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131.
为分析典型焦化污染场地不同粒径土壤中PAHs的累积及其与土壤有机碳含量(TOC)、比表面积(SA)等土壤性质的相关性,对北京焦化厂长期受PAHs污染的土壤进行粒度分级[P1(0.5~1.0 mm)、P2(0.25~0.5 mm)、P3(0.15~0.25 mm)、P4(0.106~0.15 mm)、P5(0.075~0.106 mm)、P6(<0.075 mm)],测定了各粒径土壤的理化性质及土壤中USEPA优先控制的16种PAHs的浓度,探究PAHs在不同粒径土壤中的累积特征,并通过PAHs质量分数及土壤部分理化性质的曲线拟合结果分析PAHs的赋存特征。结果表明:各粒径土壤中16种PAHs均有检出,其最高质量分数大多出现在P1粒径土样,最低质量分数出现在 P4、P5中。各粒径土壤中2~3(低)环 PAHs、ΣPAHs16质量分数变化趋势相似,均为 P1>P2>P3、P4、P6>P5(P<0.05),4(中)、5~6(高)环PAHs趋势类似,均为P1、P2>P3>P6>P4、P5(P<0.05)。比表面积(SA)、总有机碳(TOC)、可溶解性有机碳(DOC)与各类PAHs的质量分数呈现一定的相关性,各类PAHs质量分数随SA的增大呈先增大随后减小趋势,最大质量分数所对应的SA为38~41 m2·g-1,随TOC的增加呈先减小随后增大趋势,最小质量分数所对应的TOC为7.0~8.7 g·kg-1。不同粒径土壤颗粒中,基于污染物毒性当量因子(TEF)的等效质量分数与污染物实际质量分数变化趋势并不相同,ΣPAHs16实际质量分数变化趋势为P1>P2、P3、P4、P6>P5(P<0.05),而其等效质量分数则为P1、P2、P3、P4、P6>P5(P<0.05)。 相似文献
132.
《Journal of environmental science and health. Part. B》2013,48(6):799-812
Impacts of flooding on the soil environment with regard to soil pollution with polycyclic aromatic hydrocarbons and s‐triazine (cyanazine, simazine, atriazine, propazine, prometryn) herbicides have been evaluated. No clear differences in the sum of the PAHs content were observed in the present studies. Only changes in the levels of individual PAHs were noted. In soils covered with flooding both at a depth of 0–20 and 20–40 high molecular weight PAHs were predominant (especially mutagenic and carcinogenic 5‐rings PAHs) whereas in non‐flooded areas, 2‐ and 3‐rings PAHs constituted over 80%. In the case of s‐triazine herbicides, no influence of flooding on the changes in their content in agriculturally used soils was noted. On the other hand, clearly lower levels of cyanazine, simazine and atriazine were not in the flooded forest soil as compared to the non‐flooded forest soil. 相似文献
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135.
Xiaoqing Ye Wuye Pan Chunming Li Xiaochen Ma Shanshan Yin Jianhong Zhou Jing Liu 《环境科学学报(英文版)》2020,32(5):1-9
Polycyclic aromatic hydrocarbons(PAHs) are a typical class of persistent organic pollutants that is ubiquitous worldwide.Previous animal studies suggested that PAHs had adverse effects on female reproduction.However,the human data regarding relationship of PAHs exposure with women reproductive health,such as ovarian dysfunction,are scarce.In this case-control study,the associations of serum levels of PAHs with the risk of premature ovarian failure(POF) and reproductive hormones in Chinese women ... 相似文献
136.
水中痕量多环芳烃(PAHs)类环境污染物检测方法的研究 总被引:10,自引:1,他引:10
对水中多环芳烃(PAHs)检测方法进行了系统研究,采用固相萃取技术进行样品前处理,以取代传统的液液萃取,并建立了优化的PAHs液相色谱分析条件,可以适用于美国EPA优先监控的水中16种PAHs的同时分析 相似文献
137.
连续流动-固相微萃取方法富集水中多环芳烃的探讨 总被引:2,自引:0,他引:2
建立了连续流动-固相微萃取富集、气相色谱测定水中多环芳烃的方法,探讨了流量和溶液体积对萃取效果的影响。方法在0μg/L-40μg/L范围内线性良好,8种多环芳烃的检出限为0.05μg/L-0.5μg/L,样品测定的相对标准偏差〈7%,加标回收率为87.0%~112%。 相似文献
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139.
Toxicological and biochemical responses of the earthworm Lumbricus rubellus to pyrene, a non-carcinogenic polycyclic aromatic hydrocarbon 总被引:7,自引:0,他引:7
The effects of the polycyclic aromatic hydrocarbon (PAH) pyrene on earthworms were investigated in contact and soil tests. In addition to measuring toxic effects on survival and reproduction, Ethoxyresorufin-o-deethylase (EROD) activity and catalase activity were also studied as possible biomarkers of toxic stress. The survival data indicated that LC50 values were 0.0068 mg/ml for the contact test, and 283 mg/kg in the soil test. Cocoon production rate was significantly reduced compared to controls at 160, 640 and 2560 mg/kg in the soil test. No EROD activity could be detected in preliminary studies using control and exposed animals from the contact test, so this assay was not used to the soil test. Catalase activity was shown to be significantly lower at 640 mg/kg in the soil test compared to all other treatments and the control. When compared to toxicological data for other soil invertebrates, Lumbricus rubellus has an intermediate sensitivity in respects of survival and a lower sensitivity for reproductive effects, although the soil used in this study had a higher organic content than previous studies, meaning that the sensitivity of this species may be underestimated in comparison to previous published data for other soil invertebrates. 相似文献
140.
Drilling methods can severely alter physical, chemical, and biological properties of aquifers, thereby influencing the reliability of water samples collected from groundwater monitoring wells. Because of their fast drilling rate, air-actuated hammers are increasingly used for the installation of groundwater monitoring wells in unconsolidated sediments. However, oil entrained in the air stream to lubricate the hammer-actuating device can contaminate subsurface sediments. Concentrations of total hydrocarbons, heavy metals (Cu, Ni, Cr, Zn, Pb, and Cd), and nutrients (particulate organic carbon, nitrogen, and phosphorus) were measured in continuous sediment cores recovered during the completion of a 26-m deep borehole drilled with a down-hole hammer in glaciofluvial deposits. Total hydrocarbons, Cu, Ni, Cr and particulate organic carbon (POC) were all measured at concentrations far exceeding background levels in most sediment cores. Hydrocarbon concentration averaged 124 +/- 118 mg kg(-1) dry sediment (n = 78 samples) with peaks at depths of 8, 14, and 20 m below the soil surface (maximum concentration: 606 mg kg(-1)). The concentrations of hydrocarbons, Cu, Ni, Cr, and POC were positively correlated and exhibited a highly irregular vertical pattern, that probably reflected variations in air loss within glaciofluvial deposits during drilling. Because the penetration of contaminated air into the formation is unpreventable, the representativeness of groundwater samples collected may be questioned. It is concluded that air percussion drilling has strong limitations for well installation in groundwater quality monitoring surveys. 相似文献