Cleaner Engineering and Technology最新文献

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Performance of seawater-derived Mg(OH)2 as a sustainable coating solution for hydrogen sulfide-induced corrosion mitigation in concrete pipes 海水衍生的Mg(OH)2作为混凝土管道硫化氢腐蚀可持续涂层溶液的性能
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2024.100872
Janelle Patricia S. Moa, Bea Angela C. Gaw, John Louis O. Co, Kyle Anderson C. Coo, Kenneth Jae T. Elevado, Cheryl Lyne C. Roxas
{"title":"Performance of seawater-derived Mg(OH)2 as a sustainable coating solution for hydrogen sulfide-induced corrosion mitigation in concrete pipes","authors":"Janelle Patricia S. Moa,&nbsp;Bea Angela C. Gaw,&nbsp;John Louis O. Co,&nbsp;Kyle Anderson C. Coo,&nbsp;Kenneth Jae T. Elevado,&nbsp;Cheryl Lyne C. Roxas","doi":"10.1016/j.clet.2024.100872","DOIUrl":"10.1016/j.clet.2024.100872","url":null,"abstract":"<div><div>In the Philippines, concrete pipe systems are critical for wastewater management, flood control, and irrigation, accounting for approximately 70% of all installations. These systems often operate in anaerobic environments, making them vulnerable to corrosion from hydrogen sulfide. While commonly available methods like polyurethane and epoxy tar coal pitch are effective, modern studies have revealed that such products detrimentally affect the environment. As such, this study investigates the feasibility of a sustainable concrete surface coating using seawater-derived magnesium hydroxide (Mg(OH)<sub>2</sub>) as an alternative to commercially available options. Six distinct coating ratios were prepared with varying proportions of seawater (SW)-derived and commercially available (CA) Mg(OH)₂: 0% SW - 100% CA, 25% SW - 75% CA, 50% SW - 50% CA, 75% SW - 25% CA, and 100% SW - 0% CA, with four replicates for each mixture. The specimens were subjected to a 4M sulfuric acid solution for four days to assess compressive strength, weight loss, surface pH, and surface roughness. A life cycle assessment was also conducted for the different coating ratios, and response surface methodology (RSM) was employed to determine the optimal coating ratio. Results indicated that samples with pure Mg(OH)<sub>2</sub> coatings exhibited the highest weight losses, while increased proportions of the commercial coating resulted in progressively lower weight losses. This trend was also reflected in the average post-exposure pH, compressive strength, and surface roughness, with the best performance observed in coatings composed of pure commercially available Mg(OH)₂. Although the 100% SW - 0% CA specimens did not meet the required pH and compressive strength standards, other coating ratios could satisfy the acceptance criteria. Notably, a significant difference of 3,092,680 mPt was observed between pure commercially available and seawater-derived Mg(OH)₂ coatings when scaled on a flood control project case study. Based on the results, RSM analysis suggested an optimal coating ratio of 40% SW - 60% CA Mg(OH)<sub>2</sub>. This study highlights the potential of seawater-derived Mg(OH)<sub>2</sub> as a sustainable alternative for mitigating hydrogen sulfide-induced corrosion in concrete pipe systems.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100872"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal and economic evaluation of replacing pulverized coal with torrefied biomass in a small industrial burner in Thailand using computational fluid dynamics 利用计算流体动力学对泰国小型工业燃烧器中用碳化生物质代替煤粉的热学和经济评价
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2025.100898
Rachapat Chaiyo, Jakrapop Wongwiwat, Yanin Sukjai
{"title":"Thermal and economic evaluation of replacing pulverized coal with torrefied biomass in a small industrial burner in Thailand using computational fluid dynamics","authors":"Rachapat Chaiyo,&nbsp;Jakrapop Wongwiwat,&nbsp;Yanin Sukjai","doi":"10.1016/j.clet.2025.100898","DOIUrl":"10.1016/j.clet.2025.100898","url":null,"abstract":"<div><div>In response to the global warming crisis, the use of carbon-neutral biomass as a substitute for coal has gained significant attention due to its comparable combustion properties. This approach allows for minimal modifications to existing fuel systems. However, biomass has limitations, including its fibrous structure, which complicates grinding, and high moisture content, leading to lower power density and increased soot emissions. To overcome these challenges, torrefaction, a process involving the heating of raw biomass to around 200–300 °C, has emerged as a promising solution. This method improves the fuel's quality, reducing its moisture content and enhancing grindability, though it requires heat energy and raw material compensation for mass loss. This study employs computational fluid dynamics (CFD) modeling using ANSYS Fluent to analyze the combustion behavior of torrefied biomass produced under varying severity conditions. The results indicate that