ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2018
·Vol. 25
·期 14
·13813-13822
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IF 2.8
Liu Tongzhou,Gu Yurong,Xing Ding Yu,Dong Wenyi,Wu Xiuwei
Adsorption is well accepted as an effective method for perfluorinated compounds’ (PFCs) removal from water among various conventional methods. However, development of adsorbents that combine good performance of PFC removal and regenerability has not yet been realized. This work demonstrated the fabrication and application of an ammoniated magnetic adsorbent for efficient and economical PFOS and PFOA removal. Functional ammonium groups and γ-Fe 2 O 3 were effectively incorporated in the particle with the proposed method. These fabricated magnetic particles presented superior adsorption performance for PFOS and PFOA with short equilibrium time of 120 min and high adsorption capacity. The isotherms revealed that the adsorption process belonged to multilayer sorption with their intricate interactions including anion exchange and hydrophobic interaction. The magnetic particle maintained its removal efficacy over a wide pH range of 3–9 or with coexisting substances. Moreover, the regeneration and reuse of the magnetic particle were successfully carried out with PFOS and PFOA removal efficiency sustained higher than 80% in 15 consecutive treatment cycles. Along with the efficient adsorption and easy separation of adsorbents, we expect that this ammoniated magnetic particle can serve as an excellent alternative for PFOS and PFOA removal from water.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Pengfei Yang,Xiaozhe Hu,Jin Zhou,Haixiang Li,Asfandyar Shahab,Liangquan Lu,Hua Zhang
Given the severe threat posed by heavy metal pollution to both the ecological environment and human health, the development of green, efficient and sustainable adsorbents has become a major research focus. Herein, a novel heavy metal ions adsorbent (De-UiO-66-IDSA) was synthesized by functionalizing defect UiO-66 with the biodegradable chelating agent iminodisuccinic acid (IDSA). The effects of different factors on the adsorption of Pb 2+ , Cu 2+ and Cd 2+ by UiO-66-IDSA were investigated, including IDSA loading, contact time, adsorbent dosage and pH. Batch adsorption experiments showed that the adsorption kinetics followed PSO model, while the isotherm data were best described by the Langmuir model, indicating a monolayer chemisorption process. The maximum adsorption capacities for Pb 2+ , Cu 2+ and Cd 2+ were 377.40, 163.60, and 204.10 mg/g at 298 K, respectively and the adsorption was spontaneous and endothermic. Moreover, regeneration experiments demonstrated that the adsorbent retained over 75 % of its removal efficiency for all three metal ions after 5 cycles. These results highlight the great potential of De-UiO-66-IDSA as a green, high-performance, and a regenerable adsorbent capable of effectively eliminating heavy metal ions from aqueous media.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Yuting Li,Yueyang Xu,Erjian Huang,Liming Kong,Yongping Zeng
Thiophene-like sulfides present in fuel oil release sulfur oxides (SO x ) during combustion, which pose significant risks for both environmental sustainability and public health. Adsorption desulfurization (ADS) has garnered considerable attention because of its mild operating conditions, low production costs, and minimal impact on the octane number of fuels. Metal-organic frameworks used as desulfurizing adsorbents provide several advantages, including a high specific surface area and easily adjustable structures . Here, we synthesized the micro/mesoporous adsorbent CeO 2 @HP-HKUST-1 (CeO 2 @Hierarchical Porous-Hong Kong University of Science and Technology-1) through the hybridization of salicylic acid (SA) using a solvothermal method. We assessed the adsorption performance of CeO 2 @HP- HKUST-1 _ 1.5 for benzothiophene and thiophene through batch and breakthrough adsorption experiments. The adsorption capacities for thiophene and benzothiophene were measured at 21.2 mg S/g and 35.3 mg S/g, respectively. Remarkably, in competitive toluene experiments, the adsorption capacity for benzothiophene remained significant at 28.9 mg S/g, due to enhanced Ce–S bonding interactions and the exposure of unsaturated metal centers of Cu. Additionally, regeneration experiments demonstrated that CeO 2 @HP-HKUST-1 retained excellent adsorption capacities after four cycles. These findings highlight the potential of CeO 2 @HP-HKUST-1 as an effective adsorbent for desulfurization applications.
