1
|
Li S, Zhang M, Hu H, Guo G, Gong L, Dong L, Xu S, Yao H. Fate of sulfur and chlorine during co-incineration of municipal solid waste and industrial organic solid waste. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:171040. [PMID: 38369161 DOI: 10.1016/j.scitotenv.2024.171040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/02/2024] [Accepted: 02/15/2024] [Indexed: 02/20/2024]
Abstract
In China, the co-incineration of municipal solid waste (MSW) with industrial organic solid waste (IOSW) is increasingly adopted. Compared with MSW, IOSW contains higher levels of sulfur (S) and chlorine (Cl), presenting significant challenges for controlling S/Cl emissions in MSW incineration plants. In this study, the impact of co-incinerating IOSW was investigated in a 500 t/d incinerator grate, focusing on the emissions and transformation behaviors of S/Cl. IOSW, with a consistent sulfur content of about 0.22 wt% and a more variable chlorine content averaging 0.53 wt%, contains over 40 % organic sulfur and >90 % organic chlorine, higher than in MSW. The results of co-incineration experiments showed that the median SO2 concentration in the flue gas was stable at 50 mg/m3, while HCl concentration decreased initially and then increased as the co-incineration ratio of IOSW rose from 20 % to 40 %. Furthermore, the concentrations of SO2 and HCl were not significantly influenced by wind flow but were positively affected by the rising furnace temperatures. Besides, the co-incineration ratio had minimal impact on sulfur in fly ash before deacidification, primarily derived from the gas stream. However, the (Na + K)/Cl ratio in fly ash progressively increased from 1.5 to 1.9, and the Ca content decreased from 0.35 % to 0.15 % as the co-incineration ratio rose to 40 %, indicating more chlorine migration into the fly ash at higher co-incineration rates. This research offers essential guidance for effectively controlling pollutant emissions during the co-incineration of IOSW, specifically the S/Cl pollutants.
Collapse
Affiliation(s)
- Shuai Li
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Mingmei Zhang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hongyun Hu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Guangzhao Guo
- Grandblue (Foshan) Green Electricity Solid Waste Management Co., Ltd, Foshan 528200, China
| | - Lifang Gong
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China; Grandblue (Foshan) Green Electricity Solid Waste Management Co., Ltd, Foshan 528200, China
| | - Lu Dong
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Sihua Xu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hong Yao
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| |
Collapse
|
2
|
Duan L, Yun Q, Jiang G, Teng D, Zhou G, Cao Y. A review of chloride ions removal from high chloride industrial wastewater: Sources, hazards, and mechanisms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 353:120184. [PMID: 38310791 DOI: 10.1016/j.jenvman.2024.120184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/23/2023] [Accepted: 01/20/2024] [Indexed: 02/06/2024]
Abstract
To reduce metal pipe corrosion, improve product quality, and meet zero liquid discharge (ZLD) criteria, managing chloride ion concentrations in industrial wastewaters from metallurgical and chemical sectors has become increasingly important. This review provides detailed information on the sources, concentration levels, and deleterious effects of chloride ions in representative industrial wastewaters, and also summarizes and discusses various chloride ion removal techniques, including precipitation, ion exchange, physical separation, and advanced oxidation (AOPs). Among these, AOPs are particularly promising due to their ability to couple with other technologies and the diversity of their auxiliary technologies. The development of dechlorination electrode materials by electro-adsorption (CDI) can be inspired by the electrode materials used in chloride ion battery (CIB). This review also provides insights into exploring the effective combination of multiple chloride removal mechanisms, as well as the development of environmentally friendly composite materials. This review provides a theoretical basis and development direction for the effective treatment and secondary utilization of chlorine-containing industrial wastewater in the future.
Collapse
Affiliation(s)
- Lizhe Duan
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Qinghang Yun
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Gaoliang Jiang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Daoguang Teng
- The Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Guoli Zhou
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China; The Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou, 450001, China.
| | - Yijun Cao
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China; The Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou, 450001, Henan, China.
