煤炭和基于煤炭的固体废物中的亚利法和多环芳香化合物:与煤炭形成的古老环境的关系以及对环境污染的影响
Zijiao Yuan1, Shenghui Shi1, Xiaoguo Wu1
1Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, PR China; Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu, Anhui 241002, PR China.
这项研究分析了中国煤炭和固体废物的多环芳香化合物 (PAC) 和n-基. 焦油残留物显示了最高的PACs,而原煤及其废物度较低,影响了环境风险评估.
科学领域:
- 环境化学环境化学
- 有机地化学 有机地化学
- 煤炭科学 煤炭科学
背景情况:
- 煤炭及其固体废物是多环芳香化合物 (PAC) 和碳化合物的重要来源.
- 了解这些化合物的分布和特性对于环境风险评估至关重要.
- 中国的梁海矿区 (LH) 是研究煤炭污染物的独特案例.
研究的目的:
- 分析 76 种多环芳香化合物 (PAC), 27 种n-和 2 种异oprenoids 在 Lianghuai 矿区原煤和煤基固体废物中的度和成分.
- 研究沉积古环境和人为过程 (燃烧,气候变化) 对这些有机污染物的特性的影响.
- 评估不同煤炭相关材料中PAC的毒性,并评估传统诊断比率对来源分配的可靠性.
主要方法:
- 采集煤炭,煤炭,飞灰,底灰,脱硫石膏和焦油残留样本,这些样本来自Lianghuai矿区.
- 使用气相色谱-质谱法 (GC-MS) 进行化学分析,以量化76种PAC,27种n-和2种异oprenoid.
- 诊断比率的计算和PAC的毒性评估.
主要成果:
- 原煤比大多数固体废物度更高的n-alkane和76PACs度,焦油残留物显示最高值.
- 古代环境主要是湖和淡水,具有氧化条件和混合的有机投入,在华南和华北煤矿区之间有所不同.
- 煤炭燃烧和带气候变化导致n-基和PAC的损失,增加了母PAC,并有利于较短的n-基,尽管带气候变化没有改变n-基组成.
- 毒性排名从高到低:焦油残留物,原煤,煤炭和燃煤产品.
- 传统的诊断比率对于原煤和煤源的识别可能不可靠,但可以帮助识别源附近的燃烧源.
结论:
- 在不同与煤相关的材料中,PAC和n-的组成和度存在很大差异.
- 燃烧和气候变化等环境过程改变了这些有机化合物的原始特性.
- 需要仔细考虑诊断比率,以准确分配来源,特定比率可能表明直接煤炭污染.
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