Journal of Nanomaterials
·
2014
·
IF 1.611
Lu Zeng,Ligang Yang,Shuping Wang,Kai Yang
Different crystalline calcium silicate hydrates (CSH) were synthesized under specific hydrothermal conditions and several methods were used to analyze samples. Amorphous calcium silicate hydrates (ACSH) mainly consists of disordered calcium silicate hydrate gel (C-S-H gel) and crystalline calcium silicate hydrates (CCSH) consists of crystallized tobermorite. The adsorption of carcinogenic aflatoxin B1 (AFB1) onto ACSH and CCSH was investigated. The adsorption kinetics was studied using pseudo-first-order and pseudo-second-order kinetic models and intraparticle diffusion model. The pseudo-second-order model provided the best correlation and the intraparticle diffusion controlled the adsorption process of AFB1 onto CCSH. Adsorption isotherm parameters were obtained from Langmuir and Freundlich and the adsorption data fitted to Freundlich much better. Based on the results of N2 adsorption/desorption, adsorption kinetics, and adsorption isotherms, the adsorption mechanism of AFB1 onto CCSH was developed. All results indicate that CCSH has a great potential to be a safe, easy-made, and cost-effective material for the control of AFB1 contamination.
研究领域:
食品科学
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环境工程
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材料科学
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产品关联
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 33
·期 9
·2659-2667
·
IF 1.408
Xu Wenjing,Zhang Wensheng,Li Yan,Li Wei
A new acrylic-lignosulfonate resin (ALR) was obtained by radical polymerization using calcium lignosulfonate (LS-Ca) and acrylic acid (AA) as raw materials. ALR was characterized using FT-IR, SEM, TG-DSC and N 2 adsorption–desorption surface area and pore size analyzer. Batch adsorption, including initial concentration, time, pH, dosage and temperature on the adsorption of crystal violet (CV) by ALR, was systematically studied. The ALR contained porous structure and the specific surface area of ALR was 190.55 m 2 /g with average pore diameter 11.34 nm. The kinetic and equilibrium data fitted into the pseudo-second-order model and Freundlich isotherm model, respectively. The adsorption process was slightly influenced in the range of pH=3–12. The maximum adsorption capacity of CV was found to be as high as 150.40±4.80mg/g for 24 h at 25 °C. Thermodynamic parameters were evaluated, and their values indicated that adsorption of CV on ALR was an exothermic process and spontaneous.
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
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 8
·3613-3631
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IF 3.134
Zhu Hai,Qiu Junqiang,Zhou Dan,Wang Haiyang,Xu Dan,Li Haixia
A series of activated carbon (CFAC-n, n = 1,2,3,4) adsorbents of higher adsorption capacity were synthesized through coconut fiber carbon (CFAC-0) and KOH activator (CFAC-0:KOH = 1:1, 1:2, 1:3, 1:4), respectively, by the heating method for chloramphenicol (CHL) adsorption. The pore diameter, pore volume, specific surface area and surface functional groups of CFAC-n were determined by several characterizations such as BET, XRD, Raman, TEM, FTIR and XPS. The adsorption kinetics of CFAC-n for CHL removal were investigated and the kinetic parameters were also calculated. According to the results, the adsorption capacity onto CFAC-n was positively correlated to the specific surface area. CFAC-3 possessed the largest specific surface area (1755 m 2 g −1 ) and the best adsorption amount (523.0 mg g −1 ). The adsorption conditions (adsorbent dosage, antibiotic initial concentration, adsorption temperature and pH value) of CFAC-3 showed to be directly related to the adsorption effect. In addition, it was found that the CHL adsorption onto CFAC-n was well suitable for fitting with pseudo-second-order kinetic model and Elovich kinetics model. The adsorption isotherm was carried on and it was found that CHL adsorption onto CFAC best fitted to Freundlich and Temkin model. Those results revealed that the adsorption process was heterogeneous adsorption by main chemisorption. The adsorption capacity for CHL onto CHAC-3 was much higher than those of reported low-cost adsorbents. The adsorption included mainly hydrogen bond and π–π conjugation interactions, and electrostatic interaction.
