Case Studies in Chemical and Environmental Engineering最新文献

{"title":"Tannery shaving dust-based charcoal blended adsorbent for efficient heavy metal remediation: An experimental and machine learning approach","authors":"Md. Sabbir Hosen ,&nbsp;Md. Sahariar Sahen ,&nbsp;Hasan Ahmed ,&nbsp;Md. Selim Reza ,&nbsp;Pranta Bhowmik ,&nbsp;Farzana Mim ,&nbsp;Md. Badrul Islam ,&nbsp;Md. Azizul Haque Khan Naim ,&nbsp;Mohammad Majibur Rahman ,&nbsp;Md. Mostafizur Rahman","doi":"10.1016/j.cscee.2025.101256","DOIUrl":"10.1016/j.cscee.2025.101256","url":null,"abstract":"<div><div>Tannery shaving dust (TSD) is one of the tannery wastes, poses significant concerns due to its availability and carcinogenic properties. This study has focused on utilizing this waste as adsorbent for heavy metals (HMs) treatment in wastewater. By crosslinking polyvinyl alcohol (PVA) with activated tannery shaving dust (AsD) from TSD and modified charcoal (MC) powder, a composite PVA-AsD-MC adsorbent (PAsMc) was fabricated to remove As, Cr, Zn and Pb from synthetic wastewater. Here, PVA-AsD (1:10) blended with 2:3 MC has sufficient active sites that were ensured by the FT-IR. As an adsorbent the PAsMc showed more thermal stability than AsD, and surface morphology was observed as highly rough. Moreover, the batch experiments have considered pH, adsorbent dose, and contact time factors, achieving impressive metals removal efficiencies: 98.86 % for As, 99.45 % for Cr, 99.72 % for Zn, and 98.30 % for Pb. The optimal conditions were identified as an adsorbent dosage of 4.0 g/L for 25 minutes, and an agitation speed of 300 rpm at pH 8.0–9.0. The adsorption isotherm and kinetics model provided an auspicious result for chemisorption adsorption on the surface. Notably, these datasets were then enhanced with the machine learning model, specifically the Random Forest (RF), aimed at predicting the removal of HMs. The <em>R</em>^<em>2</em> values for the training and testing dataset within the range of 0.9927–0.9984 and 0.9940–0.9975 with a RMSE value of 0.9622–1.4612 and 1.1125–1.9294, respectively. Ultimately, a predictive model for HMs removal was developed, which will assist in making rational applications of PAsMc in wastewater treatment.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101256"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144569735","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}

{"title":"Double-xerogel network composite zeolite granules targeting dual-functional fertilizers","authors":"Nguyen Manh Khang ,&nbsp;Vo Tran Minh Khoa ,&nbsp;Nguyen Thi Truc Phuong ,&nbsp;Nguyen Xuan Du ,&nbsp;Ngo Tran Hoang Duong ,&nbsp;Nguyen Van Dung ,&nbsp;Tran Thuy Tuyet Mai ,&nbsp;Nguyen Quang Long","doi":"10.1016/j.cscee.2025.101253","DOIUrl":"10.1016/j.cscee.2025.101253","url":null,"abstract":"<div><div>Food security remains a global challenge due to rapid population growth, intensive agricultural practices, and freshwater scarcity. This study presents the development of dual-functional composite granules combining sodium alginate (SA), gelatin, GIS-type zeolite, and CuO/ZnO nanorods for enhanced water retention and controlled micronutrient release. The GIS-type zeolite exhibited high water adsorption capacity (0.75 g H₂O/g), while the incorporation of gelatin significantly increased the swelling ratio from 0.6 to 1.7, improving water retention and soil conditioning. CuO and ZnO nanorods embedded within the composite granules facilitated the controlled release of copper and zinc ions under acidic conditions (pH 4). The release of Cu²⁺ followed super case II transport (n = 0.98–1.10), while Zn²⁺ release followed an erosion-driven Weibull model. Water retention in soil increased by 20 % with gelatin-based granules after 7 days, and the water holding capacity of soil improved by 15 %–20 %. The composite granules demonstrated excellent mechanical stability, with a compressive stress of 1.5–5.5 MPa. This dual-functional system offers a sustainable approach to enhancing soil fertility and addressing micronutrient deficiencies while improving water retention in agricultural soils.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101253"},"PeriodicalIF":0.0,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502739","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}

