Subhakantadash, Piyush Gupta, I. Mohanty, Laxmidharpanda
Pervious concrete (PC), as sustainable pavement material, has gained a lot of attention as a result of its specific environmental effects. This manuscript analyzes the advancements and state-of-the-art pertinent to PC research and practices. This review focuses on the utilization of various waste components (used as aggregate) in PC, its composition and specifications, mechanical strength and durability, pore properties and clogging behaviour; in-situ applications and the future scope of the material. The unique ability of PC addresses a number of environmental interests ex: ground water recharging, water runoff mitigation, controlled heat island effect, decrease in risk pertaining to flash flooding runoff, noise reduction, etc. The multitudinous benefits of PC paves a way for further investigations to understand the material functionality in a better way and make it a promising sustainable construction material in future.
{"title":"A Multifunctional and Sustainable Pavement Material: Pervious Concrete","authors":"Subhakantadash, Piyush Gupta, I. Mohanty, Laxmidharpanda","doi":"10.5276/jswtm/2022.576","DOIUrl":"https://doi.org/10.5276/jswtm/2022.576","url":null,"abstract":"Pervious concrete (PC), as sustainable pavement material, has gained a lot of attention as a result of its specific environmental effects. This manuscript analyzes the advancements and state-of-the-art pertinent to PC research and practices. This review focuses on the utilization of\u0000 various waste components (used as aggregate) in PC, its composition and specifications, mechanical strength and durability, pore properties and clogging behaviour; in-situ applications and the future scope of the material. The unique ability of PC addresses a number of environmental interests\u0000 ex: ground water recharging, water runoff mitigation, controlled heat island effect, decrease in risk pertaining to flash flooding runoff, noise reduction, etc. The multitudinous benefits of PC paves a way for further investigations to understand the material functionality in a better way\u0000 and make it a promising sustainable construction material in future.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The use of raw resources is increasing due to the continuous increase of world population and rapid industrialization; while natural resources are being depleted day by day. The use of waste or manufactured materials in road construction has significant environmental and economic benefits. In this study, the use of ceramic powder as mineral filler in hot asphalt mix as an alter- native method to traditional crushed stone was investigated. The optimal amount of bitumen was determined using Marshall Mix Design method or using four different amounts of bitumen 4.5%, 5% and 5.5%. With the optimal amount of bitumen, two different types of corroded mineral fillers, ceramic and stone powder with three different filler ratios (4%, 6%, and 8%) were used to prepare asphalt mixture samples. The samples were subjected to Marshall Resistance Test, flow, determination of empty space percentage and percentage of empty space filled with bitumen and the results were compared. Also, to evaluate the type and amount of filler on the performance of bitumen, penetration degree test, softening point and ductility test of pure bitumen and bitumen containing two materials of calcareous filler and ceramic powder with different percentages were performed. The results show that the Marshall and flow strength of mixtures containing calcareous filler is about 5% higher and 12% less than the mixture containing the waste filler, respectively, and with increasing the percentage of filler in asphalt samples, the average degree of penetration and elasticity are about 30% and 4.5%, respectively decreases and softening point increases 7%; These changes are more severe in asphalt samples containing calcareous fillers. In general, it can be concluded that ceramic waste powder can be used in asphalt mixture as a mineral filler to replace crushed rock dust, because the use of this material as filler in road construction is appropriate in terms of economic and environmental factors.