研究领域:
环境科学
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材料科学
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废水处理
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2023
·
IF 8.4
Deming Zhao,Yiting Liu,Chunxin Wu
The research on developing a purification technology for Cr(Ⅵ) polluted water with high efficiency and the low energy consumption is crucial for achieving several Sustainable Development Goals (SDGs). In order to achieve these goals, Fe 3 O 4 @SiO 2 -APTMS nanocomposites were prepared by Fe 3 O 4 nanoparticles modified with silica and 3-aminopropyltrimethoxysilane in the presence of ultrasonic irradiation. The nanocomposites were characterized by TEM, FT-IR, VSM, TGA, BET, XRD, XPS and these analytic results proved that the nanocomposites were successfully prepared. The influential factors of Fe 3 O 4 @SiO 2 -APTMS on Cr(Ⅵ) adsorption have been explored and better experimental conditions have been obtained. The adsorption isotherm conformed to the Freundlich model. Pseudo-second-order kinetic model provided a better correlation for the experimental data compared to other kinetic models. Thermodynamic parameters for adsorption indicated that the adsorption of Cr(Ⅵ) was a spontaneous process. It was speculated that the adsorption mechanism of this adsorbent includes redox, electrostatic adsorption and physical adsorption. In summary, the Fe 3 O 4 @SiO 2 -APTMS nanocomposites were of great significance to human health and the remediation of heavy ion pollution, contributing to achievement of the Sustainable Development Goals (SDGs), including SDG-3, SDG-6.
研究领域:
环境科学
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材料科学
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可持续发展研究
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Junfeng Chen,Hanwen Hu,Junhan Yang,Hanhan Xue,Yuping Tian,Keyan Fan,Zhixin Zeng,Jiaqi Yang,Renjun Wang,Yanyan Liu
A novel macro-architectures material Fe 3 O 4 -N-GO@sodium alginate (SA) gel film was successfully produced, which was used to remove series azo dye wastewater. The optimal adsorption rates were attained, which achieved the maximum removal efficiency of 74.22%, 45.72%, 37.75% for Congo Red, Acid Orange 7 and Amino Black 10B respectively, under the condition that the mass ratio of Fe 3 O 4 -N-GO to sodium alginate was 0.11. The optimal adsorption temperature for three dyes was 30 ℃ and the adsorption equilibrium was reached at 150 min. The adsorption kinetic model of Fe 3 O 4 -N-GO@SA for the three azo dyes conformed to the quasi-second-order reaction model, and the adsorption isotherm was more in line with the Freundlich adsorption. The adsorption mechanism was multi-layer heterogeneous adsorption under the combined action of physical adsorption and chemisorption, and chemisorption was the main step of controlling the speed. The study would provide theoretical basis for the application of macro-architectures material in environment.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 10
·26191-26207
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IF 5.19
Lu Yanrong,Lin Hai,Zhang Ye,Dong Yingbo
In this study, sodium lignosulfonate modified illite (LS-ILT), an environmentally friendly adsorbent, was prepared by hydrothermal modification. An extensive study of Pb(II) and Cd(II) adsorption behavior and the mechanisms were conducted by evaluating the effects of initial pH value, sorbents dosage, and initial concentration of Pb(II) and Cd(II). Results showed that the adsorption characteristics of Pb(II) and Cd(II) by LS-ILT were well described by quasi-second-order kinetics and the Freundlich model, and the maximum adsorption capacity of Pb(II) and Cd(II) was 42.3 mg/g and 17.0 mg/g, respectively. The optimal application conditions for adsorption equilibrium were the dosage of 4 g/L and reaction pH = 5.5–5.8. The adsorption stability of Pb(II) by LS-ILT was better than that of Cd(II), and most of the existence of coexisting cations had no obvious inhibitory effect on the removal of Pb(II) and Cd(II). Furthermore, the dynamic adsorption results showed that LS-ILT can meet the ultra-low emission standard, and the adsorption capacity could maintain over 50% after four cycles, further providing certain guiding significance for the treatment of wastewater with ultra-low concentrations of heavy metals Pb(II) and Cd(II).
