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Material-and Site-Specific Partition Coefficients for Beneficial Use Assessments

机译：特定用途的物料和场所分配系数

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摘要

Partition coefficient (K-d) values available in the literature are often used in fate and transport modeling conducted as part of beneficial use risk assessments for industrial byproducts. Because element partitioning depends on soil properties as well as characteristics of the byproduct leachate, site-specific K-d values may lead to more accurate risk assessment. In this study, contamination risk to groundwater of beneficially reused byproducts was assessed using batch leaching tests on waste to energy bottom ash and coal combustion fly ash. Leachates were equilibrated with eight different soils to obtain the waste-soil-specific K-d,K-exp values for the metals of interest. The K-d,K-exp values were used as inputs in the Industrial Waste Management Evaluation Model to demonstrate the degree to which K-d estimates affect risk assessment outcomes. Measured K-d,K-exp values for the most part fell within the large range of K-d values reported in the literature, but IWEM results using default K-d values for some types of soils resulted in overestimated risk compared to those derived from K-d,K-exp values. Modeled concentration at the receptor location was much lower for some elements for those soils with high concentrations of iron and aluminum.
机译：文献中可用的分配系数（K-d）值通常用于命运和运输模型，作为工业副产品有益使用风险评估的一部分。由于元素分配取决于土壤性质以及副产物浸出液的特性，因此特定地点的K-d值可能导致更准确的风险评估。在这项研究中，通过对废料转化为能源底灰和燃煤粉煤灰的分批浸出试验，评估了有益再利用副产物对地下水的污染风险。用八种不同的土壤平衡渗滤液，以获得目标金属的废土比K-d，K-exp值。 K-d，K-exp值被用作工业废物管理评估模型中的输入，以证明K-d估计影响风险评估结果的程度。测得的Kd，K-exp值大部分落在文献中报道的Kd值的大范围内，但是与从Kd，K-exp得出的那些值相比，使用某些类型土壤的默认Kd值的IWEM结果导致高估了风险价值观。对于那些铁和铝含量高的土壤，某些元素在受体位置的模拟浓度要低得多。

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  • 来源
    《Environmental Science & Technology》 |2019年第16期|9626-9635|共10页
  • 作者

    Blaisi Nawaf I; Clavier Kyle A.; Roessler Justin G.; Chung Jaeshik; Townsend Timothy G.; Al-Abed Souhail R.; Bonzongo Jean-Claude J.;

  • 作者单位

    Imam Abdulrahman Bin Faisal Univ Coll Engn Dept Environm Engn POB 1982 Dammam Saudi Arabia;

    Univ Florida Dept Environm Engn Sci POB 116450 Gainesville FL 32611 USA;

    Univ Florida Dept Environm Engn Sci POB 116450 Gainesville FL 32611 USA|Korea Inst Sci & Technol Ctr Water Resource Cycle Seoul 136791 South Korea;

    US EPA Natl Risk Management Res Lab 26 West Martin Luther King Dr Cincinnati OH 45268 USA;

  • 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);
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  • 正文语种 eng
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