{"title":"The Effect of Using Ceramic Waste Powder as a Filler on the Performance of Bitumen Mastic and Hot Asphalt Mix","authors":"Zohreh Ghafoori Fard, M. Khabiri, P. A. Meybodi","doi":"10.5276/jswtm/2022.507","DOIUrl":"https://doi.org/10.5276/jswtm/2022.507","url":null,"abstract":"The use of raw resources is increasing due to the continuous increase of world population and rapid industrialization; while natural resources are being depleted day by day. The use of waste or manufactured materials in road construction has significant environmental and economic benefits.\u0000 In this study, the use of ceramic powder as mineral filler in hot asphalt mix as an alter- native method to traditional crushed stone was investigated. The optimal amount of bitumen was determined using Marshall Mix Design method or using four different amounts of bitumen 4.5%, 5% and 5.5%.\u0000 With the optimal amount of bitumen, two different types of corroded mineral fillers, ceramic and stone powder with three different filler ratios (4%, 6%, and 8%) were used to prepare asphalt mixture samples. The samples were subjected to Marshall Resistance Test, flow, determination of empty\u0000 space percentage and percentage of empty space filled with bitumen and the results were compared. Also, to evaluate the type and amount of filler on the performance of bitumen, penetration degree test, softening point and ductility test of pure bitumen and bitumen containing two materials\u0000 of calcareous filler and ceramic powder with different percentages were performed. The results show that the Marshall and flow strength of mixtures containing calcareous filler is about 5% higher and 12% less than the mixture containing the waste filler, respectively, and with increasing the\u0000 percentage of filler in asphalt samples, the average degree of penetration and elasticity are about 30% and 4.5%, respectively decreases and softening point increases 7%; These changes are more severe in asphalt samples containing calcareous fillers. In general, it can be concluded that ceramic\u0000 waste powder can be used in asphalt mixture as a mineral filler to replace crushed rock dust, because the use of this material as filler in road construction is appropriate in terms of economic and environmental factors.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47453311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K.L.A.K.T. Liyanage, K. Waidyasekara, B. Mallawaarachchi
The construction industry, being a large industry, generates a massive amount of Construction and Demolition Waste (CDW). Strategies such as the 3R concept (Reduce, Reuse, Recycle) and waste hierarchy are used in the industry for CDW management. However, CDW management is still in its primary stage. The Zero Waste (ZW) concept has the potential to eliminate CDW. Thus, this study aimed to identify how the 3R concept can be used in the construction industry in Sri Lanka to eliminate CDW and achieve ZW. A comprehensive literature survey and a qualitative research approach consisting of eight case studies were used for data collection. Manual content analysis followed by cross-case analysis was used to analyze the data collected through twenty semi-structured interviews. The study identified ways of minimizing wastage of materials by using the reducing and reusing concepts. Although none of the construction sites had recycling machines, recycle strategy was implemented at the sites for waste materials by hiring recyclers. Thus, this study proves the feasibility of achieving ZW through the 3R concept by adopting an effective waste management plan at the initial stages of construction projects.
{"title":"Application of the 3R Concept in the Construction Industry to Achieve Zero Waste—a Sri Lankan Case Study","authors":"K.L.A.K.T. Liyanage, K. Waidyasekara, B. Mallawaarachchi","doi":"10.5276/jswtm/2022.486","DOIUrl":"https://doi.org/10.5276/jswtm/2022.486","url":null,"abstract":"The construction industry, being a large industry, generates a massive amount of Construction and Demolition Waste (CDW). Strategies such as the 3R concept (Reduce, Reuse, Recycle) and waste hierarchy are used in the industry for CDW management. However, CDW management is still in its\u0000 primary stage. The Zero Waste (ZW) concept has the potential to eliminate CDW. Thus, this study aimed to identify how the 3R concept can be used in the construction industry in Sri Lanka to eliminate CDW and achieve ZW. A comprehensive literature survey and a qualitative research approach\u0000 consisting of eight case studies were used for data collection. Manual content analysis followed by cross-case analysis was used to analyze the data collected through twenty semi-structured interviews. The study identified ways of minimizing wastage of materials by using the reducing and reusing\u0000 concepts. Although none of the construction sites had recycling machines, recycle strategy was implemented at the sites for waste materials by hiring recyclers. Thus, this study proves the feasibility of achieving ZW through the 3R concept by adopting an effective waste management plan at\u0000 the initial stages of construction projects.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43260490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Low volume Coal Bottom Ash (CBA) was introduced as a substitute for Portland Cement (PC) and Fine Natural Aggregates (FNA) in concretes that were tested for permeation performance. Carbonation and chloride resistance was measured through accelerated carbonation tests and rapid chloride tests respectively while water penetration was evaluated through capillary water absorption tests for the aforesaid concretes. This paper particularly investigates the effectiveness of CBA in regard of permeation behaviour in concrete. The experimental investigation inferred that as level of CBA increases, the resistance towards carbonation, chloride penetration and water penetration decreases to some extent for low volume alterations while higher decrements were observed for higher replacements. The joint replacement of CBA as PC and FNA for the level of 10% and 25% respectively resulted in satisfactory behaviour comparing to control concrete demonstrating the efficacy and potential of CBA for its successful application in concrete.
