{"title":"Numerical simulation on the effect of contact angle on the permeation of emulsions through a membrane in premix membrane emulsification","authors":"Jophous Mugabi , Jae-Ho Jeong","doi":"10.1016/j.molliq.2024.126624","DOIUrl":"10.1016/j.molliq.2024.126624","url":null,"abstract":"<div><div>The effect of membrane wettability on emulsion permeation behavior in premix membrane emulsification was investigated. The Volume of Fluid (VOF) method was employed to simulate the permeation of a single droplet through pore channel constrictions of a microporous membrane. The wettability was adjusted by varying the wall contact angle between 0 and 180 degrees.</div><div>For contact angles less than 90 degrees, lower angles resulted in complete wetting of the membrane, leading to lower capillary pressures but higher critical pressures for the dispersed phase to permeate through the membrane. Conversely, as the contact angles increase, the capillary pressures increase while the critical pressure required for permeation reduces due to decreased wettability of the channel walls. For contact angles greater than 90 degrees, the deformed droplets did not wet the channel walls and reformed into spherical droplets upon exiting the channel. In this regime, the critical pressure for droplet permeation showed an inverse relationship with the contact angle. The capillary pressure was associated with the continuous water phase that wetted the channel walls, rather than with the droplet itself. As the contact angle increased, the degree of wetting by the continuous phase also increased, resulting in the lowest critical pressure observed at a contact angle of 180 degrees. Optimizing the contact angle can minimize process energy requirements while ensuring efficient droplet passage through the pore constriction. This contributes to more sustainable and cost-effective processes in various industries such as emulsification, oil separation, and microfiltration.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126624"},"PeriodicalIF":5.3,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Suhong Zhang , Yue Ma , Kai Wang , Xiufeng Shao , Jianfei Ding
{"title":"Cooperative effects of quaternary ammonium salt collectors and cationic polyacrylamide on flotation separation of diaspore and kaolinite: Experimental study and simulation","authors":"Suhong Zhang , Yue Ma , Kai Wang , Xiufeng Shao , Jianfei Ding","doi":"10.1016/j.molliq.2024.126605","DOIUrl":"10.1016/j.molliq.2024.126605","url":null,"abstract":"<div><div>In the presence of depressant cationic polyacrylamide (CPAM), three quaternary ammonium salt as collectors were used in the flotation separation of diaspore and kaolinite, respectively. The flotation results of single minerals showed that the high recovery of the kaolinite and the low recovery of diaspore were gained, which indicated that the floatability of kaolinite was hardly affected while the floatability of diaspore was obviously weakened by using Gemini collector and CPAM under the conditions of pulp pH value of 6. The mass ratio of Al<sub>2</sub>O<sub>3</sub> to SiO<sub>2</sub> (A/S) was also increased from 4.86 to 8.90. FTIR spectra, adsorption capacity of collectors and zeta potential analysis illustrated that the maximum difference value in adsorption capacity of Gemini collector on the surface of kaolinite and diaspore was obtained because of the differences of the collectors in the presence of CPAM. This phenomenon was further supported by molecular dynamics simulation analysis and XPS analysis. The opinion can be provided that the difference between kaolinite and diaspore was enlarged by regulating the cooperation of the collector and the depressant for increasing the flotation separation of minerals.