ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
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2026
·Vol. 48
·期 3
·145
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IF 4.3
Yin Yanjun,Bai Mengjie,Wang Wenxu,Zhao Xiaotian,Yuan Weide,Li Yongwei,Yan Yuying,Feng Yujie,Zhu Wenjie,Wang Xinyu,Fang Zhihao,Zhang Wei
Phenolic resin waste (PRW) is a carbon-rich industrial byproduct, and its improper disposal leads to environmental pollution and resource loss. In this study, a porous carbon material (PRWPC) with a well-developed porous structure and a large specific surface area (1760.6107 m 2 g −1 ) was prepared from PRW via microwave-assisted alkaline activation and applied for methylene blue (MeB) removal from aqueous solution. Under the optimized conditions with an initial MeB concentration of 100 mg L −1 , an adsorbent dosage of 10 mg, a contact time of 40 min, a temperature of 328 K, and pH = 11, PRWPC exhibits high adsorption performance, achieving a maximum adsorption capacity of 1482.35 mg g −1 with a removal efficiency of 98.8%. Kinetic analysis indicates that the adsorption process follows a pseudo-second-order model, while equilibrium data are well described by the Langmuir isotherm, suggesting monolayer adsorption dominated by micropore filling. Thermodynamic analysis reveals that the adsorption process is spontaneous and endothermic. Overall, this study demonstrates that microwave-assisted conversion of phenolic resin waste provides a feasible, low-cost, and sustainable strategy for the efficient removal of cationic dyes from wastewater.
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Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2016
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IF 0.963
Nanan Liao,Zhisen Liu,Wenjing Zhang,Shougui Gong,Daming Ren,Linjiao Ke,Kai Lin,Hao Yang,Fuan He,Hongliu Jiang
In this work, a novel Fe3O4/graphene oxide (GO) hybrid was prepared and its removal ability of cationic methylene blue dye from water was investigated. To improve the dispersability of Fe3O4/GO hybrid in water, GO was first modified by polyethylene glycol (PEG) via a click approach before deposition of Fe3O4 nanoparticles onto its surface. The successful modification of GO surface and the deposition of Fe3O4 nanoparticles were confirmed by transmission electron microscopy directly. The saturation magnetization of the resultant Fe3O4/GO hybrid is 7.8 eum/g. The adsorption capacities of Fe3O4/GO hybrid for methylene blue at 35 and 60°C were as high as 96.05 and 120.05 mg/g, respectively. Moreover, the Langmuir, Freundlich, and Temkin models are used to investigate the isothermal adsorption behavior of Fe3O4/GO hybrid.
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Journal of Saudi Chemical Society
·
2020
·Vol. 24
·期 8
·642-649
·
IF 3.517
Lei Wu,Xiangtai Zhang,Jordan Anthony Thorpe,Lin Li,Yang Si
Relatively cheap or at no cost, easily available, renewable agricultural waste has been given a new purpose. Using coconut shells as the raw material, and being obtained from agricultural, industry by-products, or even waste materials were used as carbon resource. Acid etching coconut shells carbon (AC) rendered micro/nanoscale hierarchical structures and made the surface available for further modification. Then, the surface of acidified coconut shell carbon was engineered via mussel inspired chemistry. The polydopamine functionalized AC composites (AC-PDA) were applied for efficient removal of methylene blue (MB) dye. Further, the surface morphology, and chemical structure were evaluated by means of scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR). Through the combination of acid etching and mussel inspired chemistry, organic functional groups can be successfully introduced onto the surface of the coconut shells carbon. The improvement of adsorption capacity of AC-PDA compared with AC is probably due to the increased number of active binding sites resulting from surface modification and formation of new functional groups.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
·
纳米技术
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NANO
·
2013
·
IF 1.167
SHIYONG BAO,HAN ZHU,PAN WANG,MEILING ZOU,MINGLIANG DU,MING ZHANG
A facile and green route was introduced to synthesize Pt nanoparticles (PtNPs) immobilized on Cu 2 O octahedrons to form Cu 2 O – Pt hierarchical heterostructure. Transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were employed to study their morphology, chemical and crystallographic properties of the Cu 2 O – Pt hierarchical heterostructure. These novel Cu 2 O – Pt hierarchical heterostructures show fascinating degradations of methylene blue (MB), due to the suppressed electron/hole recombination phenomena and the efficient ability to capture the light.
