Journal of chemical technology and biotechnology最新文献

{"title":"A novel magnetic bifunctional hydrochar catalyst derived from palm leaf residue for biodiesel production: kinetic and thermodynamic studies","authors":"Muhammad Aliyu,&nbsp;Umer Rashid,&nbsp;Toshiki Tsubota,&nbsp;Wan Azlina Wan Ab Karim Ghani,&nbsp;Mohamad Amran Mohd Salleh,&nbsp;Duy Anh Khuong,&nbsp;Kieu Trang Trinh,&nbsp;Nguyen Trung Duc,&nbsp;Daisuke Tashima,&nbsp;Tomi Ryu","doi":"10.1002/jctb.7792","DOIUrl":"https://doi.org/10.1002/jctb.7792","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Novel magnetic bifunctional hydrochar-based catalysts were produced from activated hydrochar derived from palm leaf residue (PLRAH) via a wet impregnation technique and used to perform one-step waste cooking oil (WCO) transesterification to produce biodiesel. The magnetic bifunctional hydrochar-based catalysts were evaluated for their acid–base properties, crystallinity, functional groups, magnetism, textural properties, thermal stability, chemical composition, and morphology.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The PLRAH-Fe₂O₃/K₂O magnetic catalyst performed well in thermal testing, with a large specific surface area of 111.08 m² g⁻¹ and its high basicity value of 7.34 mmol g⁻¹, as well as an acidity value of 12.67 mmol g⁻¹, significantly contributed to the WCO transesterification. An optimum biodiesel yield of 98.36% was obtained under the following conditions: catalyst loading of 3 wt%, a methanol-to-WCO molar ratio of 12:1, and a reaction temperature of 75 °C for a duration of 4 h and biodiesel yields maintained at &gt;80% after five cycles. The produced biodiesel complied with the physicochemical properties stated in ASTM D6751. The kinetic study also revealed that WCO transesterification using the one-step approach had a pseudo-first order and activation energy (<span></span><math>\u0000 <mrow>\u0000 <msub>\u0000 <mi>E</mi>\u0000 <mi>a</mi>\u0000 </msub>\u0000 </mrow></math>) of 24.27 kJ mol⁻¹. Furthermore, the thermodynamic variables, including Gibbs free energy (∆<i>G</i>^o), enthalpy (∆<i>H</i>^o), and entropy (∆<i>S</i>^o) of WCO transesterification, were found to be 7.60 kJ mol⁻¹, 24.27 kJ mol⁻¹, and −21.78 J mol⁻¹ K, respectively. This suggests that WCO transesterification was an endothermic and non-spontaneous process.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The synthesized magnetic bifunctional hydrochar-based catalyst demonstrated outstanding performance for WCO transesterification, highlighting its potential for efficient biodiesel production. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"530-544"},"PeriodicalIF":2.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397103","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":"Welcoming the new year with Volume 100 of JCTB: challenges and perspectives","authors":"Dionissios Mantzavinos","doi":"10.1002/jctb.7783","DOIUrl":"https://doi.org/10.1002/jctb.7783","url":null,"abstract":"","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 1","pages":"5"},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860948","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":"Extractive rectification using DES for benzene-cyclohexane-cyclohexene ternary azeotropic system","authors":"Wang Haiou,&nbsp;Xu Yang,&nbsp;Sang Weihe,&nbsp;Li Hao,&nbsp;Fang Jing","doi":"10.1002/jctb.7774","DOIUrl":"https://doi.org/10.1002/jctb.7774","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Benzene, cyclohexane, and cyclohexene are ternary azeotropic systems, which cannot achieve high-purity separation by ordinary distillation, but this issue can be solved by extractive distillation. Deep Eutectic Solvents (DES) is a ‘green solvent’ that has emerged in recent years and is often used as an extractant.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In this study, the COSMO-SAC solvation model was used to calculate the infinite dilution activity coefficients (γ∞) of DES with different compositions to screen suitable DES, and the effect was demonstrated by vapor–liquid equilibrium experiment (VLE). In addition, the effect of intermolecular interactions was explored in this study by means of independent gradient (IGM) equivalence plot, and process simulations were carried out by means of Aspen Plus software.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>VLE experiments showed that the combination of DES extractants tetrabutylphosphonium bromide: levulinic acid (1:4) and tetrabutylammonium bromide: cyclobutyl sulfone (1:4) could break the azeotropic relationship of benzene, cyclohexane, and cyclohexene ternary systems. In addition, using Aspen process simulation to compare the screened DES extractant with the industrially used dimethylacetamide (DMAC) extractant, the use of the screened DES extractant was able to reduce the condenser and reboiler energy consumption by 14.93%. