Sustainable Chemistry for the Environment最新文献

{"title":"Synthesis, structure, and photocatalytic properties of a Cu(II) coordination polymer derived from a flexible tripodal linker","authors":"Samiksha ,&nbsp;Gunjan Rajput ,&nbsp;Bhavesh Parmar ,&nbsp;Abhishek Dadhania ,&nbsp;Vera Isaeva ,&nbsp;Ravinder Kumar ,&nbsp;Kamal Kumar Bisht","doi":"10.1016/j.scenv.2025.100277","DOIUrl":"10.1016/j.scenv.2025.100277","url":null,"abstract":"<div><div>A copper coordination polymer, {[Cu(TIB)₂(H₂O)₂].Cl₂(H₂O)₂}_n (<strong>CP1</strong>) involving a tripodal N-donor, 1,3,5-tris((1H-imidazol-1-yl)methyl)benzene (TIB) ligand has been synthesized by environmentally friendly methods and structurally characterized. <strong>CP1</strong> exists as a 1D coordination polymer in which the Cu(II) ions possess a distorted octahedral coordination environment provided by N atoms from the four TIB ligands constituting the square base and O atoms from two coordinated water molecules occupying the axial coordination sites. The packing and hydrogen bonding interaction of <strong>CP1</strong> revealed that the centrosymmetric metal-organic strands are involved in intermolecular hydrogen bonding in the formation of 3D network <em>via</em> O-H···N, O-H···Cl and π···π interactions. <strong>CP1</strong> also features a [(H₂O)₂Cl₂] cluster running down the <em>c-</em>axis, <em>i.e.</em>, parallel to the metal-organic strands, [Cu(TIB)₂(H₂O)₂]_n. <strong>CP1</strong> is characterized by single-crystal X-ray diffraction and other physico-chemical techniques. Photocatalytic activity of <strong>CP1</strong> for the decomposition of aqueous Aniline Blue (AB) in the presence of 1 M hydrogen peroxide under the LED illumination was examined and showed approximately 62 % dye degradation in 135 min.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100277"},"PeriodicalIF":0.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654990","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":"Eco-efficient synthesis of cinnamic-compounds as antifouling additives for marine coatings","authors":"Analía Paola ,&nbsp;Ángel Sathicq ,&nbsp;Míriam Pérez ,&nbsp;Gustavo Romanelli ,&nbsp;Guillermo Blustein","doi":"10.1016/j.scenv.2025.100275","DOIUrl":"10.1016/j.scenv.2025.100275","url":null,"abstract":"<div><div>Marine pollution in ports caused by biocides-based antifouling paints is a growing problem worldwide. In this paper we present a new sustainable alternative to reduce the use of copper and booster biocides in marine antifouling paints. In this way, five cinnamic acids and four alkyl-cinnamates were synthesized using eco-efficient procedures within the guidelines of sustainable chemistry. Experimental marine paints were formulated with these compounds and their antifouling performance was evaluated after 90 days of immersion in Mar del Plata harbor. Ecotoxicity-test on <em>Artemia salina</em> nauplii was also performed. Field and laboratory results indicate that 3,4,5-trimethoxycinnamic acid and isobutyl-cinnamate are promising additives for marine paints.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100275"},"PeriodicalIF":0.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631392","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":"A review on effect of operational parameters for the degradation of azo dyes by some advanced oxidation processes","authors":"John Elisa Kumar,&nbsp;Mihir Kumar Sahoo","doi":"10.1016/j.scenv.2025.100274","DOIUrl":"10.1016/j.scenv.2025.100274","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Azo dyes are widely used in industries such as textiles and paper, but their complex molecular structures make them resistant to conventional wastewater treatments. Advanced oxidation processes (AOPs) have emerged as efficient alternatives by generating highly reactive radicals for effective degradation. These processes are based on the generation of highly reactive oxidative species, such as hydroxyl radicals and sulphate radicals, for the destruction of the toxic organic pollutants into carbon dioxide, water, and inorganic salts. This study reviews AOPs such as Fenton and Fenton-like processes, UV photolysis, and photo-Fenton methods for azo dye degradation. The Fenton process (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) produces hydroxyl radicals at an optimal pH of ∼3, while the Fenton-type process (&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;/&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;8&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) generates sulfate radicals with higher oxidation potential (2.5–3.1 V). UV-assisted processes enhance oxidation by accelerating radical formation. Photo-Fenton and photo-Fenton-type processes integrate UV light to improve &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; regeneration, minimizing sludge formation and increasing efficiency. The efficiency of this process does not depend on a single parameter but on numerous parameters such as the concentration of the oxidant, catalyst doses, pH, treatment period, etc., to attain maximum removal of contaminants. Therefore, it becomes very challenging for the researchers to design an effective and efficient process under suitable operational parameters for the treatment processes. Excess oxidants cause radical scavenging, while inorganic anions (&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Cl&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;CO&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;HCO&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;PO&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;) can inhibit degradation. Temperature (∼25–30°C) affects reaction rates, while excess &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; can lead to sludge formation. Given their economic feasibility and environmental sustainability, AOPs offer a promising solution for mitigating dye pollution and improving wastewater treatme","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100274"},"PeriodicalIF":0.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662405","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":"Morphology influence on charge carrier dynamics in photocatalytic CO2 conversion: Comparative analysis between TiO2 nanopowder and nanofibers","authors":"Karan Gehlot ,&nbsp;Anil Chandra Kothari ,&nbsp;Sangeeta Tiwari ,&nbsp;Rajaram Bal ,&nbsp;Sandeep Kumar Tiwari","doi":"10.1016/j.scenv.2025.100272","DOIUrl":"10.1016/j.scenv.2025.100272","url":null,"abstract":"<div><div>Climate change and greenhouse gas emissions have sparked interest in developing efficient CO₂ conversion technology. Photocatalytic CO₂ conversion, using semiconductor materials like Titanium dioxide (TiO₂), has shown promise through solar-powered processes. The efficiency of these photocatalysts depends on understanding charge carrier dynamics. Our study compares the charge carrier kinetics in photocatalytic CO₂ conversion between TiO₂ nanopowder (TiO₂-NP) and TiO₂ nanofibers (TiO₂-NFs). The study uses advanced experimental techniques SEM, XRD, BET, Raman and UV-Vis spectroscopy to analyze the structural and morphological properties of TiO₂ nanopowder and nanofibers, demonstrating their various morphologies. The results show significant differences between the two materials, TiO₂ nanofibers have reduced recombination rates and longer lifetimes due to enhanced charge separation and increased surface-to-volume ratio. TiO₂ nanopowder's increased crystallinity and larger grain size make it harder to segregate charges, leading to shorter lifetimes and higher recombination rates. As result, distinct peaks were seen in the HPLC study of CO₂ conversion over the catalysts for methanol and ethanol with enhanced yield of 182.8 and 216.0 mcg/l respectively for nanofibers. These findings could guide the design and optimization of TiO₂-based photocatalysts for effective CO₂ conversion.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100272"},"PeriodicalIF":0.0,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631391","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":"Production of bioethanol and aroma compounds from pretreated coffee shell and coffee silverskins with binary and ternary deep eutectic solvents","authors":"Prapakorn Tantayotai ,&nbsp;Elizabeth Jayex Panakkal ,&nbsp;Charoen Trisomboon ,&nbsp;Thanyarat Singphrom ,&nbsp;Suchata Kirdponpattara ,&nbsp;Santi Chuetor ,&nbsp;Nagaraju Kottam ,&nbsp;Widya Fatriasari ,&nbsp;Yu-Shen Cheng ,&nbsp;Malinee Sriariyanun","doi":"10.1016/j.scenv.2025.100276","DOIUrl":"10.1016/j.scenv.2025.100276","url":null,"abstract":"<div><div>Coffee shells and silverskins, which are underutilized by-products of the coffee processing industry, offer the potential for value-added