Journal of Industrial and Engineering Chemistry最新文献

{"title":"A hybrid mesoporous sheet-like NiCo2O4@P,S,N-doped carbon nano-photocatalyst for efficient synergistic degradation of Congo red: Statistical, DFT and mechanism studies","authors":"Hassanien Gomaa ,&nbsp;Cuihua An ,&nbsp;Qibo Deng ,&nbsp;Hamud A. Altaleb ,&nbsp;Sobhi M. Gomha ,&nbsp;Tariq Z. Abolibda ,&nbsp;Mohamed A. Shenashen ,&nbsp;Ning Hu","doi":"10.1016/j.jiec.2024.06.023","DOIUrl":"10.1016/j.jiec.2024.06.023","url":null,"abstract":"<div><div><span>Here, a hybrid mesoporous<span> sheets-like nano-catalyst was used to investigate the degradation of Congo Red (CR) dye. The photocatalytic<span> efficiency of CR dye degradation<span> was evaluated using a variety of mesoporous hybrid materials containing P,S,N-doped carbon (PC1), Co</span></span></span></span>₃O₄@P,S,N-doped carbon (PC2), NiO@P,S,N-doped carbon (PC3), and NiCo₂O₄<span>@P,S,N-doped carbon (PC4) sheet-like. The results indicated that the PC4 nano-catalyst exhibited exceptional efficacy in the photocatalytic degradation<span> of CR dye, achieving a degradation efficiency exceeding 99 %. The results also showed that PC4 possessed a band gap of 1.7 eV. To formulate an effective photodegradation<span><span><span> system, Analysis of Variance (ANOVA), a valuable statistical method, was employed to examine how varying pH, </span>PC<span> dose, and irradiation time can improve the photodegradation performance. Influential key parameters, including pH, PC dose, irradiation time, and CR concentration, were optimized through </span></span>response surface methodology<span><span> applying a four-factor, three-level Box-Behnken design (BBD). To achieve a 99 % decolorization of CR, the optimum conditions were determined to be pH 3.8, PC dose at 14 mg, irradiation time of 10.2 min, and CR concentration of 14.3 ppm. </span>Kinetic models<span> demonstrated that CR degradation followed pseudo-first-order kinetics. Moreover, band gap comparisons, scavenger analysis, and density functional theory (DFT) were used to discuss the CR degradation mechanism.</span></span></span></span></span></div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 130-144"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518080","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":"Antibacterial properties of reduced graphene oxide fibers fabricated by hydrothermal method","authors":"Lili Wang ,&nbsp;Wei Mu ,&nbsp;Yufeng Liu ,&nbsp;Xin Wang ,&nbsp;Xianliang Zheng","doi":"10.1016/j.jiec.2024.06.038","DOIUrl":"10.1016/j.jiec.2024.06.038","url":null,"abstract":"<div><div><span>The antibacterial activity<span> of reduced graphene oxide fibers (rGOFs) fabricated by a one-step dimensionally confined hydrothermal technique was investigated on both Gram-positive and Gram-negative models of bacteria in this study. The surface morphology, microstructure, and chemical composition of the as-prepared rGOFs were determined using scanning electron microscopy (SEM), X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. SEM images showed the fiber to have an average diameter of 46.6 ± 0.53 μm, composed of rGO nanosheets with numerous sharp edges. XPS and Raman spectroscopy confirmed the presence of </span></span><em>sp</em>³-bonded carbon and structural defects in the samples. Antibacterial properties of rGOFs were tested and analyzed using agar well diffusion, colony counting method, SEM observation, and reactive oxygen species generation. The excellent broad-spectrum antibacterial ability of rGOFs is attributed to the physicochemical properties and unique surface morphological features of the samples, which could facilitate the development of rGOFs-based biomaterial for various biomedical and nano-technological applications such as a promising antibacterial agent or an implant/scaffold for nerve tissue engineering and regeneration.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 297-304"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569154","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":"Initial exploration of solution-processed ultrapure blue organic light emitting diodes utilizing phosphorescent Pt complex and MR-TADF emitters","authors":"Hee Won Son ,&nbsp;Da In Kim ,&nbsp;Ji Hun Kim ,&nbsp;Thi Na Le ,&nbsp;Yun-Hi Kim ,&nbsp;Min Chul Suh","doi":"10.1016/j.jiec.2024.07.012","DOIUrl":"10.1016/j.jiec.2024.07.012","url":null,"abstract":"<div><div><span>To achieve very high efficiency in solution-processed organic light emitting diodes<span> (OLEDs), one promising and trailblazing approach is the utilization of the phosphor sensitized fluorescence (PSF) mechanism. In our study, we successfully apply this mechanism to fabricate highly efficient blue solution-processed device by introducing novel structured platinum (Pt) complex as a phosphorescent sensitizer. The significant spectral overlap between the sensitizer and final dopant (J</span></span>_F), with a J_F value of 14.83 × 10¹⁴ nm⁴ M⁻¹ cm⁻¹<span><span>, enables high rates of energy transfer and results in a moderately high external quantum efficiency, with the device displaying (0.12, 0.12) color coordinates while achieving a notable 9.68 % external quantum efficiency. The system is particularly promising for designing OLEDs with sub-microsecond radiation decay times. Additionally, the PSF emitter exhibits ultrapure blue emission, with a narrow full-width half maximum of 16 nm from photoluminescence and 18 nm from </span>electroluminescence. Moreover, the radial distributions of EML molecules at different annealing temperatures were investigated, showing the absence of molecular aggregation, ensuring a smooth surface for the solution device. These findings highlight the promising potential of employing the PSF mechanism along with a stable interfacial layer to achieve remarkable performance in solution-processed OLED devices.