Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, 7610001 Israel.
Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, 7610001 Israel.
Chemosphere. 2020 Jun;249:126099. doi: 10.1016/j.chemosphere.2020.126099. Epub 2020 Feb 4.
Indium and gallium are used widely in modern industry, mostly for the production of semiconductors. They are considered as Technology-Critical Elements and have therefore received growing attention in the past few years. We investigated the influence of different types of humic substances on the transport of indium and gallium in laboratory-scale, saturated column experiments, to gain understanding of their mobility in natural environments. We evaluated the effect of different humic substances on the transport of indium and gallium in quartz sand: a commercial humic acid (Aldrich Humic Acid, AHA), a fulvic acid (Suwannee River Fulvic Acid, SRFA) and an aquatic natural organic matter (Suwannee River Natural Organic Matter, SRNOM). The impact of the flow rate and the influence of different concentrations of organic matter were also investigated. Indium was shown to be more mobile than gallium in the presence of humic substances. The mobility of indium in sand was highest for SRNOM, followed by SRFA and then AHA, while for gallium the order was SRFA > SRNOM > AHA. These results can be significant in understanding the mobility of indium and gallium in soils with various compositions of organic matter.
铟和镓在现代工业中被广泛应用，主要用于半导体的生产。它们被认为是关键技术元素，因此在过去几年中受到了越来越多的关注。我们研究了不同类型腐殖质物质对实验室规模、饱和柱实验中铟和镓迁移的影响，以了解它们在自然环境中的迁移性。我们评估了不同腐殖质物质对石英砂中铟和镓迁移的影响：一种商业腐殖酸（Aldrich 腐殖酸，AHA）、一种黄腐酸（苏万尼河黄腐酸，SRFA）和一种水生天然有机物（苏万尼河天然有机物，SRNOM）。还研究了流速的影响以及不同浓度有机物的影响。在腐殖质物质存在的情况下，铟比镓更具迁移性。在沙子中，铟的迁移性以 SRNOM 最高，其次是 SRFA，然后是 AHA，而对于镓，顺序是 SRFA > SRNOM > AHA。这些结果对于理解不同有机物组成的土壤中铟和镓的迁移性具有重要意义。