| |
Collapse
|
3
|
Palma A, Clemente-Castro S, Ruiz-Montoya M, Giráldez I, Díaz MJ. Pyrolysis of municipal solid waste compost: Pilot plant evaluation as a sustainable practise of waste management. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2023:734242X231200744. [PMID: 37791483 DOI: 10.1177/0734242x231200744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
To evaluate the potential of compost based on municipal solid waste (MSW) and 20% legume pruning under a pyrolysis process, generated products, including solids (biochar), liquids (bio-oil), and gases (non-condensable gases), through experimentation in a pilot plant with a fluidized bed reactor at 450°C and gas chromatography/mass spectrometry have been analysed. In addition, the compost kinetic behaviour by thermogravimetric analysis (TGA), using the Flynn-Wall-Ozawa (FWO) method, has been investigated. Four different reaction zones, associated with lignocellulosic materials (hemicellulose, cellulose, and lignin) with a first step for water evaporation, in TGA curve have been observed. A biochar with low stability and aromaticity, considering high and low O/C and H/C ratios, respectively, has been obtained. The obtained pyrolytic liquids contain a high concentration of phenolic compounds because of a significant presence of lignins and other high molecular weight compounds in the original material. Moreover, the generated non-condensable gases consist mainly of short-chain compounds, such as alcohols, aldehydes, and alkenes produced from hemicellulose, cellulose, and proteins.
Collapse
Affiliation(s)
- A Palma
- Pro2TecS-Product Technology and Chemical Processes Research Centre, Department of Chemical Engineering, Physical Chemistry and Materials Science, University of Huelva, Huelva, Spain
| | - S Clemente-Castro
- ProTecS-Product Technology and Chemical Processes Research Centre, Department of Chemical Engineering, Physical Chemistry and Materials Science, University of Huelva, Huelva, Spain
| | - M Ruiz-Montoya
- ProTecS-Product Technology and Chemical Processes Research Centre, Department of Chemical Engineering, Physical Chemistry and Materials Science, University of Huelva, Huelva, Spain
| | - I Giráldez
- Pro2TecS-Product Technology and Chemical Processes Research Centre, Department of Chemistry 'Prof. José Carlos Vílchez Martín', University of Huelva, Huelva, Spain
| | - M J Díaz
- ProTecS-Product Technology and Chemical Processes Research Centre, Department of Chemical Engineering, Physical Chemistry and Materials Science, University of Huelva, Huelva, Spain
| |
Collapse
|
4
|
Song Z, Zhang X, Tan Y, Zeng Q, Hua Y, Wu X, Li M, Liu X, Luo M. An all-in-one strategy for municipal solid waste incineration fly ash full resource utilization by heat treatment with added kaolin. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 329:117074. [PMID: 36586325 DOI: 10.1016/j.jenvman.2022.117074] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 12/15/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
Resourcization has become a popular research topic for the final disposal of municipal solid waste incineration fly ash (MSWI FA). However, the current research is limited to building material preparation or valuable chloride recovery, which may cause resource waste and secondary pollution. A unique process, heat treatment with the addition of kaolin (KL), was presented to achieve complete resource utilization of MSWI FA. The physical properties of ceramsite could be improved by adding KL, and dioxin removal, heavy metals, and valuable chloride separation could be achieved via sintering at 1150 °C. The separation and purification of dust carried by the flue gas during thermal treatment (secondary fly ash) was achieved via wet separation. A building ceramsite with a compressive strength of 24.8 MPa was obtained, whereas dioxin and heavy metal toxicity were far below the standard limits. Heavy metal content was enriched by 12 times, approximately 59.6%, achieved after secondary fly ash separation and purification. A heavy metal product containing 39.5% Zn, 19.1% Pb, and chloride salt containing 41.8% KCl were obtained. This showed a high potential for the developed process to separate multiple valuable elements from ashes. This novel process will further promote the development and application of harmless and resourceful technologies for MSWI FA.
Collapse
Affiliation(s)
- Zhijun Song
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Xiaowen Zhang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Soil Pollution Control and Remediation, University of South China, Hengyang, 421001, China.
| | - Yujiao Tan
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Qin Zeng
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Yilong Hua
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Soil Pollution Control and Remediation, University of South China, Hengyang, 421001, China
| | - Xiaoyan Wu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Soil Pollution Control and Remediation, University of South China, Hengyang, 421001, China
| | - Mi Li
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Soil Pollution Control and Remediation, University of South China, Hengyang, 421001, China
| | - Xudong Liu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Mingliang Luo
- Hunan Qinglian Environmental Protection Technology Co., Ltd., Hengyang, 421000, China
| |
Collapse
|
5
|
Wei X, Xie F, Dong C, Wang P, Xu J, Yan F, Zhang Z. Safe disposal of hazardous waste incineration fly ash: Stabilization/solidification of heavy metals and removal of soluble salts. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116246. [PMID: 36162320 DOI: 10.1016/j.jenvman.2022.116246] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/22/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
Hazardous waste incineration fly ash (HFA) is considered a hazardous waste owing to the high associated concentrations of heavy metals and soluble salts. Hence, cost effective methods are urgently needed to properly dispose HFA. In this study, geopolymers were prepared by alkali-activation technology to stabilize and solidify heavy metals in HFA. In addition, the effects of three different aluminosilicates (metakaolin, fly ash, and glass powder) on the heavy metal immobilization efficiency were investigated. Because the soluble salt content of HFA is too high for their direct placement in flexible landfill sites and water washing can lead to heavy metal leaching, water-washing experiments were conducted after alkali-activation treatment to remove soluble salts. The results suggest that the concentrations of heavy metals leached from geopolymers can satisfy the Chinese Standard limits (GB18598-2019) when the addition of aluminosilicates exceeds 20 wt%. More than 77% of Cl- and >64% of SO42- in geopolymers could be removed via water-washing treatment. The Zn leaching concentration was maintained below approximately 0.52 ppm. After alkali-activation treatment, the water-washing process could efficiently remove soluble salts while inhibiting heavy metal leaching. Sodium-aluminosilicate-hydrate (N-A-S-H) gel, a product of the geopolymerization process in this study, was demonstrated to act as a protective shell that inhibited heavy metal leaching. Hence, HFA-based geopolymers are considered suitable for disposal in flexible landfills.