</span></div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 512-520"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141695189","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":"Highly stable mesoporous Ni-phyllosilicate particle under high temperature hydrothermal and base conditions towards industrial catalytic applications","authors":"Yongsu Park ,&nbsp;Debabrata Chakraborty ,&nbsp;Eun-Bum Cho","doi":"10.1016/j.jiec.2024.07.013","DOIUrl":"10.1016/j.jiec.2024.07.013","url":null,"abstract":"<div><div>Two mesoporous nickel phyllosilicate<span> (Ni-PS) samples with Ni/Si ratios of 0.3 and 1 were used to compare high-temperature hydrothermal stability. The Ni-PS structures have well-developed porosity and pore size distributions mainly ranging from 2 to 20 nm. To assess their hydrothermal resistance as a reusable heterogeneous catalyst in high-temperature reactions, the samples were exposed to 800 °C for 7 days using steam-supplied muffle furnaces. Three types of mesoporous silica samples (i.e. MCM-41, SBA-15, and mesoporous benzene-silica) and two zeolites (i.e. ZSM-5 and zeolite-Y) were compared under the same conditions. The hydrothermal resistance was primarily confirmed based on changes in pore size distribution and surface area through nitrogen-sorption isotherm analysis. The crystal structure and the binding energy of each sample were investigated by X-ray diffraction and X-ray photoelectron spectroscopy measurements. The Ni-PS structures displayed excellent stability (i.e. BET surface area retained over 77 % and 65 % after 1-d and 7-d treatment, respectively.) compared with other mesoporous samples, and even higher stability than zeolite Y. In addition, structural stability at pH = 10 is much higher than that of ZSM-5. This suggests that it could be used for various catalytic chemical reactions including hydrogenation and cracking processes because NiO and Ni nanoparticles are uniformly distributed on the surface, maintaining their particle shape even after a reduction process.</span></div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 521-539"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141699627","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":"A hybrid framework of first-principles model and machine learning for optimizing control parameters in chemical processes","authors":"Wonjun Noh ,&nbsp;Sihwan Park ,&nbsp;Sojung Kim ,&nbsp;Inkyu Lee","doi":"10.1016/j.jiec.2024.07.018","DOIUrl":"10.1016/j.jiec.2024.07.018","url":null,"abstract":"<div><div>Artificial intelligence (AI) has recently gained prominence for addressing complex problems in chemical plants. Despite its enthusiastic attention, the industrial application of AI is limited due to a lack of both reliability and diversity in its operation data at the plant scale. To address this issue, a framework that integrates the machine learning (ML) model and first-principles approach is proposed herein. The performance of the proposed framework is demonstrated by its application to the control system of the liquefied natural gas fuel gas supply system. In this framework, commercial simulation software was used to implement a high-accuracy first-principles model using operation data. Thereafter, a wide range of data was generated that cannot be obtained in an industrial plant. The generated data was fed to the ML model that predicted the control performance with variations of the control parameters. The ML model, built with high-quality data, can predict the control performance with high accuracy. The optimal control parameters were quickly found using the ML model, thereby improving the control performance. This study presents a solution that can overcome the limitations of using an ML model alone by exploiting the advantages of both the first-principles and data-driven approaches at the plant scale.