Waste Disposal & Sustainable Energy最新文献_第3页

The catalytic activity of Ca/Fe-rich incineration ash in the pyrolysis of epidemic wood 富钙/富铁焚烧灰对疫木热解的催化活性

Waste Disposal & Sustainable Energy Pub Date : 2025-05-21 DOI: 10.1007/s42768-025-00233-6

Yanjun Hu, Zhenxing Luo, Long Jiao, Caimeng Yu, Jian Li, Qianqian Guo, Jian Song

{"title":"The catalytic activity of Ca/Fe-rich incineration ash in the pyrolysis of epidemic wood","authors":"Yanjun Hu, Zhenxing Luo, Long Jiao, Caimeng Yu, Jian Li, Qianqian Guo, Jian Song","doi":"10.1007/s42768-025-00233-6","DOIUrl":"10.1007/s42768-025-00233-6","url":null,"abstract":"<div><p>The spread of pine nematode disease caused by epidemic wood poses a great challenge to the environment, and there is an urgent need to develop effective processing methods; however, Ca/Fe-rich sludge ash can improve the pyrolysis properties of biomass. Therefore, this paper focuses on the pyrolysis mechanism of epidemic wood with the addition of Ca/Fe-rich sludge ash. The presence of Ca-rich sludge ash was found to extend the pyrolytic temperature window of epidemic wood, intensify the cracking of its volatile constituents, and extend its reaction duration. At the same time, the Ca-rich sludge reduces the pyrolysis activation energy to 152.39 kJ/mol. The Fe-rich sludge ash demonstrated the capacity to lower the energy barriers during the initial phase of pyrolysis. Concurrently, the Ca-rich sludge ash accelerated the dehydration reaction of the epidemic wood, leading to 21.02% and 30.69% increases in the contents of acids and ketones in the pyrolytic oil, respectively. The Fe-rich sludge ash contributed to a notable 14.52% increase in aromatic compounds in the oil and a 19.14% decrease in alcoholic compounds. Additionally, the Ca-rich sludge ash accelerated the decomposition of lipid organic matter at elevated temperatures, enriching the pyrolytic char with more unsaturated bonds. This research lays a theoretical foundation for the safe and efficacious thermal decomposition of epidemic wood, thereby enhancing its utilization within the forestry industry.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 2","pages":"259 - 272"},"PeriodicalIF":0.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168012","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}

引用次数: 0

Sustainable catalytic upcycling of medical face mask wastes into hydrocarbon-rich gases for potential carbonaceous nanomaterial production 医用面罩废弃物的可持续催化升级循环转化为富含碳氢化合物的气体，用于潜在的碳质纳米材料生产

Waste Disposal & Sustainable Energy Pub Date : 2025-05-09 DOI: 10.1007/s42768-025-00228-3

Kai Qi Tan, Wen Da Oh, Mohd Azmier Ahmad, Siew Chun Low

{"title":"Sustainable catalytic upcycling of medical face mask wastes into hydrocarbon-rich gases for potential carbonaceous nanomaterial production","authors":"Kai Qi Tan, Wen Da Oh, Mohd Azmier Ahmad, Siew Chun Low","doi":"10.1007/s42768-025-00228-3","DOIUrl":"10.1007/s42768-025-00228-3","url":null,"abstract":"<div><p>The increased public health awareness in the post corona virus disease 2019 era and the usage of healthcare and cleanroom facilities have contributed to the escalation of the global face mask waste disposal. This study investigates the catalytic pyrolysis of face mask waste into hydrocarbon-rich gases, which holds significant value as prospective carbonaceous nanomaterial (CNM) precursors. The pyrolysis condition was fixed at 500 °C with a heating rate of 20 °C/min. The catalyst, Ni/ZSM-5 was produced from different metal impregnation strategies with various metal precursors namely nickel (Ni), magnesium (Mg), and calcium (Ca). Unlike conventional pyrolysis which focuses on liquid yield, the innovative multi-zone pyrolysis reactor with Ni/ZSM-5 produced an impressive gas yield of 47.0% (mass fraction), of which 79.1% was hydrocarbon gas that could be useful for promising CNM production. The crystallinity of Ni/ZSM-5 and the composition of gas product were largely maintained even after regeneration. Individual and mixed polymer kinetics studies were done using the model-free Ozawa–Flynn–Wall (OFW) method to obtained the activation energy, which was reduced by 9.4% when the Ni/ZSM-5 catalyst was introduced. These results indicate that the viability of Ni/ZSM-5 in reducing the reaction activation energy while concurrently improving the gas yield and quality for potential CNM production. This study improves the optimization of catalytic pyrolysis processes for producing high-quality non-condensable hydrocarbon gas, particularly in sustainable material synthesis.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 2","pages":"199 - 215"},"PeriodicalIF":0.0,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163763","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}

