Journal of Environmental Chemical Engineering最新文献

{"title":"Multimodal applications of green carbon dots derived from Potentilla indica (mock strawberry): Antioxidant, antimicrobial, and quenching based quercetin sensor","authors":"Neha Sharma ,&nbsp;Hae-Jeung Lee","doi":"10.1016/j.jece.2024.114216","DOIUrl":"10.1016/j.jece.2024.114216","url":null,"abstract":"<div><div>This study utilized a simple hydrothermal technique to synthesize negatively charged carbon dots from <em>Potentilla indica</em> fruit (MSTCDs) with antioxidant and broad-spectrum antimicrobial properties, as well as a specific capacity to detect quercetin. The characterization of MSTCDs was performed using spectrophotometry (UV–vis, fluorescence, X-ray photoelectron, and Fourier-transform infrared), zeta potential, and transmission electron microscopy. The prepared MSTCDs had an average size of 8 ± 0.22 nm and zeta potential of −21 mV. The prepared MSTCDs showed negligible cytotoxicity and were found to be biocompatible with human microglial cells. MSTCDs used the static quenching and inner filter effect as their two sensing mechanisms to detect quercetin. The fluorescence intensity of the MSTCDs decreased as the dose of quercetin increased, showing a linear correlation within the dose range of 0.01–70 μM (R² = 0.9980) and the lowest detection limit of 2 nM. The prepared MSTCDs were applied to detect quercetin in the orange and grape juice, yielding values of 3.27 and 7.04 μM, respectively. Further, the MSTCDs displayed antioxidant activity by scavenging 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), 2,2-diphenyl-1-picrylhydrazyl, and hydroxyl radicals, with an EC₅₀ value of 9.3, 140.82, and 187.91 µg/mL, respectively. The antiradical activity of MSTCDs was slightly lower than the ascorbic acid except for ABTS radicals, where MSTCDs showed superior scavenging ability (EC₅₀ = 9.3 µg/mL) compared to the control (EC₅₀ = 33.7 µg/mL). MSTCDs exhibited dose-dependent antimicrobial activity against fungi, Gram-negative bacteria, and Gram-positive bacteria. Thus, the developed CDs showed potential as antioxidant, antimicrobial, and quenching-based quercetin sensor.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114216"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistically achieving particulate matter reduction and production performance optimization for zinc electrolysis by ultrasonication coupling anode-coated MnO2","authors":"Yanhui Wang,&nbsp;Lingyu Li,&nbsp;Xiyu Jiang,&nbsp;Haiteng Zhang,&nbsp;Xiaocan Bai,&nbsp;Yuhan Huang,&nbsp;Ting Liu,&nbsp;Yan Tan,&nbsp;Zizhen Ma,&nbsp;Huawei Zhang","doi":"10.1016/j.jece.2024.114223","DOIUrl":"10.1016/j.jece.2024.114223","url":null,"abstract":"<div><div>Abating particulate matter (PM) from electrolysis processes is significant because this PM poses occupational threats to workers and has a negative impact on air quality. However, it remains a challenge to synergize the reduction of PM production and the improvement of electrolysis performance. This study developed a green method, termed as the coupling of ultrasonication and pre-coating MnO₂ anode treatment (UMT). The effects on PM generation rate and electrolysis performance indicators were estimated using the bench-scale zinc electrolysis device, and the synergistic mechanism of UMT was expanded from the perspective of electrochemical reactions and bubble characteristics using analysis of reaction products, camera technique, and PM generation prediction models. The results showed UMT not only overcame the degradation of deposited zinc quality caused by the ultrasonication treatment but also solved the increased PM generation by the pre-coating MnO₂ film treatment. The UMT simultaneously reduced PM (33.9 %-57.5 %), decreased zinc impurity content by (11.2 %-54.3 %), improved current efficiency of zinc deposition (0.19 %-1.71 %), and conserved electrolysis energy (0.27 %-1.01 %). The optimal performance of UMT occurred at 80 kHz. The UMT suppressed the gas evolution reactions and prematurely bursting bubbles, in favor of reducing the number and size of bubbles, to reduce PM generation. Meanwhile, the UMT improved the electrolysis performance by inhibiting the corrosion of lead-based anodes, promoting the mass transfer rate of Zn²⁺, providing more active surfaces, and decreasing the overpotential of reactions. The findings may provide references for the green development of the metal electrolysis industry.