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 582-596"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141704934","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":"Ultrasound-induced PMS activation for ofloxacin degradation from pharmaceuticals wastewater: DFT calculation, mechanisms and toxicity evolution","authors":"Arvind Kumar ,&nbsp;Radha Devi Pyarasani ,&nbsp;Abdul Gaffar Sheik ,&nbsp;Basheswer Prasad ,&nbsp;Sheena Kumari ,&nbsp;Faizal Bux","doi":"10.1016/j.jiec.2024.06.046","DOIUrl":"10.1016/j.jiec.2024.06.046","url":null,"abstract":"<div><div>The degradation of persistent and refractory pollutants particularly antibiotics from drugs and pharmaceuticals wastewater remains challenging due to their high toxicity. Herein, a hybrid system Cu_xFe_1-xZnO − layer double oxide (LDO)/PMS/US designed for the degradation of ofloxacin (OFC) and total organic carbon (TOC) from drugs and pharmaceuticals wastewater. Catalyst 0.4CFZ-LDO exhibited a remarkable catalytic activity for OFC (98.76 %, 0.0703 min⁻¹) and TOC (76.97 %, 0.0259 min⁻¹) removal, with synergistic index value (OFC, 3.45) and (TOC, 1.69) under the optimum conditions. The quenching experimental study reveals that sulfate radical (SO₄^•−) was dominant reactive oxygen species (ROS) for OFC and TOC removal. Density functional theory (DFT) demonstrates that strong attacking sites on the OFC structure were C14, C15 and C23 due to high concentration of Fukui index. Based on the as quantitative structure–activity relationship (QSAR) prediction model system 0.4CFZ-LDO/PMS/US potentially reduced the bio-toxicity (acute toxicity, mutagenicity, bioaccumulation factor) after treatment. Furthermore, catalyst 0.4CFZ-LDO demonstrated remarkable stability with minor leaching of metal ions. Critical contribution of Fe³⁺/Fe²⁺ and Cu²⁺/Cu⁺ surface catalyzed-redox cycle was evaluated with the help of X-ray photoelectron spectroscopy (XPS) analysis. Furthermore, six potential routes of OFC degradation were proposed based on the DFT study, and intermediates were identified by GC–MS analysis. Based on the electrical energy per order (EEO) analysis, economic cost of pharmaceutical wastewater was estimated to be $0.059/L.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 366-379"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of dopamine/TiO2 nanocomposite hydrogel using fenugreek gum for efficient photocatalytic degradation of organic pollutants under visible light irradiation","authors":"Kasula Nagaraja,&nbsp;Muthuraj Arunpandian,&nbsp;Tae Hwan Oh","doi":"10.1016/j.jiec.2024.07.019","DOIUrl":"10.1016/j.jiec.2024.07.019","url":null,"abstract":"<div><div>The efficient removal of organic pollutants from wastewater is a global challenge and poses a significant threat to public health and ecosystems. In this study, we synthesized a novel fenugreek gum-based polymer functionalized with dopamine (DA) and monomers dimethylamino ethyl methacrylate (DMA), acrylamide, and N, N, methylene bis acrylamide (MBA) as a crosslinker and TiO₂ nanocomposite hydrogel photocatalytic degradation for environmental remediation. The nanocomposite hydrogel was determined using various analytical techniques such as FT-IR, XRD, FESEM, EDX, DRS-UV, TEM, LC-MS, and XPS. The optical band gap was at 2.81 eV, calculated from UV–visible DRS spectra. The XRD confirmed the crystalline and anatase phases. TEM, EDX, and XPS analyses defined the size, shape, chemical composition, and purity of synthesized FNG/DDM/TiO₂ nanocomposite hydrogel. The resulting nanocomposite hydrogel photocatalyst effectively degraded hazardous pollutants such as methylene blue (MB) and Congo red (CR) organic dyes under visible light irradiation. The decomposition efficiency of Congo red is 95.27 % within 75 min and methylene blue is 73.26 % within 150 min. Moreover, the results of the trapping experiment revealed that the active species in the photocatalytic degradation process are holes (h⁺) and super oxide radicals (^.O₂^-), more reactive species. The probable degradation intermediates and the degradation pathway were analyzed by LCMS analysis, and the degradation fragments formed during Congo red (CR) dye degradation were identified. The recyclability and stability were studied in the presence of a photocatalyst, achieving 90.5 % degradation after four cycles. The FNG/DDM/TiO₂ hydrogel also effectively removed dyes from wastewater containing organic pollutants. The novel FNG/DDM/TiO₂ nanocomposite hydrogel, synthesized through an environmentally friendly polymer, demonstrated high efficiency in degrading organic dyes, excellent recyclability with robust structural stability, and significant potential for photocatalytic degradation of wastewater across various industries.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 597-609"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846325","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":"A review of binder-free electrodes for advanced supercapacitors","authors":"Ningshuang Zhang ,&nbsp;Mengya Wang ,&nbsp;Yin Quan ,&nbsp;Xiaohua Li ,&nbsp;Xinyi Hu ,&nbsp;JingXuan Yan ,&nbsp;Yinong Wang ,&nbsp;Mengzhen Sun ,&nbsp;Shiyou Li","doi":"10.1016/j.jiec.2024.06.025","DOIUrl":"10.1016/j.jiec.2024.06.025","url":null,"abstract":"<div><div><span>Supercapacitors are high-performance electrochemical energy storage devices with high power density, long cycle life, and rapid charge and discharge capabilities. However, in the conventional electrode fabrication process, the addition of binders without conductivity and electrochemical activity reduces the mass of active materials and increases resistance in the electrode, which compromises its electrochemical