Antimony toxicity upon microorganisms from aerobic and anaerobic environments

Ivan Moreno-Andrade; Reyes Sierra-Alvarez; Marisol Perez-RangelCinthya BarreraJim A. FieldAurora Pat-Espadas

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Antimony toxicity upon microorganisms from aerobic and anaerobic environments

机译：Antimony toxicity upon microorganisms from aerobic and anaerobic environments

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Antimony (Sb) is a toxic and carcinogenic metalloid that can be present in contaminated water generated by mining operations and other industrial activities. The toxicity of Sb (Ⅲ) and Sb (Ⅴ) to aerobic microorganisms remains limited and unexplored for anaerobic microorganisms involved in hydrogen (H_2) and methane (CH_4) production. This study aimed to evaluate the toxicity of Sb (Ⅲ) and Sb (Ⅴ) upon aerobic and anaerobic microorganisms important in biological wastewater treatment systems. Sb (Ⅲ) was more toxic than Sb (Ⅴ) independently of the test and environment evaluated. Under aerobic conditions maintained in the Microtox assay, Sb (Ⅴ) was not toxic to Allivibrio fischeri at concentrations as high as 500 mg/L, whereas Sb (Ⅲ) caused just over 50 inhibition at concentration of 250 mg/L after 5 min of exposure. In the respirometry test, for the specific oxygen uptake rate, the concentrations of Sb (Ⅲ) and Sb (Ⅴ) displaying 50 inhibition were 0.09 and 56.2 mg/L, respectively. Under anaerobic conditions, exposure to Sb (Ⅲ) and Sb (Ⅴ) led to a decrease in microorganisms activity of fermentative and methanogenic processes. The results confirm that the microbial toxicity of Sb depends on its speciation and Sb (Ⅲ) displays a significantly higher inhibitory potential than Sb (Ⅴ) in both aerobic and anaerobic environments.

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《Journal of environmental science and health, Part A. Toxic/hazardous substances & environmental engineering》 |2023年第2期|61-68|共8页
作者
Ivan Moreno-Andrade; Reyes Sierra-Alvarez; Marisol Perez-RangelCinthya BarreraJim A. FieldAurora Pat-Espadas;
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作者单位

Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, Laboratory for Research on Advanced Processes for Water Treatment,Unidad Academica Juriquilla, Queretaro, Mexico;

Department of Chemical and Environmental Engineering, University of Arizona, Tucson,Arizona, USA;

Institute of Geology, Estacion Regional del Noroeste, Universidad Nacional Autonoma de Mexico, Luis Donaldo Colosio s/n,Hermosillo, Sonora, Mexico;

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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
正文语种英语
中图分类
关键词
anaerobic digestion; antimony toxicity; fermentative inhibition; methanogenic toxicity; specific oxygen uptake rate;

Antimony toxicity upon microorganisms from aerobic and anaerobic environments

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