Collapse
Affiliation(s)
- Xuankun Wei
- School of Environmental Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, PR China; College of Engineering, Peking University, Beijing 100871, PR China
| | - Feng Xie
- School of Environmental Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, PR China
| | - Chunling Dong
- School of Environmental Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, PR China
| | - Pengju Wang
- School of Environmental Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, PR China
| | - Jiyun Xu
- China Everbright Greentech LTD, Hong Kong, PR China
| | - Feng Yan
- School of Environmental Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, PR China
| | - Zuotai Zhang
- School of Environmental Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, PR China.
| |
Collapse
|
6
|
Liu J, Wang Z, Xie G, Li Z, Fan X, Zhang W, Xing F, Tang L, Ren J. Resource utilization of municipal solid waste incineration fly ash - cement and alkali-activated cementitious materials: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158254. [PMID: 36028021 DOI: 10.1016/j.scitotenv.2022.158254] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/20/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
The increase in municipal solid waste (MSW) production has led to an increase in MSW incineration fly ash (MSWIFA) production. MSWIFA contains toxic and harmful substances such as heavy metals and dioxins, which can cause harm to the environment if not treated properly. Only a few MSWIFAs will be landfilled directly, and the rest will need to be treated by other methods. The treatment of MSWIFA can be divided into three types: separation, stabilization/solidification (S/S), and thermal treatment, which are either not fully developed or too costly. Resource utilization is a sustainable means of treating MSWIFA. MSWIFA is used in the production of cement and alkali-activated cementitious materials as a means of resource utilization with significant advantages. This can alleviate the consumption of nature and reduce greenhouse gas emissions in conventional cement production. Compared with MSWIFA cement, MSWIFA alkali-activated cementitious material can be achieved with almost no consumption of natural resources, which is worthy of further research to realize the large-scale application of MSWIFA. At the end of the paper, the perspective of separation of dioxins from MSWIFA, co-processing of MSWI ash, and production of "MSWIFA green materials" is presented.
Collapse
Affiliation(s)
- Jun Liu
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhengdong Wang
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Guangming Xie
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhenlin Li
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xu Fan
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Weizhuo Zhang
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Feng Xing
- Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
| | - Luping Tang
- Department of Architecture and Civil Engineering, Division of Building Technology, Chalmers University of Technology, 41296 Gothenburg, Sweden
| | - Jun Ren
- School of Architecture and Planning, Yunnan University, Kunming 650051, China
| |
Collapse
|
7
|
Zhang J, Mao Y, Wang W, Wang X, Li J, Jin Y, Pang D. A new co-processing mode of organic anaerobic fermentation liquid and municipal solid waste incineration fly ash. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 151:70-80. [PMID: 35930842 DOI: 10.1016/j.wasman.2022.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/07/2022] [Accepted: 07/16/2022] [Indexed: 06/15/2023]
Abstract
A new co-processing mode of waste liquid from anaerobic fermentation of organic wastes and municipal solid waste incineration fly ash (MSWI-FA) dechlorination is reported in this paper. Taking acetic acid, the most common organic acid in anaerobic fermentation systems, as the representative of anaerobic fermentation organic acids, the improvement of the dechlorination effect and the mechanism of washing MSWI-FA with low concentrations of organic acid lotion were explored. The chlorine content of MSWI-FA was reduced to 0.82% after the optimal process washing pretreatment. Three anaerobic fermentation waste liquids (AFWLs) were used to verify that the chlorine content of MSWI-FA could be reduced to less than 1%, and the dechlorination effect of brewery wastewater, which reduced the chlorine content of MSWI-FA to 0.91%, was the best at this. The influence of the washing process on MSWI-FA pyrolysis was reflected in the whole process. The release of chloride decreased and the weight loss was mainly due to the release of CO2. The melting point of MSWI-FA, washed by the optimal process, was reduced by nearly 30 ℃, and only 0.06% chlorine remained after calcination at 1100 ℃, which was extremely beneficial in reducing the release of trace elements in MSWI-FA during heat treatment, and for the preparation of cement raw meal.
