Journal of the Taiwan Institute of Chemical Engineers最新文献

{"title":"Dynamic kinetic studies of lysozyme removal as protein waste using weak ion exchange nanofiber membranes in flow systems: Linear and nonlinear model analysis","authors":"Dinh Thi Hong Thanh ,&nbsp;Nguyen The Duc Hanh ,&nbsp;Bing-Lan Liu ,&nbsp;Penjit Srinophakun ,&nbsp;Chen-Yaw Chiu ,&nbsp;Shen-Long Tsai ,&nbsp;Kuei-Hsiang Chen ,&nbsp;Yu-Kaung Chang","doi":"10.1016/j.jtice.2024.105854","DOIUrl":"10.1016/j.jtice.2024.105854","url":null,"abstract":"<div><h3>Background</h3><div>This study explores lysozyme removal using a weak ion exchange nanofiber membrane in a continuous flow system. Understanding removal kinetics is critical for designing, optimizing, and scaling industrial processes. Kinetic models play a crucial role in predicting removal behaviors, including the pseudo-first-order, pseudo-second-order, Elovich, Avrami, and intra-particle diffusion models. Each model provides different insights based on its assumptions, making them suitable for analyzing various removal systems and mechanisms.</div></div><div><h3>Methods</h3><div>The study investigated the effects of four parameters—removal pH, initial lysozyme concentration, loading flow rate, and the number of membranes stacking layers—on dynamic kinetic binding behavior. Both linear and non-linear kinetic models were employed to analyze experimental results, focusing on removal rates and mechanisms.</div></div><div><h3>Significant Findings</h3><div>Analysis revealed key insights into removal kinetics. The change in removal pH significantly affected the binding rate and capacity. Higher initial concentrations increased binding rates, while changes in loading flow rate influenced removal rate and capacity. Increasing the number of membrane stacking layers enhanced the removal capacity and increased the pressure drop. These findings underscore the importance of optimizing parameters for efficient removal in biotechnology and wastewater treatment.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105854"},"PeriodicalIF":5.5,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Liquid-liquid equilibria and intermolecular interactions for extraction of 2-methyl phenol, 3-methyl phenol and phenol from water by a ternary hydrophobic deep eutectic solvent","authors":"Asma Sadrmousavi-Dizaj ,&nbsp;Dongmei Xu ,&nbsp;Lianzheng Zhang ,&nbsp;Jun Gao ,&nbsp;Yixin Ma ,&nbsp;Yinglong Wang","doi":"10.1016/j.jtice.2024.105845","DOIUrl":"10.1016/j.jtice.2024.105845","url":null,"abstract":"<div><h3>Background</h3><div>Hydrophobic deep eutectic solvents (HDESs) are environmentally friendly solvents that can be used to extract water pollutants, including phenolic compounds.</div></div><div><h3>Methods</h3><div>In this research, a ternary HDES (thymol: caprylic acid: capric acid = 1:1:1, molar ratio) has been used for the extraction of 2-methyl phenol, 3-methyl phenol and phenol from water. The effect of the HDES on liquid-liquid phase behavior of the ternary mixtures (2-methyl phenol/ 3-methyl phenol / phenol + HDES + water) at 298.15 K was discussed. The NRTL model has been used to correlate the experimental data. The selectivity and distribution coefficient were calculated as the important indexes for evaluating the extraction potential of the ternary HDES.</div></div><div><h3>Significant Findings</h3><div>The results showed that the ternary HDES can be used as a good extractant for the extraction of 2-methyl phenol, 3-methyl phenol and phenol. Besides, the ternary HDES could extract 2-methyl phenol and 3-methyl phenol better than phenol from their aqueous solutions. Electrostatic potentials, interaction energies and reduced density gradients were used to further investigate the interactions of 2-methyl phenol, 3-methyl phenol and phenol with the ternary HDES.