{"title":"Reducing fouling and emitter clogging in saline water drip irrigation systems by choosing suitable nitrogen fertilizer","authors":"Changjian Ma ,&nbsp;Weijie Chen ,&nbsp;Bowen Li ,&nbsp;Enkai Cao ,&nbsp;Yan Li ,&nbsp;Zeqiang Sun ,&nbsp;Yang Xiao ,&nbsp;Yunkai Li","doi":"10.1016/j.cscee.2025.101254","DOIUrl":"10.1016/j.cscee.2025.101254","url":null,"abstract":"<div><div>The reuse of saline water through drip irrigation presents a sustainable solution to water scarcity, but fouling and emitter clogging are significant obstacles to broader adoption. While fertilization is known to play a key role in fouling, the combined effects of saline water and fertilizer on fouling and clogging remain poorly understood. This study evaluates the impact of five nitrogen fertilizers—urea phosphate, ammonium sulfate, ammonium chloride, calcium nitrate, and ammonium bicarbonate—on emitter performance and fouling in saline water drip irrigation systems. The results show that urea phosphate, ammonium sulfate, and ammonium chloride reduce fouling by 78 %, 54 %, and 34 %, respectively, compared to the control with no fertilization. These fertilizers mitigate fouling by suppressing the formation of calcite, aragonite, and dolomite precipitates, while also preventing particle flocculation, such as quartz and feldspar. In contrast, calcium nitrate and ammonium bicarbonate exacerbate fouling, increasing it by 46 % and 96 %, respectively, due to their promotion of both crystalline and particulate fouling substances. This study highlights the effectiveness of urea phosphate, ammonium sulfate, and ammonium chloride in minimizing fouling and emitter clogging, offering key insights for advancing fertigation technologies in saline environments.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101254"},"PeriodicalIF":0.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523372","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}

{"title":"Assessment of a sargassum-based liquid biofertilizer for enhanced banana cultivation in small-scale family farms","authors":"Yaset Rodríguez-Rodríguez ,&nbsp;Laura Isabel Soldevilla-Hernández ,&nbsp;Miguel Ángel Guevara ,&nbsp;Gustavo Gandini ,&nbsp;Ulises Javier Jáuregui-Haza","doi":"10.1016/j.cscee.2025.101252","DOIUrl":"10.1016/j.cscee.2025.101252","url":null,"abstract":"<div><div>The substantial influxes of pelagic <em>Sargassum</em> spp. along Caribbean coasts pose environmental challenges for the region's countries, but also offer opportunities for sustainable valorization. This research develops and evaluates a <em>Sargassum</em>-Based Liquid Biofertilizer (SBLB) produced via anaerobic fermentation, uniquely reducing heavy metal content (e.g., arsenic from 61.6 to 4.08 mg/kg) while retaining beneficial nutrients and microorganisms. This biofertilizer was applied to banana cultivation in Dominican small-scale family farms, SBLB enhanced leaf emission (p &lt; 0.05 in two of three farms) compared to a traditional biofertilizer (BLB) and maintained Black Sigatoka disease below intervention thresholds, matching BLB performance. Chemical and microbiological analyses confirmed SBLB’s safety and efficacy, positioning it as a sustainable alternative to chemical fertilizers. This approach mitigates Sargassum waste and supports organic farming, offering a replicable model for coastal agricultural systems.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101252"},"PeriodicalIF":0.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471519","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}

{"title":"Influence of pyrolysis conditions on the adsorbent properties of hazelnut shell biochar to remove paracetamol, amoxicillin, and triclosan","authors":"Paula Madariaga-Segovia ,&nbsp;Cristina A. Villamar-Ayala ,&nbsp;Norma Ramos ,&nbsp;Margarita Sánchez-Domínguez ,&nbsp;Roberto Lavín","doi":"10.1016/j.cscee.2025.101251","DOIUrl":"10.1016/j.cscee.2025.101251","url":null,"abstract":"<div><div>This study optimized the production of biochar from hazelnut shells for the adsorption of paracetamol, amoxicillin, and triclosan from water. Biochar was produced under 27 conditions (temperature: 500–900 °C, time: 0.5–2 h, particle size: 150–2000 μm). Physicochemical and instrumental analyses, as well as batch adsorption tests, characterized the samples. Temperature (900 °C) is the most significant factor influencing biochar properties and adsorption performance. Adsorption data fitted well with heterogeneous isotherm models, including the Sips model and multilayer/monolayer models. The maximum adsorption capacities for paracetamol, amoxicillin, and triclosan were 19.973, 2.992, and 2.678 mg/g, respectively. Biochar-based adsorption systems with water treatment applications will be scaled.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101251"},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480272","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}