intensifying the torrefaction process increases combustion temperatures due to the fuel's higher calorific value and reduced moisture. Additionally, improved grinding capabilities reduce particle size, further enhancing combustion. Compared to conventional biomass, torrefied biomass shows a 28% increase in heat energy, rising from 220 to 279 kW, surpassing coal's 273 kW. Carbon monoxide emissions are significantly reduced by 93%, from 1044–72 kg/MWh, while coal emissions are 20 kg/MWh. However, nitrogen oxide emissions increased by 217%, from 0.17 to 0.54 kg/MWh, though still lower than coal's 0.72 kg/MWh. A cost analysis reveals that torrefaction conditions yielding a solid yield of 0.7 offers the lowest energy cost, approximately 114 Baht/GJ, a 14% reduction compared to conventional biomass and 37% lower than coal.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100898"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient and eco-friendly treatment of municipal solid waste incineration fly ash and municipal sludge for alkali activated material 高效环保处理城市生活垃圾焚烧飞灰和城市污泥为碱活性物质
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2024.100867
Zengqing Sun , Xiaoyu Li , Min Gan , Zhiyun Ji , Xiaohui Fan , Qingyu Tang , Jinxin Xing
{"title":"Efficient and eco-friendly treatment of municipal solid waste incineration fly ash and municipal sludge for alkali activated material","authors":"Zengqing Sun ,&nbsp;Xiaoyu Li ,&nbsp;Min Gan ,&nbsp;Zhiyun Ji ,&nbsp;Xiaohui Fan ,&nbsp;Qingyu Tang ,&nbsp;Jinxin Xing","doi":"10.1016/j.clet.2024.100867","DOIUrl":"10.1016/j.clet.2024.100867","url":null,"abstract":"<div><div>Concern is arising for the effective treatment and utilization of municipal solid waste incineration (MSWI FA) and municipal sludge (MS). A synergistic thermal treatment method that can energy efficiently and eco-friendly converting MSWI FA and MS into precursor for alkali activated materials (AAMs) synthesis has been developed in our laboratory. This paper delves into the mechanisms of synergistic thermal treatment and alkali activation. The results indicate that the synergistic processing of MSWI FA and MS can effectively reduce the temperature required for thermal treatment. During the thermal treatment process, treatment above 1200 °C leads to the significant formation of amorphous phases, which markedly aids in the strength development of AAMs. The strength of the AAMs is 42.63–48.51 MPa. Additionally, the environmental compatibility of the obtained AAMs was studied, with the toxic equivalent quantity of dioxins reduced to 0.76–1.3 ng TEQ/kg, and the leaching rates of Ni, Cr, Cu, Pb, Zn, Mn, Ba and Cd significantly below the regulatory limits in China. The findings from this work provide theoretical and practical guidance for the efficient, secure, and value-added treatment of MSWI FA and MS.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100867"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective zinc recovery from spent alkaline batteries via multistage leaching with ammonium salts 用铵盐多级浸出法回收废旧碱性电池中的选择性锌
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2024.100863
Noelia Muñoz García , Joel Gutierrez Martinez , José Luis Valverde , Beatriz Delgado Cano , Jacques Huot , Michèle Heitz , Antonio Avalos Ramirez
{"title":"Selective zinc recovery from spent alkaline batteries via multistage leaching with ammonium salts","authors":"Noelia Muñoz García ,&nbsp;Joel Gutierrez Martinez ,&nbsp;José Luis Valverde ,&nbsp;Beatriz Delgado Cano ,&nbsp;Jacques Huot ,&nbsp;Michèle Heitz ,&nbsp;Antonio Avalos Ramirez","doi":"10.1016/j.clet.2024.100863","DOIUrl":"10.1016/j.clet.2024.100863","url":null,"abstract":"<div><div>The recycling of metals from spent alkaline batteries is essential for their proper management and for promoting sustainable battery consumption. Hydrometallurgical recycling techniques, such as leaching, are becoming important in batteries recycling. In this study, Zn has been selectively recovered from the black mass (BM) of spent alkaline batteries via chelating leaching using ammonium salts as chelating agents in single and multistage leaching units. The effect of leaching agent concentration, temperature, solid/liquid (S/L) ratio, a neutral leaching pretreatment and addition of ammonium hydroxide (NH<sub>4</sub>OH) to the leaching solution on the selective Zn extraction was studied. Results of single-stage leaching revealed a maximum Zn extraction efficiency of 69.3 ± 0.4 wt % using a 2M ammonium carbonate ((NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>) solution at 25 °C and S/L ratio of 1/10 (g of BM/mL of solution). The addition of NH<sub>4</sub>OH 1M increased Zn extraction to 79.0 ± 1.9 wt %. These single leaching conditions were used to test three multistage leaching systems: solid-flowing in series, liquid-flowing in series and solid-liquid countercurrent. The recovery efficiency was maintained and sometimes it was improved in multistep configurations, reaching a maximum recovery efficiency of nearly 90 wt%. Additionally, cumulative zinc extraction across the multistage leaching setups was as follows: 145.6 g Zn/kg BM in the 3-unit-solid-flowing in series, 433.5 g Zn/kg BM in the 4-unit-liquid-flowing in series, and 132.46 g Zn/kg BM in two-unit countercurrent leaching. These concentrations were obtained using a raw BM containing 240.9 g Zn/kg BM. These results show that zinc can be selectively extracted from matrices containing other metals, allowing the development of efficient and cost-effective methods for recycling resources from spent batteries.