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105845"},"PeriodicalIF":5.5,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Ce/Ca/Mg-compound supports on KF catalyst and reaction kinetics of ethylene carbonate transesterification","authors":"Yueyue He ,&nbsp;Huaigang Cheng ,&nbsp;Zihe Pan ,&nbsp;Xiangping Zhang","doi":"10.1016/j.jtice.2024.105832","DOIUrl":"10.1016/j.jtice.2024.105832","url":null,"abstract":"<div><div>Heterogeneous catalysts can avoid the problem of difficult separation and recovery of homogeneous catalysts in transesterification reactions, but there is a lack of basis for process optimization because the quantitative influence mechanism of supports is not clear. In this work, we firstly attempt to make a comprehensive comparation on the effect of potassium fluoride (KF) catalysts on various supports (carbonates and oxides of cerium, magnesium and calcium) on the transesterification reaction, especially on the kinetics. According to the results, oxide-supported catalysts are significantly more active than carbonate-supported catalysts because they have more active sites. When oxides were used as supports, KF/MgO exhibited good activity because of its stronger basicity and higher number of active sites on the surface. Under the same process conditions, the stability time of KF/CeO₂, KF/CaO and KF/MgO catalysed transesterification reaction was 240 min, 90 min and 30 min, respectively. KF/MgO achieved a conversion of 68.0 %. The activation energies of the KF/CeO₂, KF/CaO and KF/MgO catalysed transesterification reaction were 22.22 kJ/mol, 15.93 kJ/mol and 15.80 kJ/mol, respectively. The surface alkalinity of KF/MgO increased the frequency of molecular collisions of the reactants and exhibited a faster reaction rate.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105832"},"PeriodicalIF":5.5,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significantly enhancing SERS sensitivity to distinguish pesticide concentrations at ppm levels in juices through inherent and added internal standards","authors":"Chih-Yi Liu ,&nbsp;Jhih-Yan Guo ,&nbsp;Jin-Yi Lin ,&nbsp;Sarat Aeimwiratchai ,&nbsp;Kasimayan Uma ,&nbsp;Wen-Yu Li ,&nbsp;Jhe-Ruei Lin ,&nbsp;Shun-Wei Liu","doi":"10.1016/j.jtice.2024.105848","DOIUrl":"10.1016/j.jtice.2024.105848","url":null,"abstract":"<div><h3>Background</h3><div>Surface-enhanced Raman scattering (SERS) aids in pesticide detection, including thiram. The U.S. Environmental Protection Agency has set a 7 ppm residue standard specifically for thiram. Nonetheless, conventional SERS methods often lack sensitivity at ppm levels. We introduce internal standards to overcome this limitation.</div></div><div><h3>Methods</h3><div>Initially, we assessed thiram concentrations in apple and orange juices using the SERS peak at 1383 cm^-1, denoted by its intensity as S₁₃₈₃. However, S₁₃₈₃ alone lacked sensitivity to ppm level variation. Apple juice exhibited a SERS peak at 732 cm^-1 (intensity denoted as S₇₃₂), serving as an inherent internal standard. The ratio of S₁₃₈₃ to S₇₃₂ could differentiate thiram concentrations by ∼1 ppm within the range of 1 × 10^-5 to 3 × 10^-5 M. Pure orange juice lacked a discernible SERS peak, necessitating an added internal standard. Adenine, with SERS intensity at 731 cm^-1 (S₇₃₁) and 1322 cm^-1 (S₁₃₂₂), was employed for this purpose. The combined use of S₁₃₈₃ and the ratios of S₁₃₈₃ to S₇₃₁ and S₁₃₈₃ to S₁₃₂₂ could distinguish thiram concentration differences by ∼1 ppm within the range of 1 × 10^-5 to 5 × 10^-5 M.</div></div><div><h3>Significant findings</h3><div>Our approach facilitates exceptional differentiation at the ppm level, enhancing pesticide detection for improved food safety and environmental health.