Journal of chemical technology and biotechnology最新文献

{"title":"Ibuprofen removal by modified natural zeolite: characterization, modeling, and adsorption mechanisms","authors":"Anna Carla Ribeiro,&nbsp;Wardleison Martins Moreira,&nbsp;Bruna Bruguer Ferri,&nbsp;Débora dos Federici Santos,&nbsp;Mara Heloisa Neves Olsen Scaliante,&nbsp;Elizabeth de da Costa Neves Fernandes Almeida Duarte,&nbsp;Rosângela Bergamasco","doi":"10.1002/jctb.7729","DOIUrl":"10.1002/jctb.7729","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Developing robust technologies to remove emerging pollutants from water is urgent since conventional treatments are not technically prepared to remove them. This paper investigated the ibuprofen (IBU) adsorption capacity onto natural zeolite (NZ) and hydrothermally modified zeolite in an acidic medium followed by impregnation with the cationic surfactant cetyltrimethylammonium bromide (CTAB) (MZ_HT-CTAB). The materials characterization included scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic absorption spectroscopy (AAS), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA/DTG), N₂ adsorption/desorption isotherm (BET), Zeta Potential (ZP), and Point of Zero Charge (pH_PZC). The adsorptive capacity studies were carried out by varying the pH solution, a kinetic study at three concentrations (25, 50, and 100 mg L⁻¹), and the contaminant concentration influence (5–100 mg L⁻¹).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The results showed that the MZ_HT-CTAB obtained both the highest removal efficiency (~ 37%) and the highest adsorption capacity (~ 14 mg g⁻¹) at pH 5.0. The Pseudo Second-Order (PSO) model, which showed the best fit to the experimental data, is significant as it indicates the reliability of our results. The maximum adsorption capacity for the concentration of 100 mg L⁻¹ was 11.93 mg g⁻¹. According to Giles's classification, the isotherm was classified as S-3 type, indicating the competition between the adsorbate and water molecules for the active sites on the adsorbent surface.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The adsorption studies demonstrate that the novel adsorbent (MZ_HT-CTAB) is highly effective in removing IBU, presenting a significant removal capacity and feasibility. This promising result contributes to the ongoing search for alternative materials for water treatment. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2407-2419"},"PeriodicalIF":2.8,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ferrate(VI) green oxidant: electrochemical generation, self-decomposition, and application for reactive red 195 azo dye treatment","authors":"Thi Van Anh Nguyen,&nbsp;Thi Thanh Thuy Mai,&nbsp;Thi Binh Phan,&nbsp;Huu Quang Tran,&nbsp;Minh Quy Bui","doi":"10.1002/jctb.7734","DOIUrl":"10.1002/jctb.7734","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Ferrate(VI), an environmentally friendly oxidant, has recently emerged as one of the most promising chemicals for water and wastewater treatment due to its versatile application as an oxidant, coagulant, and disinfectant. In this paper, the factors affecting the electrosynthesis process of ferrate using ductile iron anode were studied. Besides, the obtained ferrate was used to remove reactive red 195 (RR195).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The optimal ferrate electrochemical synthesis conditions were determined, including 14 mol L⁻¹ NaOH electrolyte solution, a current density of 40 mA cm⁻², and electrolysis time of approximately 5–6 h. Furthermore, the kinetics of the ferrate's self-decomposition reaction was also studied at different temperatures. The decomposition process of ferrate in a 14 mol L⁻¹ NaOH environment followed second-order kinetics, with reaction rate constants of 4.70 × 10⁻⁹, 7.31 × 10⁻⁸, 1.95 × 10⁻⁷, and 4.70 × 10⁻⁷ (L mol⁻¹ s⁻¹) at temperatures of 4, 10, 20, and 30 °C, respectively. RR195 treatment efficiency by ferrate reached 96.3% in a short time of 3 min at pH 3 with a ferrate/RR195 molar ratio of 30/1.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study identified the optimal conditions for the electrochemical synthesis of ferrate using a ductile iron anode. Ferrate was stable at a low temperature of 4 °C, so unused ferrate needs to be stored at low temperatures to avoid decomposition of ferrate. The ferrate green oxidant demonstrated high efficiency in the treatment of RR195 in a short time. