Small-scale waste incinerators in rural China:Potential risks of dioxin and polychlorinated naphthalene emissions  

作　　者：Lili Yang Guorui Liu Qingqing Zhu Minghui Zheng 

机构地区：[1]State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,P.O.Box 2871,Beijing,100085,China [2]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Emerging Contaminants》2019年第1期31-34,共4页新兴污染物（英文）

基　　金：We gratefully acknowledge support from the National 973 program(2015CB453100);the National Natural Science Foundation of China(21777172);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB14020102);Youth Innovation Promotion Association of the Chinese Academy of Sciences(2016038).

摘　　要：Rapid development has led to a tremendous increase in the volume of solid waste produced in rural China.The annual amount of solid waste produced from Chinese rural areas is approximately 110 million tons.Many small-scale solid waste incinerators have been built in Chinese rural areas.It was speculated that the emissions and potential risks of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs,commonly known as dioxins)and polychlorinated naphthalenes(PCNs)from these incinerators could be serious.A preliminary case investigation on PCDD/F and PCN emissions from a small-scale waste incinerator was performed.The stack gas samples were collected using auto isokinetic sampling techniques and PCDD/F and PCN congeners were identified and quantified by high resolution gas chromatography combined with high resolution mass spectrometry.Concentrations and toxic equivalents of PCDD/Fs emitted from the small-scale waste incinerator were 153 ngm^-3 and 5.6 ng TEQ m^-3,respectively,which was much higher than the regulatory level for municipal solid waste incinerators permitted in China and the European Union Directive.PCNs have similar toxicological effects with PCDD/Fs,and the relative potency factors(RPFs)of some PCN congeners(dioxin-like PCNs)to 2,3,7,8-tetrachlorinated dibenzo-p-dioxin(TCDD)were previously proposed to evaluate the dioxin-like toxicity of PCNs.The mass concentrations of PCNs and dioxin-like PCNs from the small-scale solid incinerator were 2927 ngm^-3 and 1137 ngm^-3,much higher than that of dioxins.However,much less attention has been paid to the small-scale incinerators compared with municipal solid waste incinerators.Here,we proposed that there should be a growing need to focus on the emissions and potential risks of dioxins and dioxin-like pollutants from these small-scale waste incinerators in rural China.

关 键 词：Small-scale waste incinerator Solid waste Rural area DIOXINS Emission 

分 类 号：X70[环境科学与工程—环境工程]