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TiO2 nanoparticles in sediments: Effect on the bioavailability of heavy metals in the freshwater bivalve Corbicula fluminea

机译:沉积物中的TiO2纳米颗粒:对淡水双壳贝类中的重金属生物利用度的影响

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摘要

Most studies investigating the influence of TiO2 NPs on heavy metal bioavailability have focused on the aqueous phase; however, few have examined the sediments containing more nanoparticles. Here, we investigated the effects of TiO2 NPs on heavy metal bioavailability in C. fluminea in sediments. The interactions between the TiO2 NPs and metals in sediments, the influence of TiO2 NPs on metals levels in aqueous phase and geochemical speciation were also explored. The results indicated the large adsorption capacity of TiO2 NPs and the strong adsorption affinity to metals caused the metals adsorbed on nanoparticles, which decreased the metals concentrations in water phase. Changes in metal speciation caused by metals in EXC, CAR, and IMO partly transported from sediments to TiO2 NPs during the aging of sediments. Heavy metals contents in C. fluminea tissues were in the order of gill > visceral mass > mantle > foot and increased with the increasing TiO2 NPs contents in sediments. TiO2 NPs enhanced the bioavailability of metals in the speciation of EXC, CAR, and IMO in sediments by the Trojan horse effects. The results can facilitate a more realistic evaluation of the environmental risks of TiO2 NPs to benthic organisms in heavy metal-contaminated sediments. (C) 2017 Published by Elsevier B.V.
机译:大多数研究TiO2 NPs对重金属生物利用度影响的研究都集中在水相上。然而,很少有人检查含有更多纳米颗粒的沉积物。在这里,我们研究了TiO2 NPs对沉积物中氟纳曼梭菌重金属生物利用度的影响。还研究了TiO2 NPs与沉积物中金属的相互作用,TiO2 NPs对水相中金属含量的影响以及地球化学形态。结果表明,TiO2 NPs吸附能力强,对金属的强吸附力导致金属吸附在纳米颗粒上,降低了水相中金属的含量。由EXC,CAR和IMO中的金属引起的金属形态变化在沉积物老化期间部分地从沉积物迁移至TiO2 NPs。梭状芽胞杆菌组织中的重金属含量依次为g>内脏质量>地幔>脚,并随着沉积物中TiO2 NPs含量的增加而增加。 TiO2 NPs通过特洛伊木马效应增强了沉积物中EXC,CAR和IMO物种中金属的生物利用度。结果可以促进对被重金属污染的沉积物中的TiO2 NPs对底栖生物的环境风险进行更现实的评估。 (C)2017由Elsevier B.V.发布

著录项

  • 来源
    《Journal of Hazardous Materials》 |2018年第15期|41-50|共10页
  • 作者单位

    Hohai Univ, Key Lab Integrated Regulat & Resources Dev Shallo, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Environm, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Key Lab Integrated Regulat & Resources Dev Shallo, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Environm, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Key Lab Integrated Regulat & Resources Dev Shallo, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Environm, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Key Lab Integrated Regulat & Resources Dev Shallo, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Environm, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Key Lab Integrated Regulat & Resources Dev Shallo, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Environm, Nanjing 210098, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    TiO2 nanoparticle; Heavy metal bioavailability; Geochemical speciation; Sediment; Corbicula fluminea;

    机译:TiO2纳米颗粒;重金属生物利用度;地球化学形态;沉积物;弯刀菌;
  • 入库时间 2022-08-17 13:21:49

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