Journal of Water Process Engineering
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2023
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IF 7
Zhihui Wang,Peisen Huang,Yanghao Yan,Yu Tao,Wu Lei,Mingzhu Xia,Fengyun Wang
Heavy metals and dyes present in industrial wastewater pose a significant threat to both the ecological environment and human health. In this study, we have developed a multifunctional adsorbent, SEP/PR, which is obtained by modifying sepiolite with polyrhodanine. The purpose of this adsorbent is to effectively remove Pb 2+ ions and Congo red (CR) dye from contaminated water sources. The adsorbents were systematically characterized using SEM, EDS, XRD, BET, FT-IR and XPS. Compared with raw sepiolite, SEP/PR exhibited better adsorption performance due to its abundant adsorption sites. The adsorption of Pb 2+ and CR on SEP/PR can be described by pseudo-second-order and Langmuir models, and the preferential adsorption capacities were still satisfactory even in the presence of interference. The maximum adsorption of Pb 2+ and CR was 423.29 mg/g and 894.76 mg/g, respectively, at 298 K. It is noteworthy that the removal rates of both Pb 2+ and CR were increased in the binary Pb 2+ -CR system. These observed increases can be attributed to the introduction of additional adsorption sites, as well as the electrostatic attractions that occur between the adsorbed Pb 2+ (+) and CR (−) ions. The adsorption mechanism for Pb 2+ primarily involves complexation, while for CR, it involves a combination of electrostatic interactions, hydrogen bonding, and π-π interactions. Finally, SEP/PR has good reusability and practical application capabilities. This study shows that SEP/PR is simple to synthesize and can be used for the synergistic removal of heavy metals and dyes in complex systems.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 24
·13476-13485
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IF 3.049
Fan Zhang,Chuting Yang,Yi Li,Min Chen,Sheng Hu,Haiming Cheng
P,P-bis (2-oxooxazolidin-3-yl)-N-(3-(triethoxysilyl)propyl)phosphinic amide (APTES-BOP)-modified SBA-15 (SBA-15-BOP) was prepared by a post-synthesis grafting method for the removal of anionic azo dyes from aqueous solutions. The properties of the prepared adsorbent were characterized by PXRD, FT-IR, SEM, TEM, nitrogen sorption, and elemental analysis. Adsorption equilibrium and adsorption kinetic studies demonstrated that the experimental data fitted well with the Langmuir isotherm model and pseudo-second-order model. According to Langmuir fitting, SBA-15-BOP showed high adsorption capacity for CR and RR2 dyes, with the maximum adsorption capacities of 518.1 mg g−1 and 253.8 mg g−1, respectively. The thermodynamic study indicated that the adsorption processes of CR and RR2 dyes on SBA-15-BOP were spontaneous and exothermal. The prepared SBA-15-BOP can be a promising adsorbent for the removal of anionic dyes from aqueous solutions.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
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2021
·Vol. 28
·期 3
·1-11
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IF 3.097
Yang Jiafei,Shang Jingqi,Chen Jiewei,Xue Feng,Ke Zunye,Zhang Xiangfen,Ding Enyong
In this study, a simple method was used to synthesize a new type of magnetic composite material BNNS@ Fe 3 O 4 . In the PVP aqueous solution, the h-BN surface was exfoliated by a high-pressure homogenizer to obtain a few layers of BNNS. Then FeCl 3 ·6H 2 O and hydrazine hydrate were added for reduction treatment, and deposited Fe 3 O 4 nanoparticles on the surface of BNNS. PVP can not only stabilize a few layers of BN, but also promote the formation of Fe 3 O 4 . Through SEM, TEM, XRD, XPS and other characterization methods, the composition and surface morphology of the composite material were determined. Furthermore, the adsorption of Congo red by the composite material was explored. The removal rate of Congo Red by composite of BNNS @ Fe 3 O 4 (0.1) was 39% after 12 h reaction at 323 K. But adsorption capacity also increased with time, when the time was extended to 48 h, its maximum removal rate of Congo Red was 83% and the adsorption capacity was 499 mg/g at 313 K. The adsorption kinetics and thermodynamics of the composite material for Congo red at 313 K were studied. The adsorption process was more consistent with the pseudo-second-order kinetic equation. The composite nanoparticles can move directionally under the action of a magnetic field, which also has potential application value in thermal conductivity.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2021