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2454-2463"},"PeriodicalIF":2.8,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Textile waste pretreatment for anaerobic digestion: a review and technology feasibility study","authors":"Naveenrajah Tharmarajah,&nbsp;Kaveh Shahbaz,&nbsp;Saeid Baroutian","doi":"10.1002/jctb.7728","DOIUrl":"10.1002/jctb.7728","url":null,"abstract":"<p>The increasing volume of textile waste in landfills and incineration poses severe environmental challenges. Waste valorisation of textile waste via anaerobic digestion (AD) is preferable, as it offers economic and environmental benefits, but it is hindered by textile complexity, necessitating effective pretreatment technologies to improve biogas production. This study aims to evaluate various pretreatment technologies for biogas production from textile fibres via AD. A weighted-scoring analysis (WSA) assessed pretreatment methods based on technical, economic, environmental and operational criteria. Hydrothermal pretreatment emerged as the most technically effective method, scoring 140 owing to its substantial methane enhancement. Economically, shredding was the most viable option, scoring 125, as a consequence of low capital and O&amp;M cost. Environmentally, hydrothermal and deep eutectic solvent (DES) pretreatments were top performers with 100 points owing to low environmental impact and positive heat reactions. In a case study conducted in the Auckland region, the potential environmental impact (PEI) obtained from hydrothermal and DES were 169 and 92 per year, respectively, resulting in minimal environmental impact. Operationally, ultrasonic and biological pretreatments scored highest owing to their ease of operation, and minimal health and safety requirements. Overall, hydrothermal pretreatment achieved the highest WSA score of 340, reflecting its balanced performance across all criteria. Hydrothermal pretreatment is the most promising technology for enhancing biogas production from textile waste. Its technical efficiency, economic feasibility and environmental benefits regarding the WSA score make it suitable for upscaling and providing a viable solution for managing textile waste in the AD plant. © 2024 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2213-2227"},"PeriodicalIF":2.8,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7728","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring enhanced syngas production via the catalytic performance of metal-doped X-Ni/CeO2 (X = Zr, La, Sr) in the dry reforming of methane","authors":"Wan Nabilah Manan,&nbsp;Wan Nor Roslam Wan Isahak,&nbsp;Zahira Yaakob,&nbsp;Salma Samidin,&nbsp;Khairul Naim Ahmad,&nbsp;Mohd Nor Latif,&nbsp;Ali Faris Aldoghachi,&nbsp;Yun Hin Taufiq-Yap","doi":"10.1002/jctb.7732","DOIUrl":"https://doi.org/10.1002/jctb.7732","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>The quest to manufacture large amounts of syngas to bridge fossil fuels and the renewable energy ecosystem stimulates the creation of efficient and stable heterogeneous catalysts. The NiCeO₂ catalysts, synthesized via ultrasonic-assisted citric acid complexation, are highly efficient for the dry reforming of methane (DRM) reaction. Different promoter metals (Zr, La and Sr) were tested for catalytic performance and syngas production. A range of analyses, including X-ray diffraction (XRD), N₂ physisorption, H₂ temperature-programmed reduction, CO₂ temperature-programmed desorption, field emission scanning electron microscopy (FESEM), transmission electron microscopy and X-ray photoelectron spectroscopy, were employed to characterize the physicochemical properties of the catalysts.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>XRD results indicated the formation of NiO, CeO₂, solid solution ceria–zirconia, perovskite LaNiO₃ and SrNiO₃ crystalline phases. FESEM results showed the promoted catalysts (Zr, La, Sr) produce large pores to facilitate reactant diffusion, with zirconia specifically creating a spiderweb morphology. At 800 °C, the CH₄ and CO₂ conversions follow the sequence of NiCeO₂ catalyst (CH₄ = 54%, CO₂ = 45%) &lt; Sr/NiCeO₂ (CH₄ = 60%, CO₂ = 67%) &lt; La/NiCeO₂ (CH₄ = 85%, CO₂ = 84%) &lt; Zr/NiCeO₂ (CH₄ = 95%, CO₂ = 87%). The integration of promoters in DRM catalysts has notably improved carbon formation resistance, as evidenced by the following ranking: Zr/NiCeO₂ (5.1 wt%) &lt; commercial catalyst (6.0 wt%) &lt; La/NiCeO₂ (7.85 wt%) &lt; Sr/NiCeO₂ (10.9 wt%) &lt; NiCeO₂ (11.3 wt%).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This study demonstrates that incorporating promoters, particularly Zr, in NiCeO₂ significantly enhances resistance to carbon formation. It offers valuable insights into selecting metal catalyst promoters for excellent catalytic performance in DRM. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2420-2433"},"PeriodicalIF":2.8,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of magnetic bimetallic oxide-decorated attapulgite-based adsorbents for arsenic ion adsorption","authors":"Bo Yu,&nbsp;Xiaoning Li,&nbsp;Jiao Ma,&nbsp;Han Yan,&nbsp;Ke Lian,&nbsp;Pengfei Shen","doi":"10.1002/jctb.7727","DOIUrl":"10.1002/jctb.7727","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Arsenic contamination can exert severe detrimental effects on the ecological environment and human health. It can cause acute or chronic poisoning, resulting in cell distortion or cancer when humans come into contact with or consume arsenic-containing water. Adsorption technology is one of the effective methods for arsenic removal. In this study, using attapulgite (ATP) as a support for bimetallic iron–manganese oxides, a series of adsorbents (Fe-Mn/ATP) with different manganese-to-iron molar ratios were prepared via the coprecipitation method. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy mapping, X-ray diffraction and zeta potential measurements were used to analyze the structure and properties of Fe-Mn/ATP. In addition, the adsorption performance of the material for arsenic ions was investigated by static adsorption and dynamic adsorption experiments.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>A novel Fe-Mn/ATP adsorbent was prepared using ATP as the raw material and manganese-to-iron molar ratio was 1:3 by coprecipitation at 60 °C for 1 h. The adsorption efficiency of arsenic ions was optimal at an Fe-Mn/ATP dosage of 2 g L⁻¹, pH 4 and a contact time of 10 min, reaching a maximum adsorption capacity of 38.27 mg g⁻¹ at room temperature. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm adsorption model, indicating that arsenic ion adsorption by Fe-Mn/ATP was mainly monolayer chemical adsorption. Furthermore, Fe-Mn/ATP showed a removal rate for arsenic ions of over 80% after four cycles of regeneration, revealing a great potential for practical application.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study offers a promising Fe-Mn/ATP adsorbent for removal of arsenic ions from wastewater. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2395-2406"},"PeriodicalIF":2.8,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141925017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of magnetic photocatalysts from TiO2, Fe(NO3)3 and sucrose and their application for the degradation of model organic contaminants","authors":"Leydiane de Oliveira Pereira,&nbsp;Iara do Rosario Guimarães,&nbsp;Luana Pereira Zampiere,&nbsp;Isabela Sales Marques,&nbsp;Stéfany Gonçalves de Moura,&nbsp;Aline Aparecida Caetano,&nbsp;Fabiano Magalhães","doi":"10.1002/jctb.7725","DOIUrl":"10.1002/jctb.7725","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Photocatalysis is an efficient method for the removal of organic contaminants in wastewater. In this study, different magnetic photocatalysts for the degradation of organic compounds were prepared.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Ti/C/Fe photocatalysts were prepared by supporting TiO₂ (20, 40 and 60% w/w) on a carbon/iron oxide (C/Fe) magnetic carrier. Characterization via Raman spectroscopy, X-ray diffractometry, thermal analysis, X-ray fluorescence, scanning electron microscopy and energy-dispersive X-ray spectroscopy/elemental mapping and magnetic property analysis by vibrating-sample magnetometry confirmed the presence of TiO₂, Fe₃O₄, Fe₃C and char in the photocatalysts as well as their magnetic properties. The results of specific surface area analysis showed that the C/Fe support had a surface area of 183 m² g⁻¹ and that this area decreased with an increasing amount of supported TiO₂, reaching up to 129 m² g⁻¹. Diffuse reflectance spectroscopy characterization revealed that the bandgap values obtained for the photocatalysts (Ti/C/Fe) were lower than 3.2 eV. The prepared photocatalysts showed high efficiency in degrading the contaminants Remazol Black (RB5) (99%), paracetamol (77%) and phenol (90%). Recovery and reuse experiments using RB5 showed that after the fourth reaction, the photocatalytic efficiency was reduced by 50%, and the recovery reached up to 70%. Sedimentation kinetics showed that while only 6% of the TiO₂ was deposited, up to 89% of the photocatalysts were deposited.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>These results indicate that the photocatalysts showed excellent photocatalytic efficiency for different contaminants and can be easily and quickly separated from the reaction medium by magnetic separation. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2366-2380"},"PeriodicalIF":2.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced methane production from protein and lipid-rich wastewater using powdered oat husk-biochar","authors":"Jhosané Pagés-Díaz,&nbsp;Iván Vidal,&nbsp;César Huiliñir,&nbsp;Leslie Hernández-Velez,&nbsp;Junior Lorenzo-Llanes","doi":"10.1002/jctb.7726","DOIUrl":"10.1002/jctb.7726","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Due to the lower degradation and the potential inhibitory compounds present in slaughterhouse wastewater (SW), its industrial applications are often limited to methane production. This study investigated the combined effect of conductive material such as oat husk-biochar at different concentrations (0, 5, 10, 15, 20, 25 g L⁻¹) and particle sizes (i.e., Powder Biochar (PB) (0.05–0.08 mm) <i>vs.</i> Granular Biochar (GB) (0.8–1.0 mm)) in the methane production, biodegradability, kinetic parameters, methanogenic activity and digestate quality of SW, using a multilevel factorial design.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Experimental results showed that lower concentration (5, 10 g L⁻¹) increased the methane yield up to 35% for PB and between 11 and 13% for GB compared to the control reactor. The total ammoniacal nitrogen concentrations in the digestate declined between 14% and 52% for all biochar dosages and particle sizes. PB improved the specific methanogenic activity of the biomass compared with GB, indicating that PB can support a well-balanced methanogenic community compared with GB inside the digester. The multiple response optimization process computed that 7.5 g L⁻¹ of PB is optimal to increase the methane yield, the COD degradation efficiency and shorten the lag phase. On the other hand, doses higher than 15 g L⁻¹ hinder methane generation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>PB supplementation has significant potential to improve the anaerobic degradation of SW. The improvement is attributed to the higher specific surface area, contributing to better support and microbial activity. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2381-2394"},"PeriodicalIF":2.8,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced diclofenac adsorption and degradation using iron-loaded modified spent bleaching earth carbon in the presence of clofibric acid: mechanistic insights and toxicity assessment","authors":"Liwen Zhang,&nbsp;Xue Song,&nbsp;Jie Zhang,&nbsp;Yue Chen,&nbsp;Yongde Liu,&nbsp;Jihong Zhao,&nbsp;Fanbao Deng,&nbsp;Guihua Yan","doi":"10.1002/jctb.7723","DOIUrl":"10.1002/jctb.7723","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The presence of pharmaceutical active substances such as diclofenac (DCF) and clofibric acid (CA) in aquatic environments poses significant ecological threats. Existing treatments have not fully explored the impact of CA on DCF removal efficiency. This research introduces nZVI/CTAB-SBE@C, a novel adsorbent developed from industrial spent bleaching earth (SBE), modified with cetyltrimethylammonium bromide (CTAB) and nano zero-valent iron (nZVI), enhancing both adsorption and degradation of DCF and CA.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>This study investigated the impact of CA on the removal capabilities of nZVI/CTAB-SBE@C for DCF in a coexisting system. Systematic examinations were conducted on the effects of various parameters, including reaction time, dosage, temperature, actual wastewater, humic acid content and coexisting ions. Results indicated that the presence of CA significantly enhanced the DCF removal efficiency, achieving an optimal rate of 87.3% under conditions of reaction time 2 h, adsorbent dosage 5 g L⁻¹ and temperature 25 °C. Moreover, interactions between Al³⁺ ions and the adsorbent matrix notably improved removal efficiencies for both DCF and CA. Analysis revealed that CA facilitated new degradation pathways for DCF, including hydroxylation and decarboxylation reactions. Additionally, the presence of CA reduced the toxicity of degradation intermediates, enhancing environmental safety compared to systems containing only DCF.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study effectively transforms industrial waste into the efficient nZVI/CTAB-SBE@C adsorbent. The presence of CA not only boosts DCF removal efficiency but also promotes its safer degradation, thereby reducing the ecological impact of contaminants. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2339-2350"},"PeriodicalIF":2.