Collapse
Affiliation(s)
- Jiazheng Zhang
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Yanpeng Mao
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China.
| | - Wenlong Wang
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Xujiang Wang
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Jingwei Li
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Yang Jin
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Dongjie Pang
- National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China
| |
Collapse
|
8
|
Yan M, Jiang J, Zheng R, Yu C, Zhou Z, Hantoko D. Experimental study on the washing characteristics of fly ash from municipal solid waste incineration. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2022; 40:1212-1219. [PMID: 34967247 DOI: 10.1177/0734242x211068253] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The disposal of fly ash with high salt content has become an important bottleneck for the further application of municipal solid waste incineration (MSWI). In this study, the soluble salt content and composition of fly ash from different MSWI were analysed. The composition of fly ash was affected by incinerator type and flue gas cleaning system, especially the type of deacidification solvent. The soluble salt content in fly ash from MSW grate incinerator can be over 35.16%. Most of the soluble salt was calcium salt and chloride salt. The effect of washing parameters including liquid/solid (L/S) ratio and washing time on salt removal from fly ash were studied. Raw fly ash contained high chlorine (Cl) with the maximum of 19.83% and it can be significantly reduced by washing. Double-washing and secondary-washing had better performance than single-washing on salt removal. The secondary-washing did not only save water, but also reduced the energy cost during evaporation for crystallising soluble salt. Based on the analysis of variance (ANOVA), L/S ratio was the most principal factor for salt and Cl removal of fly ash by washing.
Collapse
Affiliation(s)
- Mi Yan
- Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Jiahao Jiang
- Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Rendong Zheng
- Hangzhou Linjiang Environmental Energy Co. Ltd., Hangzhou, China
| | - Caimeng Yu
- Zhejiang Zheneng Xingyuan Energy Saving Technology Co. Ltd, Hangzhou, China
| | - Zhihao Zhou
- Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Dwi Hantoko
- Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, China
- Department of Chemical Engineering, Institut Teknologi Bandung, Bandung, Indonesia
| |
Collapse
|
9
|
Liu S, Hou X, Yu C, Pan X, Ma J, Liu G, Zhou C, Xin Y, Yan Q. Integration of wastewater treatment units and optimization of waste residue pyrolysis conditions in the brominated phenol flame retardant industry. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.07.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
10
|
Nguyen TT, Tsai CK, Horng JJ. Sustainable Recovery of Valuable Nanoporous Materials from High-Chlorine MSWI Fly Ash by Ultrasound with Organic Acids. Molecules 2022; 27:2289. [PMID: 35408687 PMCID: PMC9000401 DOI: 10.3390/molecules27072289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 03/23/2022] [Accepted: 03/30/2022] [Indexed: 11/16/2022] Open
Abstract
The new technology development for municipal solid waste incineration fly ash treatment and reuse is urgent due to landfill shortage and environmental effect of leached hazardous substances. Chlorine (Cl) is worth considering due to its high levels in fly ash. In this study, a treatment process of ultrasound combined with organic acid was used to eliminate Cl from fly ash to enhance its properties for reuse. Taguchi methodology was implemented to design the experiments by controlling four impact factors and the contribution of each factor was evaluated by the ANOVA analysis of variance. Following two treatment steps within 5 min with a solid/liquid ratio of 1:10 at 165 kHz, 98.8% of Cl was eliminated. Solid/liquid ratio was the most prominent factor that contributed to the Cl removal with more than 90%, according to the ANOVA analysis of variance. Tert-butyl alcohol (tBuOH), an •OH radical scavenger, was utilized to examine different effects of ultrasonic cavitation on Cl removal efficiency. A 20 kHz ultrasound was used to explore the influence of multi-frequency ultrasound with different mechanical and sonochemical effects on the fly ash dechlorination. This ultrasonic-assisted organic acid treatment was found to be a time and cost-effective pathway for fly ash Cl removal.
