Excellent Adsorption Performance Research Articles

Superhydrophobic Ti3C2Tx‐decorated bio‐based flexible polyurethane foam for adsorption of crude oil and effective EMI shielding

AbstractFrequent oil spills and increasingly electromagnetic pollution pose a serious threat to human health and ecosystem balance. Due to the high viscosity and poor fluidity of crude oil, traditional absorption materials often have limitations in processing crude oil, such as slow processing speed and inefficiency. A multifunction flexible polyurethane (MPPU) foam was fabricated by foaming from the soybean oil polyol with the modification of Ti3C2Tx nanosheets and polydimethylsiloxane (PDMS). The prepared MPPU foam was superhydrophobic with a water contact angle (WCA) of 160° and showed excellent mechanical stability by remaining in its initial shape after 1000 cycles. Furthermore, the MPPU foam had efficient photothermal conversion capability (up to 165°C within 100 s under one simulated sunlight) and excellent crude oil adsorption performance. A pump‐assisted continuous oil suction device had been successfully designed for quickly absorbing and recovering crude oil from the water. In addition, the foam revealed great electromagnetic interference (EMI) shielding performance (33.6 dB) because of the outstanding conductivity and unique layered structure of Ti3C2Tx. The fabrication of the multifunction foam with remarkable photothermal performance, oil–water separation ability, and EMI shielding performance provides a promising strategy for realizing the high‐value applications of vegetable oil‐based flexible foams.Highlights The foam is fabricated by using environmentallyfriendly soybean oil polyol. The foam has excellent photothermal conversion and crude oil adsorption performance. The foam has great electromagnetic interference shielding performance.

Effective removal of Congo red and hexavalent chromium from aqueous solutions by guar gum/sodium alginate/Mg/Al-layered double hydroxide composite microspheres.

Effective removal of Congo red and hexavalent chromium from aqueous solutions by guar gum/sodium alginate/Mg/Al-layered double hydroxide composite microspheres.

Effect of Cu MOF based functional catalysts on cracking and adsorption of bio-oil compounds via thermo-catalytic pyrolysis: A net zero emission scenario

Effect of Cu MOF based functional catalysts on cracking and adsorption of bio-oil compounds via thermo-catalytic pyrolysis: A net zero emission scenario

A "cyclodextrin-salicylic acid-chitosan" bifunctional monomer magnetic hydrophilic imprinted sandwich gel for targeted adsorption and slow release of ginkgolic acid.

A "cyclodextrin-salicylic acid-chitosan" bifunctional monomer magnetic hydrophilic imprinted sandwich gel for targeted adsorption and slow release of ginkgolic acid.

Fabrication of electrolytic manganese residue/granulated blast furnace slag-based geopolymer microspheres (EMR/GBFS@GMs) and enhanced synergic adsorption of Cr(III)-containing wastewater

Fabrication of electrolytic manganese residue/granulated blast furnace slag-based geopolymer microspheres (EMR/GBFS@GMs) and enhanced synergic adsorption of Cr(III)-containing wastewater

Efficient and stable extraction of nano-sized plastic particles enabled by bio-inspired magnetic "robots" in water.

Efficient and stable extraction of nano-sized plastic particles enabled by bio-inspired magnetic "robots" in water.

Controllable Preparation of Low-Cost Coal Gangue-Based SAPO-5 Molecular Sieve and Its Adsorption Performance for Heavy Metal Ions.

With the advancement of industrial production and urban modernization, pollution from heavy metal ions and the accumulation of solid waste have become critical global environmental challenges. Establishing an effective recycling system for solid waste and removing heavy metals from wastewater is essential. Coal gangue was used in this study as the primary material for the synthesis of a fully coal gangue-based phosphorus-silicon-aluminum (SAPO-5) molecular sieve through a hydrothermal process. The SAPO-5 molecular sieve was characterized through several methods, including X-ray diffraction (XRD), scanning electron microscopy (SEM), BET surface analysis, Fourier-transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS), to examine its mineral phases, microstructure, pore characteristics, and material structure. Adsorption performance towards wastewater with Cd2+ and Pb2+ ions was investigated. It was found that the adsorption processes of these ions are well described by both the pseudo-second-order model and the Langmuir isotherm. According to the Langmuir model, the coal gangue-based SAPO-5 molecular sieve exhibited maximum adsorption capacities of 93.63 mg·g-1 for Cd2+ and 157.73 mg·g-1 for Pb2+. After five cycles, the SAPO-5 molecular sieve retained strong stability in adsorbing Cd2+ and Pb2+, with residual adsorption capacities of 77.03 mg·g-1 for Cd2+ and 138.21 mg·g-1 for Pb2+. The excellent adsorption performance of the fully solid waste coal gangue-based SAPO-5 molecular sieve is mainly attributed to its mesoporous channel effects, the complexation of -OH functional groups, and electrostatic attraction.