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100863"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Process and technology solutions for improving the energy efficiency and the sustainability of the iron ores reduction with Blast Furnaces utilizing synthesis gas 利用合成气的高炉提高能源效率和铁矿石还原的可持续性的工艺和技术解决方案
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2024.100860
S. Andreola , F. Barbetti , L.E. Basini , G. Iaquaniello , A. Salladini
{"title":"Process and technology solutions for improving the energy efficiency and the sustainability of the iron ores reduction with Blast Furnaces utilizing synthesis gas","authors":"S. Andreola ,&nbsp;F. Barbetti ,&nbsp;L.E. Basini ,&nbsp;G. Iaquaniello ,&nbsp;A. Salladini","doi":"10.1016/j.clet.2024.100860","DOIUrl":"10.1016/j.clet.2024.100860","url":null,"abstract":"<div><div>This work examined solutions for improving the environmental impact and the economics of the iron ore reduction processes using Blast Furnaces and Basic Oxygen Furnaces. The improvements followed from the utilization of a syngas produced with Short Contact Time-Catalytic Partial Oxidation. The case studies considered a hot metal production of 2.35 MTPY and the effects of injecting synthesis gas (55,000 Nm3/h) on the reduction of coke utilization, CO<sub>2</sub> and pollutants emissions. In addition, an economic analysis estimated the monetary value of Carbon Dioxide and air pollutant emissions avoidance. Cases in which syngas was produced by utilizing i) Natural Gas, ii) biogas and iii) mixtures of Natural Gas with Blast Furnace Gas and Coke Oven Gas were examined. Process schemes including electrolytic technologies were also considered. In these last cases, the Oxygen was utilized in the syngas production while the Hydrogen was added afterwards to the produced syngas. The results showed that the utilization of syngas allowed a reduction of coke consumption comprised between 13.4 and 39.4 kg/ton Hot Metal depending on the reactor's feedstock and process conditions. The economics also included sensitivity analysis for identifying the most attractive scenarios for pursuing the application of the examined solutions.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100860"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Removal of heavy metals in industrial wastewater using adsorption technology: Efficiency and influencing factors 吸附法去除工业废水中的重金属:效率及影响因素
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2025.100879
Fernando García Ávila , Janneth Cabrera-Sumba , Sandra Valdez-Pilataxi , Jessica Villalta-Chungata , Lorgio Valdiviezo-Gonzales , Cecilia Alegria-Arnedo
{"title":"Removal of heavy metals in industrial wastewater using adsorption technology: Efficiency and influencing factors","authors":"Fernando García Ávila ,&nbsp;Janneth Cabrera-Sumba ,&nbsp;Sandra Valdez-Pilataxi ,&nbsp;Jessica Villalta-Chungata ,&nbsp;Lorgio Valdiviezo-Gonzales ,&nbsp;Cecilia Alegria-Arnedo","doi":"10.1016/j.clet.2025.100879","DOIUrl":"10.1016/j.clet.2025.100879","url":null,"abstract":"<div><div>Most industries are responsible for environmental pollution because their wastewater contains heavy metals that are hazardous. These metals tend to persist indefinitely in the environment, compromising not only human health but also the well-being of ecosystems. The objective of this study was to analyze the adsorption technology for removing heavy metals in industrial wastewater, evaluating influencing factors, adsorbent materials, applied isotherms and their advantages, through a systematic review of the scientific literature of the last 10 years. To conduct this research, the Scopus digital database was consulted. The search was conducted using a systematic review methodology and the PICO framework to identify, analyze, and interpret data on adsorption technology, factors influencing adsorption, the efficiency of different materials used as adsorbents, and the advantages and disadvantages of adsorption isotherms. To filter the information, the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement were followed, which allowed the articles to be selected to answer the research questions posed in this study. Based on the results, it was found that the factors influencing the adsorption