页岩气开采钻井固体废物的污染特性

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Abstract Three shale gas fields in Chongqing were selected. The pollution characteristics of heavy metals, polycyclic aromatic hydrocarbons (PAHs) and petroleum hydrocarbons in wastewater-based and waste oil-based drilling cuttings from the shale gas mining of five drilling platforms were studied. The concentration of Ba in wastewater-based and waste oil-based drilling cuttings was significantly higher than that of other heavy metals. Zn, Ba, Cr, Ni, Cu and Pb were the main heavy metals in the wastewater-based drilling cuttings. While Ni, Cu, Zn, Pb, Ba, As, Cr were the main heavy metals in the waste oil-based drilling cuttings and among which the concentration of Ni, Cu, Zn and Pb exceeded the corresponding limit. The concentration of PAHs in wastewater-based and waste oil-based drilling cuttings were 1.74~14.8mg/kg and 302~595mg/kg, respectively, which did not exceed the limit of the identification standards for hazardous wastes-identification for toxic substance content. The concentration of the petroleum hydrocarbon in waste oil-based drilling cuttings was 112~213g/kg, which was much higher than the limit of the identification standards for hazardous wastes-identification for toxic substance content. At the same time, the concentration of BaP in the wastewater-based and waste oil-based drilling cuttings was higher than the limit of the soil environmental quality-risk control standard for soil contamination of agricultural land; the concentration of BaP, BbF, BkF and DahA in the waste oil-based drilling cuttings were higher than the screening values of the soil environmental quality-risk control standard for soil contamination of development land and the concentration of the petroleum hydrocarbons in the drilling cuttings were much higher than the intervention values.

Key words： shale gas solid waste heavy metals PAHs petroleum hydrocarbons pollution characteristics

Received: 22 August 2018

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X54

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	Articles by authors
	WU Na
	NIE Zhi-qiang
	LI Kai-huan
	SUN Ying-jie
	CAI Hong-ying
	ZHANG Man-li
	ZHOU Qiong
	HUANG Qi-fei

Cite this article:

WU Na,NIE Zhi-qiang,LI Kai-huan等. Pollution characteristics of solid waste in shale gas mining drilling[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 1094-1100.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I3/1094

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