{"title":"Run-of-mine bauxite processing residue recovery from the mining industry for the production of artificial aggregate geopolymer paste","authors":"Fitriana Meilasari ,&nbsp;I.D.A.A. Warmadewanthi ,&nbsp;Yulinah Trihadiningrum ,&nbsp;Januarti Jaya Ekaputri ,&nbsp;Hendri Sutrisno","doi":"10.1016/j.cscee.2025.101249","DOIUrl":"10.1016/j.cscee.2025.101249","url":null,"abstract":"<div><div>Rising global construction demand led to natural aggregate overexploitation and environmental degradation. Using run-of-mine bauxite processing residue (RBPR) as artificial aggregate offers sustainable construction solutions while supporting Sustainable Development Goals No. 9 (Innovation and Infrastructure), 11 (Sustainable Cities), and 12 (Responsible Consumption). RBPR was produced into artificial aggregate geopolymer paste (AAGP) using mold casting and thermal methods. XRD, FTIR, and SEM-EDS analyses confirmed geopolymer essential minerals in AAGP, indicating successful sodium aluminosilicate gel formation, the fundamental binding phase in geopolymers. AAGP compressive strengths exceed 12 MPa, and total CO₂ emissions from its production were 1.786–2.992 kg CO₂/kg material.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101249"},"PeriodicalIF":0.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306640","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}

{"title":"Modelling and optimization of carbon dioxide sequestration potential of carbide slag waste","authors":"Manisha Sukhraj Kothari,&nbsp;Ashraf Aly Hassan,&nbsp;Amr El-Dieb,&nbsp;Hilal El-Hassan","doi":"10.1016/j.cscee.2025.101250","DOIUrl":"10.1016/j.cscee.2025.101250","url":null,"abstract":"<div><div>Mineral carbonation (MC) of industrial wastes has gained significant attention as a promising approach for reducing carbon dioxide (CO₂) emissions. This study investigates the wet-phase MC of carbide slag waste at realistic conditions for CO₂ capture and storage. Response Surface Methodology with a central-composite design was employed for optimization and modeling for wet-phase MC of carbide slag waste. Five operational parameters namely temperature, pressure, relative humidity, liquid-to-solid (L/S) ratio, and CO₂ loading rate were analyzed for their individual and interactive effects on CO₂ capture capacity and the reaction kinetics. Further, quadratic models were developed to predict CO₂ capture capacity and time required for 50 % carbonation conversion (time₅₀). The results revealed that the most influential factor was pressure followed by the L/S ratio for CO₂ capture capacity. While time₅₀ was majorly influenced by the CO₂ loading rate and pressure. The quadratic models for CO₂ capture capacity and time₅₀ have an R² value of 0.9863 and 0.9986, respectively. Moreover, the results predicted from the models for both responses were closely aligned with the experimental results. The optimized conditions yielded a maximum CO₂ capture capacity of 11.9 mol kg<strong>⁻¹</strong> at 10 bar pressure, 65 °C, in the presence of 0.2 L/S ratio and 75 % relative humidity in 121 minutes, where 50 % conversion occurs in the first 52 minutes. In conclusion, wet-phase MC of carbide slag represents a promising approach to address both industrial waste utilization and CO₂ reduction. The high CO₂ capture capacity achieved under various experimental conditions demonstrates carbide slag as a viable candidate for large-scale CO₂ capture applications. Furthermore, techno-economic analysis and scalability assessments will be crucial in advancing this approach to industrial relevance.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101250"},"PeriodicalIF":0.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471520","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}