Collapse
Affiliation(s)
- Tam Thanh Nguyen
- Faculty of Environment, University of Science (VNUHCM), Ho Chi Minh City 700000, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam
| | - Cheng-Kuo Tsai
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan;
| | - Jao-Jia Horng
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan;
| |
Collapse
|
11
|
Shen W, Zhu N, Xi Y, Huang J, Li F, Wu P, Dang Z. Effects of medical waste incineration fly ash on the promotion of heavy metal chlorination volatilization from incineration residues. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:128037. [PMID: 34906873 DOI: 10.1016/j.jhazmat.2021.128037] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
High contents of heavy metals and Cl are major challenges for incineration residue disposal. Classification by the Chinese government and the coronavirus disease 2019 pandemic have changed the characteristics of incineration residues, thereby increasing the difficulty of disposal. In this study, medical waste incineration fly ash (MWI FA) was proposed as an additive to promote chlorination volatilization of heavy metals from municipal solid waste incineration fly ash (MSWI FA) and medical waste incineration slag (MWI S). When the mixing ratio of MWI FA to MSWI FA was 1:3, the chlorination volatilization efficiencies of Cu, Zn, Pb, and Cd at 1000 °C for 60 min were 50.2%, 99.4%, 99.7%, and 97.9%, respectively. When MWI FA was mixed with MWI S at a ratio of 1:1, the chlorination volatilization efficiencies of Cu, Zn, Pb, and Cd at 1200 °C for 40 min were 88.9%, 99.7%, 97.3%, and 100%, respectively. Adding MWI FA can replenish Cl in MSWI FA and MWI S while increasing the surface area and forming pore structures by sublimation of NaCl and decomposition of CaSO4, or can reduce the melting point and viscosity by Na2O destroying the glass matrix. Therefore, MWI FA can be co-disposed with MSWI FA and MWI S respectively to enhance the chlorination volatilization of heavy metals.
Collapse
Affiliation(s)
- Weiqing Shen
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education, Guangzhou 510006, PR China; Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, PR China.
| | - Yunhao Xi
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Junlin Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Fei Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education, Guangzhou 510006, PR China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education, Guangzhou 510006, PR China
| |
Collapse
|
12
|
Ji Z, Huang B, Gan M, Fan X, Wang G, Zhao Q, Xing J, Yuan R. Dioxins control as co-processing water-washed municipal solid waste incineration fly ash in iron ore sintering process. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127138. [PMID: 34537647 DOI: 10.1016/j.jhazmat.2021.127138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/25/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
Co-processing water-washed municipal solid waste incineration fly ash (WM-FA) in iron ore sintering process is of great prospect. In this paper, the emission characteristics of dioxins during sintering process combined with WM-FA were studied, and the control method for dioxins was proposed. The results showed that adding WM-FA in the form of pellets with diameter 5-8 mm slightly influenced sinter quality. Increasing the diameter of WM-FA from 5-8 mm to 10-12 mm helped to reduce the concentration of PCDD/Fs from 1.0425 ng I-TEQ/N m3 to 0.7720 ng I-TEQ/N m3. However, compared with no WM-FA adding case, adding WM-FA pellets caused the increase of PCDD/Fs concentration in the sintering flue gas. A novel method for dioxin control was proposed through preparing WM-FA into 5-8 mm pellets and coated with CaO-containing additive with its function to adsorb and fix HCl and Cl2, which were the key components to synthesize dioxin. Due to the inhibiting effect of CaO to the chlorination reaction, the emission concentration of PCDD/Fs was decreased to 0.6240 ng I-TEQ/N m3, which was lower than that of no WM-FA adding case. The research findings lay a foundation for the resource utilization of WM-FA and the harmonious development of city and steel plant.
Collapse
Affiliation(s)
- Zhiyun Ji
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Binbin Huang
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Min Gan
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China.
| | - Xiaohui Fan
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Guojing Wang
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China.
| | - Qianqian Zhao
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China; Baowu Group Environmental Resources Technology Co. Ltd., Shanghai 201900, PR China
| | - Jinxin Xing
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Ruirui Yuan
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| |
Collapse
|
13
|
Xu S, Hu H, Guo G, Gong L, Liu H, Yao H. Investigation of properties change in the reacted molten salts after molten chlorides cyclic thermal treatment of toxic MSWI fly ash. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126536. [PMID: 34332484 DOI: 10.1016/j.jhazmat.2021.126536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 06/09/2021] [Accepted: 06/27/2021] [Indexed: 06/13/2023]
Abstract
To realize the thermal detoxification of municipal solid waste incineration (MSWI) fly ash in a relatively mild environment, molten salts thermal treatment technology was proposed in our previous research, which showed good effects. To investigate the properties of molten salts (NaCl-CaCl2) during cycling reusing, the change of the main components and the physical properties of the used molten salts were estimated. Results showed that the salts in fly ash would dissolve into molten salts. During this process, the concentration of K+, SO42- kept increasing while Cl- was decreased. The changing trend of Na+ and Ca2+ was dependent on the ratio of Ca/Na in raw fly ash. Ca(OH)2 in fly ash would react with CaCl2 to form CaClOH. Moreover, the introduction of the salt components on the thermal properties of molten salts were also studied. The melting point hardly changed by NaCl, CaSO4, and SiO2. Nevertheless, it was lowered to 431 °C with 15% CaCO3 addition, while increased to 523 °C with 20% KCl. Besides, there were no significant influences on the viscosity, stability, and thermal diffusivity of molten salts. KCl had the greatest influence on the specific heat capacity of molten salt, with an increase of about 20%.
