Southern Cross GeoScience, Southern Cross University, Lismore, NSW, 2480, Australia.
Southern Cross GeoScience, Southern Cross University, Lismore, NSW, 2480, Australia.
Chemosphere. 2018 Apr;197:803-816. doi: 10.1016/j.chemosphere.2018.01.096.
Acid sulfate soils (ASS) contain substantial quantities of iron sulfide minerals or the oxidation reaction products of these sulfidic minerals. Transformation of iron (Fe) and sulfur (S) bearing minerals is an important process in ASS wetlands with fluctuating redox conditions. A range of potentially toxic metals and metalloids can either be adsorbed on or incorporated into the structure of Fe and S bearing minerals. Therefore, transformation of these minerals as affected by dynamic redox conditions may regulate the mobility and bioavailability of associated metals/metalloids. Better understanding of the interaction between Fe/S biogeochemistry and trace metal/metalloid mobility under fluctuating redox conditions is important for assessing contaminant risk to the environment. This review paper provides an overview of current knowledge regarding cycling of Fe, S and selected trace metal/metalloids in ASS wetlands under fluctuating redox conditions and outlines future research challenges and directions on this subject.
酸性硫酸盐土壤（ASS）中含有大量的铁硫化物矿物或这些硫化物矿物的氧化反应产物。在具有波动氧化还原条件的 ASS 湿地中，含铁（Fe）和含硫（S）矿物的转化是一个重要过程。一系列潜在的有毒金属和类金属可以被吸附或结合到 Fe 和 S 矿物的结构中。因此，受动态氧化还原条件影响的这些矿物的转化可能会调节相关金属/类金属的迁移性和生物可利用性。更好地了解波动氧化还原条件下 Fe/S 生物地球化学与痕量金属/类金属迁移性之间的相互作用，对于评估环境中污染物的风险非常重要。本文综述了在波动氧化还原条件下 ASS 湿地中 Fe、S 和选定的痕量金属/类金属循环的最新知识，并概述了该主题的未来研究挑战和方向。