{"title":"Permeation Behaviour of Coal Bottom Ash Concretes","authors":"Navdeep Singh, A. Bhardwaj, Shehnazdeep","doi":"10.5276/jswtm/2022.353","DOIUrl":"https://doi.org/10.5276/jswtm/2022.353","url":null,"abstract":"Low volume Coal Bottom Ash (CBA) was introduced as a substitute for Portland Cement (PC) and Fine Natural Aggregates (FNA) in concretes that were tested for permeation performance. Carbonation and chloride resistance was measured through accelerated carbonation tests and rapid chloride\u0000 tests respectively while water penetration was evaluated through capillary water absorption tests for the aforesaid concretes. This paper particularly investigates the effectiveness of CBA in regard of permeation behaviour in concrete. The experimental investigation inferred that as level\u0000 of CBA increases, the resistance towards carbonation, chloride penetration and water penetration decreases to some extent for low volume alterations while higher decrements were observed for higher replacements. The joint replacement of CBA as PC and FNA for the level of 10% and 25% respectively\u0000 resulted in satisfactory behaviour comparing to control concrete demonstrating the efficacy and potential of CBA for its successful application in concrete.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49577550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Separation of household waste at the source plays an important role in the sustainable management of MSW. In the present study, SWOT analysis, which is one of the strongest strategic planning techniques, was used to determine the effective factors and the most appropriate strategies for household waste separation in Ahvaz, Iran. Data were collected from 20 experts and 523 households using questionnaires. The overall priority scores of the internal and external factor evaluation matrices were 1.579 and 2.736, respectively, which indicates the unfavorable conditions of internal factors and relatively favorable conditions of external factors in the separation of household waste at the source. SWOT analysis showed that the competitive strategy is the most appropriate strategy for household waste separation at the source in Ahvaz, which is based on the maximum exploitation of opportunities with simultaneous reduction of weaknesses. The potential of energy saving as a result of recycling materials and electricity generation from municipal solid waste by anaerobic digestion process in Ahvaz was obtained at about 176 and 53 GWh/year, respectively. The results showed that SWOT analysis can be a promising method to determine the strengths, weaknesses, opportunities, and threats of separation of household waste at the source and provide the most appropriate strategy for their segregation.
{"title":"Strategic Analysis of Household Waste Separation at Source Using Swot Matrix, a Case Study: Ahvaz, Iran","authors":"Behrouz Najarneghad, A. Asakereh, H. Bahrami","doi":"10.5276/jswtm/2022.432","DOIUrl":"https://doi.org/10.5276/jswtm/2022.432","url":null,"abstract":"Separation of household waste at the source plays an important role in the sustainable management of MSW. In the present study, SWOT analysis, which is one of the strongest strategic planning techniques, was used to determine the effective factors and the most appropriate strategies\u0000 for household waste separation in Ahvaz, Iran. Data were collected from 20 experts and 523 households using questionnaires. The overall priority scores of the internal and external factor evaluation matrices were 1.579 and 2.736, respectively, which indicates the unfavorable conditions of\u0000 internal factors and relatively favorable conditions of external factors in the separation of household waste at the source. SWOT analysis showed that the competitive strategy is the most appropriate strategy for household waste separation at the source in Ahvaz, which is based on the maximum\u0000 exploitation of opportunities with simultaneous reduction of weaknesses. The potential of energy saving as a result of recycling materials and electricity generation from municipal solid waste by anaerobic digestion process in Ahvaz was obtained at about 176 and 53 GWh/year, respectively.\u0000 The results showed that SWOT analysis can be a promising method to determine the strengths, weaknesses, opportunities, and threats of separation of household waste at the source and provide the most appropriate strategy for their segregation.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45961325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For composting of garden waste, the selection of reactor is an important factor for efficient degradation. The present study evaluates working performance of rotary drum reactor (RDR) and aerated in-vessel (AIV) for composting of garden waste. 500 kg garden waste was mixed with 50 kg cow-dung slurry and 10 kg compost and fed into both the reactors for 45 days composting period. The reactors vary in their system configuration, shape and orientation, blade design, rate of aeration, odour control, leachate production and energy requirements. Rotary drum was rotated daily six times in clockwise and anti-clockwise direction and AIV was rotated daily for 3-5 minutes using motor. Rise in temperature started within 24 hours of composting and reached 65°C (RDR) and 59°C (AIV) on second day itself and thermophilic phase continued for 5 (RDR) and 7 (AIV) days. Moisture content reduction after composting period was 15.25 and 18.45 %, C/N ratio was 16.14 and 13.33, total volatile solids reduction was 23.74 and 29.78 % and CO2 evolution rate was 6.18 and 4.14 mg/g VS/day in RDR and AIV respectively. Reduction of hemicellulose, cellulose, and lignin was more in AIV as compared to RDR. The percentage reduction of acid insoluble lignin was 36.10 and 29.01 % and the percentage reduction of acid soluble lignin was 48.85 and 43.3% in in AIV and RDR respectively. AIV gave better performance for composting of garden waste due to its blade design and structural configuration. The novelty of the present study lies in its approach to empower communities to select best alternative as per their waste generation, budget available, land and labour requirements and behaviour of citizens towards waste.