Study on the Treatment of Heavy Metal Ions in COD Detection Waste Liquid by Molecular Sieve

By studying the removal effect of different pore size molecular sieves on heavy metal Ag+ in COD detection waste liquid, molecular sieves with excellent adsorption performance for heavy metal ions were screened. The removal rate of Ag+ can reach over 60%. By studying the structural changes of molecular sieves before and after adsorption and desorption of heavy metal ions, exploring the principles of molecular sieve adsorption and desorption, the method for the recycling and utilization of heavy metal ions and molecular sieves was established.

BiOBr/Coal Gangue-Based SAPO-5 Molecular Sieve Nanocomposite for Enhanced Adsorption and Photocatalytic Degradation of Methylene Blue.

The accumulation of organic pollutants and solid waste is one of the major environmental challenges faced globally. Establishing an efficient recycling system for solid waste and designing cost-effective, high-performance photocatalysts are urgent tasks for the removal of organic pollutants from water. This study utilizes coal gangue as the precursor to synthesize a coal gangue-based phosphorus-silicon-aluminum molecular sieve (SAPO-5) via hydrothermal synthesis. The resulting material was then composited with bismuth oxybromide (BiOBr) to form a novel BiOBr/coal gangue-based SAPO-5 nanocomposite. When the mass ratio of BiOBr to coal gangue-based SAPO-5 molecular sieve is 0.3, the synthesized nanocomposite exhibits excellent adsorption and photocatalytic performance for the removal of methylene blue, achieving a removal rate of 97.8% and the mineralization rate of 57.4% within 30 min. The superior performance can be attributed to the optimal pore size, rapid charge transfer rate, and high photogenerated charge density of the BiOBr/coal gangue-based SAPO-5 nanocomposite. The novel BiOBr/coal gangue-based SAPO-5 molecular sieve nanocomposite catalyst presents a new approach for the harmless treatment of organic dye wastewater and the high-value utilization of coal gangue.

A Novel Mesoporous Aluminum‐Based MOF with Large Pore Volume for High Concentration Benzene Adsorption

AbstractDeveloping large pore volume mesoporous metal‐organic frameworks (MOFs) is a reliable strategy for adsorbing high‐concentration benzene in the event of accidental leakage. Herein, a novel mesoporous Al‐based MOF, named ZJU‐928(Al), is synthesized using biphenyl‐3,4′,5‐tricarboxylic acid ligands and low toxic AlO6 cluster. It has larger pore volume (1.05 cm3 g−1), order hexagonal channel (32.10 Å), and higher specific surface area (2344 m2 g−1). As relative pressure up to 0.10, benzene adsorption of ZJU‐928(Al) rises to 9.99 mmol g−1, exhibiting an excellent saturation benzene adsorption of 11.37 mmol g−1 at 298 K. The isosteric heat of adsorption for benzene on ZJU‐928(Al) is only 24.52 kJ mol−1 at near‐zero loading, lower than that of most reported MOFs, allowing for lower energy consumption during ZJU‐928(Al) regeneration. ZJU‐928(Al) has excellent cyclical benzene adsorption‐desorption performance, and highest benzene diffusivity coefficient (2.65 × 10−5 cm2 s−1). Simulation shows that the excellent saturation benzene adsorption performance of ZJU‐928(Al) can be attributed to the larger pore volume accommodating more benzene molecules. Consequently, this research synthesizes a novel mesoporous Al‐based MOF with excellent saturation benzene adsorption, highlighting the potential of MOFs for high‐concentration toxic gas adsorption.

Adsorption studies of methylene blue using mangosteen shell porous biochar as adsorbent

The biomass of mangosteen shells was utilized as a raw material to prepare activated carbon based on mangosteen shells through a two-step process of mixed alkali carbonization and activation. This study aimed to investigate the efficacy of the activated carbon in removing methylene blue. The optimum preparation conditions for the study are KOH:NaOH:mangosteen shell carbon = 1:1: 1 with a particle size of 80 mesh. The activated carbon exhibits a Brunauer–Emmett–Teller (BET) specific surface area of 1432.699 m2/g and a Langmuir maximum specific surface area of 2066.130 m2/g. It demonstrates excellent adsorption performance for methylene blue, with a maximum adsorption amount of 985.5 mg/g. Characterization of the activated carbon is conducted using various techniques including scanning electron microscope, X-ray diffraction, Raman spectrometry, Fourier infrared spectrometry, X-ray photoelectron spectroscopy, and BET theory. The adsorption results were consistent with the Freundlich model and the pseudo-first-order kinetic model, indicating that the carbon material exhibits multilayer physical adsorption characteristics for methylene blue. The prepared material offers a large specific surface area, good environmental economics, and excellent adsorption performance, making it a promising choice for adsorption material preparation compared with other biomass activated carbons.

Modification of bacterial cellulose by MoBTx MBene and 1,4-dithiothreitol for rapid and efficient adsorption of indomethacin and losartan potassium.

Modification of bacterial cellulose by MoBTx MBene and 1,4-dithiothreitol for rapid and efficient adsorption of indomethacin and losartan potassium.

