焚化底渣重金屬總量分佈統計模式研究

Statistical Model of Total Metal Concentration in Bottom Ash

陳允恭(Yun-Gong Chen)

指導教授 ： 林正芳

國立臺灣大學/工學院/環境工程學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.01255

摘要

本研究主要之目的為探討焚化底渣重金屬總量分佈之統計模式，分析台北縣、台北市及桃園縣焚化底渣重金屬總量之差異，針對焚化底渣中重金屬總量及溶出試驗結果進行分析與統計模式應用之檢討。本研究依據環保署之申報資料進行目前營運中垃圾焚化廠底渣原始檢測及底渣資訊統計數據分析，並比較產業底渣再利用材質特性中總重金屬之佈，藉以建立焚化底渣中重金屬之分佈數據資料及統計模式，並實例探討底渣中重金屬總量與溶出重金屬之關聯性。
本研究結果顯示，焚化底渣中之重金屬以銅及鉛之含量較高，含銅總量約為889 ~ 3,136 mg/kg，含鉛總量約為384 ~ 1,518 mg/kg。分析結果顯示焚化底渣之含鉛總量與其溶出試驗結果於含鉛總量為875 ~ 1,125 mg/kg 及 1,125 ~ 1,375 mg/kg有顯著之正相關，而總鉛含量愈高時，其溶出試驗結果之分佈差異性亦愈小。而焚化底渣之含銅總量與其溶出試驗結果無顯著之相關性，惟總銅含量愈高時，其溶出試驗結果之分佈差異性愈小。
焚化底渣含銅及鉛之總量與其TCLP溶出量迴歸分佈，均呈現具臨界點之二次曲線分佈，由模式分析結果顯示焚化底渣總重金屬含量愈高，其溶出試驗結果亦有愈高之趨勢。目前各焚化廠底渣總重金屬含量及溶出試驗結果比對之實際統計數據較有不足，統計上較缺乏代表性。故針對各焚化廠之焚化底渣特性差異，後續宜進一步收集各批次之總重金屬含量及溶出試驗分析結果進行探討。若後續能以更充足之統計數據加以分析探討，依其不同特性建立更完整且具代表性的環境監測參數，亦可進一步將焚化底渣總重金屬含量臨界點應用於底渣再利用材質管理之分類與再利用之風險探討，以利再利用之管理與應用。

關鍵字

底渣 ； 總重金屬 ； 溶出試驗 ； 焚化底渣特性 ； 統計模式

並列摘要

The main objectives of this research were to profile distribution of heavy metals in bottom ash, to develop statistical models of heavy metal in bottom ash from Taipei county, Taipei city and Taoyuan county, then to correlate TCLP to total metal concentration. In terms of the data from EPA, the results of monitoring and statistics were analysed and compared with recycled bottom ash. Then the characteristics of distribution and statistical model were built and the correlation between total metal concentration and results of TCLP in bottom ash.
According to the results, Pb and Cu were the components with higher content in bottom ash. The total metal concentration of Cu was 889 ~ 3,136 mg/kg. The total metal concentration of Pb was 384 ~ 1,158 mg/kg. The result of statistical analysis showed that there was appreciably positive correlation between total metal concentration and TCLP of Pb in bottom ash. And the more total metal concentration of Pb, the less diverseness data of TCLP of Pb in bottom ash. However, there was not appreciably positive correlation between total metal concentration and TCLP of Cu in bottom ash. But the more total metal concentration of Pb, the less diverseness data of TCLP of Pb in bottom ash, too.
The results of regression of total metal concentration and TCLP of Cu and Pb in bottom ash appeared quadratic models of distribution with thresholds. It also showed that, the more total metal concentration in bottom ash, the more trends towards higher concentration of TCLP in bottom ash. The current data were so insufficient that the results of statistical analysis were short of representibility. So it is expediential to gather more data of batch of total metal concentration and TCLP in bottom ash in the light of diverseness of characteristics of bottom ash between different incinerators then to analyse them. The thresholds of total metal concentration in bottom ash will be applied for classification and risk assessment of recycled materals from bottom ash if there are more data for analysis and buildinding more complete and representative parameters. Thus, the management and application of recycled bottom ash will be expandable.

並列關鍵字

bottom ash ； total metal concentration ； TCLP ； characteristics of bottom ash ； statistical model

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