products. This study investigated the use of binary and ternary deep eutectic solvents (DESs), choline chloride/oxalic acid (Chcl/OA), and choline chloride/oxalic acid/glycerol (Chcl/OA/Gly), respectively, to pretreat these residues to enhance efficiencies of downstream processes. Optimization experiments identified the optimal pretreatment conditions for coffee shells at 173 min, 120 °C, and 13.99 % and 15.76 % solid loading for binary and ternary DES, respectively. For coffee silverskins, 180 min, 120 °C, and 10 % and 10.21 % solid loadings were found to be optimal. Ternary DES pretreatment enriched the cellulose content and removed hemicellulose and lignin. Enzymatic hydrolysis after pretreatment yielded a two-fold increase in glucose for coffee shells (205.55 mg/g raw biomass) with binary DESs and for coffee silverskins (179.14 mg/g raw biomass) with ternary DESs. Fermentation with <em>Saccharomyces cerevisiae</em> and <em>Kluyveromyces marxianus</em> increased ethanol yields by up to 75 % for coffee shells and 77 % for coffee silverskins. The maximum yields of ethanol production of 33.29 g/L and 32.05 g/L, respectively, were obtained from coffee shells and silverskins, respectively, by using <em>K. marxianus</em>. Volatile aroma compounds, including phenylethyl alcohol and ethyl acetate, were produced during fermentation, indicating potential applications in food and cosmetics. The ternary DES demonstrated superior performance in the recovery of the cellulose content and improvement of ethanol yield, warranting further research to optimize volatile compound production for industrial use.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100276"},"PeriodicalIF":0.0,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654988","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":"Bio-fabricated CuO nanoparticles using Rhinacanthus nasutus leaf extract for antimicrobial and photocatalytic facets","authors":"M. Aswin ,&nbsp;Prammitha Rajaram ,&nbsp;Ambrose Rejo Jeice","doi":"10.1016/j.scenv.2025.100273","DOIUrl":"10.1016/j.scenv.2025.100273","url":null,"abstract":"<div><div>The increasing contamination of water sources poses a serious threat to clean water availability. Photocatalytic degradation offers a sustainable solution for wastewater treatment by utilizing light energy to break down pollutants without generating secondary waste. In this study, <em>Rhinacanthus nasutus</em> leaf extract serves as a green reducing and stabilizing agent for the eco-friendly synthesis of CuO bio-nanoparticles (BNPs). The bioactive compounds in the extract facilitate NPs formation while enhancing stability and functional properties. Various characterization techniques, including XRD, UV-Vis spectroscopy, FTIR, SEM-EDX, micro-Raman, and HRTEM analysis, were employed. The bio-fabricated CuO BNPs as monoclinic in crystalline structure with 19 nm size, and 1.61 eV band gap energy of CuO BNPs via UV–vis spectra and irregular spherical shape in morphology were found. The findings of the antimicrobial investigation demonstrated that the CuO BNPs caused the zones that were inhibitors to microorganisms as <em>S. aureus, E. coli</em> and <em>A. flavus</em>. Against three cationic dyes, Methylene Blue, Brilliant Green, and Rhodamine B, CuO NPs demonstrated photocatalytic activity, reaching degradation efficiencies of 92.86 %, 92.83 %, and 93.44 %, respectively.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100273"},"PeriodicalIF":0.0,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704452","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":"Production and valorization of acetic acid from lignocellulosic biomass pyrolysis: Influence of operational conditions and membrane separation processes","authors":"Adama Ndao,&nbsp;Ghita Bennani,&nbsp;Delon Konan,&nbsp;Amadou Diop,&nbsp;Kokou Adjallé","doi":"10.1016/j.scenv.2025.100268","DOIUrl":"10.1016/j.scenv.2025.100268","url":null,"abstract":"<div><div>Pyrolysis of lignocellulosic biomass is a thermochemical route for transforming forest and agricultural residues into valuable products. Among these, acetic acid is particularly important given its broad industrial applications in vinyl polymers, agrochemicals, and food additives. However, effectively recovering acetic acid from the aqueous fraction (fast pyrolysis) or wood vinegar (slow pyrolysis) of pyrolytic oils remains a