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bidirectional extracellular electron transfers in Serratia marcescens and Stenotrophomonas sp. correlate to EPS and Cr(VI) removal in single-chamber bioelectrochemical systems","authors":"Yiying Yan,&nbsp;Qiang Wang,&nbsp;Liping Huang,&nbsp;Xin Xing,&nbsp;Yong Shi,&nbsp;Miao Wang,&nbsp;Gianluca Li Puma","doi":"10.1002/jctb.7724","DOIUrl":"10.1002/jctb.7724","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Electrochemically active bacteria (EAB) capable of bidirectional extracellular electron transfer (EET), either outward or inward EET, largely control the efficiency of interactions and electrical communication between biofilm and electrode and, thus, control the performance of bioelectrochemical systems (BESs) for heavy metals removal. However, the behavior of such metallurgical EAB capable of bidirectional EET has yet to be investigated, and the role of extracellular polymeric substances (EPS) in these switchable EAB with bidirectional EET and in the presence of heavy metals remains unexplored in the single-chamber BESs treating heavy metal-based wastewaters that are limited by carbon/electron sources or electron acceptors.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The biofilms of the Cr(VI)-tolerant EAB <i>Stenotrophomonas sp.</i> YS1 and <i>Serratia marcescens</i> Q1 exhibited bidirectional EET metabolizing either organic (acetate) or inorganic (HCO₃⁻) species with simultaneous removal of Cr(VI) in single-chamber BESs. Q1 inward EET uptake of electrons was more efficient than that of YS1 (165 μA <i>vs.</i> 118 μA); meanwhile, YS1 outward EET was more efficient than Q1 (8.0 μA <i>vs.</i> 4.7–5.2 μA). The adaptive electrochemically-tunable EPS in both biofilm strains was regulated by the direction of the EET (inward or outward) in the presence of Cr(VI) and circuital current.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study demonstrates the switching properties of EAB, such as <i>Stenotrophomonas sp.</i> or <i>S. marcescens,</i> that are capable of bidirectional EET to or from the electrodes, and it displays the regulation of such responses with the amount and compositional diversity of the biofilms’ EPS, giving a comprehensive appreciation of tunable EPS for Cr(VI)-wastewater treatment in single-chamber BESs. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2351-2365"},"PeriodicalIF":2.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leveraging the dynamics of microalgal CO2 capture to estimate the maximum inherent photosynthetic potential","authors":"Satyanarayana Reddy Battula,&nbsp;Ramkrishna Sen","doi":"10.1002/jctb.7720","DOIUrl":"10.1002/jctb.7720","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Natural photosynthesis, utilizing intelligent molecular machinery to harness sunlight, stands as the benchmark for efficient energy generation. Despite its high quantum efficiency compared to synthetic methods, challenges persist due to dynamic nutritional and light requirements in plant, microalgae, and cyanobacteria-driven processes. Reported microalgae CO₂ uptake rates rely on biomass dry cell weight measurement after certain incubation period and systematic study of required CO₂ concentrations for optimal photobioreactor operation remaining unexplored. This research is thus aimed at evaluating the critical dissolved CO₂ (C_crit ∙ CO₂) concentration and specific CO₂ uptake rates (SCUR) of <i>Chlorella minutissima</i> (CM) culture in the presence of surplus light and other nutrients by online monitoring and measuring the dynamic CO₂ uptake rates which will help in maintaining the optimal rate of CO₂ delivery for continuous cultivation of microalgae while minimizing the escape of CO₂.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Dissolved C_crit ∙ CO₂ was determined to be in the range of 16–20 mg/L, and the maximum SCUR in BBM (Bold Basal Medium) was found to be 0.73 mg CO₂ (mg dcw ∙ h)⁻¹. Interestingly, this SCUR value is nearly three times greater than that of the most efficient <i>in vitro</i> artificial photosynthetic novel pathway reported so far.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>From the calculated SCUR values, it may be noted that 9.6 g of biomass can be obtained from 1 g of microalgal inoculum in a day, thereby setting a benchmark for the scientists working in the areas of bioprocess engineering, synthetic biology, and metabolic engineering to comply. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2320-2325"},"PeriodicalIF":2.8,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}