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首页> 外文会议>Annual North American Waste to Energy Conference >Environmental Characterization of Ash from the Combustion of Wood and Tires for Beneficial Use in Florida
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Environmental Characterization of Ash from the Combustion of Wood and Tires for Beneficial Use in Florida

机译：从木材和轮胎燃烧中的灰烬环境表征在佛罗里达州的有益用途

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Florida, along with many states, has developed policies for determining when a non-hazardous industrial solid waste such as combustion ash can be land applied in a beneficial manner. As part of research investigating the use of leaching tests for risk-based decision making in solid waste management, ash from a facility that combusts wood debris and tires for fuel was characterized. From a direct human exposure pathway, arsenic was found to be the most limiting metal. This is likely to be the case with many combustion ashes, as Florida has relatively low risk based clean soil levels for arsenic. Even ash from the combustion of clean wood will have arsenic concentrations greater than the SCTL for arsenic. Iron and copper also exceeded their respective SCTLs for residential application, but not for industrial application. It is noted that unlike arsenic (which is a carcinogen), copper and iron are listed only based on toxicity. With respect to leaching, two different approaches were compared: comparing total concentrations (mg/kg) to the leaching SCTLs and comparing actual leachate concentrations (mg/L) to GWCTLs. Comparison with the leaching SCTLs indicated that arsenic, chromium and zinc would pose a potential risk to ground water. The SPLP results did not find these metals to pose a risk, but found lead instead. This suggests that using leaching SCTLs that are developed for soil is not appropriate for application to combustion ash. The SPLP results showed elevated levels of lead (above the GWCTL). When compared to steady state concentrations measured in the 1ft lysimeters, SPLP lead concentrations matched very well. This suggests that SPLP concentrations were reflective of the pore water concentration for this ash and that a dilution factor should be applied if one is appropriate for the particular land application scenario. The authors note, however, that SPLP concentrations for other wastes and metals may not always be representative of pore water concentrations.
机译：佛罗里达州以及许多国家开发了确定何时燃烧灰等非危险工业固体废物的政策，以燃烧灰烬可以是有益的方式施加的土地。作为研究在固体废物管理中使用浸出试验的研究的一部分，其特征在于燃烧木屑和燃料轮胎的设施的灰烬。从直接人的暴露途径，发现砷是最限制的金属。这可能是许多燃烧灰烬的情况，因为佛罗里达州的风险相对较低，砷的清洁土壤水平相对较低。甚至来自清洁木材燃烧的灰烬将具有比砷的SCTL大的砷浓度。铁和铜还超过了他们各自的SCTL，用于住宅申请，但不是工业应用。注意，与砷（是致癌物）不同，铜和铁仅基于毒性而列出。关于浸出，比较了两种不同的方法：将总浓度（Mg / kg）与浸出的SctL进行比较并将实际渗滤液浓度（Mg / L）与Gwcts进行比较。与浸出SCTL的比较表明砷，铬和锌会对地下水构成潜在风险。 SPLP结果没有找到这些金属来构成风险，但发现铅。这表明使用为土壤开发的浸出SCTL不适用于燃烧灰烬。 SPLP结果显示出升高的铅（高于GWCT1）。与在1FT稳定度计中测量的稳态浓度相比，SPLP铅浓度非常良好。这表明SPLP浓度反射该灰分的孔隙水浓度，并且如果适合特定的土地应用场景，应施加稀释因子。然而，作者注意到，其他废物和金属的SPLP浓度可能并不总是代表孔水浓度。

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