Levels of polycyclic aromatic hydrocarbons in different types of hospital waste incinerator ashes.
Levels of polycyclic aromatic hydrocarbons in different types of hospital waste incinerator ashes.
复制标题
不同类型医院垃圾焚烧炉灰烬中多环芳烃的含量。
DOI：
10.1016/j.scitotenv.2008.02.040
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发表时间：
2008-07-01
期刊：
影响因子：
--
通讯作者：
Wang H
中科院分区：
文献类型：
--
作者：
Zhao L;Zhang FS;Hao Z;Wang H
收集了在SARS（严重急性呼吸综合征）时期建成并在中国运行的三种医院垃圾焚烧炉的废灰，并对灰烬中的多环芳烃（PAH）特性进行了研究。废灰中∑多环芳烃的平均含量在4.16 ~ 198.92 mg kg - 1之间，致癌性多环芳烃的平均含量在0.74 ~ 96.77 mg kg - 1之间，超过了一些国家规定的限值。在三种焚烧炉中，两种中型焚烧炉产生的多环芳烃含量相对较高（平均∑PAH为22.50和198.92 mg kg - 1），而小型焚烧炉和大型焚烧炉的平均∑PAH为4.16和16.43 mg kg - 1)。底灰以低分子量多环芳烃（LM-PAH，含二至三环多环芳烃）和中分子量多环芳烃（MM-PAH，含四环多环芳烃）为主，而飞灰中含有丰富的MM-PAH和高分子量多环芳烃（HM-PAH，含五至六环多环芳烃）。统计分析表明，有机质与总多环芳烃呈显著正相关（R2 = 0.88），有潜力作为HW灰中多环芳烃的指标。此外，灰烬中的多环芳烃与某些金属元素呈正相关（如Fe、Ti、Mg）或负相关（Ca），表明这些元素可能促进或阻止HW燃烧过程中多环芳烃的形成。虽然HW焚烧炉产生的底灰尚未被列为有害物质，但本研究结果表明，这类废灰含有高浓度的多环芳烃，需要在填埋前进行特殊处理。
Waste ashes from three types of hospital waste (HW) incinerators, built in SARS (Severe Acute Respiratory Syndrome) period and currently running in China, were collected and polycyclic aromatic hydrocarbons (PAH) properties in the ashes were investigated. The mean ∑PAH levels in the waste ashes varied widely from 4.16 mg kg− 1 to 198.92 mg kg− 1, and the mean amounts of carcinogenic PAHs ranged from 0.74 to 96.77 mg kg− 1, exceeding the limits regulated by several countries. Among the three types of incinerators, two medium-scale incinerators generated relatively high levels of PAHs (mean ∑PAH 22.50 and 198.92 mg kg− 1) compared to small-scale and large-scale incinerators (mean ∑PAH 4.16 and 16.43 mg kg− 1). Bottom ashes were dominated by low molecular weight PAHs (LM-PAH; containing two- to three-ringed PAHs) and medium molecular weight PAHs (MM-PAH; containing four-ringed PAHs), while fly ashes were abundant in MM-PAH and high molecular weight PAHs (HM-PAH, containing five- to six-ringed PAHs). Statistical analysis indicated that there was a positive relationship (R2 = 0.88) between organic matter and total PAHs thus it has the potential to be used as an indicator for PAHs in HW ashes. Moreover, it was found that PAHs in the ashes correlated highly with some metallic elements either positively (e.g. Fe, Ti, Mg) or negatively (Ca), indicating that these elements might promote or prevent PAH formation during HW combustion. Although bottom ash resulted from HW incinerators has not been classified as hazardous material, the results of this study indicated that this type of waste ash contained high levels of PAHs thus need special treatment before landfill.
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影响因子：
11.4
作者：
Liu, KL;Xie, W;Riley, JT
通讯作者：
Riley, JT
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11.4
作者：
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通讯作者：
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作者：
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通讯作者：
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