Collapse
Affiliation(s)
- Sihua Xu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hongyun Hu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Guangzhao Guo
- Brand Blue Green Power Solid Waste Treatment (Foshan) Co., Ltd, Foshan 528200, China
| | - Lifang Gong
- Brand Blue Green Power Solid Waste Treatment (Foshan) Co., Ltd, Foshan 528200, China
| | - Huimin Liu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hong Yao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| |
Collapse
|
14
|
Sustainable process for the treatment of LYSO scrap and separation of lutetium using diglycolamide-based task-specific ionic liquids. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
15
|
Xu S, Yang F, Hu H, Gao L, Chen T, Cao C, Yao H. Investigation and improvement of the desulfurization performance of molten carbonates under the influence of typical pyrolysis gases. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 124:46-53. [PMID: 33601177 DOI: 10.1016/j.wasman.2021.01.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 12/21/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
Co-pyrolysis with oxygen-lean waste tires could improve the quality of pyrolytic oil from the bio-wastes while H2S/COS generated during co-pyrolysis process has a negative impact on the utilization of oil/syngas as well as the flue gas pollution control. Compared to traditional wet desulfurization process, high-temperature desulfurization via molten carbonates could reduce heat loss and favor the recycling of captured sulfur. Notably, small-molecule pyrolytic gases might change the species of sulfur-containing gases and promote the re-emission of absorbed sulfur from the molten salts. To fully understand the effects of pyrolysis gases (H2/CO/H2O/CO2) on molten salts desulfurization efficiency as well as mutual conversion mechanism of H2S and COS, equilibrium compositions calculations and adsorption experiments were carried out in the present study. The results showed that H2/CO had few effects on molten salts desulfurization performance and mutual conversion of H2S/COS. In contrast, CO2 and H2O had obvious adverse effects on desulfurization efficiency through the transferring of free S2- into emitted sulfur-containing gases. More specifically, only a small amount of CO2 reacted with S2- to produce COS while more S2- was converted to H2S and released from the reactor outlet when H2O was introduced. Fortunately, the impact of H2O or CO2 on molten salts desulfurization could be weakened with the addition of CaCO3 by transferring the molten free S2- into precipitated CaS. Besides, multi-stage desulfurization units connected in series and parallel were proposed and estimated, which was confirmed to show good performance to maintain the high desulfurization efficiency from the complicated pyrolytic gases.
Collapse
Affiliation(s)
- Sihua Xu
- Hubei University of Technology, School of Civil & Environment Engineering, Wuhan 430068, China; State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Fu Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hongyun Hu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Linxia Gao
- Hubei University of Technology, School of Civil & Environment Engineering, Wuhan 430068, China.
| | - Tongzhou Chen
- Wuhan Research Institute of Materials Protection, Wuhan 430030, China
| | - Chengyang Cao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hong Yao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| |
Collapse
|
16
|
Chen TL, Chen YH, Dai MY, Chiang PC. Stabilization-solidification-utilization of MSWI fly ash coupling CO 2 mineralization using a high-gravity rotating packed bed. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 121:412-421. [PMID: 33445114 DOI: 10.1016/j.wasman.2020.12.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 12/12/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Municipal solid waste incineration fly ash (MSWI-FA) has been regulated as a hazardous waste that needs to treat with stabilization, solidification and landfill due to its amount of heavy metals, chlorides, sulfates and dioxin. While the proper treated MSWI-FA can be utilized as pozzolanic material to reduce the usage of Portland cement. The present article aims to develop an integrated wet-extraction and carbonation process for MSWI-FA stabilization, solidification and utilization via the high-gravity technology. A benchtop experiment demonstrated the dechlorination and CO2 sequestration of MSWI-FA and the carbonated product was applied as a supplementary cementitious material (SCM) in the cement mortar. Physical, chemical and thermal characteristics of raw, wet-extracted, and carbonated MSWI-FA were addressed in terms of the mean diameter, micropore area, micropore volume, chemical compositions, mineralogy and morphology. The effects of the liquid-to-solid ratio and high gravity factor were evaluated. Overall, a chloride extraction ratio of 36.35% and a CO2 capture capacity of 258.5 g-CO2 kg-FA-1 were achieved in the batch experiment. The results of water-energy consumption of chloride removal and CO2 fixation provided a novel insight into the future process criterion. In addition, the carbonated FA was found as binder to partially substitute Portland cement due to its large content of calcium carbonate. The workability and mechanical strength of cement mortar with partial substitution of stabilized FA were evaluated to determine the potential FA utilization pathway. Finally, the continuous process tests determined the key operation indexes for future process scale-up.
