ACS Applied Nano Materials
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2021
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IF 5.097
Bin Zuo,Qinyue Deng,Han Shao,Bingbing Cao,Yunhui Fan,Wanfang Li,Mingxian Huang
In this work, we designed the Fe3O4@mesoporous-SiO2@chitosan@polyaniline core–shell nanoparticles (Fe3O4@mSiO2@CS@PANI, hence abbr. FSCP), which can be used to capture Cr(VI) in wastewater. Rapid adsorption behavior and high removal capability (249.6 mg Cr(VI) per gram of FSCP) were exhibited by this material. X-ray photoelectron spectroscopy (XPS) analysis demonstrates that Cr(VI) was adsorbed and in situ reduced on FSCP at pH 2. Adsorption was facilitated by the electrostatic attraction of HCrO4– and −N+═C–/–N+H–, while the active −NH–/–N+H– sparked the reduction of Cr(VI) to Cr(III). Moreover, the coordination of the resulting Cr(III) with the amino group promoted adsorption, thus achieving detoxification of Cr(VI) in wastewater. After eight recycling experiments, the Cr(VI) removal efficiency of this material is still more than 90%, indicating that this material has excellent stability and good application potential. Therefore, this magnetic adsorbent offers a potential solution for the successful handling of chromium-containing wastewater.
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
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 21
·17478-17485
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IF 3.201
Liying Yu,Yaoyao Qu,Fang Chai,Lihua Chen
The highly luminescent blue fluorescent carbon quantum dots (CQDs) were prepared via the one-step hydrothermal method using L-ascorbic acid (LAA) as a carbon source. The obtained carbon quantum dots (LAA-CQDs) demonstrated high sensitivity and selectivity for detecting Cu2+ and Hg2+ based on the efficient fluorescence quenching effect, with the lowest limits of 7.59 nM and 2.29 nM, respectively. Moreover, LAA-CQDs based paper sensors were fabricated, which showed a clear fluorescence response after being exposed to Cu2+ and Hg2+, with visual detection limits of 5 μM and 3 μM, respectively. The cyclic utilization of the paper sensors was realized by restoring their fluorescence after soaking them in saturated ethylene diamine tetraacetic acid solution. The sensors can be recycled to detect Cu2+ and Hg2+ ions for at least four turns, which was conducive to environmental protection and saving resources. The LAA-CQDs with good environmental applicability have been successfully applied for the detection of Cu2+ and Hg2+ ions in real environmental water samples. In addition, we verified the low toxicity and good biocompatibility of LAA-CQDs via cytotoxicity experiments and cell imaging.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
Materials
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2020
·Vol. 13
·期 2
·332
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IF 3.057
Xiaonan Li,Jinghua Li,Weilu Shi,Jianfeng Bao,Xianyuan Yang
In this study, uniform Fe3O4magnetic nanorings (Fe3O4-MNRs) were prepared through a simple hydrothermal method. The morphology, magnetic properties, and structure of the product were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), vibrating sample magnetometer (VSM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. The Fe3O4-MNRs were used as Fenton-like catalysts in the presence of hydrogen peroxide (H2O2) and showed excellent Fenton-catalytic activity for degradation of organic dyes such as Methylene blue (MB), Rhodamine B (RhB), and Bromophenol blue (BPB). Furthermore, the obtained Fe3O4-MNRs could be recycled after used for several times and still remained in a relative high activity and could rapidly be separated from the reaction medium using a magnet without considerable loss. All results reveal that Fe3O4-MNRs have potential for the treatment of dyes pollutants.Keywords:magnetic;Fenton;crystal structure;dyes degradation;recycling
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
Journal of Cleaner Production
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2022
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IF 11.072
Yuanlin Chen,Guangsheng Huo,Xueyi Guo,Qinmeng Wang
Acid digestion of tungsten concentrates has attracted more and more attention in recent years, sustainable extraction of tungsten from acid digestion product of tungsten concentrates to obtain (NH 4 ) 2 WO 4 solution with low impurity content is the key for ammonium paratungstate production. In this work, a process of extracting tungsten from acid digestion product by leaching-solvent extraction together with raffinate circulation was introduced. The acid digestion product was firstly leached by Na 2 CO 3 , and the leaching efficiency was 99.47% with circulation of Na 2 CO 3 solution converted from the raffinate of solvent extraction . The tungsten in pure Na 2 WO 4 solution with 121.26 g/L WO 3 could be almost completely extracted by solvents containing 15% N235 or 15% Alamine 308 in one stage. The extraction mechanism of N235 and Alamine 308 was the same, while Alamine 308 showed better performance and higher saturated loading capacities for tungsten extraction. The loaded tungsten was stripped from organic phases using NH 3 ·H 2 O with stripping efficiency of 99.98%, obtaining (NH 4 ) 2 WO 4 solutions with WO 3 concentration above 260 g/L and low impurity content. The raffinate containing high Na 2 SO 4 concentration was converted to Na 2 CO 3 solution by adding BaCO 3 and recycled for the leaching of digestion product, which could significantly reduce the discharge of sodium salt wastewater. The presented work provides a cleaner production route for preparing pure (NH 4 ) 2 WO 4 solution from acid digestion product of tungsten concentrates.
