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 

作者机构：State Key Laboratory of Environmental Chemistry and EcotoxicologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesP.O.Box 2871Beijing100085China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Emerging Contaminants》 (新兴污染物（英文）)

年 卷 期：2019年第5卷第1期

页      面：31-34页

学科分类：1007[医学-药学(可授医学、理学学位)] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 08[工学] 

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). 

主　　题：Small-scale waste incinerator Solid waste Rural area Dioxins Emission 

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.