Collapse
Affiliation(s)
- Tse-Lun Chen
- Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Da-an District, Taipei City 10673, Taiwan
| | - Yi-Hung Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhongxiao E. Road, Taipei City 10608, Taiwan
| | - Ming-Yen Dai
- Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Da-an District, Taipei City 10673, Taiwan
| | - Pen-Chi Chiang
- Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Da-an District, Taipei City 10673, Taiwan.
| |
Collapse
|
17
|
Zhang L, Lv P, He Y, Li S, Peng J, Zhang L, Chen K, Yin S. Ultrasound-assisted cleaning chloride from wastewater using Friedel's salt precipitation. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123545. [PMID: 32795817 DOI: 10.1016/j.jhazmat.2020.123545] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 07/19/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
The chloride salt derived from the rare earth smelting wastewater was effectively dislodged using Friedel's salt precipitation assisted with ultrasonic enhancement. Various single factors such as the reagent ratio, temperatures, reaction time and agitation speed were determined and investigated systematically. Results showed that the optimal single-stage removal efficiency were 88.22% and 80.89% with and without ultrasonic strengthen, respectively. The particle size distribution, morphology and elemental analysis of the precipitation were carried out by TEM, SEM, EDS and XRD analysis. These results revealed that the effect of ultrasonic has been given prominence to the removal efficiency of chloride salt. It is attributed to the cavitation and mechanical disturbance effect of ultrasound. In order to further decline the chloride, a two-stage de-chlorination carried out, the result indicated that the concentration of chloride was 120 mg/L and 430 mg/L with and without ultrasonic strengthening afterwards two-stage de-chlorination, respectively. The chloride concentration can fully meet the effluent concentration requirement under the effect of ultrasonic enhancement.
Collapse
Affiliation(s)
- Liangjing Zhang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Peng Lv
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Yuan He
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Shiwei Li
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Jinhui Peng
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Libo Zhang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Kaihua Chen
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China
| | - Shaohua Yin
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; Kunming Key Laboratory of Special Metallurgy, Kunming, Yunnan 650093, China.
| |
Collapse
|
18
|
Zhan X, Wang L, Wang L, Gong J, Wang X, Song X, Xu T. Co-sintering MSWI fly ash with electrolytic manganese residue and coal fly ash for lightweight ceramisite. CHEMOSPHERE 2021; 263:127914. [PMID: 32822940 DOI: 10.1016/j.chemosphere.2020.127914] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/28/2020] [Accepted: 08/03/2020] [Indexed: 06/11/2023]
Abstract
The MSWI fly ash (FA) is classified as hazardous waste and electrolytic manganese residue (EMR) as the harmful industrial waste. FA, water-washed FA (WFA), EMR and coal fly ash (CFA) were co-recycled to form lightweight MFCE ceramisites. The effects of FA, WFA and mixed MSWI fly ash on ceramisites were discussed. The approach to mixing FA and WFA increased the recycling amount of MSWI fly ash. The optimal mixture of 34.5% EMR, 24.1% CFA, 20.7% FA and 20.7% WFA sintered at 1160 °C for 12 min with a procedural heating rate (10 °C/min) and belonged to Class 800 artificial lightweight aggregate (GB/T 17431.1-2010); the quantity of MSWI fly ash in ceramisite was as high as 41.4%. Volatilization rates of Cd, Pb, Cu, Zn, Mn and Cr for ceramisite were higher 75.0, 24.2, 62.7, 133, 343 and 764% than FA respectively, attributed to the co-existence of chlorides and sulfates. The remained Zn, Cu, Pb, Mn and Cr were exchanged with Mg2+/Ca2+/Al3+ of diopside and wollastonite to form residual fractions. Our findings provided a feasibility method of co-recycling MSWI fly ash and electrolytic manganese residue to produce green lightweight aggregates.