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114223"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of alkaline washing pretreatment on municipal solid waste incineration fly ash (MSWI FA) and resulting geopolymers","authors":"Dehua Liang ,&nbsp;Liangdong Zou ,&nbsp;Fengyu He ,&nbsp;Yang Xu ,&nbsp;Lang Tao ,&nbsp;Fei Wang ,&nbsp;Guojun Lv","doi":"10.1016/j.jece.2024.114230","DOIUrl":"10.1016/j.jece.2024.114230","url":null,"abstract":"<div><div>The safe disposal and utilization of municipal solid waste incineration fly ash (MSWI FA) has emerged as a crucial challenge, primarily due to elevated levels of heavy metals and chlorides. In this study, the influence of key factors in different pretreatment methods on the physicochemical properties of MSWI FA was analyzed, and the effects and mechanism of different pretreatment methods on the resulting geopolymers were studied. Under the conditions of a liquid-solid ratio (L/S) of 7 mL/g, a rotational speed of 500 r/min, and a stirring time of 20 min, the alkali washing with 1 mol/L NaOH solution exhibited better effect than water washing. The total content of chlorides and the content of soluble chloride in AFA (MSWI FA with alkali washing) were 1.53 % and 0.85 %, respectively. Alkali washing had a greater influence on the migration of heavy metals from MSWI FA to filtrate than water washing. Meanwhile, alkaline washing exhibited better effect in calcium retention and sulfur removal. The pretreatment process enhanced the gel formation in geopolymers, subsequently exerting a significant influence on the compressive strength and leaching concentration of heavy metals. Thermogravimetric analysis showed the bound water content in AG (8.46 %) was the greatest in all simples, indicating that exerted the most pronounced impact on the gel formation during geopolymerization. And, the lower ratio of Si-O-Na to Si-O-T in AG (0.20) indicated a longer geopolymeric chains, which explained the higher compressive strength of geopolymers during the initial curing period. This article provides a new pretreatment method to promote the resource utilization of MSWI FA.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114230"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 capture performance of AMP-EAE amine blends: Absorption in the microchannel and desorption from saturated solutions","authors":"Yaxuan Zhen,&nbsp;Chunying Zhu,&nbsp;Taotao Fu,&nbsp;Youguang Ma","doi":"10.1016/j.jece.2024.114131","DOIUrl":"10.1016/j.jece.2024.114131","url":null,"abstract":"<div><div>Blended organic amine solutions are considered an effective strategy for developing highly efficient and low energy-consuming absorbents due to the possibility of combining the advantages of single amine. The 2-amino-2-methyl-1-propanol (AMP) and 2-(ethylamino)ethanol (EAE) amine blends were prepared in three molar ratios: blend-1 (<em>n</em>_AMP:<em>n</em>_EAE = 3:1), blend-2 (<em>n</em>_AMP:<em>n</em>_EAE = 1:1), and blend-3 (<em>n</em>_AMP:<em>n</em>_EAE = 1:3). The impacts of gas-liquid flow rate, amine concentration, molar ratio, temperature, and CO₂ concentration on absorption performance were investigated using the serpentine microchannel. Additionally, the effects of amine concentration and molar ratio on the desorption performance of saturated solutions were also explored. The performance of amine blends in absorption and desorption was evaluated by measuring absorption rate, efficiency, and loading, as well as desorption efficiency, energy consumption, cycle capacity, and average desorption rate. The desorption results were compared to those of the benchmark solvent, 30 wt% MEA, under identical operating conditions. The results indicate that the 25 wt% blend-2 solution performs exceptionally well, exhibiting a 15 % increase in absorption efficiency compared to the AMP aqueous solution at a gas-liquid ratio of 20. Additionally, the cycle capacity and average desorption rate are 1.7 times higher than those of the 30 wt% MEA solution. Notably, the energy consumption of the 25 wt% blend-2 solution for desorption is only 60 % of the 30 wt% MEA solution.