锌稳定同位素分析方法及其在环境科学研究中的应用

Measurement and application of zinc stable isotope in environmental science

锌的广泛使用使得大量锌通过冶金、农业、能源使用等途径进入到环境中,随着多接收电感耦合等离子体质谱(MC-ICP-MS)的出现,锌同位素在环境污染源示踪方面逐渐得到应用。本文对近年来锌同位素的研究成果及锌同位素体系进行了总结,分别从纯化分离与浓缩富集、仪器质量歧视校正、锌同位素的组成与分馏机理以及锌同位素在土壤、沉积物、水体、大气和植物污染源示踪中的应用等方面进行了论述。锌元素是生物体所需的必要元素,生物吸收、矿物吸附、蒸发冷凝等作用都会导致其分馏,深入开展锌同位素分馏机理研究、完善锌同位素在各物质储库中的分布,将有助于推动锌同位素在环境科学领域的广泛应用。

Zinc is widely used in metallurgy, agriculture and energy, which make lots of zinc en- ter into the environment. The emergence of multi-collector inductively coupled plasma mass spec- trometry has gradually allowed for the application of zinc isotope in tracing the sources of pollu- tion. Referring to the previous studies of zinc isotopes, this paper discusses the progress in as- pects of the purification and enrichment method, the instrument mass fractionation correction method, composition of zinc isotope in natural substances and isotopic fractionation mechanism. The applications of zinc isotope as a probe in contaminated soil, sediment, water, and atmos- phere are also discussed. Zinc is necessary to life. The isotopic fractionation of zinc isotope can occur during the process of biological absorption, mineral adsorption, evaporation, condensation, and so on. More information about the variation of zinc isotope composition in different reservoirs is needed and the related mechanism of isotopic fractionation should be further studied, which can contribute to the widespread use of zinc isotope in the field of environmental science.