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
ACS Omega
·
2025
·
IF 4.3
Hongping Quan,Jinsui Li,Xingde Zhang,Yucheng Jia,Xing Yang
Acidification is an important procedure to remove the plug and retard the acid–rock reaction to make acid reach deeper formations, which is beneficial for reservoir stimulation. The adsorption-type acidification retarding agent could form an adsorption film on the rock surface to isolate H+, resulting in a lower rate of the acid–rock reaction. In this study, the retarding agent AD-2 was synthesized by free radical polymerization using acrylamide (AM), octadecyl dimethyl allyl ammonium chloride (DMAAC-18), and allyloxypolyethylene glycol (APEG-2400) as raw materials, while AD-1 was synthesized from AM and DMAAC-18. The results of the Fourier transform infrared (FT-IR) spectrum and 1H nuclear magnetic resonance (1H NMR) indicated that the two retarding agents were successfully prepared. The adsorption behavior of AD-1 and AD-2 on the carbonate rock surface matched the Freundlich model and the adsorption capacity of AD-2 was about 3 times that of AD-1 at 70 °C and 9000 mg/L. Meanwhile, the higher the temperature, the greater the adsorption capacity of AD-2, but it was the opposite for AD-1. Furthermore, the introduction of the polyoxyethylene ether group was conducive to enhancing adhesion force and forming a dense adsorption film on the carbonate rock surface, which was evidenced by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The retarding rate of AD-2 and AD-1 was 90.1% and 78.3%, respectively, because the retarding agent AD-2 containing polyoxyethylene ether formed a much denser adsorption film on the rock surface. In addition, the viscosity of 9000 mg/L AD-2 retarding acid solution was as low as 12 mPa·s, compared with that of AD-1 retarding acid solution (42 mPa·s). This research could provide a reference for the design of an adsorption acidification retarding agent with low viscosity in reservoir stimulation.
研究领域:
石油工程
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储层改造
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吸附科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2023
·Vol. 111
·期 3
·1-8
·
IF 2.7
Hu Xin,Zheng Fengmian,Yin Li,Huang Heyong,Li Shiyin
Colloidal particles, mixture with continuous molecular weight distribution and multiple organic components, is widespread in lake and have significant impact on the retention, migration, transportation, and fate of contaminants in lake ecosystems. Here we extract sedimentary colloids from algal growth dominant area (AD) in Taihu Lake and further separated into four different particle size ranges by cross-flow ultra-filtration (CFUF). The interaction mechanism between colloids and Microcystin-LR (MC-LR) was investigated under different cation conditions by dialysis equilibrium experiment method. Adsorption kinetics research shows the adsorption of MC-LR by colloids follows second-order kinetics and can be simulated by Freundlich isotherms. The effects of different cations on colloids-MC-LR interaction shows the addition of Mg(II) decreased colloids-MC-LR interaction, while Cu(II) increased colloids-MC-LR binding. MC-LR also increased Cu(II) binding to colloids, while MC-LR decreased Mg(II) binding. Therefore, different effect of cations to colloids-MC-LR interaction was proposed.
研究领域:
环境化学
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胶体与界面科学
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毒理学
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水生态学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Xiuna Jia,Sijia Li,Yudan Wang,Ting Wang,Xiaohong Hou
The occurrence of numerous antibiotics, such as sulfonamides (SAs), in environmental water has recently heightened concerns in consideration of their potential threat to human health and aquatic ecosystems. The removal of pharmaceuticals by adsorption comprises some of the most promising techniques because of their easy regeneration, low cost, and high efficiency. In this work, MIL-101(Cr)@GO, with a high surface area, was synthesized. Its adsorption properties toward three SAs were examined in batch adsorption experiments to probe the underlying factors of adsorption behavior and the mechanism for the first time. The pronounced factors that influenced the adsorption and removal process were investigated. The adsorption kinetics and isotherms were studied in order to characterize the operation. The adsorption kinetics demonstrated that the adsorption process would match the pseudo-second-order kinetic model. Furthermore, the adsorption was spontaneous, entropy was decreased, and the process was exothermic, and the equilibrium data was more appropriate described by the Freundlich isotherm model. Moreover, the adsorption–desorption of MIL-101(Cr)@GO could be consecutively cycled at least five times. MIL-101(Cr)@GO exhibited remarkable removal efficiency compared to MIL-100(Fe), MIL-101(Cr), and other adsorbents. These results demonstrated that MIL-101(Cr)@GO would be a promising adsorbent for the removal of sulfonamides from water samples and even for environmental protection.