研究领域:
材料科学
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纳米技术
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环境化学
·
光催化
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 7.7
Hongliang Chen,Nana Lu,Qian Long,Mengbi Yang,Dandan Luo,Zhipeng Wang
A porous composite catalyst, designated as 0.1Co/RM@G, is successfully fabricated with red mud (RM). This catalyst, incorporating CoFe 2 O 4 , Fe 3 O 4 and Na 4 CoO 3 as active species, is employed to activate peroxymonosulfate (PMS) for the methylene blue (MB) degradation in aqueous solutions. The results demonstrate that under optimal conditions: 1 g/L of 0.1Co/RM@G and 10 mM PMS, the removal efficiency of MB (initial concentration: 100 mg/L) achieves up to 99.7 % within 15 min. Radical scavenging experiments combined with electron paramagnetic resonance (EPR) analyses confirm that singlet oxygen ( 1 O 2 ) is the primary reactive oxygen species (ROS) responsible for the MB degradation. A plausible mechanism for PMS activation by 0.1Co/RM@G is proposed, where the synergistic effect between Co 3+ /Co 2+ and Fe 3+ /Fe 2+ redox cycles plays a crucial role in sustaining the high catalytic performance. Furthermore, recycling experiments reveal that the catalyst retains over a 71.3% MB removal efficiency after four cycles, highlighting its strong reusability. Density functional theory (DFT) calculations suggest that the N sites (30, 21) and C sites (13, 6, 15, 11, 2, 4) on the MB molecule are particularly susceptible to attack by 1 O 2 during the oxidation process. The potential pathways for the MB degradation are proposed through intermediates analysis using LC-MS technology. Thanks to its robust catalytic efficiency and excellent recyclability, the 0.1Co/RM@G composite shows a great potential for practical applications in the treatment of MB wastewater.
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CARBOHYDRATE POLYMERS
·
2026
·
IF 13.2
Hongxing Shi,Qian Zhao,Mingjie Han,Yin Li,Limin Wang,Jiying Men
Dye-contaminated wastewater from the textile and dyeing industries poses severe environmental and health risks due to the persistence and toxicity of synthetic dyes. To address this issue, sodium alginate (SA)-based composite gel microspheres were fabricated via ionic crosslinking with calcium chloride followed by acid exchange to enhance structural stability and adsorption performance. Two types of functionalized adsorbents were synthesized and optimized: SA modified, and with stearyltrimethylammonium chloride (SA/S-H) and SA co -functionalized with poly(sodium 4-styrenesulfonate) (SA/S/PS-H). Comprehensive characterization using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) confirmed the successful preparation and compositional uniformity of the adsorbents. Adsorption kinetics for methylene blue (MB) followed the pseudo-second-order model, reaching equilibrium within 6 h， while isotherm data fitted the Dubinin-Radushkevich (D-R) model. Notably, the incorporation of PSSS significantly enhanced the adsorption capacity; at 45 °C, SA/S/PS-H achieved a remarkable maximum adsorption capacity of 900.91 mg/g, compared to 612.61 mg/g for SA/S-H. The dominant adsorption mechanisms were identified as electrostatic attraction, micropore filling and hydrogen bonding. Furthermore, the microspheres showed excellent reusability despite the interference of co-existing cations. This study presents a simple and scalable approach for constructing high-performance bio-based adsorbents with significant potential for sustainable and practical treatment of dye-laden wastewater.