{"title":"Disposal of Garden Waste by Analysing Selected Physico-Chemical and Biological Parameters Using In-Vessel Composting at a Community Level","authors":"S. Mishra, K. Yadav","doi":"10.5276/jswtm/2022.362","DOIUrl":"https://doi.org/10.5276/jswtm/2022.362","url":null,"abstract":"For composting of garden waste, the selection of reactor is an important factor for efficient degradation. The present study evaluates working performance of rotary drum reactor (RDR) and aerated in-vessel (AIV) for composting of garden waste. 500 kg garden waste was mixed with 50 kg\u0000 cow-dung slurry and 10 kg compost and fed into both the reactors for 45 days composting period. The reactors vary in their system configuration, shape and orientation, blade design, rate of aeration, odour control, leachate production and energy requirements. Rotary drum was rotated daily\u0000 six times in clockwise and anti-clockwise direction and AIV was rotated daily for 3-5 minutes using motor. Rise in temperature started within 24 hours of composting and reached 65°C (RDR) and 59°C (AIV) on second day itself and thermophilic phase continued for 5 (RDR) and 7 (AIV) days.\u0000 Moisture content reduction after composting period was 15.25 and 18.45 %, C/N ratio was 16.14 and 13.33, total volatile solids reduction was 23.74 and 29.78 % and CO2 evolution rate was 6.18 and 4.14 mg/g VS/day in RDR and AIV respectively. Reduction of hemicellulose, cellulose,\u0000 and lignin was more in AIV as compared to RDR. The percentage reduction of acid insoluble lignin was 36.10 and 29.01 % and the percentage reduction of acid soluble lignin was 48.85 and 43.3% in in AIV and RDR respectively. AIV gave better performance for composting of garden waste due to its\u0000 blade design and structural configuration. The novelty of the present study lies in its approach to empower communities to select best alternative as per their waste generation, budget available, land and labour requirements and behaviour of citizens towards waste.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47699949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. A. Colvero, J. Ramalho, Ana Paula Duarte Gomes, L. Tarelho, Manuel Arlindo Amador de Matos
In Brazil, there are densely populated metropolitan regions, motivated by a great migratory flux in the 1970s. One of the consequences is the increased per capita municipal solid waste generation, which has been constantly associated with deficient waste management. That is the case of 19 municipalities from Goiás State that inappropriately disposed of 73% of the produced household waste. According to Law No. 12,305/2010, these municipalities must implement a waste management facility with MSW recovery and landfill diversions to minimize environmental impacts. Furthermore, a specific life cycle assessment tool was used to conduct an environmental assessment of different alternatives for a shared waste management system among the metropolitan municipalities. The results have shown that the current scenario has the largest environmental impacts in seven of 12 assessed impact categories, among them the global warming potential. In this scenario, final waste disposal has the greatest environmental impact, particularly due to unlicensed landfills. Conversely, anaerobic digestion with greater landfill diversions generates the lowest emissions in eight of 12 impact categories. This demonstrates the importance of anaerobic digestion and the compliance of the diversion targets established by the Brazilian National Plan for Solid Waste Management.