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105848"},"PeriodicalIF":5.5,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soret and Dufour effects in two-phase boundary layer flow of non-Newtonian and Newtonian fluids with uniform shear strength ratio","authors":"S. Goher,&nbsp;Z. Abbas,&nbsp;M.Y. Rafiq","doi":"10.1016/j.jtice.2024.105836","DOIUrl":"10.1016/j.jtice.2024.105836","url":null,"abstract":"<div><h3>Background</h3><div>This study numerically investigates heat and mass transfer in two-phase boundary layer shear flows, focusing on a non-Newtonian Casson fluid interacting with an adjacent Newtonian fluid under the influence of thermal radiation. By incorporating both Soret and Dufour effects, we examine how temperature gradients influence mass flux and how concentration differences affect energy flux. These coupled effects are essential for applications involving simultaneous heat and mass transport, such as chemical reactors, separation processes, and thermal management systems.</div></div><div><h3>Methods</h3><div>The analysis explores boundary layer convergence with varying shear intensities, utilizing the MATLAB solver “bvp4c” with appropriate similarity transformations for computational accuracy. The resulting numerical data are presented in graphical form to illustrate the impact of key parameters on flow characteristics. Additionally, variations in the Sherwood number, Nusselt number, and interfacial shear stress are depicted for each fluid across different parameter values. To evaluate the accuracy of our numerical method, we conducted a comparative analysis with the results reported by Weidman and Wang [4] and Wang [2]. This comparison demonstrated an excellent match, confirming the reliability of our approach, as shown in Table 1 and Fig. 2.</div></div><div><h3>Significant findings</h3><div>The results demonstrate that the fluid temperature increases with the Dufour number, while the concentration rises with the Soret number. Higher Casson parameter values lead to a reduction in interfacial shear stress in both fluids. Furthermore, the Nusselt and Sherwood numbers increase with an enhanced radiation parameter, highlighting the influence of thermal radiation on heat and mass transfer. These insights offer a valuable understanding of flow behavior in systems with coupled thermal and concentration gradients.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105836"},"PeriodicalIF":5.5,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biofabrication of polyhydroxybutyrate (PHB) in engineered Cupriavidus necator H16 from waste molasses","authors":"Yu-Chieh Lin,&nbsp;I-Son Ng","doi":"10.1016/j.jtice.2024.105843","DOIUrl":"10.1016/j.jtice.2024.105843","url":null,"abstract":"<div><h3>Background</h3><div><em>Cupriavidus necator</em> H16, a native polyhydroxybutyrate (PHB) producer, has emerged as a promising candidate for sustainable bioproduction to replace conventional plastics. However, most fermentation processes still rely on expensive substrates. Therefore, developing an eco-friendly bioprocess for PHB using waste materials is urgent and essential.</div></div><div><h3>Method</h3><div>An engineered strain Lgg-H16, incorporating galactose permease (<em>galP</em>) and glucokinase (<em>glk</em>), was employed to boost glucose uptake and phosphorylation. Then, biomass and PHB production were improved by fine-tuning the carbon, nitrogen, and phosphorus ratios. Yeast extract was supplemented as an additional nutrient, and a tailored feeding strategy was applied to maximize PHB output. To lower the manufacturing costs, waste molasses from the sugar industry, was utilized for fed-batch fermentation. The physical properties of the PHB, such as molecular weight and crystallinity, were analyzed using differential scanning calorimeter (DSC) and gel permeation chromatography (GPC), respectively.</div></div><div><h3>Significant results</h3><div>Engineered Lgg-H16 strain exhibited a 2.15-fold increase in specific growth rate compared to the wild type with a C:N:P ratio of 20:1:18, as well as supplemented 2 g/L yeast extract in the medium. PHB yield reached 17.4 g/L with 70 % content from waste molasses in fed-batch fermentation with an atomizer to increase gas dispersion, costing only 1 % of pharmaceutical-grade glucose. All physical properties of the PHB produced by Lgg-H16 were comparable to commercial product, supporting this promising bioprocess by using the low-cost feedstocks for high-value bioplastic PHB.