·Vol. 139
·期 18
·52050
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IF 3.125
Dexiang Yan,Fenghua Li,Bin Sun,Yuanbo Wang,Qinze Liu,Tingting Gao,Guowei Zhou
In this work, a new AC@Catechol/PEI adsorbent was prepared via the copolymerization of catechol and polyethyleneimine (PEI) onto pretreated commercial activated carbon (AC). It achieved a high adsorption capacity of 411.52 mg/g for the anionic dye Congo red (CR), which was approximately 7 times that of pretreated AC without modification. In bath adsorption experiment, 1 g of adsorbent was used to treat 4 L of 100 mg/L CR solution, resulting in 98.5% CR removal. In addition, the prepared AC@Catechol/PEI adsorbent exhibited highly efficient CR competitive adsorption against SO 4 2− ions and cationic malachite green dye. The adsorption mechanism was mainly attributed to electrostatic interactions, hydrogen bonding, and π – π stacking. Catecholamine modification greatly improved the adsorption capacity and adsorption selectivity of commercial AC for CR dyes. This low-cost adsorbent may have broad prospects for the removal of anionic dyes in wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
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IF 5.162
Hongling Zhang,Jianzhe Ma,Fengyun Wang,Yuting Chu,Lei Yang,Mingzhu Xia
The carboxymethyl-chitosan-montmorillonite (CMC-MMT) organic-inorganic hybrid material was applied to adsorb Pb(II) and Congo red (CR) anionic dye from aqueous solution. Molecular dynamics(MD) simulation was carried out to reveal the mechanism of CMC hybrid MMT. The results suggested that CMC has been adsorbed on the interlayer space and surface of MMT, hydrogen bonds had been formed between hydroxyl & carboxyl groups of CMC with the surface of MMT, Van der Waals interaction was also existed, while amino groups of CMC hadn't obvious interaction with the surface of MMT. Batch experiments were executed to investigate the adsorption effect of CMC-MMT was compared with Na-MMT and CMC. The results showed that CMC-MMT exhibited the higher adsorption capacity than Na-MMT and CMC, The OH and COOH or NH 2 groups of CMC chains may serve as electrostatic interaction active sites and coordination sites, which improved the adsorption performance of CMC-MMT on Pb(II)，and the insertion of CMC enlarged the inter-layer space of MMT, resulting in more surface active sites in the CMC-MMT hybrid composite, which increased the adsorption of organic pollutant CR. The kinetic and isotherm studies indicated that the pseudo-second-order and the Langmuir model well described the adsorption equilibrium of Pb(II) and CR on CMC-MMT.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
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IF 2.74
Ying Zhang,Lizhen Bai,Wenfeng Zhou,Runhua Lu,Haixiang Gao,Sanbing Zhang
Fe 3 O 4 @nSiO 2 @mSiO 2 was prepared successfully and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), infrared spectrometer (FT-IR), BET surface area measurements and Zeta potential analysis techniques. The contact time, initial concentration of congo red, temperature and pH on adsorption capacity were studied. The adsorbent shows highly efficient adsorption properties, with maximum adsorption capacity of 1428 mg g − 1 for congo red, which is much higher than the other adsorbents (normally below 300 mg g − 1 ). The adsorption kinetics and isotherm of congo red on Fe 3 O 4 @nSiO 2 @mSiO 2 were systematically investigated and found that the adsorption kinetics and isotherm were well fitted by pseudo-second-order kinetic and Langmuir isotherm model.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2022
·
IF 7.129
Yixuan Liang,Hanbing Li,Xiaotong Li,Qiyu Zhang,Jiaying Fei,Sumei Li,Sha Chen