{"title":"Life Cycle Assessment of Shared Municipal Solid Waste Management Facilities in a Metropolitan Region","authors":"D. A. Colvero, J. Ramalho, Ana Paula Duarte Gomes, L. Tarelho, Manuel Arlindo Amador de Matos","doi":"10.5276/jswtm/2022.329","DOIUrl":"https://doi.org/10.5276/jswtm/2022.329","url":null,"abstract":"In Brazil, there are densely populated metropolitan regions, motivated by a great migratory flux in the 1970s. One of the consequences is the increased per capita municipal solid waste generation, which has been constantly associated with deficient waste management. That is the\u0000 case of 19 municipalities from Goiás State that inappropriately disposed of 73% of the produced household waste. According to Law No. 12,305/2010, these municipalities must implement a waste management facility with MSW recovery and landfill diversions to minimize environmental impacts.\u0000 Furthermore, a specific life cycle assessment tool was used to conduct an environmental assessment of different alternatives for a shared waste management system among the metropolitan municipalities. The results have shown that the current scenario has the largest environmental impacts in\u0000 seven of 12 assessed impact categories, among them the global warming potential. In this scenario, final waste disposal has the greatest environmental impact, particularly due to unlicensed landfills. Conversely, anaerobic digestion with greater landfill diversions generates the lowest emissions\u0000 in eight of 12 impact categories. This demonstrates the importance of anaerobic digestion and the compliance of the diversion targets established by the Brazilian National Plan for Solid Waste Management.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45661448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Ech-Chayeb, N. Auajjar, S. Hamama, A. Elmniai, E. Hicham, B. Attarassi
The present work aims to study the waste management of infectious hazardous waste from two local hospitals in Morocco: Idrissi hospital of Kenitra and Ibn Baja hospital of Taza. This is a descriptive, exploratory, and cross-sectional study conducted in five departments: intensive care, maternity, emergency, dialysis, and medicine running from June to November 2018. The questionnaires were conducted on 160 health workers. It is remarked that, among 160 questionnaires distributed, 127 answers were obtained (response rate of 79.3%). During the six months of the study, 1778 observations were made. At the level of different care units, the results show that the WHAIR sorting was inadequate in 56% of the sections and the use of the color coding system was effective in 80% of the ones. The containers of the sharps collection were available in 80% of the suites and the transportation inside the hospital was done manually in 60% of cases. Approximately, 65.8% of the employees have not received any training and 90% believe that the outreach work is insufficient.
{"title":"Sustainable Management and Environment of the Hospital Wastes: A Comparative Study of Two Public Hospitals in Morocco","authors":"K. Ech-Chayeb, N. Auajjar, S. Hamama, A. Elmniai, E. Hicham, B. Attarassi","doi":"10.5276/jswtm/2022.465","DOIUrl":"https://doi.org/10.5276/jswtm/2022.465","url":null,"abstract":"The present work aims to study the waste management of infectious hazardous waste from two local hospitals in Morocco: Idrissi hospital of Kenitra and Ibn Baja hospital of Taza. This is a descriptive, exploratory, and cross-sectional study conducted in five departments: intensive care,\u0000 maternity, emergency, dialysis, and medicine running from June to November 2018. The questionnaires were conducted on 160 health workers. It is remarked that, among 160 questionnaires distributed, 127 answers were obtained (response rate of 79.3%). During the six months of the study, 1778\u0000 observations were made. At the level of different care units, the results show that the WHAIR sorting was inadequate in 56% of the sections and the use of the color coding system was effective in 80% of the ones. The containers of the sharps collection were available in 80% of the suites and\u0000 the transportation inside the hospital was done manually in 60% of cases. Approximately, 65.8% of the employees have not received any training and 90% believe that the outreach work is insufficient.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48448891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Daniel Pinto Fernandes, J. Cosme, J. L. Duarte, L. Meili, G. Fernandes
For each ton of steel produced, approximately 120 kg of steel slag are generated in the BOF (Basic Oxygen Furnace) process. In general, the recently produced steel aggregates have a volumetric expansion that leads the material to fragmentation and subsequent fines production. Such a result of this expansion, the use of slag in paving must be done in terms of processes for the free lime treatment. The main objective of this work is to evaluate the chemical stabilization of the unstable oxides using of steel melting aggregate in the liquid phase with the coke refractory, another residue within the steel manufacturing in integrated plants. XRD, EDS, X-ray fluorescence, SEM and textural analysis were performed to investigate the surface and the chemical constitution of the samples. The results obtained showed a significant reduction in the free lime content from stabilized material by the proposed methodology, enabling its uses in railway pavement. In addition, it was possible to conclude that the method fitted the treated sample in the regulamentation standardized limits with no indication of harmful leaching to the environment.
