MOLECULES
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2022
·Vol. 27
·期 23
·8238
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IF 4.927
Majed A. Bajaber,Muhammad Naveed Anjum,Muhammad Ibrahim,Tahir Farooq,Mirza Nadeem Ahmad,Zain ul Abideen
The emerging concepts of sustainable textiles and controlled production strategy demands ideally zero emissions of contaminants into the aquatic environment. However, the currently in-practiced conventional processes in textiles dispose of a number of contaminants especially super toxic synthetic dyes as effluents. In recent years, nanomaterials have become attractive choice for eco-friendly removal of organic dyestuff. Accordingly, this article reports synthesis and characterization of biocomposite wherein copolymer of polyaniline (PANI) and Polypyrrole (PPY) was grafted onto hydroxyethyl cellulose (HEC). Further, adsorption properties of as-prepared composite were evaluated using textile dyes Rhodamine B (RhB) and methyl Orange (MO)- as model adsorbate. The characterization of novel biocomposite (HEC/PANI-PPy) was carried out using Fourier Transform Infrared (FT-IR), Brunauer-Emmett-Teller analyzer (BET), Scanning Electron Microscope (SEM), and powder X-ray diffraction (XRD). The operational parameters such as dye initial concentration, adsorbent amount, pH and contact time were also studied to evaluate the efficiency level of the prepared biocomposite. Interestingly, the composite-mediated adsorption of RhB and MO followed pseudo-second order and the Langmuir isotherm. It is found that the adsorption capacity HEC/PANI-PPy is 30.06 and 29.3 for RhB and MO respectively. Thus, HEC/PANI-PPy is an inexpensive and highly efficient adsorbent that could be employed for could be employed for the separation and removal of toxic organic dyes from polluted textile effluents.Keywords:biocomposite;adsorption;dyes removal;pollution
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Ting Su,Hongxia Shang,Xinru Su,Zhixian Sun,Yuehan Li,Linwen Li,Zhen Zhang,Renyong Geng,Shuisheng Chen
In this investigation, a hydrogel adsorbent featuring remarkable efficiency in dye adsorption was successfully synthesized by the integration of natural polysaccharide (pullulan) and nanoparticles (ZIF-8@PDA). The prepared natural polysaccharide nanocomposite hydrogels not only exhibit superior mechanical strength and biocompatibility, but also demonstrate adeptness in the removal of dye pollutants. The dye removal capacities were 615.4 mg/g for malachite green (MG) and 525.8 mg/g for Congo red (CR), respectively. Notably, the adsorption process exhibits minimal susceptibility to variations in water quality and the presence of co-existing ions. The pH-responsive surface charge conversion capability of the adsorbent renders it recyclable, maintaining a dye adsorption performance exceeding 88 % even after 5 cycles of repeated usage. Overall, these environmentally friendly natural polysaccharide nanocomposite hydrogels hold potential for addressing complex wastewater treatment challenges and long-term use.
研究领域:
材料科学
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环境科学
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生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Yunwu Yu,Yan Wu,Chunyang Xie,Xiaowei Sun,Yongbin Wang,Peng Liu,Yan Wang,Changwei Liu,Ye Wan,Wenhao Pan,Tianwei Li
For the removal of textile dyes, an effective alternative to fabricate tight ultrafiltration membrane was adopted. A series of tight ultrafiltration membranes based on PEEKWC/PEI covalent crosslinking structure were prepared by phase inversion method and showed high-flux and good antifouling performance attributed to the enhancement of hydrophilicity by PEI. The top-surface of the UF membranes was with a water contact angle in range of 24.33° and 40.10° indicating the excellent hydrophilicity. These membranes containing PEI-based positively charged water channel showed high permeability for pure water and salt solutions. As the content of PEI in membrane reaching 20 wt%, the pure water permeability and pure water flux at 3 bar could reach 308 L·m −2 ·h −1 ·bar −1 and 925 L·m −2 ·h −1 , respectively. The pure water flux could even reach 1526 L·m −2 ·h −1 at 5 bar. At the operation pressure of 3 bar, all the UF membranes showed good single-component BBR rejection between 94.87 % and 97.73 %. The rejection of membranes for BBR in dye/salt mixtures was substantially higher than 94.0 % even at a high salt concentration of 60 g/L. The UF membranes with high-flux of pure water and dye solution were discussed, which could be a promising alternative for sustainable textile wastewater treatment and natural water recovery.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Xiaofang Feng,Zongxue Yu,Runxuan Long,Yuxi Sun,Ming Wang,Xiuhui Li,Guangyong Zeng