challenge. This review summarizes the principal factors affecting acetic acid yield during fast pyrolysis, including feedstock composition (cellulose and hemicellulose), moisture content, temperature, particle size, reactor type, and residence time. Approaches such as mild pretreatments and optimized catalytic conditions can further enhance the release of acetyl groups from hemicellulose, thus raising acetic acid production. Recent advances in separation methods emphasize membrane technologies like nanofiltration (NF) and reverse osmosis (RO). These processes provide high selectivity, energy efficiency, and a reduced environmental footprint compared to traditional techniques such as liquid-liquid extraction and vacuum evaporation. Operational parameters—such as transmembrane pressure, pH, and feed composition—influence both membrane flux and retention of acetic acid. Interactions among solutes, membrane materials, and process conditions can either facilitate or hamper selective acetic acid recovery. This review highlights the potential to integrate optimized pyrolysis parameters with robust membrane systems to achieve sustainable acetic acid production. Ongoing research focuses on improving the acid resistance of membrane materials and elucidating mass transport mechanisms for scale-up. Successful implementation of these technologies will help establish a circular bioeconomy by converting lignocellulosic residues into high-value chemicals.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100268"},"PeriodicalIF":0.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665556","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":"Efficient photocatalytic degradation of azo dyes using Achyranthes aspera-mediated magnetic iron oxide nanoparticles: A green synthesis approach","authors":"Falguni Deshmukh ,&nbsp;Khushi Kiran ,&nbsp;Sarika Vishnu Pawar ,&nbsp;Neelu Nawani ,&nbsp;Patrycja Golińska ,&nbsp;Aniket Gade ,&nbsp;Pramod Ingle ,&nbsp;Swapnil Chandrakant Gaikwad","doi":"10.1016/j.scenv.2025.100269","DOIUrl":"10.1016/j.scenv.2025.100269","url":null,"abstract":"<div><div>Environmental pollution, particularly from industrial effluents, has become a warning to human well-being owing to its hazardous effects. The discharge of harmful organic dyes, chlorinated organic pollutants, and toxic heavy metals into water bodies demands efficient and sustainable remediation solutions. In this context, one promising solution is to explore biologically synthesized magnetic nanoparticles, which provide an eco-friendly, cost-economical, and ease of significant production alternative for wastewater treatment. In the current study, iron nanoparticles oxide (AaIONPs) with remarkable magnetic properties were successfully produced by exploring a bio-reduction technique, utilizing an aqueous leaf extract of <em>Achyranthes aspera</em> (Apamarg) serving as a natural reducing and capping agent. The phytosynthesized AaIONPs were characterized through X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Zeta analysis, Energy dispersive X-ray spectroscopy and Nanoparticle Tracking Analysis (NTA) to observe various properties of nanoparticles. The average diameter varied from 5 nm and 60 nm. The photocatalytic dye degradation efficiency was assessed using UV Vis absorption spectroscopy. For five retrieval cycles, the magnetic AaIONPs showed 90 % and 95 % decolorization efficiency against Methylene Blue (MB) and Crystal Violet (CV). Altogether, these findings highlight that green synthesized AaIONPs using <em>A. aspera</em> leaf extract are not only effective in the degradation of toxic organic pollutants but also reusable, making these nanoparticles a sustainable candidate for wastewater treatment, which in turn controls environmental pollution.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100269"},"PeriodicalIF":0.