作者： HE Xiaohu ZHONG Hong ZHU Weiguang BAI Zhongjie HU Wenjun State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences University of Chinese Academy of Sciences

Platinum-group elements （PGE） in PGE-rich porphyry copper （gold） deposits are mainly Pt and Pd, whereas the concentrations of other PGE （Ru, Rh, Os, Ir） are significantly low. Moreover, Pt and Pd mainly exist in sulfides in the forms of crystal lattice or tiny platinum-group mineral （PGM） inclusions. The present data show that there is a positive relationship between Pt and Pd concentrations and Cu （Au） in porphyry copper （gold） deposits. The comparison of chondrite-normalized PGE distribution patterns between the ore-bearing porphyry intrusions and ore-barren porphyry intrusions in arc setting, 187^Os/188^Os, 87^Sr/86^Sr and S isotopes for porphyry copper （gold） deposits shows that PGEs were mainly derived from the mantle, and fluids from subduction zones devoted trivial PGE to the magma. The porphyry copper （gold） deposits associated with subducted events are most probably enriched in PGE, whereas those related to crustal thickening, lithospheric delamination or underplating rarely concentrate PGE. The osmium isotopic compositions in porphyry copper （gold） deposits reveal that （187^Os/188^Os）i values are highly variable and not lower than those of primitive upper mantle （PUM） and mantle peridotite, however, osmium concentrations are commonly lower than mantle peridotite, suggesting that parental magmas of some porphyry intrusions had experienced crustal contamination during magma evolution. Experimental investigations have proved that PGE exist in the forms of Cl^- and HS^- complexes during transportation and migration of the oreforming fluids. This paper summarizes previous studies including crucial controlling factors and mechanisms for PGE enrichment, and points out that the mantle-derived magmas parental to porphyry intrusions are the prerequisite for PGE enrichment in porphyry copper （gold） deposits. Favorable physical and chemical conditions （including salinity, temperature, pressure, pH, and oxygen fugacity） in hydrothermal fluids crucially control the PGE

关键词： PGE Re-Os isotope forms of migration enrichment process porphyry copper (gold)deposits.

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