电石法聚氯乙烯行业履约的成本效益分析

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Abstract Mercury mass balance has been modelled for the calcium carbide process polyvinyl chloride (CCPVC) production with high-mercury catalyst and low-mercury catalyst respectively to identify the generation, transformation and emission of mercury. Further, cost benefit analysis has been conducted to compare the different responses of a typical enterprise to meet the requirements of the Minamata Convention on Mercury by low-mercury catalyst substitution. The case enterprise will reduce atmospheric and wastewater mercury emissions by 25% and 85.7%~98.9% respectively with the convention compliance, with the net benefits increasing by 50.7%~55.4%. The most profitable option for the case enterprise will be recycling waste catalyst inside plant and improving mercury abatement facilities, but the environmental risks from mercury-bearing solid waste are non-negligible. The reason is that the Minamata Convention on Mercury focuses on the input rather than emission of mercury in CCPVC industry. In addition, the current environmental tax rate on mercury is below the optimal level, indicating the insufficient incentives for the CCPVC enterprises to control mercury emissions. In order to improve the effectiveness of the Minamata Convention on Mercury, it is necessary to promote building mercury mass balance in China's CCPVC industry, strengthen the supervision of mercury-bearing solid waste stockpiles, raise the environmental tax rate levied on mercury emissions, and take the amount of environmental risk substances as the tax basis for solid wastes.

Key words： Minamata Convention on Mercury calcium carbide process polyvinyl chloride production mercury mass balance model cost benefit analysis environmental tax

Received: 25 October 2021

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X196

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	CHANG Dun-hu
	ZHANG Ze-yang
	ZHOU Ji
	MA Zhong
	WANG Zu-guang

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CHANG Dun-hu,ZHANG Ze-yang,ZHOU Ji等. Cost benefit analysis of implementation of Minamata Convention on Mercury in calcium carbide process polyvinyl chloride industry[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2931-2941.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I6/2931

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