The influence of solid-phase organic carbon on the sorption of hydrophobic organic pollutants in landfill barriers, UK
The influence of solid-phase organic carbon on the sorption of hydrophobic organic pollutants in landfill barriers, UK
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DOI：
10.1007/s12665-021-09632-4
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发表时间：
2021-05
影响因子：
2.8
通讯作者：
Pinghua Huang;A. Stringfellow;D. Smallman;J. Marshall
中科院分区：
文献类型：
--
作者：
Pinghua Huang;A. Stringfellow;D. Smallman;J. Marshall
来自布莱奇利的牛津粘土、来自多塞特郡基默里奇湾的基默里奇粘土和来自英国怀特岛怀特克利夫的第三纪泥（威特灵地层）因其独特的有机材料特性（富含无定形有机物和/或富含植物碎屑）而被用作吸附剂样品。使用非酸萃取法（重液）萃取和涉及 HF 消解的传统方法分离有机物质以进行鉴定和分析。然后使用这些有机材料来确定萃取对疏水性有机污染物（甲苯和萘）吸附的影响。应用有机岩石学分类来识别各种类型的分离有机物质。与文献值相比，Kimmeridge 粘土中的无定形有机物表现出更高的吸附能力（吸附-解吸分配系数 (Kd)，Kd= 6,481, 59, 670；分别针对甲苯和萘）。富含无定形有机物的吸附剂提取物表现出比富含植物碎屑的吸附剂更高的吸收能力（例如，Wittering Formation，Kd= 219、10、134；分别针对甲苯和萘）。讨论了结果对垃圾填埋场设计/风险评估和建模的影响。
The Oxford Clay from Bletchley, the Kimmeridge Clay from Kimmeridge Bay, Dorset, and Tertiary mud (Wittering Formation) from Whitecliff, Isle of Wight, United Kingdom were used as sorbent samples because of their distinctive organic material characteristics (Amorphous organic matter rich and/or phytoclast rich). Organic material was isolated for identification and analysis using a non-acid extraction method (heavy liquid) extraction and traditional methods involving HF digestion. These organic materials were then used to determine influences of extraction on hydrophobic organic contaminants, (toluene and naphthalene) sorption. Organic petrology classification was applied to identify the various types of isolated organic material. Amorphous organic matter from the Kimmeridge Clay displayed a higher sorption capacity (Sorption–desorption distribution coefficient (Kd),Kd= 6,481, 59, 670; for toluene and naphthalene, respectively) compared to literature values. Amorphous organic matter-rich sorbent extracts demonstrated a higher absorption capacity than the phytoclast-rich sorbents (e.g., Wittering Formation,Kd= 219, 10, 134; for toluene and naphthalene, respectively). Implications of results in landfill design/risk assessment and modelling are discussed.