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114131"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Barium titanate/ZnAl-layered double hydroxide catalysts for piezoelectrically enhanced photocatalytic degradation of coexisting pollutants and antibiotic resistance genes","authors":"Jiangfu Zheng ,&nbsp;Zhuo Zeng ,&nbsp;Xiaoming Li ,&nbsp;Qi Yang ,&nbsp;Dongbo Wang ,&nbsp;Abing Duan ,&nbsp;Shuaijun Pan","doi":"10.1016/j.jece.2024.114227","DOIUrl":"10.1016/j.jece.2024.114227","url":null,"abstract":"<div><div>Composite materials consisting of BaTiO₃/ZnAl-layered double hydroxide (LDH) were synthesized utilizing a combination of self-assembly and hydrothermal techniques, displaying outstanding piezoelectric characteristics. When subjected to ultrasonic vibration and visible light (VSL) irradiation, these composites demonstrated superior piezoelectric photocatalytic capabilities, achieving degradation rates of 99 % for NTP and a complete 100 % for TC within a span of 45 minutes. The presence of ultrasonic vibration induces polarized electric fields within the ZnAl-LDH and BaTiO₃ components. These fields support the maintenance of the intrinsic electric field strength across the heterojunction interfaces, facilitating the expedited migration of photogenerated carriers. Consequently, this enhances the efficiency of carrier separation and fosters a synergistic catalytic effect attributed to dual piezoelectricity when exposed to VSL. This investigation highlights the potential of piezoelectric photocatalysis in efficiently removing pollutants, suggesting its applicability in the treatment of municipal wastewater and sterilization processes, and offers innovative perspectives for advancing piezoelectric photocatalyst development.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114227"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights into novel phosphorus-doped biochar for tetracycline removal: Non-radical oxidation and adsorption","authors":"Xi Fu ,&nbsp;Xiaojun Niu ,&nbsp;Dongqing Zhang ,&nbsp;Ling Li ,&nbsp;Xingyao Ye ,&nbsp;Shan Liao ,&nbsp;Maoyu Li ,&nbsp;Chuting Lao ,&nbsp;Deye Chen ,&nbsp;Yu Lin ,&nbsp;Zhiquan Yang","doi":"10.1016/j.jece.2024.114224","DOIUrl":"10.1016/j.jece.2024.114224","url":null,"abstract":"<div><div>Heteroatom doping has been widely recognized as an emerging and promising strategy for material enhancement and the degradation of organic pollutants. However, most heteroatom doping biochars are used to activate, for example, PMS to generate reactive oxygen species (ROS) to degrade organic pollutants instead of investigating their own ability to produce ROS. Herein, phosphorus-doping biochars (PBC) were synthesized at various temperatures for adsorption and degradation of tetracycline (TC). Compared to the pristine biochar (BC-800), PBC-800 exhibited significant enhancements in the specific surface areas (1307.30 m²·g⁻¹), porosity (0.94 cm³·g⁻¹) and higher removal efficiency (1.25 times higher than BC-800). The abundance of functional groups in the PBC-800 such as electron-rich ketone functional groups (C<img>O), phosphorus-oxygen moieties (P-O), and defective sites within the carbon matrix, have been identified to play crucial roles in TC degradation. The free radical quenching and analysis of electron paramagnetic resonance (EPR) indicated that the presence of persistent free radicals (PFRs) on PBC also influenced the TC removal, and the possible non-radical pathways were proposed. The density functional theory (DFT) calculations proved that PBC-800 exhibited the highest adsorption energy as well as the lowest energy gap between triplet O₂ and ¹O₂, suggesting that the existence of P was conducive to the production of ¹O₂. This study laid the groundwork for the development of biochars and provided a novel insight into the design of green biomass for effective removal of antibiotics in the future.