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SEM images of PBS fibrous membrane at various voltage: a 20 kV, b 25 kV, c 30 kV and d after the modified by rhodanine at 30KV. And c′ and d′ are the diameter distribution of c and d, respectively and the digital photos of PBS fibrous membrane (e), PBS membrane coated rhodanine (f) and PBS/rhodanine membrane after the polymerization process (g)
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In the current work, cost-effective, high efficiency, eco-friendly and biodegradable absorption adsorbents were prepared by loading rhodamine onto the surface of poly (butylene succinate) (PBS) electrostatic spinning film for the water purification. The adsorbability to heavy metal ions (such as: Hg(II) and Ag(I)) and dyes (such as: Congo red(CR),...
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Citations
... Firstly, prepare a 12wt% PBS spinning solution. Add a certain amount of PBS particles to a mixed solution of chloroform and isopropanol (chloroform: isopropanol = 7:3), where chloroform is used as a solvent and isopropanol is used as a stabilizer [41]. To prepare PBS nanofiber membrane, the as-prepared PBS spinning solution was added into the syringe, an anti-adhesion paper was used as the receiving substrate. ...
Air pollution caused by the rapid development of industry has always been a great issue to the environment and human being's health. However, the efficient and persistent filtration to PM0.3 remains a great challenge. Herein, a self-powered filter with micro-nano composite structure composed of polybutanediol succinate (PBS) nanofiber membrane and polyacrylonitrile (PAN) nanofiber/polystyrene (PS) microfiber hybrid mats was prepared by electrospinning. The balance between pressure drop and filtration efficiency was achieved through the combination of PAN and PS. In addition, an arched TENG structure was created using the PAN nanofiber/PS microfiber composite mat and PBS fiber membrane. Driven by respiration, the two fiber membranes with large difference in electronegativity achieved contact friction charging cycles. The open-circuit voltage of the triboelectric nanogenerator (TENG) can reach to about 8 V, and thus the high filtration efficiency for particles was achieved by the electrostatic capturing. After contact charging, the filtration efficiency of the fiber membrane for PM0.3 can reach more than 98% in harsh environments with a PM2.5 mass concentration of 23,000 µg/m3, and the pressure drop is about 50 Pa, which doesn't affect people's normal breathing. Meanwhile, the TENG can realize self-powered supply by continuously contacting and separating the fiber membrane driven by respiration, which can ensure the long-term stability of filtration efficiency. The filter mask can maintain a high filtration efficiency (99.4%) of PM0.3 for 48 consecutive hours in daily environments.
Supplementary information:
The online version contains supplementary material available at 10.1007/s42765-023-00299-z.
... Recycle life as one of the essential assessment criteria of adsorbents, and a high surface-to-volume ratio is an appealing feature of ENMs as adsorbents for metal ions removal [158]. As Haider et al. introduced in their work, neutralized electrospun nanofibers effectively remove metal ions at the mercy of many ionizable and polar groups in the chitosan structure [159]. ...
Recent environmental studies reveal that protecting freshwater resources and preventing contamination of groundwater, surface water, and seawater have become critical issues worldwide. With finite available freshwater resources on our planet, seawater desalination and wastewater treatment are the only practical options to overcome the water shortage crisis. Water reclamation using one-dimensional nanostructured materials, such as electrospun nanofibers, has recently received considerable attention. Electrospun Nanofiber Materials (ENMs) as membranes provide significantly higher flux and energy efficiency than the conventional phase inversion membranes due to their highly porous, interconnected pore structure, low transmembrane pressure requirement, while rejection of contaminants is not compromised, which makes them suitable candidates in a wide range of applications from biomedical devices to water treatment membranes. Numerous investigations have been carried out on the electrospun nanofibers' thermal, electrical, and mechanical properties prepared under various fabrication conditions. In this paper, electrospinning theories, effective synthesis parameters, and different electrospinning devices were reviewed according to the proposed potentials of the ENMs as adsorptive membranes based on past achievements and future challenges in water treatment processes. That is followed by a comprehensive discussion about ENMs' modification methods to fabricate unique ENMs architectures. Taking altogether, outlooks and conclusions are expressed in accordance with recent progress.
... Figure 13a shows the XPS spectra of CDs/PoPD composite before and after the adsorption of Cu 2+ , Pb 2+ and Cd 2+ . The peaks at 284.0 eV, 398.15 eV and 530.36 eV before adsorption were the characteristic peaks of C 1s , N 1s and O 1s , respectively [10,44]. After the adsorption of Cu 2+ , Pb 2+ and Cd 2+ , the characteristic peaks of Cu 2p and Cd 3d at 933.04 eV and 405.10 eV [21,45] could be seen. ...
Because poly(o-phenylene diamine) (PoPD) has more free amino groups and imine groups than other conductive polymers, together with the functional groups on the surface of Carbon dots (CDs), it can provide more adsorption active sites for the adsorption of heavy metal ions, correspondingly. In this study, the novel adsorbent material composed of PoPD and CDs (CDs/PoPD) with high performance were prepared in order to investigate the synergetic effect of CDs in enhancing the adsorption properties of conductive polymer based adsorbent to heavy metal ions in water. The Cu2+ removal ratio of PoPD was 73.63% and that of CDs/PoPD was as high as 88.16%, which were higher than that of other reported conductive polymers. The removal ratios of Pb2+ and Cd2+ with CDs/PoPD were 98.97% and 77.48%, respectively. The maximum adsorption capacities of CDs/PoPD to Cu2+, Pb2+ and Cd2+ were 48.88 mg·g−1, 53.44 mg·g−1 and 36.20 mg·g−1, respectively. Results showed that Cu2+, Pb2+ and Cd2+ complexed with the amine and imine groups on the CDs/PoPD chain, and their adsorption processes could be explained with the quasi-second-order kinetic model and Langmuir adsorption isotherm model. The results of reusability test of adsorption for Cu2+ showed that the regeneration efficiency of CDs/PoPD was 85.95%, which was significantly higher than that of PoPD.