Collapse
Affiliation(s)
- Xinyuan Zhan
- Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; College of Environment and Ecology, Chongqing University, Chongqing, 400044, PR China
| | - Li'ao Wang
- Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; College of Environment and Ecology, Chongqing University, Chongqing, 400044, PR China.
| | - Lei Wang
- Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China
| | - Jian Gong
- Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; College of Environment and Ecology, Chongqing University, Chongqing, 400044, PR China
| | - Xiang Wang
- Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China; College of Environment and Ecology, Chongqing University, Chongqing, 400044, PR China
| | - Xue Song
- College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, PR China
| | - Tengtun Xu
- College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067, PR China
| |
Collapse
|
19
|
Wang X, Wang M, Zou D, Wu C, Li T, Gao M, Liu S, Wang Q, Shimaoka T. Comparative study on inorganic Cl removal of municipal solid waste fly ash using different types and concentrations of organic acids. CHEMOSPHERE 2020; 261:127754. [PMID: 32738714 DOI: 10.1016/j.chemosphere.2020.127754] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 06/11/2023]
Abstract
In this study, different organic acids-such as citric, acetic, lactic, propionic, and butyric acid-were evaluated to ascertain the optimum leaching solvent for dechlorinating fly ash. Results suggest that the acid type, concentration, and interactions between both parameters contributed significantly to the variations in the efficiency of fly ash dechlorination. Simple main-effect analysis suggested that a higher acid concentration yields better dechlorination efficiency. However, improvements in dechlorination efficiency did not necessarily yield a low chlorine content leaching residue because in a specific acid concentration region, the increased acid concentration may also accelerate the mass reduction rate of the leaching residue. Experimental results also demonstrate that citric and acetic acid yield the highest dechlorination efficiency, followed by propionic and butyric acid. The least dechlorination efficiency of lactic acid could be attributed to the formation of precipitate (i.e. calcium lactate) which might cover the chlorides and reduce the contact area of intimal chlorides with the leaching solvent. Therefore, a specific concentration of organic matter fermentation broth rich in citric and acetic radicals may present itself as an ideal water substitute for fly ash dechlorination.
Collapse
Affiliation(s)
- Xiaona Wang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Menglu Wang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Dezhi Zou
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Chuanfu Wu
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 10083, China.
| | - Teng Li
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Ming Gao
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 10083, China
| | - Shu Liu
- School of Space and Environment, Beihang University, 37 Xueyuan Road, Haidian District, Beijing, 100191, China
| | - Qunhui Wang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 10083, China.
| | - Takayuki Shimaoka
- Department of Urban and Environmental Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| |
Collapse
|
20
|
Xie K, Hu H, Xu S, Chen T, Huang Y, Yang Y, Yang F, Yao H. Fate of heavy metals during molten salts thermal treatment of municipal solid waste incineration fly ashes. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 103:334-341. [PMID: 31923840 DOI: 10.1016/j.wasman.2019.12.047] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 12/09/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
Thermal treatment could effectively realize the detoxification of heavy metals in municipal solid waste incineration (MSWI) fly ash through the approach of removal or stabilization process. To lower the operating temperature and suppress the evaporation of heavy metals, a molten salts (NaCl-CaCl2) thermal treatment method was proposed for the detoxification of heavy metals from MSWI fly ash at a relatively mild condition (600/800 °C). The fate of heavy metals during the heating process and their stabilization properties in the remained ash slag after molten salts thermal treatment were investigated. The results showed that, compared with the traditional thermal treatment, heavy metals were more easily chlorinated by the means of molten salts thermal treatment. The well distributed chloride in molten salts facilitated the direct chlorination of PbO/CdO. Furthermore, Al2O3 in ash enhanced the indirect chlorination of CuO/PbO/CdO, except for ZnO. In contrast, SiO2 showed better performance in promoting the indirect chlorination of heavy metal oxides. Meanwhile, some Zn2+ was precipitated from molten salts as Si/Al-Zn composite oxides through the interactions with ash containing Si/Al oxides. On the other hand, the dissolved heavy metals in molten salts showed a good thermal stability during the thermal treatment. The volatilization fractions of all detected heavy metals were less than 5%. After the molten salts thermal treatment, heavy metals in the ash slag were well stabilized and the amount of heavy metals leached was significantly lower than that from the raw fly ash.
Collapse
Affiliation(s)
- Kang Xie
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hongyun Hu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Sihua Xu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Tongzhou Chen
- Wuhan Research Institute of Materials Protection, Wuhan 430074, China
| | - Yongda Huang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yuhan Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Fu Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hong Yao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| |
Collapse
|