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
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
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IF 5.455
Jingting Su,Hui Lu,Fang Wang,Yu Lu,Ruohu Zhang,Jun Xiao,Yiping Cui,Li Zhu
Cooperative adsorption and degradation in situ, known as “hook and destroy” strategy, is an appealing idea to scavenge pollutants from water efficiently. However, commercial high-adsorption-capacity adsorbents are usually based on activated carbon, which is easily damaged in the pollutant degradation process, resulting in decreasing of the adsorption performance, while the adsorption capability of most inorganic adsorbents is inadequate for practical applications. To address the issues, we prepared a novel mesoporous titanium dioxide (m-TiO 2 ) by facile one-step hydrolysis method at room temperature. The m-TiO 2 exhibits both high adsorption capacity and short equilibrium time for a wide range of pollutants, such as dyes, pharmaceuticals and pesticides, due to its large surface area and abundant functional groups. The surface charge of the m-TiO 2 adsorbent can be regulated by adjusting the acidity and alkalinity of preparation conditions, hence the m-TiO 2 is capable of adsorbing either positively or negatively charged pollutants. The versatility for adsorption of diverse contaminants was demonstrated in the experiment of purifying lake water with multiple pollutants. More significant, the m-TiO 2 can be regenerated in minutes by in-situ degrading the adsorbed molecules using common oxidants, such as hypochlorite, the active ingredient of disinfectants. The adsorption performance has little deterioration in at least five successive cycles of adsorption and degradation. Considering the excellent adsorption performance, wide applicability and high recyclability, the mesoporous TiO 2 offers a sustainable approach to increasingly complex water environmental problems.
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
·
2018
·Vol. 8
·期 66
·38124-38130
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IF 2.936
Jiaojing Zhang,Hua Song,Yanguang Chen,Tianzhen Hao,Feng Li,Dandan Yuan,Xueqin Wang,Liang Zhao,Jinsen Gao
Amine-modified MCM-41 adsorbents (APTMS/MCM-41, PEI/MCM-41 and AAPTS/MCM-41) were prepared and characterized by XRD, N2 adsorption–desorption, FT-IR, TEM, SEM and TG-DTA. The performance of each adsorbent in a fixed adsorption bed for H2S removal was measured using a mixture of oxygen, nitrogen and hydrogen sulfide gases. It was found that the specific surface area decreased and the topography changed significantly after the use of each modified adsorbent. Nevertheless, all amine-modified MCM-41 adsorbents retained mesoporous silica of MCM-41. The H2S removal rate and saturated H2S capacity of APTMS/MCM-41 improved from 32.3% to 54.2% and 119.5 to 134.4 mg g−1, respectively, compared with that of MCM-41, and it showed the best performance among all adsorbents. APTMS/MCM-41, PEI/MCM-41 and AAPTS/MCM-41 were regenerated by maintaining at 423, 523 and 373 K in nitrogen for 3 h, respectively, and thus possessed high regenerability.
研究领域:
化学工程
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材料科学
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PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2024
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IF 1.5
Lei Miao,Zhang Jun,Liu Chang,Guo Junpeng,Li Ye
Herein, S-nZVI was synthesized to remove U(VI) from seawater. At a S/Fe ratio of 0.18 and pH of 5, adsorption of U(VI) reached equilibrium after 20 min with the removal rate of 97.93%. And the maximum adsorption capacity obtained by Langmuir isothermal model was 1177.09 mg/g. Moreover, S-nZVI exhibited selectivity in the presence of interfering ions, regeneration performance in 5 reuse cycles, and high removal efficiency in actual seawater. Mechanism investigations showed that UO 2 2+ uniformly adsorbed on S-nZVI surface was irreversibly reduced and generated UO 2 precipitates due to the electrons provided by S 2− , S 2 2− and Fe(II).
