Evaluation of Techniques for Estimating Metal Leachability from Solid Wastes Blended with Granular Materials,ACS ES&T Engineering

当前位置： X-MOL 学术 › ACS ES&T Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Evaluation of Techniques for Estimating Metal Leachability from Solid Wastes Blended with Granular Materials
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2020-10-22 , DOI: 10.1021/acsestengg.0c00098
Michael Hofmeister ₁ , Kyle A. Clavier ₁ , Jean-Claude J. Bonzongo ₁ , Timothy G. Townsend ₁

Affiliation

Combining solid wastes with granular materials is commonly performed for various recycling applications. Traditional methods for assessing risk from land-applied waste materials involve a batch-leaching test on a waste by itself. This may not be an accurate means of estimating leaching risk from a waste material once blended with native soil or other granular material. Four different methods of estimating leaching risk from scrubber product and wood–tire ash blended with granular materials were assessed. Data indicate that leaching from the waste material alone is an excessively conservative estimate when compared to leaching on the blends themselves. Measured leaching from the blended materials followed a linear relationship with waste blend percentage and may be useful for interpolating concentrations. Mathematically reducing leachate concentrations proportionate to the mass of waste in the blend yielded the least conservative estimates, even when accounting for blend pH. Arsenic leaching from the scrubber product blends was often twice as high as mass-based dilution estimates. Elements such as As, V, Zn, and Pb leached higher in actual blends than would be expected based on 1:1 mass dilutions. This study provides risk assessment insights into the efficacy of different leaching risk estimation methods for blended waste materials.

中文翻译：

颗粒状混合固废中金属浸出能力估算技术的评价

通常将固体废物与粒状材料结合起来用于各种回收应用。传统的评估来自陆地废弃物的风险的方法包括对废弃物进行分批浸出测试。一旦与天然土壤或其他粒状材料混合，这可能不是估算废物中浸出风险的准确方法。评估了四种不同的方法来评估洗涤产品和木灰与颗粒状物料混合的浸出风险。数据表明，与掺混物本身的浸出相比，仅从废物中浸出是过于保守的估计。从混合材料中测得的浸出量与废物混合百分比呈线性关系，可用于内插浓度。以数学方式降低渗滤液的浓度与混合物中废物的质量成正比，即使考虑混合物的pH值，也得出的保守估计最少。从洗涤塔产品混合物中浸出的砷通常是基于质量的稀释估算值的两倍。在实际的混合物中，诸如As，V，Zn和Pb等元素的浸出要高于基于1：1质量稀释的预期。这项研究为混合废物的不同浸出风险评估方法的有效性提供了风险评估见解。实际掺混物中的铅和铅的浸出量要高于基于1：1质量稀释时的浸出量。这项研究为混合废物的不同浸出风险评估方法的有效性提供了风险评估见解。实际掺混物中的铅和铅的浸出量要高于基于1：1质量稀释时的浸出量。这项研究为混合废物的不同浸出风险评估方法的有效性提供了风险评估见解。

更新日期：2020-10-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文