引用次数: 0

Mechanism and product analysis of sludge pyrolysis driven by double alkali synergy 双碱协同作用下污泥热解机理及产物分析

Waste Disposal & Sustainable Energy Pub Date : 2025-05-08 DOI: 10.1007/s42768-025-00225-6

Yingying Han, Cheng Zhang, Xia Li, Jiangshan Li, Le Fang

{"title":"Mechanism and product analysis of sludge pyrolysis driven by double alkali synergy","authors":"Yingying Han, Cheng Zhang, Xia Li, Jiangshan Li, Le Fang","doi":"10.1007/s42768-025-00225-6","DOIUrl":"10.1007/s42768-025-00225-6","url":null,"abstract":"<div><p>China's extensive sludge production has necessitated the development of advanced pyrolysis modification techniques, particularly those involving alkaline metals such as CaO and KOH. Previous studies have shown that CaO effectively captures phosphorus, whereas KOH promotes organic cracking. This study investigated dual-alkali-driven sludge pyrolysis processes for the production of biochar with stabilized heavy metals and enriched phosphorus contents. To elucidate the mechanisms underlying the pyrolysis process, advanced analytical techniques, including thermogravimetric analysis-Fourier transform infrared-gas chromatography–mass spectrometry (TG-FTIR-GC–MS), were employed to analyze the gas emissions from the CaO/KOH-modified sludge. Furthermore, infrared spectroscopy and X-ray diffraction phase analysis were used to characterize the resulting biochar. The results demonstrate that the influence of alkali metals on biochar composition and structure is closely related to the content of Lewis acids and bases in the sludge, and the reaction paths of CaO/KOH with typical functional groups (such as –COOH, –C–N and-C–OH) are given. For instance, CaO facilitates nitrogen volatilization, reducing its content by 17%–38%, whereas KOH retains nitrogen, increasing its content by 17%. The synergistic application of CaO and KOH significantly enhances the apatite phosphorus (AP) and total phosphorus (TP) ratio from 24%–35% to 87%–88%, and the AP to non-apatite inorganic phosphorus (NAIP) ratio from 0.32–0.54 to 5.74–43.77, thereby enabling the tuning of soil phosphorus availability and slow-release properties. Additionally, while CaO promotes phosphorus accumulation and assists in the sequestration of heavy metals, particularly Cr and Zn, KOH activates certain metals in the slag, potentially reducing their retention in the biochar.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 2","pages":"185 - 197"},"PeriodicalIF":0.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163383","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}

引用次数: 0

High-efficiency biochar production from oil palm fronds using acidic pretreatment and co-torrefaction with waste cooking oil 利用酸性预处理和废食用油共焙烧技术从油棕叶中高效生产生物炭

Waste Disposal & Sustainable Energy Pub Date : 2025-05-06 DOI: 10.1007/s42768-025-00229-2

Anisa Mutamima, Sunarno Sunarno, Indra Purnama, Nurfatihayati Nurfatihayati, Akmal Novendri, Rinalsi Anesta, Rozanna Sri Irianty

{"title":"High-efficiency biochar production from oil palm fronds using acidic pretreatment and co-torrefaction with waste cooking oil","authors":"Anisa Mutamima, Sunarno Sunarno, Indra Purnama, Nurfatihayati Nurfatihayati, Akmal Novendri, Rinalsi Anesta, Rozanna Sri Irianty","doi":"10.1007/s42768-025-00229-2","DOIUrl":"10.1007/s42768-025-00229-2","url":null,"abstract":"<div><p>Oil palm fronds (OPF) are a potential solid fuel source, similar to empty palm fruit bunches (EFB), yet high potassium (K) content can cause fouling and deposition in boiler systems. To mitigate these issues, an acidic torrefaction liquid pretreatment was applied to reduce OPF potassium level, and co-torrefaction with waste cooking oil (WCO) was employed to enhance the resulting biochar’s higher heating value (HHV). X-ray fluorescence (XRF) analysis indicated that acidic pretreatment lowered potassium content from 35.48% to 20.91%, a reduction of approximately 41%, thereby significantly diminishing K-induced fouling risk. Through systematic variation of pretreatment temperature (30–50 °C), duration (45–75 min), WOPF-to-WCO ratio (1:0–3:1, mass/mass), and co-torrefaction temperature (200–300 °C), optimal conditions were identified at 50 °C for 75 min, an WOPF-to-WCO ratio of 1:1, and co-torrefaction at 250 °C. Under these parameters, WCO contributed additional hydrocarbons, increasing fixed carbon content and reducing oxygen level, thereby improving the fuel stability and HHV. The biochar exhibited a mass yield of 60.95%, an energy yield of 87.43%, and a HHV of 31.97 MJ/kg, surpassing the performance of untreated OPF biochar. By simultaneously reducing potassium content and enriching carbon and hydrogen fractions, this optimized biochar exhibits enhanced combustion properties, positioning it as a sustainable alternative to coal with higher energy density and lower operational risk in combustion systems.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 2","pages":"229 - 242"},"PeriodicalIF":0.0,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42768-025-00229-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163083","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