Plasmonic S-type Bi/TiO2@C Heterojunction Composites for Efficient Visible-Light Photocatalytic Removal of Multi-Antibiotics and Dyes

Plasmonic S-type Bi/TiO2@C Heterojunction Composites for Efficient Visible-Light Photocatalytic Removal of Multi-Antibiotics and Dyes

Self-cleaning micro/nano graded porous groove structure fiber membranes by coaxial spinning for purification of dye wastewater.

Self-cleaning micro/nano graded porous groove structure fiber membranes by coaxial spinning for purification of dye wastewater.

Microenvironment modulation of two-dimensional defective carbon nitride with extended nanoporous furnished oxygen-enriched sites for efficient recovery of rare earth elements.

Microenvironment modulation of two-dimensional defective carbon nitride with extended nanoporous furnished oxygen-enriched sites for efficient recovery of rare earth elements.

Taloring sawdust derived hydrochar via red mud for cadmium removal: Electron transfer insight and recyclability assessment.

Taloring sawdust derived hydrochar via red mud for cadmium removal: Electron transfer insight and recyclability assessment.

Environmentally-friendly rGO/Mn nanocomposites for efficient removal of tetracycline and its degradation pathway.

Environmentally-friendly rGO/Mn nanocomposites for efficient removal of tetracycline and its degradation pathway.

Adsorptive immobilization of cadmium and lead using unmodified and modified biochar: A review of the advances, synthesis, efficiency and mechanisms.

Adsorptive immobilization of cadmium and lead using unmodified and modified biochar: A review of the advances, synthesis, efficiency and mechanisms.

Synthesis of polyvinyl chloride modified magnetic hydrochar for effective removal of Pb(II) and bisphenol A from aqueous phase: performance and mechanism exploration

To effectively remove lead (Pb(II)) and bisphenol A (BPA) from wastewater, polyvinyl chloride modified magnetic hydrochar (PVC-AMHC) was synthesized through co-hydrothermal carbonization of polyvinyl chloride and corn straw, and subsequently activated using NaOH. Characterization demonstrated that both PVC and NaOH activation increased the content of oxygen-containing functional groups, and Fe3O4 was successfully loaded onto the material surface. Furthermore, PVC-AMHC displayed remarkable uptake capacity with the maximum uptake amount of Pb(II) (217.53 mg/g) and BPA (185.53 mg/g) at 130 and 30 min, respectively, under a wide pH range. Additionally, PVC-AMHC possessed high tolerance to different interference cations and maintained excellent adsorption performance during four regeneration cycles. The thermodynamic analysis suggested that the absorption processes of Pb(II) and BPA by PVC-MHC were spontaneous (-ΔG0) with an endothermic characteristic (+ΔH0). Adsorption mechanisms of Pb(II) on PVC-AMHC included complexation, electrostatic attraction, and pore filling, and those of BPA were mainly associated with hydrogen bonding and pore filling. In conclusion, PVC-AMHC was an environmentally friendly adsorbent with effectively simultaneous removal of Pb(II) and BPA from wastewater.Graphical

Adsorption of Cu(II) from aqueous solution by modified magnetic starch st/Fe3O4-g-pAA

The composite particles (St/Fe3O4) were prepared using the co-precipitation method, whereby FeSO4 and FeCl3 were precipitated under alkaline conditions. The particles were composed of a starch matrix and Fe3O4. Subsequently, AA was grafted and cross-linked onto the composite particles (St/Fe3O4) via a one-step traditional free radical polymerization method, resulting in the formation of polymer-modified composite particles (St/Fe3O4-g-pAA). The initiator used in this process was 2,2’-Azobis(2-methylpropionitrile). The structures of St/Fe3O4 and St/Fe3O4-g-pAA were characterized by FTIR, thermogravimetric analysis and hysteresis loop. The impact of varying parameters, including the dosage of the St/Fe3O4 and St/Fe3O4-g-pAA adsorbents, the initial pH value of the Cu(II) solution, the initial Cu(II) concentration, the absorption time, and the temperature, on the adsorption behavior of Cu(II) was investigated. The results demonstrated that St/Fe3O4-g-pAA exhibited excellent adsorption performance for Cu(II), with a unit adsorption capacity of 123.92 mg/g and a maximum removal rate of 85% when the original concentration of the Cu(II) solution was 10. The experiment was conducted with 24 mg/L of Cu(II) at a pH of 7 at room temperature, with a mass of 1.5 mg of St/Fe3O4-g-pAA and an adsorption time of 3 h. The adsorption process followed the Langmuir model and the pseudo-second-order kinetic model, which was dominated by chemical adsorption and belonged to single-layer adsorption. The results of the renewable performance studies demonstrated that following eight cycles of adsorption, 92% of the initial adsorption effect was retained. It can therefore be concluded that the St/Fe3O4-g-pAA adsorbent material prepared in this work is an effective means of improving the adsorption rate of Cu(II).