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"327-343"},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114019","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":"Comparison between produced Tingui biochar versus commercial Norit in the adsorption of acetaminophen and diclofenac: characterization, batch, and fixed bed system","authors":"Débora Federici dos Santos,&nbsp;Wardleison Martins Moreira,&nbsp;Thiago Peixoto de Araújo,&nbsp;Maria Manuel Serrano Bernardo,&nbsp;Isabel Maria de Figueiredo Ligeiro da Fonseca,&nbsp;Indianara Conceição Ostroski,&nbsp;Maria Angélica Simões Dornellas de Barros,&nbsp;Eduardo Falabella Sousa-Aguiar","doi":"10.1002/jctb.7794","DOIUrl":"https://doi.org/10.1002/jctb.7794","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In pressing environmental challenges, practical solutions to remove organic contaminants from water are paramount. This study undertook a crucial task of comparing two adsorbents: BT-KOH, synthesized from Tingui bark activated with potassium hydroxide, and Norit commercial carbon. The comparison was based on experimental data from adsorption kinetics and isotherm tests in batch and fixed bed systems, targeting the removal of acetaminophen and diclofenac. Physico-chemical characterization analyses of the materials were also conducted to enhance the comparison.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The study's key finding was the superior performance of BT-KOH over Norit in removing acetaminophen and diclofenac. The maximum adsorption capacities for acetaminophen were 357.7 mg g⁻¹ for BT-KOH and 226.3 mg g⁻¹ for Norit. For diclofenac, these values were 250.6 mg g⁻¹ for BT-KOH and 220.9 mg g⁻¹ for Norit. This superiority was attributed to BT-KOH's larger specific surface area and higher quantities of oxygen-containing functional groups.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The result underscores the importance of considering the physical–chemical composition of materials in the quest for more effective and sustainable water treatment methods. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"555-567"},"PeriodicalIF":2.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397162","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":"Anti-fouling loose polyamide nanofiltration membrane preparation by biodegradable sophorolipids for precise separation of simulated dyeing wastewater","authors":"Xin-Xi Ding,&nbsp;Cheng Jiang,&nbsp;Mingguang Li,&nbsp;Xianghong Li,&nbsp;Dan-Dan Shao","doi":"10.1002/jctb.7795","DOIUrl":"https://doi.org/10.1002/jctb.7795","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Strengthening the recycling and utilization of resources is deeply significant in achieving carbon neutrality. The nanofiltration membranes possess separation ability within the nanoscale by utilizing special pore size ranges and surface charge properties, showing great application prospects in resource recycling. The commercial nanofiltration membranes are mainly prepared by interfacial polymerization with fast reaction speed and easy scaling-up advantages. However, the obtained polyamide nanofiltration membranes possess dense selective layers with low permeance and separation efficiency to the molecules. Herein, the biodegradable surfactant sophorolipid was added to the aqueous solution to improve the performance of the polyamide nanofiltration membranes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Compared with the traditional nanofiltration membranes, the permeance of the sophorolipid-modified nanofiltration membrane was improved from 3 to 18 L·m⁻²·h⁻¹·bar⁻¹. The modified membrane showed high rejection of the dyes with large molecular structures and low rejection of those with small molecular structures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The modified membrane may separate the mixed dye solution of congo red (molecular weight 696.66 g/mol) and indigo carmine (molecular weight 407.98 g/mol) and the mixed congo red/NaCl solution precisely. Besides, the modified membrane showed good anti-fouling properties in the long-term stability test. This study may offer research significance for the resource treatment of printing and dyeing wastewater. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"568-576"},"PeriodicalIF":2.