JOURNAL OF SOLID STATE CHEMISTRY
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2021
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IF 3.498
Abid Hussain Shah,Chen Yuan,Weiyi Hao,Wenhao Gu,Shuyu Liang,Zain Ul Abideen,Fazli Wahid,Fei Teng
In this work, we mainly investigate the adsorption properties of the simulated single and mixture wastewaters over porous Bi 2 MoO 6 @BiOCl@MOF-199 (BMO@BOC@MOF-199), including methylene blue (MB), rhodamine blue (RhB), methyl orange (MO) and chromium (VI). It is found that BMO@BOC@MOF-199 has a high adsorption capacity for MB, but a poor adsorption capacity for MO. Specifically, for single MB solution, 67%, 80% and 96% of MB are adsorbed by BMO@BOC, MOF-199 and BMO@BOC@MOF-199, respectively. The higher adsorption capacity of BMO@BOC@MOF-199 could be due to its higher surface area and larger pore volume . For single MO solution, nevertheless, only 16%, 13% and 7% of MO are adsorbed by BMO@BOC, MOF-199 and BMO@BOC@MOF-199, respectively. The different adsorption efficiency for MB and MO could be relative to their different molecular structures, which have different electrostatic interactions with adsorbent surface. For single RhB and single Cr(VI) solution, BMO@BOC@MOF-199 has adsorbed 30% RhB and 10% Cr(VI). In RhB-MO mixture solution, 32% RhB and 9% MO can be adsorbed by BMO@BOC@MOF-199, while in Cr(VI)–RhB-MO mixture solution, 7% Cr(VI), 3% RhB and 42% MO can be adsorbed by BMO@BOC@MOF-199. It is seen that in RhB-MO mixture solution, the adsorption efficiencies of RhB and MO by BMO@BOC@MOF-199 do not obviously change as compared to single RhB and single MO solution, while in Cr(VI)–RhB-MO mixture solution, the adsorption efficiency of MO has increased by 5 times, compared to single MO solution; but the adsorption efficiency of RhB has decreased by 9.7 times as compared to single RhB solution, and the adsorption efficiency of Cr(VI) has decreased slightly, compared to single Cr(VI) solution. The results are mainly attributed to the competitive adsorption on the adsorbent surface. This work can help us to understand the adsorption process for practical wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Zhang Youkui,Deng Ruojing,Zeng Junbo,Shi Fanyue,Yang Sanquan,Wu Yingshuo,Duan Tao
In this work, a novel phosphorus functionalized carbon nitride (PCN) was designed and synthesized by a pyrolysis method for rapid adsorption of uranium. The optimized sample obtained at 600 °C (marked as PCN-600) exhibited the highest ability for uranium adsorption with efficiency of over 96% in only 1 min. The PCN-600 also exhibited high selectivity for uranium adsorption from simulated wastewater containing multiple interfering ions. The characterization results further revealed that the main adsorption mechanism of the uranium on PCN-600 is chemisorption. This work provides newly insight into adsorbent design for uranium removal from wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Qiong Liu,Yuhan Xu,Xinghang Li
Nitrogen-rich porous carbon (NPC) material was prepared from peony seed shell by one-step pyrolysis, and the physicochemical properties were characterized. The results showed that the as-prepared material had high surface area (3,509.1 m 2 ·g –1 ) and abundant functional groups containing nitrogen and oxygen. The NPC material displayed excellent adsorption capacity ( q e = 750 mg·g –1 ) for tetracycline (TC) even at pH = 3~11 or in the presence of salt ions ( C . NasSO4/NaCl=0 1 ~ 0.5 mol L –1 ) . With Langmuir and pseudo-second-order models, the adsorption process of being spontaneous and endothermic could be satisfactorily described and the adsorption capability was derived to be about 892.7 mg·g –1 at 25°C. The saturated NPC was regenerated by pyrolysis technology and used in the treatment of TC simulated wastewater. After 4 cycles, the adsorption amount of TC on NPC still remained above 500 mg·g –1 . Combined with the characterization analysis, it could be inferred that the adsorption of TC by NPC benefited from the high specific surface area and hierarchical pore structure of NPC, in addition to the active groups such as carbonyl, graphite-nitrogen and sp 2 carbon on its surface.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Ting Su,Mengdan Wang,Bozhou Xianyu,Kui Wang,Pingqiang Gao,Cuiying Lu
The Co 3 O 4 –Ti electrodes were successfully prepared via calcination method to degrade nitrogen-containing (TNP) simulate wastewater in this reaserch. SEM and EDS were employed to analyze the morphology and element composition on Co 3 O 4 –Ti electrode, revealing the successful load of cobalt element. Then the electrochemical performance was evaluated by CV and indicated a better redox performance of electrode. Furthermore, five factors as processing time (A), electrolyte concentration (B), pH (C), initial concentration of TNP (D), and current density (E) were systematic studied in electrical treatment process. The removal rate of TN could be 77%. After the optimization work by RSM, the removal rate of TN raised up to 81% with the condition as: A of 180 min, B of 0.05 M, C of 3, D of 400 mg L −1 , and E of 20 mA cm −2 . The sequence of significants is: C > D > A > E > B. Mechanism analysis revealed that the entire process could be divided into two stages. In the first stage, organic nitrogen compounds were converted into inorganic nitrogen species, such as NO 3 –N. The oxidation and reduction would react owing to the generating of ·OH at second stage in order to turn the NO 3 –N into NO 2 –N, NH 4 –N or N 2. The activation of ·OH on the surface of Co 3 O 4 –Ti electrode possesses the exothermic nature with transition theory. The energy calculation of 1.168 eV indicated these reactions could occur spontaneously.