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
Materials Today Communications
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2024
·
IF 3.7
Cheng-rui Xie,Yi-xuan Song,Gang Yang,Cheng-gong Sun,Xiang Luo,Tao Wu
The increasing presence of synthetic dyes in wastewater poses a serious environmental threat, necessitating the development of efficient adsorbents for their removal. In this study, a highly porous carbonaceous adsorbent, Fe@C-350, was synthesized through direct carbonisation of MOF-235 under an argon atmosphere for efficient removal of methyl orange from wastewater. Compared to MOF-235, Fe@C-350 retains the inherent structure of MOF-235 while exhibiting a larger BET surface area and increased pore size. The use of Fe@C-350 as an adsorbent in methyl orange adsorption demonstrates exceptional adsorption capabilities over a broad pH range with a maximum adsorption capacity of 1666.7 mg·g −1 . The isotherm analyses indicate that the adsorption process is primarily determined by monolayer physical adsorption. The kinetic studies revealed a rapid adsorption rate, characterized by a high-rate constant of 0.025 g·mg −1 ·min −1 . This can be attributed to the suitable pore size and abundant adsorption sites that facilitate the removal of methyl orange. Further investigation confirmed that Fe@C-350 retained over 98 % of its initial adsorption capacity after 10 regeneration cycles, thus confirming physical adsorption as the fundamental mechanism. Based on these findings, it can be concluded that Fe@C-350 is of significant potential as a promising candidate for the efficient removal of methyl orange from dye-containing wastewater. However, future research is necessary to show its application to the removal of a broader range of contaminants, aiming at enhancing its environmental impact and industrial viability.
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
·
2022
·Vol. 12
·期 52
·33716-33724
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IF 4.036
Jie Hu,Lei Li,Hao Li,Ying Zhai,Fushun Tang,Zhe Zhang,Banglin Chen
The mixed bimetal metal–organic framework Ni0.37Co0.63-MOF-74 has been constructed by the solvothermal method for NO adsorption. The results showed that bimetal Ni0.37Co0.63-MOF-74 takes up NO with a capacity of up to 174.3 cc g−1 under ambient conditions, which is 16.3% higher than that of the best single metal Co-MOF-74. The IAST adsorption selectivity for a NO/CO2 binary mixture can reach a maximum of 710 at low adsorption partial pressure, while the regeneration performance can be retained even after five cyclic adsorption–desorption experiments. Its separation performance was further confirmed by breakthrough experiments, indicating this new bimetal Ni0.37Co0.63-MOF-74 as one of the best materials for NO adsorption and separation in flue gas.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Lian-Kui Wu,Hao Wu,Zheng-Zheng Liu,Hua-Zhen Cao,Guang-Ya Hou,Yi-Ping Tang,Guo-Qu Zheng
A novel copper ferrite foam fabricated on Fe-Ni foam substrate was synthesized via a simple hydrothermal method to efficiently remove arsenic from aqueous solution. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-Ray diffraction pattern (XRD) and Raman spectra were used to characterize the morphology and surface composition of the copper ferrite foam (CFF). The adsorption behavior of As(III) and As(V) onto this CFF is studied as a function of solution pH, temperature, contact time, and different concentrations. Results shown that this CFF has high adsorption capacity and excellent recyclability . Adsorption isotherms study indicates Langmuir model of adsorption. The maximum adsorption capability of As(III) and As(V) on CuFe 2 O 4 foam is observed about 44.0 mg g −1 and 85.4 mg g −1 , respectively. Regeneration experiment indicates that arsenic could be easily desorbed from CFF with 0.10 mol L −1 NaOH and the high adsorption capacity can be maintained for six regeneration cycle.
