Development of novel molecular-scale methods for the study of oxyanion environmental chemistry

开发用于研究氧阴离子环境化学的新型分子尺度方法

• 批准号: 261432-2008
• 负责人: Peak, Derek
• 金额: $ 1.68万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=479824
• 关键词: Development; novel; molecular; scale; methods

Many different oxyanions are found in the soil environment, and the chemistry of these oxyanions is quite varied. Some oxyanions such as phosphate and sulfate are essential nutrients for plant growth and are found in relatively high concentrations in soils. Other oxyanions such as borate are essential for plant growth at low concentrations but become toxic at higher concentrations. A third group of oxyanions, such as arsenate, arsenite, selenate, selenite, and chromate are frequently studied because they have little agronomic use and are instead detrimental to human health at even very low concentrations.

土壤环境中存在许多不同的氧阴离子，这些氧阴离子的化学性质也各不相同。一些氧阴离子，如磷酸盐和硫酸盐，是植物生长必需的营养物质，在土壤中的浓度相对较高。其他含氧阴离子（例如硼酸根）在低浓度下对于植物生长至关重要，但在高浓度下会变得有毒。第三组含氧阴离子，例如砷酸盐、亚砷酸盐、硒酸盐、亚硒酸盐和铬酸盐，经常被研究，因为它们几乎没有农艺用途，而且即使在非常低的浓度下也会对人类健康有害。