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397163","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":"Hydrogenation of biomass-derived succinic acid to form 1,4-butanediol over Co/SiO2 catalyst","authors":"Chenwei Liu,&nbsp;Ran Jing,&nbsp;Yue Li,&nbsp;Daolai Sun,&nbsp;Jianhua Lv","doi":"10.1002/jctb.7793","DOIUrl":"https://doi.org/10.1002/jctb.7793","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Succinic acid is a vital platform chemical derivable from lignocellulosic biomass. Various non-noble metal catalysts were used to hydrogenate succinic acid and produce 1,4-butanediol in this study. Among them, Co-loaded SiO₂ with a moderate mean pore size of 10 nm exhibited a superior catalytic performance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The high catalytic activity of Co-loaded SiO₂, which was prepared by an impregnation method, was demonstrated in the hydrogenolysis of succinic acid to provide 1,4-butanediol. The Co/SiO₂ catalyst reduced at 400 °C and calcined at 300 °C existed in the form of Co²⁺ and Co⁰, exhibiting a high catalytic activity. The production of 1,4-butanediol from succinic acid was significantly enhanced at a temperature of 200 °C and an H₂ pressure exceeding 5 MPa. At 200 °C and 7 MPa H₂ pressure, a 1,4-butanediol selectivity of 67.8% and a full succinic acid conversion were obtained over Co/SiO₂.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The Co-loaded SiO₂ with a moderate mean pore size of 10 nm was conducive to the efficient generation of 1,4-butanediol from succinic acid. The Co/SiO₂ catalyst reduced at 400 °C existed in the form of Co⁰ and Co²⁺. It was suggested that the efficient synthesis of 1,4-butanediol from succinic acid was facilitated by the cooperative action of Co⁰ and Co²⁺. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"545-554"},"PeriodicalIF":2.8,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396853","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":"Comparison of coagulation–Fenton oxidation and coagulation–adsorption processes in textile and chemical industry mixed wastewater","authors":"Aysun Enfiyeci,&nbsp;Deniz İzlen Çifçi","doi":"10.1002/jctb.7789","DOIUrl":"https://doi.org/10.1002/jctb.7789","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In this study, the treatment of mixed wastewater from textile and chemical industries using coagulation followed by Fenton oxidation or adsorption processes was investigated. In the coagulation process, the effects of pH and coagulant dosage were examined using polyaluminium chloride, FeCl₃ and alum. The effects of Fe²⁺ and H₂O₂ concentrations, pH and oxidation time on Fenton oxidation of coagulated mixed industrial wastewater were also investigated. In the adsorption process, the effects of pH, adsorbent dosage and adsorption time were evaluated using coconut-based activated carbon (Coconut-AC) and coal-based activated carbon (Coal-AC).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In coagulation, 68.5% chemical oxygen demand (COD), 63.1% total organic carbon (TOC) and 94.3% color removal were achieved with FeCl₃ at pH 5 and a coagulant dose of 600 mg L⁻¹. Coagulation–Fenton oxidation resulted in 95.7% COD, 84.1% TOC and 99.0% color removal with 1500 mg L⁻¹ Fe²⁺ and 6000 mg L⁻¹ H₂O₂ at pH 3. In the coagulation–adsorption process, 97.5% COD, 95.5% TOC and 99.5% color removal were obtained using Coconut-AC with an adsorbent dosage of 40 g L⁻¹ at pH 3, while 92.3% COD, 82.4% TOC and 99.2% color removal were obtained with Coal-AC at pH 3 and an adsorbent dosage of 30 g L⁻¹.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Effective treatment of mixed industrial wastewater from the textile and chemical industries can be achieved more quickly using Coconut-AC for adsorption following coagulation. Conversely, the same removal efficiencies can be reached over a longer duration with Fenton oxidation after coagulation. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"466-476"},"PeriodicalIF":2.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110331","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":"Looking for improved strains of Azotobacter vineladii and favorable culture conditions yielding high-molecular-weight poly(3-hydoxybutyrate)","authors":"R Quiroz-Cardoso,&nbsp;T Castillo,&nbsp;E Galindo,&nbsp;J Ruíz Escobedo,&nbsp;D Segura,&nbsp;C Peña","doi":"10.1002/jctb.7790","DOIUrl":"https://doi.org/10.1002/jctb.7790","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Poly(3-hydroxybutyrate) (P3HB) is a polymer that presents properties similar to those of conventional plastics. The objective of the present study was to evaluate the influence of oxygen transfer rate (OTR) on the production and molecular weight of P3HB synthesized by the OP-PhbP2⁻ and OP-PhbP3⁺ mutant strains of <i>Azotobacter vinelandii</i>, which have inactivated the gene that expresses the PhbP2 phasin and overexpresses the PhbP3 phasin genes, respectively.