生活垃圾重金属对环卫工人身体健康影响研究

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Abstract The As, Cd, Hg, Cr, and Pb contents (on a dry weight basis) of 55 municipal solid waste (MSW) samples from five cities (Guangzhou, Foshan, Huizhou, Shenzhen, and Zhaoqing) in the Pearl River Delta were determined. Principal component analysis was performed to assess the factors affecting the heavy metal concentrations and possibly identify the sources of the heavy metals. The health risks posed to sanitation workers exposed to heavy metals while collecting, sorting, and disposing of MSW were assessed using a combined health risk assessment model and Monte Carlo simulation. The mean As, Cd, Hg, Cr, and Pb concentrations in the MSW samples were (4.49±1.18)mg/kg, (1.95±1.96)mg/kg, (0.41±0.60)mg/kg, (147.28±160.48)mg/kg, and (121.59±199.42)mg/kg, respectively. Hg and Pb in MSW were probably mainly derived from metalware and materials with metallic coatings. Cd and Cr were derived from metalware and metallic coatings and also from fast food and packaging waste. Element As was probably main derived from soil and grass. Non-carcinogenic risks for workers during waste collection, sorting, and disposal to landfill could be ignored, but carcinogenic risks were very high. The highest carcinogenic risk index was about six times the safety threshold. The highest risks were posed through ingestion after hand-to-mouth contact (not through ingestion of food and drink). Non-carcinogenic and carcinogenic risks were both high for waste incineration workers, the highest non-carcinogenic and carcinogenic risk indices being 11 and 90 times, respectively, the safety thresholds. The highest risks were posed through ingestion after hand-to-mouth contact and inhalation. Non-carcinogenic and carcinogenic risks were slightly higher for female than male workers for the same exposure situations. Precautions must therefore be taken to decrease the exposure of workers to heavy metals during waste collection, sorting, and disposal.

Key words： municipal solid waste(MSW) heavy metals exposure pathways sanitation workers health risk

Received: 15 June 2018

PACS:	X799.3
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	TANG Zhi-hua
	HUHE Tao-li
	LIU Min-ru
	YIN Hua
	GUO Hua-fang
	XIONG Zu-hong
	CHEN Yong

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TANG Zhi-hua,HUHE Tao-li,LIU Min-ru等. Study on influencing of heavy metal in municipal solid waste on health of sanitation workers[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 1278-1288.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I3/1278

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