Titanium carbide (MXene) sheet membranes have become attractive candidates in terms of solvent nanofiltration performance. Whereas, the low contaminant removal ability limited the practical application of MXene membranes in efficient separation. Here, the reduced graphene oxide (RGO)/polydopamine (PDA)/titanium carbide (MXene) composites were prepared by dopamine modification method. Then, the RGO/PDA/MXene composites were suction filtrated on a nylon membrane to construct the two-dimensional-two-dimensional (2D-2D) laminated composite membrane. The effects of MXene content on the surface hydrophilicity, dye retention and oil-water separation properties of the modified membrane were systematically studied. Among them, the RPM-8 membrane exhibited ultra-high separation effect (>96%) and excellent throughput (>200 L/m 2 ·h) for Methylene Blue (MB), Methyl Orange (MO), Methyl Red (MR), Congo Red (CO) and Evans Blue (EB). At the same time, the modified membrane shows very high oil-water separation effect on the emulsion (>97%). In addition, long-term cycle experiments have also revealed the stability of RGO/PDA/MXene composite membranes. The above results further illustrated the importance of the regular straight rigid channels of the composite membrane in separation performance. Therefore, RGO/PDA/MXene composite membrane has tremendous potential in practical applications.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2019
·
IF 6.044
Xiaoliang Qi,Zhipeng Li,Liangliang Shen,Tao Qin,Yuna Qian,Shengzhe Zhao,Minchao Liu,Qiankun Zeng,Jianliang Shen
Wastewater treatment materials that combine high decontamination performance, ease of use and economic production are highly desirable for practical applications. Herein, we fabricated a low-cost and recyclable bio-adsorbent based on a microbial polysaccharide (salecan) for efficient removal of methyl violet (MV) from wastewater. The success fabrication and the properties (such as thermal stability, microarchitecture, mechanical strength and water uptake) of the adsorbent had been investigated, and the hydrogels were found to have tunable properties by simple adjusting the salecan dose in hydrogel composition. Adsorption data displayed that the adsorption of MV followed the pseudo second-order kinetic model (R 2 = 0.99015) and Freundlich isotherm model (R 2 = 0.99221) with a maximum adsorption capacity of 178.9 mg/g. Moreover, salecan-based hydrogels showed a good reversibility in adsorption–desorption cycles. These features indicate that salecan-based bio-adsorbent may be a promising device for dye removal from dyeing waste water.
研究领域:
环境科学
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生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2020
·
IF 3.35
Zexian Zhu,Dongqing Liu,Sizhou Cai,Yankun Tan,Jing Liao,Yuanjian Fang
Two multi-amine, metformin (MTM) and polyethyleneimine (PEI), were used to prepare separative layer of composite membrane through chemical deposition with tea polyphenols (Tph), an inexpensive mixture of nature polyphenols, on a hybrid polysulfone (Psf) membrane. The supporting layer was a blend membrane of Psf, coupling agent treated sepiolite and cetyltrimethylammonium bromide (CTAB). Sepiolite and the surfactant improved surface hydrophilicity of membrane. Pure water flux (PWF) of membranes was increased from 33.97 to 611.46 L m −2 h −1 bar −1 . The optimum mass ratio for MTM to Tph and PEI to Tph were 9.4:1 and 2.4:1 in chemical deposition reaction, respectively. MTM-Tph (MT) surface was negative charged while PEI-Tph (PT) was positive charged. Monomer reactivity determined the thickness of functional layer. Both composite membranes showed dyes rejection capacity at 1 bar. PT layer was thicker than MT, so did its rejection for dyes. The rejection of PT for 5 dyes were all higher than 98% and remained at 99.3% and 98.6% in 200 h for Congo red (CR) and neutral red (NR). PT membrane displayed the potential in textile waste water treatment.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
