Characteristics of heavy metal migration in the gasification-combustion process of rural solid waste: Influencing factors and mechanisms

被引：6
作者：
Teng, Wen [1 ,2 ]
You, Zi [1 ,2 ]
Liao, Yanfen [1 ,2 ]
Chen, Zhuofan [1 ,2 ]
Qi, Xin [1 ,2 ]
Ma, Xiaoqian [1 ,2 ]
机构：
[1] South China Univ Technol, Sch Elect Power, Guangzhou 510640, Peoples R China
[2] Guangdong Prov Key Lab Efficient & Clean Energy Ut, Guangzhou 510640, Peoples R China
来源：
WASTE MANAGEMENT | 2024年 / 190卷
关键词：
Rural solid waste; Gasification-combustion; Heavy metals; Volatilization rate; Interaction effect; SEWAGE-SLUDGE; BOTTOM ASH; GAS-PHASE; INCINERATION; CHLORINE; SULFUR; VOLATILIZATION; PHOSPHORUS; PYROLYSIS; BEHAVIOR;
D O I：
10.1016/j.wasman.2024.09.031
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The miniaturized gasification-combustion model has potential advantages in treatment of rural solid waste (RSW) in China. In this study, the gasification-combustion technology concerning air-staged technology was employed in the treatment of seven combustible components in RSW, focusing on the analysis of heavy metal migration characteristics. Firstly, a comparison was made between combustion and gasification-combustion regarding the migration characteristics of heavy metals, demonstrating that gasification-combustion effectively reduces the volatilization rate of heavy metals. The largest reduction in volatility was 12.99 % for Cu. Secondly, this study explored reaction temperatures and oxygen concentration in the gasification zone, concluding that under experimental conditions mentioned herein, optimal gasification temperatures for curing heavy metals were determined to be 700 degrees C while maintaining an optimal ratio of air (RA) at 0.5 during gasification. Finally, the interaction of inorganic elements with different components on heavy metal migration was revealed by co-gasification-combustion of equal mass mixture of two components. The P, S, Cl contents and the inorganic mineralogical composition of the RSW are the key factors influencing the transport properties of heavy metals. The two-component synergistic effect of RSW studied in this paper has guiding significance for limiting the proportion of RSW components to control heavy metal emission in gasification-combustion process.
引用
收藏
页码：350 / 359
页数：10
相关论文
共 64 条
[1]   Process and technological aspects of municipal solid waste gasification. A review [J].
Arena, Umberto .
WASTE MANAGEMENT, 2012, 32 (04) :625-639
[2]  
Bin D., 2023, Design and Research of Pyrolysis Gasification and Combustion Integrated Unit for Village and Town Domestic Wastes
[3]   Air staging to reduce emissions from energy crop combustion in small scale applications [J].
Carroll, J. P. ;
Finnan, J. M. ;
Biedermann, F. ;
Brunner, T. ;
Obernberger, I. .
FUEL, 2015, 155 :37-43
[4]   Heavy Metals in Water, Sediments, and Aquatic Macrophytes: River Hindon, India [J].
Chabukdhara, Mayuri ;
Nema, Arvind K. .
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE, 2012, 16 (03) :273-281
[5]   Heavy metals chemical speciation and environmental risk of bottom slag during co-combustion of municipal solid waste and sewage sludge [J].
Chen, Limei ;
Liao, Yanfen ;
Ma, Xiaoqian ;
Lu, Shiguang .
JOURNAL OF CLEANER PRODUCTION, 2020, 262
[6]   Heavy metals volatilization characteristics and risk evaluation of co-combusted municipal solid wastes and sewage sludge without and with calcium-based sorbents [J].
Chen, Limei ;
Liao, Yanfen ;
Ma, Xiaoqian .
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 2019, 182
[7]   Co-incineration effect of sewage sludge and municipal solid waste on the behavior of heavy metals by phosphorus [J].
Chen, Minhsuan ;
Oshita, Kazuyuki ;
Takaoka, Masaki ;
Shiota, Kenji .
WASTE MANAGEMENT, 2022, 152 (112-117) :112-117
[8]   Study on synchronous immobilization technology of heavy metals and hydrolyzed nitrogen during pyrolysis of sewage sludge [J].
Chen, Runqi ;
Ma, Xiaoqian ;
Yu, Zhaosheng ;
Chen, Limei ;
Chen, Xinfei ;
Qin, Zhen .
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2021, 9 (05)
[9]   Fixation and partitioning of heavy metals in slag after incineration of sewage sludge [J].
Chen, Tao ;
Yan, Bo .
WASTE MANAGEMENT, 2012, 32 (05) :957-964
[10]   Insight into the gas pollutants emission of rural solid waste during the gasification-combustion process: Influencing factors and mechanisms [J].
Chen, Zhuofan ;
Liao, Yanfen ;
Chen, Yin ;
Ma, Xiaoqian .
FUEL, 2024, 355
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