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126605"},"PeriodicalIF":5.3,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Zwitterionic polymer grafted nano-SiO2 as fluid loss agent for high temperature water-based drilling fluids","authors":"Shaocong Pang , Yang Xuan , Lina Zhu , Yuxiu An","doi":"10.1016/j.molliq.2024.126542","DOIUrl":"10.1016/j.molliq.2024.126542","url":null,"abstract":"<div><div>With the advancement of ultra-deep well technology, there has been an increased demand for enhanced high-temperature stability in water-based drilling fluids. To address this challenge, this study has developed a novel polymer nanocomposite (AAND-S) to augment the thermal stability of polymeric fluid loss additives in WBDF. AAND-S was synthesized through aqueous radical polymerization, consisting of zwitterionic polymers with rigid anionic groups and strong cationic adsorption groups, grafted with modified silica nanoparticles. The structure of AAND-S was characterized by infrared and thermogravimetric analyses. The performance of drilling fluids containing AAND-S was evaluated under high-temperature aging conditions at 220 ℃. Notably, the Herschel-Bulkley model provided a more accurate description of the behavior of this non-Newtonian fluid. Specifically, after aging at 220 ℃, the fluid loss of the base mud with AAND-S was reduced to 12.25 mL. Additionally, AAND-S exhibited good salt tolerance up to 25 % NaCl solution. The compatibility of AAND-S was also excellent, enabling it to synergistically interact with other drilling fluid additives to form an efficient drilling fluid system that effectively minimized fluid loss. The mechanism of action of AAND-S was investigated through total organic carbon analysis, zeta potential measurements, and particle size analysis. It was found that AAND-S enhanced the adsorption capacity of bentonite, improving the stability of the colloidal solution and leading to a more uniform particle size distribution. Further SEM microstructural analysis confirmed that the incorporation of AAND-S facilitated the formation of high-quality filter cakes with a dense surface and minimal permeability at elevated temperatures. In conclusion, AAND-S, as a high-performance fluid loss additive, is anticipated to play a significant role in drilling operations in ultra-high temperature formations.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126542"},"PeriodicalIF":5.3,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alena Randová , Lidmila Bartovská , Štěpán Hovorka , Karel Friess , Pavel Izák
{"title":"Unveiling the apparent density of swollen PDMS in hydrocarbons – A distinction between dimensional-based and volume-additivity methods","authors":"Alena Randová , Lidmila Bartovská , Štěpán Hovorka , Karel Friess , Pavel Izák","doi":"10.1016/j.molliq.2024.126598","DOIUrl":"10.1016/j.molliq.2024.126598","url":null,"abstract":"<div><div>This article reports the swelling-induced effect on the density, mass, area, and thickness of the polydimethylsiloxane (PDMS) membrane in C<sub>6</sub>–C<sub>12</sub> linear alkanes. Their time dependence (up to 500 min) was determined at 20 °C and atmospheric pressure. From the combination of areal and thickness data, the experimental PDMS volumes of the swollen polymer were calculated, and the time dependence of the apparent density of the swollen membrane (i.e. its mass divided by its real volume) was revealed. The equilibrium apparent density of the swollen PDMS increased with the increasing number of C-atoms of liquid alkanes and liquid density. For higher alkanes (C number > 10), the calculated equilibrium apparent density of the swollen polymer was thus higher than that of the dry polymer. The dimensional-based PDMS volumes of the swollen polymer were compared with those calculated by the volume-additivity rules. For each C<sub>6</sub>–C<sub>12</sub> linear alkane, the volume-additivity method overestimated the swollen polymer volumes compared to the experimentally determined ones. Such a finding indicates the non-ideal PDMS swelling character, which is not solely additive due to the force interactions between the polymer chains and solvent molecules and moving of polymer chains apart (free volume increases).</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126598"},"PeriodicalIF":5.3,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lucas Lima Bezerra, Pedro de Lima-Neto, Adriana Nunes Correia, Norberto de Kássio Vieira Monteiro