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ACS Omega
·
2026
·
IF 5.2
Yangyang Zhao,Yu Chang,Rui Li,Tingting Zhang,Chang Xu,Peiyao Sun,Li Liang,Ying Li
To develop efficient and reusable adsorbents for cationic dye removal from dyeing wastewater, this study aimed to develop a novel composite hydrogel adsorbent and systematically investigate its adsorption performance, optimal preparation conditions, and multimechanistic adsorption behavior for methylene blue (MB). We developed BCSA, a composite hydrogel composed of biochar, cellulose, and sodium alginate, as an efficient adsorbent for MB removal. The adsorption performance and underlying mechanism of MB adsorption onto BCSA were systematically explored via batch adsorption experiments, kinetic/isotherm/thermodynamic model fitting, multiple characterization techniques (SEM, BET, FTIR, XPS), and interference/reusability assays. The cellulose content was found to exert a significant influence on the adsorption performance. The optimal adsorption properties were achieved when the mass ratio of biochar to sodium alginate to cellulose was fixed at 2:2:0–2 (based on 2 g: 2 g: 0–2 g of the three components) in 100 mL of deionized water. BCSA exhibited a high adsorption capacity (∼360 mg/g at 298.15 K and pH 11) and maintained an excellent performance over a broad pH range (4–11). Kinetic investigations demonstrated that the adsorption process conformed to the PFO model, and the equilibrium data were most appropriately characterized by the Temkin isotherm. Thermodynamic analysis confirmed the spontaneous and exothermic nature of the adsorption. Increased ionic strength (NaCl, Na2SO4) and the presence of a competing dye (RhB) reduced MB uptake, yet BCSA retained significant capacity under competitive conditions. Notably, BCSA exhibited outstanding reusability, retaining more than 85% of its original adsorption capacity following four consecutive adsorption–desorption cycles. Characterization and mechanistic studies indicated that MB removal involved multiple synergistic mechanisms including pore filling, electrostatic interactions, cation exchange, hydrogen bonding, and π–π interactions. These results highlighted BCSA as a highly efficient, cost-effective, and reusable adsorbent, exhibiting considerable potential for MB elimination in aqueous environments and providing a feasible and novel material design strategy for the development of high-performance composite hydrogel adsorbents for industrial cationic dye wastewater treatment.
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PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2026
·
IF 1.3
Xin Tian,Kehan He,Wen-shi Jiang,Jun-jie Zhang,Cheng Wang,Yanhua Zhang,Yuan-hui Li,Yu-han Wang
A Fe-Mo/graphene oxide (GO) nanomaterial prepared by a simple reduction method was investigated in this study. This material demonstrated the ability to rapidly adsorb methylene blue (MB) from wastewater at different concentrations within 5 min, with a maximum adsorption capacity of 162 mg/g at 25 °C. Furthermore, as the temperature rises, the adsorption capacity of the Fe-Mo/GO material decreases slightly. The results of thermogravimetric analysis (TGA) also indicate that this material has good thermal stability at low temperatures. The detailed analysis using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) revealed that the well-dispersed molybdenum in the Fe-Mo/GO nanomaterial is essential for the adsorption of methylene blue (MB). The adsorption behavior and equilibrium adsorption isotherm of Fe-Mo/GO nanomaterials align with the pseudo-second-order kinetic model and the Langmuir model, respectively. Compared with the single-functional Fe/GO material, this bimetallic composite not only addresses GO recovery issues but also improves the low adsorption rate typical of single-iron materials.
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Sustainability
·
2025
·Vol. 17
·期 21
·9886
·
IF 3.3
Chuqiao Sha,Fangkui Cheng,Shen Luo,Chao Zhou,Hong Zhang
CoFe2O4loaded onto red brick powder (CoFe2O4@RBP) was synthesized via coprecipitation followed by post-calcination and employed as a heterogeneous catalyst to activate peroxymonosulfate (PMS) for the degradation of methylene blue (MB), thereby valorizing red brick demolition waste within a circular economy pathway and aligning the study with sustainability-oriented resource recovery. The effects of pH, PMS concentration, catalyst dosage, and coexisting substances on MB removal were systematically investigated. Complete MB removal was achieved within 30 min, and the apparent rate constant for the CoFe2O4@RBP/PMS system was 0.22 min−1—slightly lower than that of CoFe2O4/PMS—while Co leaching was markedly reduced. The process performed well across a broad pH range (3.0–9.0). EPR and radical-quenching experiments indicate that SO4•−and HO• play a minor role, whereas the Co(II)–PMS complex is primarily responsible for MB degradation; accordingly, common coexisting species (SO42−, Cl−, NO3−, humic acid) exert negligible effects. The catalyst also maintained strong durability across numerous repetitions. These results highlight a cost-efficient route to PMS activation by coupling CoFe2O4with construction waste-derived supports.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Ting Zhang,Lu Zhang,Jiaojiao Qiao,Qingsong Li,Ding Wei,Jianpeng Zhang,Yi Wang