... It was found that the maximum adsorption capacity was 90.9 mg g − 1 , which was quite high and hence provided an alternative for the removal of dyes from wastewater. Fan et al. (2021) used poly (butylene succinate) (PBS) electrostatic spinning film coated with rhodamine to remove heavy metals and dyes from water. The pollutants studied were Hg 2+ , silver, CR, and CV. ...
Endocrine-disrupting chemicals (EDCs) target the endocrine system by interfering with the natural hormones in the body leading to adverse effects on human and animal health. These chemicals have been identified as major polluting agents in wastewater effluents. Pharmaceuticals, personal care products, industrial compounds, pesticides, dyes, and heavy metals are examples of substances that could be considered endocrine active chemicals. In humans, these chemicals could cause obesity, cancer, Alzheimer's disease, autism, reproductive abnormalities, and thyroid problems. While in wildlife, dysfunctional gene expression could lead to the feminization of some aquatic organisms, metabolic diseases, cardiovascular risk, and problems in the reproductive system as well as its levels of hatchability and vitellogenin. EDCs could be effectively removed from wastewater using advanced technologies such as reverse osmosis, membrane treatment, ozonation, advanced oxidation, filtration, and biodegradation. However, adsorption has been proposed as a more promising and sustainable method for water treatment than any other reported technique. Increased attention has been paid to biodegradable polymers and their nano-composites as promising adsorbents for the removal of EDCs from wastewater. These polymers could be either natural, synthetic, or a combination of both. This review presents a summary of the most relevant cases where natural and synthetic biodegradable polymers have been used for the successful removal of EDCs from wastewater. It demonstrates the effectiveness of these polymers as favorable adsorbents for novel wastewater treatment technologies. Hitherto, very limited work has been published on the use of both natural and synthetic biodegradable polymers to remove EDCs from wastewater, as most of the studies focused on the utilization of only one type, either natural or synthetic. Therefore, this review could pave the way for future exploration of biodegradable polymers as promising and sustainable adsorbents for the removal of various types of pollutants from wastewater.
... Various techniques including chemical precipitation [3], ion exchange [4], membrane extraction [5], electrochemical separation [6], and adsorption [7][8][9][10][11][12][13] have been applied for heavy metal scavenging. In particular, adsorption is recognized as one of the most promising techniques due to its high efficiency, design flexibility, operation easiness, and low cost. ...
Heavy metal pollution stems from the modern industry is a severe environmental problem. In this work, a highly efficient adsorbent based on starch-graphene oxide architecture (SGO) was fabricated, characterized and employed to scavenge aqueous Pb(Π). The scavenging performance was evaluated, and the interaction mechanism between SGO and Pb(Π) was elucidated. Results indicate, the starch introduction brought performance enhancement, consequently made SGO outperform both single starch and GO in terms of adsorption efficiency. SGO adsorbs 95.83 % of Pb(Π) in 16 min, with adsorption capacity 383.32 mg•g − 1 , manifesting some advantages over other analogous adsorbents, such as higher capacity and faster kinetics. The chemical interaction between Pb(OH) ⁺ and C = O, C-O related groups in SGO supported the adsorption, which was a spontaneous, exothermic and entropy increasing process. The adsorption was well described by the Freundlich, pseudo-second-order model and Intra-particle diffusion models, both intra-particle diffusion and chemical interaction were the rate controlling steps. Based on its high adsorption efficiency, SGO may have promising application in heavy metal scavenging from water.
Since monomers in backbone of poly(butylene succinate-co-adipate) (PBSA) are not entirely derived from bio-based sources, limiting its application in the face of increasingly stringent environmental policies. In this study, a novel full bio-based biodegradable random copolyester poly(butylene succinate-co-sebacicate-co-salicylicate) was successfully synthesized. Detailed investigations were conducted on the structural, mechanical, and degradation characteristics resulting from the introduction of salicylicate and sebacicate units. Introduction of salicylicate units effectively enhanced the mechanical performance. In comparison to PBSA, the tensile modulus of copolymer increased by 20.2% with 10% salicylic acid. Introduction of sebacicate units significantly altered the crystalline structure of copolymer and promote the degradation efficiency. Considering both mechanical strength and degradation efficiency, the copolyester with 2% salicylic acid and 20% sebacic acid was found to meet practical application requirements. Relative to PBSA, this copolymer demonstrated a 13.7% increase in tensile modulus and a remarkable 143.1% improvement in degradation efficiency. Importantly, this study focused on the effect of the bio-based rigid monomer salicylic acid and the soft monomer sebacic acid on the degradability of biodegradable polymers. The insights gained provide valuable guidance for tailoring the synthesis of degradable plastics to meet diverse degradation cycle requirements.