研究领域:
环境科学
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电化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuyang Wang,Yao Tian
Designing and developing a uranium adsorbent with high adsorption capacity and good selectivity is highly significant. We synthesized a novel hyper-cross-linked polymer adsorbent with bifunctional groups, (PHCP-4-AO), such as phosphate and amidoxime groups, via simple Scholl reaction and subsequent functionalization for the first time highly efficient extraction of U(VI) from aqueous solution. Due to its unique molecular structure design, it can enhance the selectivity and adsorption capacity of uranium by using two different functional groups. The maximum uranium adsorption capacity of PHCP-4-AO was 424.33 mg/g, which was higher than the single-functional group phosphorylated (PHCP-4) (315.43 mg/g) and amidoximated (HCP-4-AO) (260.38 mg/g) adsorbents. The combination of phosphate and amidoxime groups improves the adsorption effect. PHCP-4-AO has good selectivity and affinity for uranyl ions. In simulated wastewater, the K d of PHCP-4-AO for uranium was 7266.3 mL/g, which was more than 15 times that of other ions. After three adsorption–desorption cycles, the adsorption capacity of PHCP-4-AO can still be maintained above 300.00 mg/g. Through XPS analysis, it is speculated that the sorption of uranium by PHCP-4-AO is owing to the lone pair electrons found on the oxygen atom of the phosphate groups, as well as the oxime oxygen and amino nitrogen atoms of the amidoxime groups entering the uranium’s empty orbit to form the coordination bonds. These findings demonstrated that this new hyper-cross-linked polymer could be considered as a valuable material in the extraction and recovery of uranium from uranium-containing aqueous solutions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2019
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IF 0
Alemtsehay Tesfay Reda,Dongxiang Zhang
Selective Removal of metal ions from simulated wastewater by sulfonated calix[4]arene intercalated with layered double hydroxide (SC4A-NO 3 -LDH) is reported in the present paper. The SC4A-NO 3 -LDH exhibited high adsorption performance towards metal ions with selectivity order of Fe(III) > Cu(II) > Pb(II) > Ag(I) for heavy metal ions, and Eu(III) > Nd(III) > La(III) for rare earth metal ions. Kinetics of Fe 3+ , Cu 2+ and Eu 3+ were found to follow pseudo-second-order reaction, suggesting chemisorption mechanism. Efficient sorption, with 100% removal rate and 3.80 × 10 7 mL/g distribution coefficient ( K d ) towards Fe(III) is typical potential of SC4A-NO 3 -LDH. For Cu 2+ and Eu 3+ ions sorption, K d values of 1.03 × 10 6 and 7.25 × 10 6 mL/g, and removal rates of 99.88 and 99.98%, respectively, were obtained. 0.005 g of SC4A-NO 3 -LDH was enough to lower 2.6 ppm of Fe 3+ –< 1 ppb. After the sorption, samples were characterized by analytical methods such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform Infrared spectroscopy (FTIR) and proved that the target ions on their respective samples. XRD and FTIR were also used to check the stability of the samples after sorption.
研究领域:
环境科学
·
材料化学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）