Around 6.6 million tons of spent coffee is produced per year, resulting in resources loss and potential environmental risks. Hence, a green technique is required to reuse the spent coffee grains. In this study, coffee grounds were burnt at 900 °C to generate the biochar (BC) for the synthesis of the porous adsorbent (ZIF-8 @BC) by growing ZIF-8 on the surface of BC. We applied the well-prepared ZIF-8 @BC to remove Congo red (CR) in water. The maximum adsorption capacity of ZIF-8 @BC on Congo red in water was up to 1080.4 mg/g, which was significantly higher than that of many different types of BCs reported in previous studies. The reasons for its highly efficient adsorption of CR probably was attributed to metal ions and coordinatively unsaturated sites in the material. Also, BC enabled the less aggregation of ZIF-8 to provide sufficient specific surface area for CR adsorption. From the analysis of the pseudo-second-order kinetic model and Langmuir model, the adsorption of ZIF-8 @BC on CR was a homogeneously chemical adsorption process regulated by electrostatic interaction, π-π stacking and metal coordination.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2021
·Vol. 28
·期 22
·28732-28749
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IF 4.223
Dovi Evans,Kani Alexander Nti,Aryee Aaron Albert,Jie Ma,Li Jianjun,Li Zhaohui,Qu Lingbo,Han Runping
In this research, the eco-friendly cationic surfactant modified walnut shell (WNS-CTAB) was synthesised to enhance the uptake for bisphenol A (BPA) and Congo red (CR) from aqueous solution. The characterisation of WNS-CTAB was performed using Fourier-transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), etc. to know its physiochemical properties. The adsorption equilibrium results were best described by the Langmuir isotherm model, which confirmed the monolayer adsorption of the pollutant molecules onto the adsorbent’s surface. The maximum monolayer adsorption quantity of WNS-CTAB was established to be 38.5 mg g –1 for BPA and 104.4 mg g –1 for CR at 303 K, respectively. Pseudo-second-order kinetic models described the adsorption kinetics of both BPA and CR. Furthermore, the intra-particle diffusion was applied to analyse the kinetic results and was established that the rate was not solely controlled by diffusion. The mechanisms associated with BPA and CR adsorption onto the WNS-CTAB may include van der Waals interaction, hydrophobic interaction, and electrostatic force. WNS-CTAB demonstrated a good reusability potential with desorption through three successive adsorption-desorption cycles performed in both experiments. Moreover, in the binary system, the adsorption capacity of BPA witnessed a 66% decrease while CR saw marginal reduction of 8.0 %. This suggests that WNS-CTAB had a higher affinity for binding to CR with higher selectivity as compared with BPA. Therefore, WNS-CTAB has exhibited huge potential to serve as a functional material for practical use in the treatment of wastewater. Graphical abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2023
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IF 11.4
Zepeng Liu,Yueyao Hu,Jie Zhang,Ying Guan,Liping Zhang,Ping Ye,Tongtong Zhang,Xingyu Huang,Meng Wang,Hui Gao
Adsorbents with excellent physicochemical properties and green synthetic routes are desired for efficient removal of Congo red (CR) wastewater. Hence, a novel approach was proposed within this work. Biochar NCBC obtained from Medulla Tetrapanacis was synthesized through co-modification with urea/calcium chloride. NCBC exhibited an enormous surface area (750.09 m 2 /g) and a micro-mesoporous composite structure. Higher nitrogen content was detected on the surface of NCBC (8.17%) compared to that of urea directly modified biochar (4.63%). Nitrogen observed on the surface of NCBC was presented as graphitic N, pyrrolic N, amine N as well as pyridinic N. Kinetic and isothermal investigations revealed the active sites on NCBC to be homogeneous and bind to CR mainly by chemisorption. Calculated maximum sorption of CR on NCBC was 2512.82 mg/g basing on Langmuir model. Moreover, the practicality of NCBC was further proved by the cultivation of Nelumbo nucifera Gaertn. and Penicillium .