performance. Therefore, the binder-free electrode is an effective method to enhance the electrochemical performance and </span>energy density of electrodes. The different fabrication technologies for binder-free electrodes have been explored in detail, especially focusing on surface growth on current collectors, self-assembly techniques, and the new technological methods. The design of electrochemically active materials, including carbon, metal compounds, and conductive polymers have been emphasized, along with the optimization of processes and the enhancement of performance, interface engineering and improvements in electrode functionality, the utilization of multifunctional performance materials, and the design and optimization strategies grounded in theoretical simulations. Depending on the actual situation, binder-free electrodes can increase energy density and specific capacitance 10% to 30% approximately. Finally, the advantages of binder-free electrode technology in supercapacitors and other energy storage fields are introduced, further exploring future research directions and the potential breakthroughs and challenges that binder-free electrode technology may bring.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 1-31"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518135","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":"Impact of solvent temperature on graphite shear exfoliation efficiency","authors":"Jae Gu Jung,&nbsp;Jin Hee Kim,&nbsp;Juhyung Moon,&nbsp;Yu Jin Kim,&nbsp;Junhyeong Lee,&nbsp;Tae Hoon Lee,&nbsp;Ho Bum Park","doi":"10.1016/j.jiec.2024.06.028","DOIUrl":"10.1016/j.jiec.2024.06.028","url":null,"abstract":"<div><div>Liquid phase exfoliation (LPE) of graphite is a promising pathway for graphene flakes (GF) due to its scalability and cost-effectiveness. However, the method has significant limits at the industrial scale, such as low yield of GF and long processing times. In this study, we investigate the effect of organic solvents such as N-methyl-2-pyrrolidone (NMP) and methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (PolarClean) temperature on shear-induced exfoliation. The GF concentration was successfully obtained 0.62 mg/ml in NMP and 0.68 mg/ml in PolarClean within just 2 h at 263 K, without surfactants or any additional additives. These results revealed the improved exfoliation efficiency due to changes in solvent polarity, surface tension, and dispersion stability with increased viscosity. In addition, we investigate the optimization conditions required for liter-scale shear-induced exfoliation of graphite in PolarClean. As-prepared GF has significant potential as an effective nanofiller for enhancing the mechanical strength of commercial polymers. This study not only advances the understanding of the LPE mechanisms but also paves the way for the industrial application of this method in the green synthesis of graphene-based nanocomposites.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 185-192"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504924","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":"Adsorption and separation of lead ions in phosphoric acid by co-doped carbon nanotubes with sulfur, oxygen, and manganese","authors":"Gang Cheng ,&nbsp;Xin Zhou ,&nbsp;Chongyu Du ,&nbsp;Guotao Hu ,&nbsp;Qian Lin ,&nbsp;Hongyan Pan","doi":"10.1016/j.jiec.2024.06.029","DOIUrl":"10.1016/j.jiec.2024.06.029","url":null,"abstract":"<div><div>The purpose of this study was to prepare a novel and efficient adsorbent for the removal of trace Pb(II) from phosphoric acid. Manganese oxide/sulfur-oxygen doped carbon nanotube composites (CNTs-S-O-Mn) were prepared from multi-walled carbon nanotubes modified with nitric acid, mercaptoacetic acid, acetic anhydride, concentrated sulfuric acid and potassium permanganate. Characterisation revealed that CNTs-S-O-Mn contained hydroxyl, sulphonate groups, MnO and Mn₃O₄. At 298 K, 15.362 mg·L^-1 initial concentration of lead ions, and 18.4 % phosphoric acid concentration, the adsorption capacity of the composites for lead ions was 38.65 mg·g⁻¹<span>, which was higher than that of the unmodified CNTs, 8.04 mg·g</span>⁻¹. The adsorption kinetic data at 298 K conformed to the quasi-second-order kinetic equation, R² = 0.997; 298, adsorption isotherms at 308 and 318 K conformed to the Langmuir equation, R² = 0.990–––0.991. The adsorption capacity increased with decreasing phosphoric acid concentration. In this system, the adsorption is affected by a certain concentration of lead ions. Adsorption occurs via chemisorption and is exothermic. Sulfonic acid groups and hydroxyl groups on manganese oxides play an important role in the adsorption of Pb (II) through surface complexation with Pb (II). These results indicate that the removal of trace Pb (II) from phosphoric acid by modified carbon nanotubes is feasible, revealing a new use of carbon nanotubes for phosphoric acid purification.</div></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"141 ","pages":"Pages 193-202"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569156","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}