Case Studies in Chemical and Environmental Engineering最新文献

High yield gluconic acid leaching and recovery of valuable metals from end-of-life lithium-ion batteries 高收率葡萄糖酸浸出和回收废旧锂离子电池中的有价金属

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-29 DOI: 10.1016/j.cscee.2025.101271

Reinhard Lerchbammer, Eva Gerold, Helmut Antrekowitsch

{"title":"High yield gluconic acid leaching and recovery of valuable metals from end-of-life lithium-ion batteries","authors":"Reinhard Lerchbammer, Eva Gerold, Helmut Antrekowitsch","doi":"10.1016/j.cscee.2025.101271","DOIUrl":"10.1016/j.cscee.2025.101271","url":null,"abstract":"<div><div>This study underscores the increasing relevance of organic acids as environmentally sustainable alternatives to conventional inorganic leaching agents. Beyond reducing the ecological footprint of leaching processes, organic acids offer improved selectivity and efficiency in metal recovery. Among them, gluconic acid has proven to be a particularly effective agent for the extraction of valuable metals.</div><div>Through statistical optimization, the leaching process achieved extraction efficiencies exceeding 98 % for lithium, nickel, cobalt, and manganese from end-of-life lithium-ion batteries (EoL-LIBs), while significantly limiting the co-dissolution of copper, iron, and aluminum.</div><div>Subsequently, nickel, cobalt, and manganese were selectively recovered through precipitation using oxalic and sulphide agents. Oxalic acid demonstrated high selectivity, leaving lithium and aluminum in solution, and enabling recovery rates of 99 %, 100 %, and 86 % for nickel, cobalt, and manganese, respectively. Sulphide precipitation was similarly effective, achieving over 97 % recovery of nickel and cobalt at pH 4.</div><div>The work consolidates current knowledge on gluconic acid-based leaching and systematically evaluates its combination with conventional precipitation methods. Although complex chemical interactions in gluconate matrices occur, this study achieves high extraction and recovery efficiencies, demonstrating the practicality and potential integration of this combined approach into existing industrial recovery systems.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101271"},"PeriodicalIF":0.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749579","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

Kinetics, adsorption mechanism, and economic viability of an eco-friendly amorphous carbon thin-film adsorbent synthesized from agricultural waste for removal of 2,4-dichlorophenol and 2,4,6-trichlorophenol in water environment 农业废弃物合成无定形碳薄膜吸附剂去除水中2,4-二氯酚和2,4,6-三氯酚的动力学、吸附机理及经济可行性

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.cscee.2025.101268

Zaharaddeen N. Garba , Chavalit Ratanatamskul

引用次数: 0

The effect of mechanical milling and two-step sintering technique on the microstructure, microhardness, strength, and dielectric properties of Sm2Zr2O7 ceramics 机械铣削和两步烧结工艺对Sm2Zr2O7陶瓷显微结构、显微硬度、强度和介电性能的影响

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.cscee.2025.101270

I.E. Kenzhina , A.L. Kozlovskiy , R.I. Shakirzyanov , M.E. Kaliyekperov , N.O. Volodina , S.A. Maznykh , M. Begentayev , S.K. Askerbekov , Zh.A. Zaurbekova , A.U. Tolenova , P.A. Blynskiy

{"title":"The effect of mechanical milling and two-step sintering technique on the microstructure, microhardness, strength, and dielectric properties of Sm2Zr2O7 ceramics","authors":"I.E. Kenzhina , A.L. Kozlovskiy , R.I. Shakirzyanov , M.E. Kaliyekperov , N.O. Volodina , S.A. Maznykh , M. Begentayev , S.K. Askerbekov , Zh.A. Zaurbekova , A.U. Tolenova , P.A. Blynskiy","doi":"10.1016/j.cscee.2025.101270","DOIUrl":"10.1016/j.cscee.2025.101270","url":null,"abstract":"<div><div>This paper investigates the effect of two-step sintering on the mechanical properties and microstructure of Sm<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> ceramics obtained from submicron powders after high-energy milling. Two key parameters of the two-step sintering process are analyzed: temperature and duration, as both can significantly influence grain growth processes in ceramics. It was found that extending the sintering duration at lower temperatures promotes ceramic densification while preserving a relatively narrow grain size distribution. In contrast, higher sintering temperatures combined with shorter durations result in broader grain size distributions and more pronounced exaggerated grain growth. Despite differences in microstructure and grain size distribution, both the sample sintered at 1350 °C for 20 hours and the one sintered at 1700 °C for 10 minutes exhibited the highest mechanical properties, with microhardness values HV1 ∼1200 and biaxial flexural strength reaching ∼125 MPa. This suggests that the enhancement of mechanical performance may be linked to a reduction in internal stresses, either due to the elevated temperature during the first sintering step or the extended holding time during the second step. Thus, in both types of sintering, whether based on prolonged holding time or elevated temperature, changes in sample morphology and grain size do not appear to have a significant impact on the mechanical properties of the resulting ceramics.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101270"},"PeriodicalIF":0.0,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723148","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