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105843"},"PeriodicalIF":5.5,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From urea to high-efficiency photocatalyst: The impact of confined-degree and silica support on structure engineering of carbon nitride","authors":"Zhaoli Yan ,&nbsp;Tiantian Li ,&nbsp;Li Wang ,&nbsp;Yongsheng Yu ,&nbsp;Xi He ,&nbsp;Peng Liu ,&nbsp;Qiangshan Jing","doi":"10.1016/j.jtice.2024.105849","DOIUrl":"10.1016/j.jtice.2024.105849","url":null,"abstract":"<div><h3>Background</h3><div>The synthesis of g-C₃N₄ (CN) through confined pyrolysis of urea is a widely employed method. However, the impact of confined-degree on the nano- and molecular-structure of CN has been scarcely addressed.</div></div><div><h3>Methods</h3><div>We investigated this influence by varying the confined-degree of the covered crucibles used for urea pyrolysis. Additionally, a silica nanosheet (SiNS) support was incorporated to achieve high dispersion and easy use.</div></div><div><h3>Significant findings</h3><div>With increasing confined-degree, the crystallinity and porosity of the synthesized CN nanosheets initially decreased and then increased, whereas the size and dispersion exhibited an opposite tendency. The introduction of SiNS primarily enhanced the yield (excepting CN/SiNS-1), reduced the size (excepting CN/SiNS-4), and improved the dispersion of the supported CN nanosheets. Furthermore, larger CN nanosheets with greater dispersion enhanced the separation efficiency of photoinduced carriers, whereas smaller nanosheets with higher crystallinity displayed a more negative conduction band minimum potential (<em>E</em>_CBM), offering more reactive oxygen species. Therefore, the optimal CN/SiNS-4 composite exhibited significant photocatalytic activity for degrading Rhodamine B in 25 min, with an apparent rate constant of 0.189 min⁻¹, owing to the nanostructure dependent photoreactivity of the well-dispersed and small-sized CN nanosheets, and the strong adsorption capacity of SiNS and urea-derived CN.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105849"},"PeriodicalIF":5.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced removal of ciprofloxacin antibiotic using agricultural byproduct-derived biochars: From studies on adsorption kinetic, isotherm and thermodynamic to explore mechanistic insights into the removal pathway","authors":"Tan Nghia Bui ,&nbsp;Minh-Thanh Le ,&nbsp;Minh-Duc Le ,&nbsp;Van-Phuoc Kha ,&nbsp;Thanh-Sang Le ,&nbsp;Huu Tap Van ,&nbsp;Van-Huy Nguyen ,&nbsp;Lan Huong Nguyen","doi":"10.1016/j.jtice.2024.105846","DOIUrl":"10.1016/j.jtice.2024.105846","url":null,"abstract":"<div><h3>Background</h3><div>Ciprofloxacin (CIP) antibiotic, classified as an emerging organic contaminant, has caused an adverse impact on the ecological environment due to its persistence.</div></div><div><h3>Methods</h3><div>In this study, CIP was adsorbed on a novel nanocomposite using lanthanum ferrite spinel nanoparticles (LaFe₂O₄ NPs) dispersed on litchi shell-derived biochar supporter (BLF) with various loading ratios. The adsorption tests were conducted in batch mode to thoroughly investigate operational parameter effects. In addition, the adsorption kinetics, isotherms, and thermodynamics of CIP onto BLF at various temperatures were systematically studied. The as-synthesized adsorbent was thoroughly characterisized. Finally, CIP adsorption mechanisms onto BLF were revealed.