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Under high OTR_max (6.0 ± 0.04 mmol O₂ L⁻¹ h⁻¹) mutant OP-PhbP3⁺ exhibited a higher growth rate (0.12 ± 0.01 h⁻¹) and P3HB production (6.77 ± 0.19 g L⁻¹) than that achieved in the cultures using the OP-PhbP2⁻ mutant and OP wild-type strains (5.0 ± 0.1 g L⁻¹ for both strains). Under that condition, the OP-PhbP3⁺ strain also exhibited a lower specific oxygen consumption rate. In contrast, under a low OTR_max (2.8 ± 0.06 mmol O₂ L⁻¹ h⁻¹), the OP-PhbP2⁻ strain had a better performance, reaching 4.5 ± 0.35 g L⁻¹ of P3HB, during the stationary phase (36–72 h). Both mutant strains produced a polymer with a high molecular weight (close to 8000 kDa), regardless of the OTR of the cultures, which remained constant throughout the fermentation. In contrast, the molecular weight produced by the OP strain was in the range 5500 to 6700 kDa under the two conditions evaluated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Overall, our results revealed the biotechnological potential of using modified strains, which overexpress PhbP3 phasin or have inactivated the gene that expresses the PhbP2 phasin, for the production of P3HB, affording a higher molecular weight than that produced by the OP strain. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"477-487"},"PeriodicalIF":2.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110330","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":"Treatability of diclofenac and triclosan solutions by catalytic and photocatalytic oxidation processes","authors":"Eylem Topkaya,&nbsp;Ayla Arslan","doi":"10.1002/jctb.7791","DOIUrl":"https://doi.org/10.1002/jctb.7791","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In recent years, advanced oxidation processes (AOP) have gained importance as highly effective methods in the treatment of organic substances with toxic and permanent properties. Diclofenac (DCF) and Triclosan (TCS) pollutants, which are from the endocrine disrupting chemicals (EDCs) that were encountered in various aquatic environments such as inlet and outlet waters of treatment plants, surface waters, drinking water, groundwater and sediments were reported in the literature. In this study, mineralisation of DCF and TCS pollutants, which were the EDCs, were investigated by AOPs. The applied processes were O₃, O₃/UV, O₃/ZnO, UV/ZnO, and O₃/UV/ZnO. The studies were carried out at two different initial concentrations (5 and 10 mg/L), at 5 ppm ozone dose, 2 × 8 W UVC light, 0.1 g ZnO, in the original pH, and 30 min reaction time.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The highest COD and TOC removal efficiencies were determined in O₃/UV/ZnO process as 82% COD, 71% TOC at 5 mg/L concentration for DCF pollutant and as 72% COD, 75% TOC at 10 mg/L concentration for TCS pollutant. For these process conditions, the ozone consumptions were determined 0.13 mgO₃/mgCOD_removed, 0.31 mgO₃/mgTOC_removed and 0.69 mgO₃/mgCOD_removed, 0.98 mgO₃/mgTOC_removed, respectively. The electrical energy per order values were found in the range of 12.33–20.88 kWh/m³ for O₃/UV/ZnO processes. Treatment costs of these processes were calculated in the range of 0.002 to 44.823 €/m³.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>For the treatability of DCF and TCS pollutants, ozone-based advanced oxidation processes, especially O₃/UV/ZnO photocatalytic ozone oxidation process were determined as a feasible process. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"517-529"},"PeriodicalIF":2.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397166","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":"Impact of intermittent power supply on electrokinetic remediation of chromium-contaminated soil","authors":"Zhaoqin Huang,&nbsp;LinChao Hu,&nbsp;Dongliang Ji,&nbsp;Xiaowei Feng,&nbsp;Liang Ge","doi":"10.1002/jctb.7784","DOIUrl":"https://doi.org/10.1002/jctb.7784","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study investigates the effectiveness of electrokinetic remediation (EKR) with an intermittent power supply on soil contaminated with varying concentrations of chromium (Cr). Two soil types, designated as Soil A and Soil B, were analyzed to assess the impact of different remediation strategies.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Soil A, characterized by lower total Cr levels (1137 mg/kg), exhibited Cr (VI) removal rates exceeding 85%, peaking at 90.79% during the EK1 treatment (20 h on/4 h off). In contrast, Soil B, with significantly higher total Cr concentrations (6639 mg/kg), demonstrated a maximum Cr (VI) removal rate of approximately 80%. The study evaluated the influence of current, soil pH, and the three-dimensional distribution of total Cr, Cr (VI), and Cr (III). Energy consumption increased with longer power-off durations, while Soil B benefited from reduced energy usage and achieved nearly 10% higher Cr (VI) removal efficiency under specific conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The findings demonstrate that EKR with intermittent power supply is an effective and energy-efficient approach for remediating Cr-contaminated soils, particularly when tailored to the specific characteristics of the contaminated soil types. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"416-427"},"PeriodicalIF":2.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117896","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}