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114224"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of 2,3-butanediol from Ulva pertusa hydrolysate using hydrothermal pretreatment followed by enzymatic hydrolysis","authors":"Du Eon Kim,&nbsp;Gwi-Taek Jeong","doi":"10.1016/j.jece.2024.114225","DOIUrl":"10.1016/j.jece.2024.114225","url":null,"abstract":"<div><div>This study aimed to evaluate the effectiveness of the marine macro-algae <em>Ulva pertusa</em> as a potential source of important chemicals, including 2,3-butanediol (2,3-BDO). This study examined how pretreatment conditions like liquid-to-solid ratio, reaction temperature, and reaction time influence the hydrolysis of <em>U. pertusa</em> biomass through hydrothermal pretreatment followed by enzymatic hydrolysis. Consequently, 23.44 g/L (12.7 % based on biomass weight) of reducing sugar was produced under hydrothermal pretreatment conditions (liquid-to-solid ratio of 6:1, reaction temperature of 165 °C, and reaction time of 15 min), followed by enzymatic hydrolysis. During hydrothermal pretreatment, the sugar concentration peaked at 3.68 g/L within the severity factor (SF) range of 3.5–4.4. During subsequent enzymatic hydrolysis, the sugar concentration remained stable until the SF reached 4.0. However, when SF exceeded 4.0, the sugar concentration rapidly decreased. The effectiveness of <em>U. pertusa</em> hydrolysate was evaluated via the fermentation of 2,3-BDO. <em>Pantoea agglomerans</em> successfully produced 2,3-BDO with a yield of 0.299 g/g-sugar from <em>U. pertusa</em> hydrolysate. In summary, this study demonstrated the effectiveness of <em>U. pertusa</em> hydrolysate as a bioresource for producing biochemicals, including 2,3-BDO.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114225"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrostatic self-assembly of hydrotalcite-based g-C3N4 composites for adsorption and photocatalytic degradation of aqueous norfloxacin","authors":"Xiaodong Yang ,&nbsp;Minghui Li ,&nbsp;Zhiyong Hou ,&nbsp;Xuefei Yang ,&nbsp;Yuanxia Guo ,&nbsp;Shuaiqi Luo ,&nbsp;Jin Zhao ,&nbsp;Kai Wang ,&nbsp;Pengkai Sun ,&nbsp;Qiang Yang ,&nbsp;Rui Chen ,&nbsp;Shuo Yang ,&nbsp;Xin Lu ,&nbsp;Lulu Liu ,&nbsp;Lili Wang ,&nbsp;Ye Han ,&nbsp;Fanming Zeng ,&nbsp;Bin Gao","doi":"10.1016/j.jece.2024.114226","DOIUrl":"10.1016/j.jece.2024.114226","url":null,"abstract":"<div><div>Norfloxacin, a quinolone antibiotic pollutant, posed a significant threat to environment and human being health. In this study, hydrotalcite-based g-C₃N₄ composites were produced using electrostatic self-assembly and the structural memory effect of hydrotalcite to optimize their adsorption-degradation of norfloxacin under visible-light illumination. Optimized hydrotalcite and g-C₃N₄ composite (750°C, 40 wt% of g-C₃N₄) exhibited a highest photo-degradation rate constant of 1.8×10⁻² min⁻¹ with 83.98 % norfloxacin degradation achieved within 1.5 h under visible-light, surpassing that of bare g-C₃N₄ and hydrotalcite photocatalysts. The synergistic effects of the composite, such as uniform flower-like micro-morphology and rich mesoporous structure, resulted in a large specific surface area (58.67 m²/g), abundant active sites, and good photo-generated charge separation efficiency. All these facilitated both sorption (7.95 mg/g) and subsequent visible-light degradation of norfloxacin. Furthermore, the superior photocatalytic performance observed in the degradation of norfloxacin under visible-light illumination was assigned to the effective transport of photogenerated electrons and holes between hydrotalcite and g-C₃N₄ components. The work highlights the potentials of hydrotalcite and g-C₃N₄ composites as an excellent photocatalyst for environment remediation and water treatment.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114226"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial conversion characteristics of sulfur and nitrogen via desulfurization denitrification under rapidly changing hydraulic conditions","authors":"Wei Li ,&nbsp;Shuai Zhao ,&nbsp;Yu Zhang ,&nbsp;Jinying Chen ,&nbsp;Jiayu Li ,&nbsp;Nan Li ,&nbsp;Ruonan Xin ,&nbsp;Ping Guo ,&nbsp;Hang Yu ,&nbsp;Xiuchen Bing","doi":"10.1016/j.jece.2024.114217","DOIUrl":"10.1016/j.jece.2024.114217","url":null,"abstract":"<div><div>The sulfur-nitrogen-contained wastewater treatment system needs fast start-up, efficient collaboration, and