of heavy metals include pH (range of 3–9), contact time (range of 10–14,400 min), adsorbent dosage (0.011–20 g/L), temperature (25–30 °C), particle size, and agitation speed (100–800 ppm). Among the most efficient adsorbents are acacia cellulose lignin with 99.8% Cr, bentonite clay with 99% Cu, 96% Cd, and 99% Pb, modified sugarcane bagasse with 96.9% Cu, and activated carbon with 82.8% Cr at pH 3. The least efficient adsorbents are natural moss (54.5% Cr) and biochar from corn husks (20% Cr). The Freundlich isotherm model is the most used, and it can vary depending on the type of adsorbent, the correlation coefficient fit, and the type of heavy metal being treated. Finally, the advantages and limitations of some adsorbents are presented, primarily highlighting their low costs, reusability, and the sustainability they can offer in reducing environmental pollution.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100879"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Factors influencing the use of treated wastewater for irrigation in the agricultural sector: Evidence from Iran 影响农业部门将处理过的废水用于灌溉的因素:来自伊朗的证据
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2025.100901
Moslem Savari , Mohammad Shokati Amghani , Ashraf Malekian
{"title":"Factors influencing the use of treated wastewater for irrigation in the agricultural sector: Evidence from Iran","authors":"Moslem Savari ,&nbsp;Mohammad Shokati Amghani ,&nbsp;Ashraf Malekian","doi":"10.1016/j.clet.2025.100901","DOIUrl":"10.1016/j.clet.2025.100901","url":null,"abstract":"<div><div>In recent years, excessive use of freshwater and untreated wastewater for agricultural irrigation has exerted increasing pressure on environmental and natural resources. Hence, this study aimed to identify the influencing factors on Iranian farmers' intention to use Treated Wastewater (TWW) for irrigation in the agricultural sector. The research framework combines two theories: the Theory of Planned Behavior (TPB) and the Technology Acceptance Model (TAM). The study employed a survey method using a questionnaire and structural equation modeling (SEM) for analysis. The statistical population consisted of all irrigated farmers in Tehran Province, the capital of Iran. The results indicate that the integration of TPB and TAM can provide new insights for policymakers aiming to encourage farmers to utilize TWW for agricultural irrigation, thereby promoting environmental sustainability and healthy crop production. The developed framework is capable of explaining 68.1% of the variance in farmers' intention to use TWW. Additionally, the findings reveal that the research variables explain 59.8% and 31% of the variance in the variables perceived usefulness and farmers' attitudes, respectively. In this study, PBC and SN play the most significant roles in the adoption of TWW among farmers. Consequently, policymakers can promote safe practices in the agricultural environment by emphasizing these factors, thereby reducing the excessive consumption of freshwater resources.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100901"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance, thermodynamic modelling, and global warming potential of low sodium-activated artificial granulated slag substituted with quartz and limestone fillers 用石英和石灰石填料替代低钠活化人工渣粒的性能、热力学模型和全球变暖潜势
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2024.100861
Hamdy A. Abdel-Gawwad , Tamino Hirsch , Raoul Mancke , Rafia Firdous , Christian Lehmann , Anja Buchwald , Dietmar Stephan
{"title":"Performance, thermodynamic modelling, and global warming potential of low sodium-activated artificial granulated slag substituted with quartz and limestone fillers","authors":"Hamdy A. Abdel-Gawwad ,&nbsp;Tamino Hirsch ,&nbsp;Raoul Mancke ,&nbsp;Rafia Firdous ,&nbsp;Christian Lehmann ,&nbsp;Anja Buchwald ,&nbsp;Dietmar Stephan","doi":"10.1016/j.clet.2024.100861","DOIUrl":"10.1016/j.clet.2024.100861","url":null,"abstract":"<div><div>Commercialization of alkali-activated slag faces, among others, two major hurdles: limited availability of blast-furnace slag and the high cost of alkaline activators. Furthermore, the corrosive nature of the alkaline solution, the energy-intensive production, and the resulting CO<sub>2</sub> emissions significantly impede widespread adoption. This research presents a novel approach to overcome these challenges and pave the way for commercially viable alkali-activated binders. We propose utilizing highly reactive artificial granulated slag (AS) synthesized from the treatment of slag generated during ferrochrome alloy production. This AS serves as the primary reactive precursor within the alkali-activated system. Activation of AS with a low Na<sub>2</sub>O concentration (3 wt%) yields a hardened material boasting a remarkable 90 d compressive strength of approx. 