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Evans Dovi,Aaron Albert Aryee,Alexander Nti Kani,Farid Mzee Mpatani,Jianjun Li,Zhaohui Li,Lingbo Qu,Runping Han
Several pollutants found in industrial wastewater , such as Congo red dyes (CR), have been shown to be toxic to organisms. To protect human health and the environment, industrial effluents must be purified before being released into bodies of water. In order to effectively remove CR from the solution, amino functionalized walnut shells (WNS) were synthesized. Batch and fixed-bed column systems were used in this research. The Langmuir isotherm model fits the experimental findings well in these two systems, whereas the pseudo-second-order and Thomas kinetic models characterize batch and column CR adsorption, respectively. The adsorption capacity of ACWNS toward CR was to 224.4 mg g −1 at 303 K from Langmuir model. Electrostatic interactions and hydrogen bonding may be the mechanisms. The column research showed that adsorption was more favorable at low inlet solution concentration, low flow rate, or high column depth. The column mass transfer capacity parameter (B) increased with increasing concentration (0.461, 1.59, and 2.47 for 50, 100, and 150 mg L −1 , respectively) owing to a greater driving force for CR adsorption onto ACWNS, while adsorbate–adsorbent affinity (β) exhibited a reverse trend. The regeneration property of CR-loaded ACWNS was excellent using NaOH solution. The thermodynamic study revealed that CR removal was both spontaneous and endothermic. ACWNS is promising to remove CR from the solution.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
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IF 4.1
Song He,Junwei Sun,Xin Jin,Qilin Chen,Xiya Wu,Fuliang Tian,Xiaoqian Zhang,Ping Li,Hongliang Sheng
In this study, a microporous activated carbon (AC) with excellent performance was successfully prepared by KOH impregnation activation method using edamame shell as raw material. The synthesized AC with high specific surface area and pore volume can be effectively used for the adsorption and removal of Congo red (CR) from wastewater. Nitrogen adsorption isotherms , Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and zeta potential were used to characterize the structure of activated carbon. The ultra-high surface area and well-developed pore volume provided sufficient adsorption sites for CR adsorption, and the maximum adsorption effect of AC on CR was up to 1509.60 mg/g at 25 °C. The effects of pH, contact time, temperature and adsorbent mass on CR adsorption were investigated. In addition, the effects of different cations (Ca 2+ , Na + , K + , NH 4 + ) on the CR adsorption of anionic dyes were focused by adding different concentrations (10 mM, 20 mM, 30 mM) of cations. The results showed that Ca 2+ , Na + and K + had a significant promotion effect on the CR adsorption of AC, among which Ca 2+ had the most obvious promotion effect. Through model fitting, CR adsorption by AC conforms to Liu adsorption isotherm model and Elovich kinetic model . The results showed that the addition of cations could substantially improve the adsorption capacity of AC on the anionic dye CR, which has potential application in the field of dye wastewater treatment .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Siyuan Yu,Boxuan Peng,Pengfei Wu,Jiahui Li,Qingyun Liu,Shuo Li,Yuanyuan Gu,Ying Liu,Zichang Lu,Jingbao Wang,Jinfeng Xing
To achieve effective adsorptive removal of Congo red (CR) from wastewater, magnetic chitosan microspheres CTS-Fe 3 O 4 were initially synthesized through emulsion crosslinking, followed by the preparation of polydopamine-coated microspheres PDA-CTS-Fe 3 O 4 via deposition of polydopamine (PDA) onto CTS-Fe 3 O 4. The physicochemical properties of synthesized microspheres were systematically characterized. The influence of adsorbent dosage, contact time, pH, ionic strength, and temperature was investigated, and the results demonstrated that PDA-CTS-Fe 3 O 4 (679.99 mg·g −1 ) exhibited superior adsorption performance compared with CTS-Fe 3 O 4 (595.21 mg·g −1 ) towards CR. The adsorption processes of both microspheres adhered to the pseudo-first-order kinetic model and Langmuir isotherm model, and were determined to be spontaneous and endothermic. The adsorption energy between PDA-CTS-Fe 3 O 4 and CR was higher than that between CTS-Fe 3 O 4 and CR, and the enhanced adsorption capacity of CR onto PDA-CTS-Fe 3 O 4 was attributed to the synergistic effect of π-π stacking interaction, hydrogen bonding, and electrostatic attractive force.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）