Attapulgite-waste newspaper cellulose aerogel (ATP-WNCA) was fabricated. • ATP-WNCA got 99.9% adsorption removal ratio of MB. • ATP-WNCA got an MB adsorption capacity of 59.61 mg/g (6.5 times that of pure WNCA). • Due to its unique 3D porous structure, ATP-WNCA has multiple adsorption mechanisms. In this study, waste newspaper cellulose (WNC) was extracted from waste newspapers and compounded with natural attapulgite (ATP) to develop a novel three-dimensional porous composite material attapulgite-waste newspaper cellulose aerogel (ATP-WNCA). Cellulose was obtained from waste newspapers through an acid-base combined treatment, and ATP-WNCA was successfully prepared using a sol-gel method with a freeze-drying process. The prepared aerogel material was characterized by XRD, FT-IR, and XPS techniques, and the results indicated that in ATP-WNCA, the rod like fiber of attapulgite is used as the skeleton, and cross-linked with cellulose to form aerogel. Its thermal stability was significantly enhanced, and its specific surface area was dramatically increased from 9.56 m²/g of WNC to 127.91 m²/g of ATP-WNCA. The adsorption performance experiments of ATP-WNCA for methylene blue (MB) demonstrated that under the optimal conditions of adsorbent dosage of 900 mg/L, temperature of 30°C, and pH of 11, ATP-WNCA got 99.9% adsorption removal ratio of MB, with an adsorption capacity of 59.61 mg/g (6.5 times that of pure WNCA). According to the experimental and adsorption isotherm fitting and kinetic fitting results, the adsorption mechanism mainly includes electrostatic adsorption, ion exchange, pore filling, hydrogen bonding, and surface complexation. Different from prior waste cellulose adsorbents suffering from low surface area, poor thermal resistance, this work innovatively employs natural ATP as a reinforcing skeleton to overcome the inherent limitations of pure waste newspaper cellulose aerogels; the ATP-WNCA exhibits competitive MB capture performance against some reported composite adsorbents and establishes a facile, cost-effective and sustainable strategy for converting waste paper into high-efficiency organic dye remediation materials, substantially advancing the development of biomass-clay composite adsorbents for practical wastewater treatment. Download: Download high-res image (366KB) Download: Download full-size image
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 16
·48048-48061
·
IF 5.8
Xu Hao,Ou Yangyuan,Hu Xinjiang,Chen Daihui,Li Xingong,Tang Chunfang,Zheng Xia
Hydrothermal carbonation carbon (HTCC) is a promising semiconductor material for the photocatalytic degradation of pollutants. However, the poor charge transfer capability of HTCC and the unclear mechanism of photocatalysis limit its practical application. In this study, a novel Z-type heterojunction photocatalyst of silver carbonate (Ag 2 CO 3 ) and HTCC (Ag 2 CO 3 /HTCC) was developed for the degradation of methylene blue (MB) and tetracycline (TC) from wastewater using a hydrothermal- coprecipitation method. Compared to Ag 2 CO 3 and HTCC, 40% Ag 2 CO 3 /HTCC had excellent photocatalytic activity and stability. The free radical scavenger experiments showed that •O 2 − and h + were the main substances for the degradation of MB and TC. The intermediates formed during the photodegradation were identified by HPLC–MS, and a possible mechanism and pathway for the degradation of MB and TC by Ag 2 CO 3 /HTCC was proposed. This study provides a new idea for the synthesis of Z-type HTCC heterojunction with a high-photocatalytic efficiency and its photocatalytic mechanism.
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BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Renlu Liu,Jialiang Zhang,Haiyun Fu,Li Yin,Yongsheng Song,Genhe He
Efficient removal of organic dye pollution from contaminated water is a concern in the absorbent applications. In this study, a green biogenic calcium carbonate (BCC) absorbent was fabricated using Bacillus licheniformis for the removal of methylene blue (MB) from water. This was found to have superior adsorption capacity compared with abiotic calcium carbonate (ACC) and operate within a broad pH range from 3 to 9. MB adsorption on BCC was physical and exothermic. The hydrophobic features, rough nanoporous microstructure, and organic–inorganic mesoporous structure of the BCC may all be responsible for its favorable adsorption mass transfer. The adsorption energy of BCC had a more negative value than that of ACC, indicating a stronger MB interaction with BCC with a lower energy barrier. Hydrogen bonding and electrostatic attraction were involved in the adsorption process. Overall, the findings established a theoretical foundation for the application of BCC in remediation of MB-contaminated water.
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