{"title":"Potential application of a fruit-based natural deep eutectic solvent for water-in-crude-oil emulsification process for enhancing oil recovery and upstream oil applications","authors":"Arafat Husain ,&nbsp;Noran Mousa ,&nbsp;Basim Abu-Jdayil","doi":"10.1016/j.cscee.2025.101244","DOIUrl":"10.1016/j.cscee.2025.101244","url":null,"abstract":"<div><div>The growing demand for oil underscores the importance of efficient tertiary recovery methods. Among these, chemical enhanced oil recovery (CEOR) stands out due to its cost-effectiveness and lower capital investment. Natural deep eutectic solvents (NADES), composed of environmentally friendly and biodegradable components, offer a sustainable alternative to conventional toxic chemicals used in CEOR. This study explores the use of a citric acid/fructose/water NADES formulation for stabilizing emulsions of light crude oil and water, a critical factor for improving oil recovery efficiency. Key variables investigated include the number of moles of water used in NADES preparation, the water dilution ratio, and the molar ratios of citric acid to fructose (CA/Fr) and vice versa (Fr/CA). The study found that although water used in NADES preparation contributes to its structure, its quantity had little effect on emulsion stability. In contrast, optimal water dilution and adjusted CA/Fr molar ratios significantly improved both emulsion stability and viscosity. Injection of the NADES formulation led to effective emulsion stabilization using seawater and brine. Moreover, the NADES injection reduced interfacial tension from 19 to 5.02 mN/m and contact angle from 72° to 30.8°, promoting a water-wet condition favorable for oil displacement. These findings were further validated by rheological tests, which demonstrated increased viscosity and emulsion stability. Overall, this study highlights the potential of NADES as a sustainable, high-performance solvent in CEOR, offering both environmental and operational advantages for future oil extraction technologies.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101244"},"PeriodicalIF":0.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279315","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}

{"title":"The use of recycled corrugated iron as efficient electrodes in a batch electrocoagulation treatment process for the removal of algal and bacterial nutrients from raw water","authors":"Siyanda Yamba ,&nbsp;Nomso C. Hintsho-Mbita ,&nbsp;Nonhlangabezo Mabuba","doi":"10.1016/j.cscee.2025.101246","DOIUrl":"10.1016/j.cscee.2025.101246","url":null,"abstract":"<div><div>The presence of ammonia, nitrates and phosphates in raw water promotes the excessive growth of toxic algal blooms which reduce water quality and cause health risks to aquatic and human life. Hence, batch electrocoagulation parameters were optimized (15V, pH 6, 40 mg/l and 20 min) to remove algal nutrients using a recycled corrugated electrode (50 mm × 150 mm x 0.3 mm) in raw water. The electrode was characterized using FTIR, SEM and EDS. It removed 99 ± 0.6 %, 98 ± 05 %, 89 ± 0.3 %, above 99 % of phosphate, nitrate, ammonia, and bacteria respectively. Electrocoagulation is efficient, removes chemicals, bacteria and it is inexpensive.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101246"},"PeriodicalIF":0.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306641","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}

{"title":"Energy-water usage and greenhouse gas emissions nexus of the natural rubber industry in Vietnam","authors":"Hong Dao Nguyen Pham ,&nbsp;Takahiro Watari ,&nbsp;Nhu Nguyet Phan ,&nbsp;Minh Duc Tran ,&nbsp;Lan Huong Nguyen ,&nbsp;Masashi Hatamoto ,&nbsp;Kazuaki Syutsubo ,&nbsp;Takashi Yamaguchi","doi":"10.1016/j.cscee.2025.101245","DOIUrl":"10.1016/j.cscee.2025.101245","url":null,"abstract":"<div><div>The natural rubber industry is one of the leading forces in the agro-industry in Vietnam and is expected to expand in response to growing material demands. However, as the industry pursues profit targets, there is also a pressing need to consider its sustainability. One challenge is the lack of detailed information on the life cycle of natural rubber products, particularly regarding energy consumption, which could hinder sustainable practices. Based on an on-site survey of six natural rubber processing companies in the Southeast and Central Highlands of Vietnam, this field research aims to evaluate the sustainability of the natural rubber industry by examining greenhouse gas (GHG) emissions from energy and water consumption throughout the life cycle of all products. Over two years, biogas, wastewater, and sludge samples were collected multiple times from each factory involved in the research and facilitated with both testing the characteristics and components of these samples, as well as calculating their carbon footprint by the 2006 Guidelines of the Intergovernmental Panel on Climate Change (IPCC). GHG emissions from the two most dominant Vietnamese natural rubber products were 589 and 133 kg CO₂eq., respectively, generated from each ton of Standard Vietnamese Rubber (SVR) and Centrifuged Latex (CL) products produced. Our study identified three main sources of GHG emissions in the Vietnamese natural rubber industry: high electricity use during the SVR production process, vast ammonia requirements for the CL production process, and direct CH₄ and CO₂ emissions from the regulation tanks of the wastewater processes. Most surveyed factories have taken significant steps in adopting sustainable practices to reduce their GHG emissions. By combining conventional efforts of factories with GHG emission calculations during this field trip, our research proposes significant energy-saving executions to promote sustainable development in the regional natural rubber industry.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101245"},"PeriodicalIF":0.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239576","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}