stability, to break through the application bottleneck of biological desulfurization-denitrification. An integrated sleeve bioreactor was adopted to analyze the coupling performances of sulfate-reduction and sulfide-based denitrification process. The spatial-temporal distribution of functional bacteria and genes was studied under rapidly changing hydraulic conditions. The transformation law of carbon-sulfur-nitrogen was clarified. The removal efficiencies of sulfate, total organic carbon, and nitrite reached 90 %, 98 %, and 99 %, respectively. <em>Thermovirga, Desulfomicrobium</em> and <em>Desulfobulbus</em> were the main functional bacteria in the external sleeve, while <em>Sulfurovum</em> and <em>sulfurimonas</em> were in the internal sleeve. The dominant functional genes sat, sqr, norBC, and nosZ had relative abundances of 1.02 ‰, 3.09 ‰, 0.63 ‰ and 0.51 ‰, respectively. The sleeve alleviated the toxic effects of sulfide and nitrite. It realized the spatial separation and enrichment of different dominant bacteria, improving the load shock resistance of bioreactor. The rapidly changing hydraulic retention time promoted the spatial transference of sulfate-reducing bacteria and brought the appearance of sulfide-based denitrification bacteria in external sleeve. It enhanced the stability of microbial community structure. This optimized microbial community structure provided a rich diversity of functional genes to ensure a collaborating degradation of sulfur and nitrogen. The main transformation pathways included the assimilated sulfate reduction, sulfur partial oxidation and denitrification. Rapidly decreasing hydraulic retention time facilitated the accumulation of elemental sulfur. The unique structure and operation exhibited strong resistance to loads and hydraulic shocks. This work provides a reference value for efficiently removing multiple pollutants in sulfur-nitrogen-polluted wastewater.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114217"},"PeriodicalIF":7.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Durable underwater superoleophobic hydrogels for oil- and Cu(II)-containing water purification","authors":"Chang-Lian Xu ,&nbsp;Na Ji ,&nbsp;Xingyue Wu ,&nbsp;Xiaoxun Xu ,&nbsp;Guiyin Wang ,&nbsp;Zhanbiao Yang ,&nbsp;Zhang Cheng ,&nbsp;Shirong Zhang ,&nbsp;Ting Li ,&nbsp;Pietro Paolo de Oliveira e Silva ,&nbsp;Guochun Lv ,&nbsp;Junzhuo Cai ,&nbsp;Xin Qi","doi":"10.1016/j.jece.2024.114215","DOIUrl":"10.1016/j.jece.2024.114215","url":null,"abstract":"<div><div>Purifying oily and Cu²⁺ ions-containing waste waters is still a challenge over the world. Traditional adsorption materials struggle to efficiently remove both pollutants. In this study, an underwater superoleophobic polyvinyl alcohol (PVA) and tannic acid (TA) based PVA-TA hydrogel was first prepared for the removal of both oils and Cu(II) ions. CaCO₃ was subsequently incorporated to enhance the mechanical properties and Cu²⁺ adsorption capacities through electrostatic attractions. Both PVA-TA and PVA-TA/CaCO₃ hydrogel-intermediated materials exhibited underwater superoleophobic and can be used to purify oily water, achieving separation efficiencies exceeding 99.20 % even after 60 cycles. Furthermore, these materials demonstrated excellent self-cleaning performance against viscous oil. The addition of CaCO₃ can also improve the mechanical durability and chemical resistance of the PVA-TA under robbing, varying pH levels, and saline conditions. Moreover, the maximum Cu(II) adsorption capacity and removal efficiency of the PVA-TA/CaCO₃ are 62.11 mg g⁻¹ and 86.71 %, respectively; surpassing those of the PVA-TA due to increased micro-hole density and electrostatic interactions between CaCO₃ and Cu(II). These porous materials can be further applied to purify real-life wastewater, indicating their potential for efficient practical wastewater treatment. This work not only provides effective porous materials for purifying oily and Cu²⁺-containing waste waters but also improves a simple method for preparing underwater superoleophobic hydrogel-intermediated materials.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114215"},"PeriodicalIF":7.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}