CADMIUM(II) removal from aqueous solution by adsorption on water hyacinth (Eichhornia crassipes) hydrochar modified with citric acid 柠檬酸改性水葫芦（Eichhornia crassipes）氢炭吸附去除水中镉(II

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.cscee.2025.101267

Carolina Vázquez-Mendoza , Roberto Leyva-Ramos , Nahum Andrés Medellín-Castillo , Damarys Haidee Carrales-Alvarado , Antonio Aragón-Piña

引用次数: 0

From waste to resource: King coconut biochar as a green adsorbent for bisphenol A removal 从废物到资源：国王椰子生物炭作为一种绿色吸附剂去除双酚a

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-23 DOI: 10.1016/j.cscee.2025.101261

Hashinika Matharage , Mahesh Jayaweera , Nilanthi Bandara , Jagath Manatunge , Daham Jayawardana , Janith Dissanayake

{"title":"From waste to resource: King coconut biochar as a green adsorbent for bisphenol A removal","authors":"Hashinika Matharage , Mahesh Jayaweera , Nilanthi Bandara , Jagath Manatunge , Daham Jayawardana , Janith Dissanayake","doi":"10.1016/j.cscee.2025.101261","DOIUrl":"10.1016/j.cscee.2025.101261","url":null,"abstract":"<div><div>The widespread presence of BPA in water bodies poses significant environmental and health concerns, highlighting the need for sustainable and efficient removal technologies. This study presents an innovative approach for BPA remediation using biochar derived from king coconut shells—a readily available agricultural waste and by-product of a popular drink in many parts of Asia. Biochar pyrolyzed at 800 °C exhibited the highest removal efficiency, which was significantly enhanced to 80.1 ± 0.9 % following HCl activation. Further reduction of the particle size from 1.0–4.0 mm to 75–105 μm resulted in complete (100 %) removal of BPA. Batch adsorption experiments revealed optimal removal at pH 3–7, with a dosage of 5.0 g/L and an initial BPA concentration of 100.0 ppm. The adsorption process was best described by the Langmuir isotherm model (R<sup>2</sup> = 0.99), with a maximum capacity of 39.53 mg/g. Kinetic studies demonstrated that the pseudo-second-order model accurately represented the adsorption dynamics, implying chemisorption as the rate-limiting step. Regeneration experiments using ethanol demonstrated the reusability of the adsorbent, maintaining over 79.6 % removal efficiency after five consecutive cycles. These findings highlight the effectiveness of KBC800–HCl as a sustainable and high-performance adsorbent, demonstrating the broader potential of agricultural waste valorization in environmental remediation.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101261"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704504","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

Bio-composites from Nicotiana tabacum stems waste: Exploring cellulose powder content and its impact on physical, mechanical, and thermal properties 烟草茎废弃物生物复合材料：探索纤维素粉含量及其对物理、机械和热性能的影响

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-23 DOI: 10.1016/j.cscee.2025.101262

Nasmi Herlina Sari, Emmy Dyah Sulistyowati, Suteja, Muhammad Zulfadli

{"title":"Bio-composites from Nicotiana tabacum stems waste: Exploring cellulose powder content and its impact on physical, mechanical, and thermal properties","authors":"Nasmi Herlina Sari, Emmy Dyah Sulistyowati, Suteja, Muhammad Zulfadli","doi":"10.1016/j.cscee.2025.101262","DOIUrl":"10.1016/j.cscee.2025.101262","url":null,"abstract":"<div><div><strong>This study aims to develop and evaluate sustainable bio-composites using cellulose powder derived from</strong> <em>Nicotiana tabacum</em> <strong>stem waste, focusing on how varying filler content influences their structural, mechanical, and thermal properties.</strong> The cellulose powder was extracted through 5 % NaOH treatment and incorporated at various weight fractions to form composite formulations: BTN (10/90), BTL (15/85), BTK (20/80), BTI (25/75), BTH (30/70), and BTD (40/60), where the numbers represent the cellulose/resin ratio (% w/w). The composites were fabricated using hot press molding and evaluated for physical, mechanical, and thermal properties. Results showed that increasing cellulose content significantly enhanced performance. The highest tensile strength was achieved at 159.47 ± 11.49 MPa for the BTD composite (40 % cellulose), representing a substantial improvement over lower filler loadings. Flexural strength similarly peaked at 174.92 ± 8.9 MPa, and thermal stability increased, with a decomposition onset near 380 °C. FTIR analysis confirmed the presence of cellulose-related functional groups and improved interfacial bonding, while SEM images revealed reduced voids and better dispersion at higher filler contents. The wear resistance also improved, with the lowest wear rate of 0.073 mm<sup>3</sup>/Nm observed for BTD. These findings underscore the potential of <em>Nicotiana tabacum</em>-based composites as eco-friendly materials for structural and thermal applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101262"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703934","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

Silicone quaterium-22 surfactant as an eco-friendly carbon steel anticorrosive: Assessment of corrosion inhibition properties and ecotoxicity in zebrafish embryos 有机硅季铵盐-22表面活性剂作为环保碳钢防腐材料：斑马鱼胚胎的缓蚀性能和生态毒性评价