{"title":"Synergy effect of Ag nanoparticles and deep eutectic solvents in the CO2 capture process: A computational approach","authors":"Lucas Lima Bezerra, Pedro de Lima-Neto, Adriana Nunes Correia, Norberto de Kássio Vieira Monteiro","doi":"10.1016/j.molliq.2024.126517","DOIUrl":"10.1016/j.molliq.2024.126517","url":null,"abstract":"<div><div>The worsening of global warming has caused several problems for the planet, especially due to the high CO<sub>2</sub> emissions in the atmosphere. Then, it is necessary to find new ways or improve the ways already used to capture the CO<sub>2</sub> gas. This work reported through Molecular Dynamics (MD) simulations, the use of silver nanoparticles (AgNP) to improve the CO<sub>2</sub> capture in the ethaline (1ChCl:2E), reline (1ChCl:2U), and glyceline (1ChCl:2G) solvents. Furthermore, the effect of water addition also was simulated in the 2.5 and 5 % concentrations. The MD simulations indicated that the AgNP presence in the three solvents occasioned increased hydrogen bonds (HB) between the CO<sub>2</sub> gas and species acting as hydrogen bond donors (HBD), resulting in a reduction of interaction potential values for this group, resulting in improvement of CO<sub>2</sub> process capture, especially for the AgNP-reline-CO<sub>2</sub> system. Furthermore, the structural analysis from MD simulations suggested that ethylene glycol and urea are the key species in the CO<sub>2</sub> capture process for the AgNP-ethaline-CO<sub>2</sub> and AgNP-reline-CO<sub>2</sub> systems, respectively. For the AgNP-glyceline-CO<sub>2</sub> system, the structural analysis indicates that the AgNP is the key species in the CO<sub>2</sub> process capture. Analyzing the increase in the water effect, it was observed that the CO<sub>2</sub> capture process worsened, especially with the highest water concentration.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126517"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ruei-Min Chuang , Trung Hieu Vo , Heng-Kwong Tsao , Yu-Jane Sheng
{"title":"High-strength poly(vinyl alcohol) physical eutectogels: Effects of polymer molecular weight, DES composition, and heat treatment","authors":"Ruei-Min Chuang , Trung Hieu Vo , Heng-Kwong Tsao , Yu-Jane Sheng","doi":"10.1016/j.molliq.2024.126592","DOIUrl":"10.1016/j.molliq.2024.126592","url":null,"abstract":"<div><div>A one-step manufacturing process is employed to fabricate stretchable physical eutectogels. It involves directly mixing polyvinyl alcohol (PVA) with choline chloride as a hydrogen bond acceptor and either ethylene glycol or glycerol (Gly) as a hydrogen bond donor. This process results in the formation of numerous crystallite domains of PVA within the deep eutectic solvent (DES), which act as physical crosslinking points in the eutectogel. The study systematically investigates the effects of PVA molecular weight, DES composition, and various heat treatments on the mechanical properties of eutectogels. The stress–strain curves demonstrate that a higher PVA molecular weight, the addition of Gly to the DES, and repeated freeze–thaw cycles can enhance the mechanical properties of the PVA physical eutectogel. Finally, scanning electron microscopy and X-ray diffraction are used to examine and analyze the polymer networks and crystallite domains in terms of pore size, crystallinity, and crystallite domain size.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126592"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ján Marták , Fiona Mary Antony , Tibor Liptaj , Milan Polakovič , Štefan Schlosser
{"title":"Extraction of butyric acid by novel hydrophobic phosphonium carboxylates with a pour point below 273 K and enhanced biocompatibility","authors":"Ján Marták , Fiona Mary Antony , Tibor Liptaj , Milan Polakovič , Štefan Schlosser","doi":"10.1016/j.molliq.2024.126569","DOIUrl":"10.1016/j.molliq.2024.126569","url":null,"abstract":"<div><div>Four new hydrophobic phosphonium carboxylate ionic liquids (ILs) were synthesized: tetradecyltrihexylphosphonium 2-butyloctanoate ([C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][2-BOct]), tetradecyltrihexylphosphonium 2-hexyldecanoate ([C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][2-HDec]), dodecyltrioctylphosphonium 2-butyloctanoate ([C<sub>12</sub>C<sub>8</sub>C<sub>8</sub>C<sub>8</sub>P][2-BOct]), and dodecyltrioctylphosphonium bis(2,4,4-trimethylpentyl)phosphinate ([C<sub>12</sub>C<sub>8</sub>C<sub>8</sub>C<sub>8</sub>P][BTMPP]). These ILs exhibit high extraction efficiency for carboxylic acids, comparable to commercially available phosphinate and decanoate ILs [C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][BTMPP] and [C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][Dec]. The pour point of the new dry ILs with branched carboxylate anions is below 255 K, providing technological advantages, while decanoate IL has a pour point above 308 K. In a water-saturated state, the viscosity of ILs [C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][2-BOct] and [C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][2-HDec] is similar or only slightly higher compared to decanoate IL and [C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P][neodecanoate], synthesized previously. However, except for decanoate IL, all studied carboxylate ILs with [C<sub>14</sub>C<sub>6</sub>C<sub>6</sub>C<sub>6</sub>P<sup>+</sup>] cation are toxic to <em>Bacillus coagulans.</em> ILs with a larger [C<sub>12</sub>C<sub>8</sub>C<sub>8</sub>C<sub>8</sub>P<sup>+</sup>] cation are biocompatible with <em>Bacillus coagulans</em>. Dry ILs with phosphinate anions [BTMPP] have higher viscosity compared to carboxylate ILs, complicating their use in separations. The viscosity of [C<sub>12</sub>C<sub>8</sub>C<sub>8</sub>C<sub>8</sub>P][2-BOct] is lower compared to phosphinate IL and slightly higher compared to decanoate IL. New carboxylate ILs with branched alkyl chains of anions and [C<sub>12</sub>C<sub>8</sub>C<sub>8</sub>C<sub>8</sub>P<sup>+</sup>] cation demonstrate favourable properties, making them promising candidates for various applications, especially in situations when low solubility in water, good biocompatibility, and advantageous pour points are essential considerations.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126569"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zoltan Horvath , David Juriga , Akos Gyorgy Juhasz , Judit Domokos , Dora Szabo , Krisztina Juriga-Toth , Anna Salvati , Angela Jedlovszky-Hajdu
{"title":"Biological effect of Zn-loaded polysuccinimide nanofibers on cells and bacteria","authors":"Zoltan Horvath , David Juriga , Akos Gyorgy Juhasz , Judit Domokos , Dora Szabo , Krisztina Juriga-Toth , Anna Salvati , Angela Jedlovszky-Hajdu","doi":"10.1016/j.molliq.2024.126588","DOIUrl":"10.1016/j.molliq.2024.126588","url":null,"abstract":"<div><div>Antimicrobial resistance (AMR) poses a serious threat to modern medicine by reducing the effectiveness of current treatments. This makes it harder to manage infections, such as those in wound healing, as standard antibacterial agents become less effective. To address this, new treatments, like metal salts and nanoparticles, are needed, which can be incorporated into polymer-based wound dressings. In this study, we developed nanofibrous meshes based on biocompatible and biodegradable polysuccinimide (PSI) incorporating varying compositions of zinc-oxide (ZnO) nanoparticles and zinc-chloride, aimed at localized treatment of bacterial infections. ZnO nanoparticles were synthesized <em>in situ</em> in organic solvents, enabling their direct mixing with PSI solutions for electrospinning into nanofiber-based meshes. Comprehensive physicochemical analyses of the different meshes were performed, and their antibacterial efficacy was evaluated against two Gram-positive and two Gram-negative bacterial strains relevant to wound healing. Additionally, a detailed concentration-dependent cytotoxicity assay was performed using a human cell line to establish the effective concentration range. Zn-loaded PSI meshes are effective against Gram-positive bacteria but less so against Gram-negative strains, suggesting their potential use as wound dressing materials.