Mechanistic insights into the chlorination volatilization of oxidized heavy metals via novel staggered chlorination roasting 新型交错氯化焙烧对氧化重金属氯化挥发机理的研究

Waste Disposal & Sustainable Energy Pub Date : 2025-05-05 DOI: 10.1007/s42768-025-00223-8

Chenglong Lu, Xuan Yu, Guohao Yang, Qianqian Guo, Long Jiao, Jinxiang Lin, Kai Deng, Yanjun Hu

{"title":"Mechanistic insights into the chlorination volatilization of oxidized heavy metals via novel staggered chlorination roasting","authors":"Chenglong Lu, Xuan Yu, Guohao Yang, Qianqian Guo, Long Jiao, Jinxiang Lin, Kai Deng, Yanjun Hu","doi":"10.1007/s42768-025-00223-8","DOIUrl":"10.1007/s42768-025-00223-8","url":null,"abstract":"<div><p>Improper handling of heavy metal-containing solid waste poses significant environmental risks. However, developing an effective heavy metal elimination method is still a challenge. Our study introduces a novel method of staggered chlorination roasting. The volatilization and removal effects of two chlorinating agents, NH₄Cl and CaCl₂, on typical key heavy metals, Zn and Cu, were investigated. Compared with the use of a single chlorinating agent, this method, which uses NH₄Cl for low-temperature decomposition and CaCl₂ for high-temperature reactions, significantly extends the chlorination reaction time, overtly enhancing the chlorination volatilization effect. This study elucidated the influence of the chlorinating agent content, temperature, and time on the elimination of heavy metal oxides. The results demonstrated that when the two chlorinating agents were added at a ratio of 2:3, roasting at 1100 °C for 60 min resulted in the highest volatilization rates of Zn (99.9%) and Cu (98.7%). Thermodynamic equilibrium and equilibrium phase composition calculations were conducted to explore the effects of the chlorinating agents and mineral components (SiO₂, Al₂O₃, Fe₂O₃, and CaO) on chlorination roasting. In the staggered chlorination mode, the chlorine-containing gases generated effectively mitigate the influence of mineral components, thereby suppressing interactions between oxidized heavy metals and mineral constituents. This suppression enhances the chlorination and volatilization of heavy metals. This study proposes a novel staggered chlorination roasting method based on composite chlorinating agents, offering a new approach for the collaborative and efficient removal of multiple heavy metals from solid waste.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 2","pages":"151 - 163"},"PeriodicalIF":0.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162608","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}

引用次数: 0

Preheating and combustion characteristics of high-alkali coal with a novel circulating fluidized bed route 新型循环流化床高碱煤的预热与燃烧特性

Waste Disposal & Sustainable Energy Pub Date : 2025-05-04 DOI: 10.1007/s42768-025-00227-4

Dongxu Zhang, Huizhong Han, Jianguo Zhu

{"title":"Preheating and combustion characteristics of high-alkali coal with a novel circulating fluidized bed route","authors":"Dongxu Zhang, Huizhong Han, Jianguo Zhu","doi":"10.1007/s42768-025-00227-4","DOIUrl":"10.1007/s42768-025-00227-4","url":null,"abstract":"<div><p>China possesses abundant reserves of high-alkali coal, however, its combustion presents challenges such as slagging and fouling. Achieving efficient and clean combustion of high-alkali coal remains a significant technical challenge. This study utilizes novel circulating fluidized bed (CFB) preheating combustion technology to investigate the effects of varying air equivalence ratios on the preheating, combustion, and NO<sub><i>x</i></sub> emission characteristics of high-alkali coal in a kW-level hot-state experimental platform. Results indicate that the preheater intensifies the fragmentation of high-alkali coal particles, decreasing the median particle size (d<sub>50</sub>) from 710.9 μm in high-alkali coal to 17.1 μm in preheated char. At an air equivalence ratio of 0.35, the calorific value of the preheated coal gas reaches a peak of 2.46 MJ/Nm<sup>3</sup>. Across various air equivalence ratios, the NH<sub>3</sub> concentration in the preheated coal gas consistently exceed those of HCN. With the air equivalence ratio increases, the release rates of C, N, and S from the high-alkali coal also rise, while the CO/CO<sub>2</sub> ratio of the preheated coal gas remains below 1.0. And the S release rate is lower than that of C and N. During the combustion of preheated fuel in the combustion chamber, the temperature distribution remains uniform, with NO<sub><i>x</i></sub> emissions ranging from 200 to 230 mg/m<sup>3</sup>. The minimum conversion ratio of coal N to NO<sub><i>x</i></sub> in this system is 10.8%. This investigation might support the development and application of high-alkali coal combustion technology.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 2","pages":"217 - 228"},"PeriodicalIF":0.0,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161943","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}