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
BIOSENSORS & BIOELECTRONICS
·
2016
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IF 7.476
Yanchen Liu,Xiangqing Wang,Hui Wu
Mercury is a bioaccumulative and highly toxic heavy metal . Thus, the removal and detection of Hg 2+ from the environment is a major challenge. This paper reports a novel bio-nanomaterial for the simultaneous determination and removal of Hg 2+ with the use of rGO-Fe 3 O 4 functionalized with Hg 2+ -specific thymine oligonucleotide (T-DNA). T-DNA interacts with Hg 2+ and changes from having a random coil into a hairpin structure, thereby increasing the fluorescence of SYBR Green I. Such fluorescence turn-on process allows the detection of Hg 2+ in the concentration range of 1–20 ng/mL, with a detection limit of 0.82 ng/mL. Removal is achieved by exploiting the T-Hg 2+ -T base pairs and the large surface area of graphene; these bio-nanocomposites exhibit excellent removal efficiency (over 80%) and rapid separation from the aqueous solution. Moreover, bio-nanomaterials can be regenerated after a simple treatment. The proposed method also demonstrates the evident practicability of the simultaneous detection and removal of Hg 2+ in lake water samples.
研究领域:
环境科学
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生物技术
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材料科学
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DOI
PubMed
高影响因子
ChemPlusChem
·
2017
·Vol. 82
·期 9
·1218-1223
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IF 2.797
Shun Yang,Shiting Lin,Jie Fan,Yaru Wang,Chang Liu,Xiao Yan
Graphical Twice as nice : The porous structure and well-defined cavities of a β-cyclodextrin-decorated polymer were combined with the photoactivity of SnS 2 in a new material for the simultaneous adsorption and photodegradation of organic pollutants. The SnS 2 -modified polymer was derived from nucleophilic aromatic substitution of the hydroxyl groups of both β-CD and SnS 2 -OH by tetrafluoroterephthalonitrile. The discharge of organic pollutants poses a serious threat to public health and the environment. Developing new strategies and materials to remove organic pollutants from water efficiently and completely is of great importance. Herein, a SnS 2 -modified porous β-cyclodextrin-containing polymer (SnS 2 @PCDP), which was derived by nucleophilic aromatic substitution of the hydroxyl groups of both β-CD and SnS 2 −OH by tetrafluoroterephthalonitrile, was prepared for the rapid, complete removal of organic pollutants from water . The porous structure and well-defined cavities of β-CD endow SnS 2 @PCDP with a facile and high adsorption capacity, and the modification with SnS 2 leads to simultaneous adsorption and photodegradation processes for the rapid and complete removal of organic pollutants. In addition, SnS 2 @PCDP can be regenerated several times using light irradiation with no loss in performance. Overall, the efficient removal performance and excellent reusability indicate that SnS 2 @PCDP has potential for practical applications in the efficient treatment of organic pollutants.
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
ADSORPTION SCIENCE & TECHNOLOGY
·
2022
·
IF 4.373
Zhijuan Zhang,Pengwei Li,Ting Zhao,Yuanhan Xia
The ZIF-8 crystals were successfully postsynthetically modified using methylamine (MA), ethylenediamine (ED), and N, N-dimethylethylenediamine (MMEN) to improve their adsorption performance toward CO2. Results showed that, compared with the original ZIF-8, the BET specific surface area of MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 has increased by 118.2%, 92.0%, and 29.8%, respectively. In addition, their total pore volume increased separately by 130.8%, 100%, and 48.7%. The adsorption capacities of CO2 on the amine-modified ZIF-8 samples followed the order . The CO2 adsorption capacities at 298 K on MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 were increased by 118.2%, 90.2%, and 29.8%, respectively. What is more, the CO2/N2 selectivities calculated using an IAST model of the amine@ZIF-8 samples at 0.01 bar and 298 K were also significantly improved and followed the order , which increased by 173.0%, 121.4%, and 22.6%, respectively. The isosteric heat of CO2 adsorption () on the MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 all becomes higher, while of N2 on these samples was slightly lower in comparison with that on the ZIF-8. Furthermore, after six recycle runs of gravimetric CO2 adsorption-desorption on MA-ZIF-8, the adsorption performance of CO2 is still very good, indicating that the MA-ZIF-8 sample has good regeneration performance and can be applied into industrial CO2 adsorption and separation.
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
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