研究领域:
环境科学
·
化学工程
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
Toxics
·
2025
·Vol. 13
·期 8
·686
·
IF 4.1
Qi Wang,Aiguo Gu,Hongzhen Lian,Jie Zou
Understanding the differences in the adsorption behaviors of tetrabromobisphenol A (TBBPA) and tetrabromobisphenol S (TBBPS) on soils is critical for assessing their environmental mobility and risks. This study investigated the adsorption characteristics and patterns of TBBPA/S across various soil types. Adsorption kinetics analysis indicated that the adsorption of TBBPA/S on soils followed pseudo-secondary-order kinetics. Isotherm results revealed that the Langmuir model described TBBPA adsorption more accurately, while the Freundlich model was a better fit for TBBPS adsorption, suggesting distinct adsorption mechanisms due to their differing properties. Correlation analysis and principal component analysis (PCA) were performed to identify the key soil physicochemical properties influencing TBBPA/S adsorption. The results showed that TBBPA adsorption was inversely correlated with soil pH and positively correlated with clay content. In contrast, TBBPS adsorption displayed negative correlations with soil pH and sand content, and positive correlations with amorphous iron, amorphous aluminum, and free iron content. Further analysis of different treated soil fractions demonstrated that soil organic matter dominated the adsorption of TBBPA/S, with humic acid playing a more significant role than humin. The adsorption behavior characteristics of TBBPA/S on different soils provide fundamental data for understanding their environmental fate in soil systems.
研究领域:
环境科学
·
土壤化学
·
污染物吸附
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环境风险评估
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 7
·3630-3639
·
IF 3.591
Kaijia Li,Hongxiang Ou,Dongsheng Zhou,Chenxia Gong,Honglai Xue,Yuyan Li
Graphene oxide (GO) has the advantages of a high specific surface area and great mechanical properties, which make it useful in the field of adsorption; however, it is difficult to obtain and utilize nano-size GO for adsorption and separation. In this study, zinc ion crosslinked GO and sodium alginate aerogel microspheres (Zn–GO@SA) were prepared using the ion–gel method and used for ciprofloxacin (CIP) adsorption, and this was easy to separate and collect from solutions. Methods such as SEM, EDX, FT-IR, and TGA were used for physical and chemical characterization. The adsorption properties and mechanisms were examined via static and dynamic adsorption experiments. The results indicated that the Zn–GO@SA aerogel microspheres had abundant and ordered cavities. The adsorption isotherm and kinetic data fitting results showed that the adsorption process was consistent with the Freundlich model and a quasi-second-order kinetics model. The adsorption of CIP was a multi-layer adsorption process dominated by chemical adsorption. At 308 K, the maximum adsorption capacity was 134.85 mg g−1, while increasing the adsorption temperature had an adverse effect on CIP adsorption. The results of regeneration and dynamic adsorption experiments showed that Zn–GO@SA aerogel microspheres maintained good adsorption performance after repeated use, which means they have potential for practical applications.
研究领域:
环境科学
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材料科学
·
药物化学
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产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 2
·189
·
IF 4.7
Qiang Yang,Jia Zhang,Hairong Yin,Junkang Guo,Shenghua Lv,Yaofeng Li
In this work, acrylic cellulose hydrogel, a typical natural polymer adsorbent, was modified using MXene through in situ polymerization to create a synthetic inorganic–polymer composite known as MXene/cellulose hydrogel. FTIR, XRD, SEM, and thermogravimetric analyses were applied to characterize the chemical structure and micromorphology. The MXene/cellulose hydrogel was utilized for the removal of Pb2+from wastewater. Under optimal experimental conditions (initial Pb2+concentration of 0.04 mol/L, adsorption time of 150 min, pH = 5.5, and MXene doping content of 50% at 30 °C), a maximum adsorption capacity of 410.57 mg/g was achieved. The MXene/cellulose hydrogel corresponded with the pseudo-second-order kinetic equation model and exhibited a better fit with the Freundlich isotherm model.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）