引用次数: 0

Evolving dynamics of municipal solid waste management in India: a comprehensive review of status, challenges, opportunities and policy innovations 印度城市固体废物管理的演变动态：对现状、挑战、机遇和政策创新的全面审查

Waste Disposal & Sustainable Energy Pub Date : 2025-04-24 DOI: 10.1007/s42768-024-00220-3

Anitha Rengerla, Parthiban Angamuthu

{"title":"Evolving dynamics of municipal solid waste management in India: a comprehensive review of status, challenges, opportunities and policy innovations","authors":"Anitha Rengerla, Parthiban Angamuthu","doi":"10.1007/s42768-024-00220-3","DOIUrl":"10.1007/s42768-024-00220-3","url":null,"abstract":"<div><p>India’s rapid urbanization, population growth, and industrial expansion have intensified the challenges of solid waste management (SWM), making it a critical issue requiring urgent action. This paper examines the key challenges, trends, and opportunities in SWM, focusing on waste generation patterns, collection, transportation, treatment, and disposal methods in India. The major challenges identified include inefficient waste segregation, poor disposal practices, societal attitudes, and the unorganized informal sector. These problems, compounded by institutional weaknesses, inadequate funding, and slow adoption of technology, worsen the waste management crisis. Proper management of municipal solid waste (MSW) is essential for public health, environmental protection, and the achievement of sustainable development goals. This paper emphasizes the need for alternative waste management techniques, as nearly 90% of MSW is improperly disposed of in open dumps and landfills, posing significant risks to health and the environment. By forecasting future urbanization trends and their impact on waste generation, this paper evaluates effective treatment technologies for MSW in India. This study concludes with actionable recommendations and a unified framework, supported by data and case studies tailored to India’s socio-economic context, and aims at improving SWM practices and promoting long-term sustainability.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 1","pages":"127 - 150"},"PeriodicalIF":0.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949716","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}

引用次数: 0

Leaching of calcium and heavy metals from fly ash by acetic acid and life cycle assessment of the leaching processes 粉煤灰中钙和重金属的醋酸浸出及其生命周期评价

Waste Disposal & Sustainable Energy Pub Date : 2025-04-13 DOI: 10.1007/s42768-025-00222-9

Weichao Kong, Yaqi Peng, Xinglei Zhao, Jiamin Ding, Qionghao Wang, Hengsheng Pan, Xin Xiao, Shengyong Lu

{"title":"Leaching of calcium and heavy metals from fly ash by acetic acid and life cycle assessment of the leaching processes","authors":"Weichao Kong, Yaqi Peng, Xinglei Zhao, Jiamin Ding, Qionghao Wang, Hengsheng Pan, Xin Xiao, Shengyong Lu","doi":"10.1007/s42768-025-00222-9","DOIUrl":"10.1007/s42768-025-00222-9","url":null,"abstract":"<div><p>Municipal solid waste incineration (MSWI) fly ash poses severe environmental risks because of the high potential of fly ash for heavy metal leaching. In this study, the leaching of fly ash by acetic acid was investigated. Key parameters, including time, acetic acid concentration, and fly ash type, were examined for their influence on calcium and heavy metal leaching. The physical and chemical changes in fly ash before and after leaching were analysed via the X-ray fluorescence (XRF), X-ray diffraction (XRD), and heavy metal leaching methods. The results showed that acetic acid effectively leached metals from different types of fly ash, as determined by the risk assessment code (RAC) and risk index (RI), and leaching with 0.25 mol/L acetic acid resulted in the lowest environmental hazard for fly ash. Moreover, adjusting the pH to below 11 during acid treatment, followed by washing with water, substantially reduced heavy metal leaching and increased the potential for safe resource recovery. A life cycle assessment (LCA) using the CML-2001 method revealed that the marine aquatic ecotoxicity potential had the largest environmental impact, accounting for 39.56% of the total index. These findings suggest that acetic acid leaching followed by water washing, improves the potential for repurposing of fly ash as a construction material.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 1","pages":"115 - 126"},"PeriodicalIF":0.0,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949426","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}

