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Reaction mechanism of arsenic capture by a calcium-based sorbent during the combustion of arsenic-contaminated biomass: A pilot-scale experience

引用

Frontiers of Environmental Science & Engineering 2019年第2期13卷 105-113页

作者： Mei Lei Ziping Dong Ying Jiang Philip Longhurst Xiaoming Wan Guangdong Zhou Center for Environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China School of Water Energyand EnvironmentCranfield UniversityMK43 0ALCranfieldUK

Large quantities of contaminated biomass due to phytoremediation were disposed through combustion in low-income rural regions of *** process provided a solution to reduce waste volume and disposal ***-scale combustion trials were conducted for in site disposal at phytoremediation *** reaction mechanism of arsenic capture during pilot-scale combustion should be determined to control the arsenic emission in flue *** study investigated three Pteris vittata *** with a disposal capacity of 600 kg/d and different arsenic concentrations from three sites in *** arsenic concentration in flue gas was greater than that of the national standard in the trial with no emission control,and the arsenic concentration in biomass was 486 mg/*** addition notably reduced arsenic emission in flue gas,and absorption was efficient when CaO was mixed with biomass at 10% of the total *** the trial with 10% CaO addition,arsenic recovery from ash reached 76%,which is an ~8-fold increase compared with the *** radiation analysis confirmed that calcium arsenate is the dominant reaction product.

关键词： Arsenic contamination Phytoremediation Emission control calcium-based sorbent Biomass disposal Pilot-scale combustion

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