·
IF 5.3
Longfei Xu,Ziyi Wang,Kun Du,Zhao Zhao,Jun Tang,Shuaijie Zhang,Zhichao Lu,Yongfeng Luo,Yuanjuan Bai,Jinkang Dou
In this work, a cost-effective and eco-friendly coordination polymer (Zr-CP) was synthesized through the combination of natural amino acids as ligands with Zr 4+ metal cation under aqueous conditions at room temperature and used for the treatment of dyeing wastewater. The results showed that Zr-CP exhibited a high adsorption potential for Congo red (CR) in various simulated dyeing effluents. It possesses a theoretical adsorption capacity for CR up to 381.68 mg/g at room temperature 25 ℃ in pH 7, probably due to the abundance of primary amino functional groups in its chemical structure. The thermodynamic analysis indicates that the use of Zr-CP as an adsorbent in the wastewater purification process endothermic and spontaneous in nature. Among the tested isotherms, the Langmuir model was found to best fit the equilibrium data, with a coefficient R 2 value of 0.98. Besides, the adsorption behavior of this bio-based coordination polymer for Congo red was found to adhere to the pseudo-first-order kinetic equation with higher correlation coefficient R 2 of 0.98. Moreover, Zr-CP showed outstanding cycle performance and sustained a high dye removal efficiency even after five reuses. These results indicate that Zr-CP, a biologically derived coordination polymer, offers the advantages of affordability and efficiency, making it a promising adsorbent for the removal of organic pollutants from printing and dyeing effluents.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dong Wu,Hao li,Guangxing Pan,Mi Wang,Wen Yu,Gui-Gen Wang,Jiaheng Zhang
Water pollution from organic oily solvents and dyes is a major global problem. While some wettable materials exist for oily pollutants, few can effectively separate different oil–water emulsions and dyes. To address this problem, we developed a smart citric acid-crosslinked bamboo powder-coated membrane (CBM) with approprite surface roughness and switchable wettability. The CBM membrane is superhydrophobic in oil and superoleophobic in water, making it highly effective in separating oil–water emulsions and dyes. The membrane can efficiently separate various oil–water emulsions, including crude oil-in-water emulsions, with a separation efficiency of 99.76 % and a high flux of 1756 L/m 2 /h. It also adsorbs anionic (e.g. Congo red) and cationic (e.g. methylene blue) dyes in wastewater, with an adsorption rate of 99.45 % after multiple cycles. The membrane can simultaneously separate oil-in-water emulsions and remove dyes from water, facilitating high-value utilization of biomass waste and offering great promise for addressing global water pollution from oily organic solvents and dyes.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2020
·
IF 4.706
Yaru Shang,Xiaohu Cheng,Ruixia Shi,Qian Ma,Yingzi Wang,Ping Yang
The adsorption experimental results show that W 18 O 49 with oxygen vacancies not only has faster adsorption rates for MB but also has larger adsorption capacities than WO 3 . Besides, the maximum adsorption capacity of urchin-like W 18 O 49 (375.94 mg/g) is about 2.76 times of WO 3 (136.25 mg/g). However, photocatalytic results revealed that WO 3 has better photocatalytic degradation ability than W 18 O 49 . Generally, the adsorption efficiency of urchin-like W 18 O 49 (70.01%) is about 3.94 times of WO 3 (17.78%), while the photodegradation efficiency of WO 3 (62.45%) is 2.38 times of urchin-like W 18 O 49 (26.20%). Therefore, urchin-like W 18 O 49 has the best total removal efficiency, which can remove 96.21% of MB (50 ml, 90 mg/L) within 120 min. These studies emphasize the comprehensive effects of WO 3 and W 18 O 49 on dye removal from two aspects of adsorption and photocatalysis and provide strategies for the preparation of efficient dye removal materials.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Hongyu Liu,Xin Wen,Jun Zhang,Huan Zhang,Junfu Wei