引用次数: 0

Waste to wealth: silane-modified seaweed biopolymers for sustainable packaging material 废物转化财富：用于可持续包装材料的硅烷改性海藻生物聚合物

Waste Disposal & Sustainable Energy Pub Date : 2025-03-31 DOI: 10.1007/s42768-024-00218-x

C. M. Hazwan, C. S. Chang, A. H. Yusoff, N. F. Shoparwe, M. J. K. Mohammad

{"title":"Waste to wealth: silane-modified seaweed biopolymers for sustainable packaging material","authors":"C. M. Hazwan, C. S. Chang, A. H. Yusoff, N. F. Shoparwe, M. J. K. Mohammad","doi":"10.1007/s42768-024-00218-x","DOIUrl":"10.1007/s42768-024-00218-x","url":null,"abstract":"<div><p>In response to the growing environmental threat posed by plastic waste, this study developed hydrophobic biopolymer films from red seaweed (<i>Kappaphycus alvarezii</i>) as a sustainable alternative for packaging. The films were fabricated using a solvent-casting method, followed by surface treatment with triethoxymethylsilane to increase their hydrophobicity. Key metrics, including water solubility (reduced by 37.4%), moisture absorption capacity (decreased by 108.6%), and water vapor permeability (decreased by 65.4%), demonstrated significant improvements over untreated films. Fourier transform infrared (FT-IR) spectroscopy confirmed successful silane integration, whereas mechanical testing revealed increased tensile strength (up to 24.44 MPa) and Young’s modulus (183.41 MPa), with a moderate reduction in elongation at break. These findings indicate that silane-modified seaweed biopolymer films have strong potential as eco-friendly packaging solutions to mitigate plastic waste.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 1","pages":"99 - 114"},"PeriodicalIF":0.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949572","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}

引用次数: 0

Synergistic effect of Ce doping and phosphorylation on optimizing the low temperature NH3-SCR activity of the spent V2O5-WO3/TiO2 catalyst Ce掺杂和磷酸化对优化废V2O5-WO3/TiO2催化剂低温NH3-SCR活性的协同效应

Waste Disposal & Sustainable Energy Pub Date : 2025-03-14 DOI: 10.1007/s42768-024-00217-y

Qiulin Wang, Xiongfei Qi, Haonan Wang, Minghui Tang, Shengyong Lu, Dunyu Liu, Jing Jin

{"title":"Synergistic effect of Ce doping and phosphorylation on optimizing the low temperature NH3-SCR activity of the spent V2O5-WO3/TiO2 catalyst","authors":"Qiulin Wang, Xiongfei Qi, Haonan Wang, Minghui Tang, Shengyong Lu, Dunyu Liu, Jing Jin","doi":"10.1007/s42768-024-00217-y","DOIUrl":"10.1007/s42768-024-00217-y","url":null,"abstract":"<div><p>The reactivation and subsequent reuse of exhausted selective catalytic reduction (SCR) catalysts has significant economic and environmental advantages. Water and acid washing along with thermal regeneration are commonly used to eliminate toxic substances from the catalyst surface, while these processes often result in the undesired loss of active components. In this research, an impregnation approach was adopted to replenish the depleted active constituents of the spent V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> (VW/Ti) catalyst. Experimental investigations were conducted to evaluate the influence of Ce/P doping on both the SCR activity of this rejuvenated catalyst and its resistance to the detrimental effects of SO<sub>2</sub>/H<sub>2</sub>O exposure. The optimal performance is achieved with the Ce/P co-doped VW/Ti catalyst, demonstrating remarkable efficiency in removing nearly 100% of NO<sub><i>x</i></sub> across a broad range of temperatures from 150 to 450 °C. The incorporation of a proper content of Ce serves to increase the VO<sub><i>x</i></sub> surface density from a sub-monolayer state to a monolayer state and fosters the formation of more surface oxygen vacancies. This transformation positively contributes to enhancing both the catalytic activity and the resistance to SO<sub>2</sub>/H<sub>2</sub>O poisoning. Further treatment with H<sub>3</sub>PO<sub>4</sub>, although rendering the catalyst more susceptible to H<sub>2</sub>O, achieves a delicate balance between its surface acidity and redox capabilities. This optimized state not only enhances the catalyst's robustness but also further widens the active temperature window.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"7 1","pages":"73 - 84"},"PeriodicalIF":0.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42768-024-00217-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949446","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