{"title":"Chemical Stabilization of Bof Slag for Reuse in Railway Pavement: Physical-Chemical Characterization, Mechanical and Leaching Tests","authors":"Daniel Pinto Fernandes, J. Cosme, J. L. Duarte, L. Meili, G. Fernandes","doi":"10.5276/jswtm/2022.389","DOIUrl":"https://doi.org/10.5276/jswtm/2022.389","url":null,"abstract":"For each ton of steel produced, approximately 120 kg of steel slag are generated in the BOF (Basic Oxygen Furnace) process. In general, the recently produced steel aggregates have a volumetric expansion that leads the material to fragmentation and subsequent fines production. Such a\u0000 result of this expansion, the use of slag in paving must be done in terms of processes for the free lime treatment. The main objective of this work is to evaluate the chemical stabilization of the unstable oxides using of steel melting aggregate in the liquid phase with the coke refractory,\u0000 another residue within the steel manufacturing in integrated plants. XRD, EDS, X-ray fluorescence, SEM and textural analysis were performed to investigate the surface and the chemical constitution of the samples. The results obtained showed a significant reduction in the free lime content\u0000 from stabilized material by the proposed methodology, enabling its uses in railway pavement. In addition, it was possible to conclude that the method fitted the treated sample in the regulamentation standardized limits with no indication of harmful leaching to the environment.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41728788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Feroz Shaikh, Mohini Sandbhor, S. Choubey, A. Gunjal
The release of heavy metals from paint, electroplating, mining industries, etc. is a serious concern. Industrial effluents contain toxic heavy metals such as zinc, cadmium, chromium, lead, nickel, arsenic, etc. The sequestration of heavy metals by chemical processes is costly, time-consuming and causes environmental pollution. The use of microorganisms, example bacteria, actinobacteria, fungi, algae and yeasts for the sequestration of heavy metals is very eco-friendly, economical and fast. The work presented here describes the sequestration of cadmium and chromium from industrial effluent by bacteria Pseudomonas and Enterobacter sp. and fungi Aspergillus and Trichoderma sp. The industrial effluent was collected from Pimpri-Chinchwad, Pune, Maharashtra, India. The sequestration of Cd and Cr was less by Pseudomonas sp. which was 0.44 and 0.27 mg g-1 with biomass conc. (0.5 g). The sequestration of Cd and Cr byTrichoderma sp. was 0.51 and 0.36 mg g-1 respectively with biomass conc. (0.5 g). The biosorption is a 'green technology' for the sequestration of heavy metals from industrial effluents, waste water, and other contaminants.
{"title":"Biosorption - A Green Approach for the Sequestration of Cadmium and Chromium from Contaminated Water","authors":"Feroz Shaikh, Mohini Sandbhor, S. Choubey, A. Gunjal","doi":"10.5276/jswtm/2022.427","DOIUrl":"https://doi.org/10.5276/jswtm/2022.427","url":null,"abstract":"The release of heavy metals from paint, electroplating, mining industries, etc. is a serious concern. Industrial effluents contain toxic heavy metals such as zinc, cadmium, chromium, lead, nickel, arsenic, etc. The sequestration of heavy metals by chemical processes is costly, time-consuming\u0000 and causes environmental pollution. The use of microorganisms, example bacteria, actinobacteria, fungi, algae and yeasts for the sequestration of heavy metals is very eco-friendly, economical and fast. The work presented here describes the sequestration of cadmium and chromium from industrial\u0000 effluent by bacteria Pseudomonas and Enterobacter sp. and fungi Aspergillus and Trichoderma sp. The industrial effluent was collected from Pimpri-Chinchwad, Pune, Maharashtra, India. The sequestration of Cd and Cr was less by Pseudomonas sp. which was 0.44\u0000 and 0.27 mg g-1 with biomass conc. (0.5 g). The sequestration of Cd and Cr byTrichoderma sp. was 0.51 and 0.36 mg g-1 respectively with biomass conc. (0.5 g). The biosorption is a 'green technology' for the sequestration of heavy metals from industrial effluents,\u0000 waste water, and other contaminants.","PeriodicalId":35783,"journal":{"name":"Journal of Solid Waste Technology and Management","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49327107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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