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-23 DOI: 10.1016/j.cscee.2025.101266

Abdullah A. Shaito , Nadin Younes , Sahar I. Daas , Al-Dana Dosari , Dana Nasrallah , Salma Younes , Mostafa H. Sliem , Aboubakr M. Abdullah , Gheyath K. Nasrallah

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Sustainable utilization of palm oil industry by-products for livestock feed: A digestibility and environmental assessment 棕榈油工业副产品对牲畜饲料的可持续利用：消化率和环境评价

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-22 DOI: 10.1016/j.cscee.2025.101263

Arif Dwi Santoso , Evi Sribudiani , Atien Priyanti , Dwi Yulistiani , Hotmatua Daulay , Rahmania Hanifa , I Gusti Ayu Putu Mahendri , Priyono , Umi K. Yaumidin , Arsyadi Ali , Edi Erwan , Dudi Iskandar , Ira Nurhayati Djarot

{"title":"Sustainable utilization of palm oil industry by-products for livestock feed: A digestibility and environmental assessment","authors":"Arif Dwi Santoso , Evi Sribudiani , Atien Priyanti , Dwi Yulistiani , Hotmatua Daulay , Rahmania Hanifa , I Gusti Ayu Putu Mahendri , Priyono , Umi K. Yaumidin , Arsyadi Ali , Edi Erwan , Dudi Iskandar , Ira Nurhayati Djarot","doi":"10.1016/j.cscee.2025.101263","DOIUrl":"10.1016/j.cscee.2025.101263","url":null,"abstract":"<div><div>The palm oil industry generates substantial by-products with potential as alternative livestock feed. This study evaluated the digestibility and environmental impacts of two feed formulations: one combining oil palm fronds, solid decanter, and palm kernel cake, and another using oil palm fronds, palm kernel cake, and grated sago. Digestibility was assessed via the total collection method, while environmental performance was measured through openLCA 2.0 software, employing the CML-IA method with the Ecoinvent 3.8 database. The sago-based feed showed higher digestibility (65.71 %) but a poorer feed conversion ratio (16.81), primarily due to higher dry matter intake that increased overall feed consumption without a proportional gain in weight. Conversely, the solid decanter-based feed achieved better feed conversion ratio (11.53) but higher carbon emissions (223.415 kg CO<sub>2</sub>-eq/ton) compare with sago feed (197.243 kg CO<sub>2</sub>-eq/ton). In both feed formulations, feedstock mixing was identified as the dominant emission source, contributing over 99 % of total GHG emissions. These findings highlight trade-offs between nutritional efficiency and sustainability, emphasizing the need for low-impact ingredients and improved processing to optimize feed production.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101263"},"PeriodicalIF":0.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723147","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

Fuel potential of bio-oil from co-pyrolysis of fresh palm fruit bunches and waste cooking oil sludge: composition, fuel properties, and carbon distribution analysis 新鲜棕榈果束和废烹饪油泥共热解生物油的燃料潜力：组成、燃料特性和碳分布分析

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-19 DOI: 10.1016/j.cscee.2025.101265

Nathawat Unsomsri , Khanes Chunyok , Watcharapol Pakdee , Phakwan Muncharoenporn , Patchara Koedthong , Sittinun Tawkaew , Songkran Wiriyasart , Sommas Kaewluan

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Ceramic membranes for winery wastewater management: feasibility study and water reuse potential 陶瓷膜用于酒厂废水管理：可行性研究和水再利用潜力

Case Studies in Chemical and Environmental Engineering Pub Date : 2025-07-19 DOI: 10.1016/j.cscee.2025.101259

Vanessa E. Mendes , Fábio Pereira , Marisa Rio , Carlos V. Miguel , Bruno M. Esteves

{"title":"Ceramic membranes for winery wastewater management: feasibility study and water reuse potential","authors":"Vanessa E. Mendes , Fábio Pereira , Marisa Rio , Carlos V. Miguel , Bruno M. Esteves","doi":"10.1016/j.cscee.2025.101259","DOIUrl":"10.1016/j.cscee.2025.101259","url":null,"abstract":"<div><div>The wine industry faces growing water management challenges due to climate change-induced droughts worldwide. Winery wastewater, with varying organic loads across vintage periods, acidity, phenolic compounds, and trace pesticides, present significant environmental and operational challenges for producers. This study explores winery wastewater reclamation as a sustainable strategy, with ceramic membrane filtration offering a robust and scalable solution. Ultrafiltration (10 nm) was identified at bench-scale as the most effective, reducing chemical oxygen demand by 76 % (from an initial 20–56 mg L<sup>−1</sup>) and eliminating <em>E. coli</em>, meeting Portuguese reuse standards. For small to medium wineries, a compact unit (2.3 m<sup>2</sup> of membrane filtration area) can supply 500 L h<sup>−1</sup> of treated water, meeting daily needs for cleaning operations or irrigating up to 3.4 ha of vineyard or green spaces. By reducing freshwater demand, ceramic membranes contribute to enhanced climate resilience and sustainable water management in the wine sector.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101259"},"PeriodicalIF":0.0,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680200","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