Catalytic oxidation of contaminants by peroxomonosulfate (PMS) was coupled with membrane filtration to realize high-performance removal of dyes. CoFe 2 O 4 (CFO) was enwrapped and cross linked in calcium alginate (CaAlg) to form CFO−CaAlg composite membrane. The introduction of CFO could not only activate PMS, but also enhanced the stability, hydrophilic property and crosslinking degree of the composite membrane. The final removal rate was enhanced greatly benefiting from the synergistic effect of filtration and catalytic degradation. The removal rate increased from 75% (filtration) to 98% by coupling with catalytic degradation. More importantly, purified water could be obtained immediately instead of waiting for purifying the whole feed solution due to the superiority of cross flow filtration . Radicals quenching and electron spin resonance (ESR) analysis experiment confirm that SO 4 · − contributed 25% and 1 O 2 contributed 75% in catalytic degradation. The composite membrane was effective for different type of dyes and could be reused only being backwashed by purified water because the catalyst CoFe 2 O 4 could recover from Co 3+ to Co 2+ by itself during the process. This study opens a new path of rapid water purification and immediate drinking water supply.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Luyao Shen,Faqiang Guo,Yundong Hang,Jingming Yang,Zhifen Guo,Wenhui Liang,Pan Du,Wenmei Jiao
Water resources contaminated by industrial dyes can pose a significant threat to the environment and human health. Herein, we conducted a study on the removal of cationic and anionic dyes, such as methylene blue (MB) and methyl orange (MO), using MIL-140A, a zirconium-based metal-organic framework. MIL-140A is synthesized in a Schlenk flask at 120 °C, whereas its conventional synthesis route involves a teflon-sealed autoclave at 220 °C, highlighting the cost reduction and lower equipment requirements of the low-temperature synthesis. The structure of MIL-140A is characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and nitrogen adsorption techniques. The optimal pH for the adsorption of two dyes by MIL-140A is pH 5–8 for MB and pH 3 for MO. The adsorption equilibrium can be reached within 60 min at room temperature, and the adsorption of both dyes on MIL-140A follows pseudo-second-order kinetics and Langmuir isotherm, and the maximum adsorption capacity of MO and MB by MIL-140A were 163.6 and 89.2 mg/g, respectively. Thermodynamic studies indicate an entropy-driven spontaneous process. The adsorption mechanism of MO and MB on MIL-140A is investigated using FT-IR and X-ray photoelectron spectroscopy. The adsorption of MO involves coordination between Zr and sulfonate, while MB adsorption occurs via π-π interactions. Additionally, MIL-140A exhibits better removal efficiency for MO from lithium battery wastewater compared to MB, primarily due to stronger coordination interactions than π-π interactions. These findings demonstrate that MIL-140A is a promising adsorbent for effectively removing both anionic and cationic dyes from water resources.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shaoan Cheng,Yangxi Li,Zhen Yu,Yuqing Su
Adsorption can be used as a pollutant removal method to solve the increasingly serious problem of synthetic dye pollution and metal organic framework (MOF) is considered as a novel adsorbent for its unique structure. However, the high cost and high toxicity during the synthesis procedure of MOFs like MIL-101(Cr) limited their potential on the large-scale production and application. In this paper, waste PET plastic was depolymerized to prepare terephthalic acid (TPA) as an organic linker to synthesize MIL-101(Cr). Besides, Hydrofluoric acid (HF) was not added during the synthesis to avoid poisonous pollution. MIL-101(Cr) was applied to the adsorption of anionic dyes reactive red 2 (RR2) and reactive blue 19 (RB19). The batch experiments exhibited kinetic data best fitted the pseudo-first-order model (PFO) with the adsorption capacity of 662.87 (RR2) and 863.67 mg g -1 (RB19). The isotherm adsorption data fitted well with the Freundlich isotherm, indicating formation of multilayer coverage over the surface of MIL-101(Cr). The highest regeneration rate of MIL-101(Cr) at the fourth cycle was 91.18 and 91.44 % after RR2 and RB19 adsorption. X-ray photoelectron spectroscopy (XPS) technique and Fourier Transform Infrared (FTIR) spectroscopy both indicated the possible adsorption mechanism of MIL-101(Cr) toward RR2 and RB19 could be attributed to electrostatic interactions, hydrogen bonding, and the π-π stacking. This work proposed a novel method using waste plastics as raw materials to synthesize eco-friendly pollutant adsorbent, which had an enlightening effect on pollutant treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）