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144678814","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":"Experimental and theoretical investigations of the corrosion protection of mild steel by methanolic Triumfetta rhomboidea J. leaf extract","authors":"Bamidele E. Agbaffa ,&nbsp;Emmanuel F. Olasehinde ,&nbsp;Matthew A. Adebayo ,&nbsp;Ebun-Oluwa P. Oladele ,&nbsp;Adebola I. Akinjokun ,&nbsp;Idowu J. Esho","doi":"10.1016/j.scenv.2025.100270","DOIUrl":"10.1016/j.scenv.2025.100270","url":null,"abstract":"<div><div><em>Triumfetta rhomboidea</em> leaf extract (TRLE) was used as a natural and benign corrosion inhibitor of mild steel (MS) in HCl (1 mol/L) by gravimetric, electrochemical and theoretical techniques. Identification of the major compounds in TRLE was conducted on a Gas Chromatography-Mass Spectrophotometer (GC-MS). Theoretical calculations were done and the relationship between the experimental inhibition efficiencies and quantum chemical parameters were obtained. The parameters of thermodynamic equations (<em>K</em>_<em>ads</em>; <em>E</em>_<em>a</em>; <span><math><mrow><mi>Δ</mi><msubsup><mrow><mi>G</mi></mrow><mrow><mi>a</mi><mi>d</mi><mi>s</mi></mrow><mrow><mi>o</mi></mrow></msubsup></mrow></math></span>; <span><math><mrow><mi>Δ</mi><msubsup><mrow><mi>S</mi></mrow><mrow><mi>a</mi><mi>d</mi><mi>s</mi></mrow><mrow><mi>o</mi></mrow></msubsup></mrow></math></span>; <span><math><mrow><mi>Δ</mi><msubsup><mrow><mi>H</mi></mrow><mrow><mi>a</mi><mi>d</mi><mi>s</mi></mrow><mrow><mi>o</mi></mrow></msubsup></mrow></math></span>) were calculated and explained. The potential of inhibition of TRLE increased as the concentration of the TRLE increased but reduced with temperature increase. The adsorption of TRLE on the MS surface followed the Langmuir isotherm model. It was revealed that corrosion inhibition may be due to the spontaneous physical adsorption of the TRLE molecules on the surface of the MS. The respective polarisation and impedance data indicated that TRLE is a mixed-type inhibitor and the inhibition mechanism is due to charge-transfer. Scanning electron microscopy-energy dispersive X-ray analytical methods confirmed that TRLE protected the surface of MS and reduced the dissolution of the MS in the acidic solution. The GC-MS data revealed that octadecanoic acid and 9-actadecenoic acid were the most abundant compounds in TRLE and thus, were selected for quantum and molecular dynamics simulation. The theoretical predictions were in good agreement with experimental results.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100270"},"PeriodicalIF":0.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654989","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":"Dye-laden sludge-derived biochar for wastewater remediation: A review on pyrolytic engineering, adsorptive interactions, and environmental prospects","authors":"Anshuman Gupta ,&nbsp;Sandra Ramachandran ,&nbsp;Neelaambhigai Mayilswamy ,&nbsp;Amrita Nighojkar ,&nbsp;Balasubramanian Kandasubramanian","doi":"10.1016/j.scenv.2025.100271","DOIUrl":"10.1016/j.scenv.2025.100271","url":null,"abstract":"<div><div>The persistent release of synthetic dyes from industrial effluents constitutes a substantial ecological and toxicological hazard owing to their persistent molecular structure and biological recalcitrance. This review presents a focused evaluation of biochar derived from dye-laden sewage sludge (DLSS-B), highlighting its potential as a low-cost, sustainable adsorbent for dye removal from wastewater. DLSS, a byproduct rich in organic matter, inorganic minerals, and residual dyes, is thermochemically converted into biochar through pyrolysis. A critical assessment is conducted on how variations in pyrolysis temperature, thermal ramping rate, and inert gas environment influence the resultant biochar’s specific surface area (reaching up to 405 m²/g), pore architecture, and surface functional chemistry. DLSS-B exhibits high adsorption capacities ranging from 200 to 405 mg/g for dyes such as malachite green and crystal violet, primarily through π–π stacking, electrostatic interactions, and hydrogen bonding. Chemical modifications, including acid/alkali activation and metal doping, further enhance its adsorptive performance. Regeneration studies show that DLSS-B can retain up to 92 % efficiency over five cycles, indicating strong reusability. Beyond dye removal, secondary applications such as soil amendment (non-food use) and energy recovery (∼20 MJ/kg) are discussed. This review emphasizes the integrated role of pyrolysis engineering, surface chemistry, and reuse strategies in developing DLSS-B as a viable material for industrial dye remediation.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"11 ","pages":"Article 100271"},"PeriodicalIF":0.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595735","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}