105 MPa. Capitalizing on the exceptional reactivity of AS, we explored its partial replacement with readily available and cost-effective quartz and limestone powders. Despite the lower reactivity of these fillers compared to AS, the resulting hardened materials containing 50 vol% filler still achieve an impressive 90 d compressive strength of 75 MPa, even with a low Na<sub>2</sub>O content of 2 wt%. Phase composition determined via thermodynamic modelling closely aligns with microanalyses and the observed compressive strength. Life cycle assessment (LCA) conclusively demonstrates that the synergistic combination of highly reactive AS, fillers, and low Na<sub>2</sub>O concentration offers a promising route for producing alkali-activated binders with significantly lower energy demand and CO<sub>2</sub>–eqv emissions (up to 67% reduction).</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100861"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainable carbon nanomaterials solutions: Facile synthesis from heavy metal-rich water hyacinth using CVD method 可持续碳纳米材料的解决方案:利用CVD法从富含重金属的水葫芦中简单合成
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2024.100862
Suparat Sasrimuang , Apichart Artnaseaw , Oranat Chuchuen , Chaiyapat Kruehong
{"title":"Sustainable carbon nanomaterials solutions: Facile synthesis from heavy metal-rich water hyacinth using CVD method","authors":"Suparat Sasrimuang ,&nbsp;Apichart Artnaseaw ,&nbsp;Oranat Chuchuen ,&nbsp;Chaiyapat Kruehong","doi":"10.1016/j.clet.2024.100862","DOIUrl":"10.1016/j.clet.2024.100862","url":null,"abstract":"<div><div>A sustainable method for synthesizing carbon nanomaterials (CNMs) using water hyacinth, which accumulates heavy metals from contaminated water, has been developed. This approach eliminates the need for expensive external catalysts. CNMs were synthesized from the roots of water hyacinth cultured in iron-rich artificial wastewater for one week, compared to control plants grown under standard conditions. After treatment, the plants were harvested, and their phytoremediation efficiency was assessed using AAS. Results showed rhizofiltration as the primary mechanism in the roots. The roots were then used as raw material for CNM synthesis via a catalyst-free chemical vapor deposition process at 650 °C, with acetylene as the carbon source. Characterization using SEM, TEM, XRD, Raman spectroscopy, and TGA revealed that the CNMs mainly consisted of bamboo-like carbon nanotubes and carbon nanofibers. The iron content in the treated roots acted as a catalyst for CNM formation, while Si and Al in the control sample facilitated nucleation. Raman spectroscopy confirmed a high degree of crystallization in both samples.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100862"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extending the handprint approach for the assessment of circular solutions to study the potential positive climate impacts of workplace-as-a-service system 推广手印方法评估循环方案,以研究工作场所即服务系统对气候的潜在积极影响
IF 5.3
Cleaner Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.clet.2025.100897
Mikko Ropo , Kaisa Grönman , Laura Lakanen , Katri Behm , Risto Soukka
{"title":"Extending the handprint approach for the assessment of circular solutions to study the potential positive climate impacts of workplace-as-a-service system","authors":"Mikko Ropo ,&nbsp;Kaisa Grönman ,&nbsp;Laura Lakanen ,&nbsp;Katri Behm ,&nbsp;Risto Soukka","doi":"10.1016/j.clet.2025.100897","DOIUrl":"10.1016/j.clet.2025.100897","url":null,"abstract":"<div><div>Circular economy is identified as a fundamental socio-technological systemic solution to solve the over-arching sustainability challenges resulting from human action, which entails an urgent need to implement circular economy solutions. To identify sustainable solution alternatives, a deeper understanding of impacts on the environmental sustainability of systems is needed. The goal of this study is to extend and apply the handprint approach to the assessment of potential positive environmental impacts of circular solutions. The extended handprint framework is tested in a case study to find out the potential positive climate impacts of a workplace-as-a-service system, which utilises several circularity strategies to lower the climate impact of office spaces in a system of several customers. In the simulated case study for three different customers, the workplace-as-a-service solution was found to decrease the life cycle greenhouse gas emissions of the studied system by 50% compared to a baseline of a business-as-usual office space during a time-period of 30 years. The handprint approach was found to be applicable to the assessment of positive environmental impacts in the studied case, while being compatible with existing methods and standards.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"24 ","pages":"Article 100897"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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