</div></div><div><h3>Significant findings</h3><div>Our findings showed that the pristine biochar (PBC) was loaded by LaFe₂O₄, which resulted in more thorough carbonization, enhanced aromaticity, hydrophobicity, porosity, and enriched surface functional groups. The CIP adsorption onto BLF was the highest under optimal operational conditions of solution pH of 5.0, 3.0 g/L biochar dosage, and 50 mg/L initial CIP concentration. The pseudo-second order model best matched the CIP adsorption kinetics with high correlation coefficients of 0.9653–0.9939. The Langmuir model better described the adsorption behaviors of CIP on BLF, with a maximum adsorption capacity of 36.5 mg/g, which was greater than that on PBC by about 1.5 times. CIP adsorption on the BLF exhibited a spontaneous and endothermic nature. The primary mechanisms of CIP adsorption on the BLF were H-bonding and π-π interaction. In particular, La and Fe constituents in BLF functionally enhanced the CIP adsorption via the surface complexation mechanism. These findings illustrated that the BLF was a novel, feasible, and promising adsorbent for the effective removal of CIP antibiotics from water.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105846"},"PeriodicalIF":5.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electronic structure modulation from configuring anatase TiO2 into a bicontinuous mesostructure","authors":"Ying-Hao Lu,&nbsp;Bor Kae Chang,&nbsp;Yi-Fan Chen","doi":"10.1016/j.jtice.2024.105829","DOIUrl":"10.1016/j.jtice.2024.105829","url":null,"abstract":"<div><h3>Background</h3><div>Configuring TiO₂ into bicontinuous mesostructures greatly enhances its photocatalytic efficiency. While this enhancement is commonly attributed to the expanded surface area, it has become apparent that the surface-area expansion alone cannot fully explain the efficiency enhancement.</div></div><div><h3>Methods</h3><div>Investigating additional factors becomes imperative and will be conducive to realizing further efficacy enhancement for photocatalysts. This paper presents spectroscopic and density functional theory approaches in finding additional reasons for the increased photocatalytic activity.</div></div><div><h3>Significant Findings</h3><div>Results show that the enhanced efficacy resulting from mesostructuring is not solely due to an expansion in surface area but also stems from modulations in the TiO₂ electronic structure. The finding not only advances current understanding of mesostructuring-induced effects on metal-oxide semiconductors but also introduces an alternative avenue for fine-tuning a material electronic structure.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetron sputtering of niobium thin films onto wood biochar to increase the selectivity for electrostatic attraction of anionic brilliant blue dye","authors":"Adelício Lucas Alberto ,&nbsp;Bárbara Luiza Brandenburg dos Santos ,&nbsp;Marcelo Godinho ,&nbsp;Cesar Aguzzoli ,&nbsp;Yasmin Vieira ,&nbsp;Luis Felipe Oliveira Silva ,&nbsp;Bashir Adelodun ,&nbsp;Sonaimuthu Mohandoss ,&nbsp;Naushad Ahmad ,&nbsp;Guilherme Luiz Dotto","doi":"10.1016/j.jtice.2024.105828","DOIUrl":"10.1016/j.jtice.2024.105828","url":null,"abstract":"<div><h3>Background</h3><div>Magnetron sputtering was employed to deposit thin niobium films onto biochar surfaces to increase selectivity for electrostatic interactions.</div></div><div><h3>Methods</h3><div>Biochar samples were coated with niobium under various power levels and deposition times by magnetron sputtering. Each material was then characterized and tested for adsorption performance with an anionic model molecule.</div></div><div><h3>Significant findings</h3><div>Niobium impregnation raised the point of zero charge of the biochar by 0.33 to 0.94 pH units, expanding the pH range in which the niobium-coated adsorbents maintain a positively charged surface. Optimal adsorption was observed at 298 K with an adsorbent dose of 1 g L⁻¹ and pH 2.4. The highest adsorption capacity of 43.64 mg g⁻¹ was achieved with the sample produced at 150 W for 30 min. This study highlights that the efficacy of niobium-coated adsorbents depends on the balance between metal loading and accessible surface area, emphasizing that increased metal deposition can shift the dominant adsorption mechanism by modifying surface characteristics.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"167 ","pages":"Article 105828"},"PeriodicalIF":5.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}