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126588"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"CO2 capture and viscosity of metal chelate-based ionic liquids: Influence of the structure and substitution of the azole-based anion","authors":"Bin Chen , Hegang Shu , Yujun Guo , Yingjie Xu","doi":"10.1016/j.molliq.2024.126574","DOIUrl":"10.1016/j.molliq.2024.126574","url":null,"abstract":"<div><div>In this work, the effect of the structure and substitution of azole-based anion on the CO<sub>2</sub> capture and viscosity (<em>η</em>) of metal chelate-based dual functional ionic liquids (DFILs) with [K(DGA)<sub>2</sub>]<sup>+</sup> cation was investigated. The CO<sub>2</sub> absorption capacity of DFILs at 0.1 MPa and 333.2 K shows that methyl and nitro groups on the azole-based anion, such as pyrazolide ([Pyr]<sup>−</sup>) and imidazolide ([Im]<sup>−</sup>), attenuate their reactivity with CO<sub>2</sub> through the steric hindrance and electron-withdrawing effects, respectively. Furthermore, the CO<sub>2</sub> absorption capacity of [K(DGA)<sub>2</sub>][Pyr] is larger than that of [K(DGA)<sub>2</sub>][Im], which is due to the interaction of the two adjacent N atoms in the [Pyr]<sup>−</sup> anion with CO<sub>2</sub>, as confirmed by DFT calculations. The CO<sub>2</sub> absorption mechanism shows that both [Pyr]<sup>−</sup> anion and [K(DGA)<sub>2</sub>]<sup>+</sup> cation of [K(DGA)<sub>2</sub>][Pyr] can chemically interact with CO<sub>2</sub>, making its saturated uptake at 333.2 K as high as 1.47 mol CO<sub>2</sub> per mole IL. Moreover, CO<sub>2</sub> interacts preferentially with [Pyr]<sup>−</sup>, and the [K(DGA)<sub>2</sub>]<sup>+</sup>–CO<sub>2</sub> interaction is enhanced when the CO<sub>2</sub> uptake is greater than 0.5 mol CO<sub>2</sub> per mole IL. <em>η</em> of pure [K(DGA)<sub>2</sub>][Pyr] is lower than that of pure [K(DGA)<sub>2</sub>][Im]. <em>η</em> of [K(DGA)<sub>2</sub>][Pyr] increases with the increase of CO<sub>2</sub> absorption, and the rapid increase in <em>η</em> after CO<sub>2</sub> uptake greater than 0.5 is attributed to the formation of [K(DGA)<sub>2</sub>]<sup>+</sup>–CO<sub>2</sub> interactions.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126574"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sajid Ullah , Saddam Hussain , Sidra , Nowshad Ali Shah , Waqas Ahmad , Takashiro Akitsu
{"title":"Graphene oxide and hydroxyapatite-based composite extracted from fish scales: Synthesis, characterization and water treatment application","authors":"Sajid Ullah , Saddam Hussain , Sidra , Nowshad Ali Shah , Waqas Ahmad , Takashiro Akitsu","doi":"10.1016/j.molliq.2024.126577","DOIUrl":"10.1016/j.molliq.2024.126577","url":null,"abstract":"<div><div>In this study the removal of hydrocarbon pollutants from refinery waste water has been described through a convenient adsorption technique using a novel composite of graphene oxide (GO) and n-hydroxyapatite (n-HAp). The main aim was to synthesized composite which are not only sustainable and biodegradable but also exhibit high adsorption capacity and selectivity for hydrocarbon pollutants. Both the HAp and GO were synthesized from fish scales in the laboratory. The synthesized material was then characterized by XRD, FTIR, SEM, and EDX. At 40 °C and 80 min of reaction time, the adsorbent utilized in a batch mode study attained a maximum 97 % organic pollutant adsorption rate. The adsorption activity was spontaneous, exothermic, useful, and it adhered to the pseudo-2nd order kinetic model. without noticeably losing its activity, the adsorbent retained a high level of efficiency over four consecutive cycles. Adsorption of hydrocarbon wastes using composite adsorbent was carried out under batch mode of adsorption experiments. We also studied the effect of dose, temperature, time and pH of the solution on adsorption. Ethanol was used to regenerate the adsorbent, and it was then dried at 70 °C for re-use. The SEM investigation showed that the morphology of huge caves is rough, layered, and wrinkled. The oxygen and phosphate containing groups were found via FT-IR analysis. Freundlich and Langmuir kinetic models were used to measure the adsorption behavior by applying them to the adsorption data. The results demonstrated a strong correlation between the Freundlich isotherm model and the real data. This study showed a highly effective and cost-efficient methodology for the removal of toxic hydrocarbon contaminants in refinery wastewater.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126577"},"PeriodicalIF":5.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}