研究领域:
冶金工程
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环境科学
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DOI
高影响因子
Scientific Reports
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2024
·Vol. 14
·期 1
·1-16
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IF 3.8
Wang Qian,Gong Dehong,Zhang Zhongxiao,Zhu Jiangdong,Luo Qingling
The high energy consumption of Carbon Capture Utilization and Storage(CCUS) promotes the research of integrated absorption and mineralization technology. A novel DEEA/AEP biphasic absorbent is used to absorb \(\hbox {CO}_{2}\) . After phase separation, only one phase enriched with the absorption product is sent into the mineralization system, then reacts with \(\hbox {Ca(OH)}_{2}\) to produce \(\hbox {CaCO}_{3}\) at normal temperature and pressure. The effects of temperature, Ca/C and dispersion of the system were investigated, and cyclic utilization experiment was also conducted. The process was characterized and analyzed by Thermal gravimetric analysis (TGA), X-ray diffraction (XRD), and nuclear magnetic resonance ( 13 C NMR). The results showed that at 50 \(^{\circ }\) C, Ca/C = 1, the extent of mineralization of \(\hbox {CO}_{2}\) -enriched phase mineralization was 95.73% after ultrasonic treatment for 30 min. During 6 cycles, the volume percentage of \(\hbox {CO}_{2}\) -enriched phase could be maintained at 52–55%, and the \(\hbox {CO}_{2}\) load was 11.92mol/L. The results above indicate that the \(\hbox {CO}_{2}\) -enriched phase mineralization technology after absorption by biphasic absorbent can effectively capture \(\hbox {CO}_{2}\) , realize recycling, and reduce CCUS energy consumption.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Yun Liu,Yue-Fei Zhang,Jian Tang,Yuting Tan,Hang Lei,Ying Li,Pengmian Huang,Yan Li
In this study, we developed a novel chitosan-based adsorbent with low cost, high adsorption capacity and marvelous reusability. The adsorbent was prepared in one pot by crosslinking chitosan with acrolein , which was the first attempt to use acrolein as a crosslinking agent to achieve chitosan-based hydrogel (A/CS hydrogel). The A/CS hydrogel not only had the high swelling ratio as many as approximately 1300 times the dry hydrogel, but also has excellent adsorption property for the anion dye acid blue 93 (AB93). Under the optimal adsorption conditions, the adsorption capacity of the adsorbent on AB93 reached up to 1839 mg/g, which realized the ultra-high adsorption capacity. After 12 times of adsorption-desorption cycle, the adsorption rate of the adsorbent to AB93 was still about 90%, which revealed marvelous stability and reusability. The purpose of the present study was to provide a new choice of the elimination and recycle of AB93 and have potential for industrial application.
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
CHEMOSPHERE
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2022
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IF 8.943
Dongdong Liu,Dengqian Chen,Zhengkai Hao,Yibo Tang,Lipeng Jiang,Tianqi Li,Bing Tian,Cuiping Yan,Yuan Luo,Boyin Jia
In this work, a comparative study of efficient degradation of Rhodamine B (RhB) in CoFe 2 O 4 /H 2 O 2 and CoFe 2 O 4 /PMS systems was performed. Batch experiments indicated that the RhB degradation rate of CoFe 2 O 4 /H 2 O 2 system reached 95.5% at 90 min under the condition of 0.5 g L −1 of CoFe 2 O 4 dosage, 10 mM of H 2 O 2 concentration and 3.0 of initial pH. At certain conditions of initial pH = 7.0, 0.3 g L −1 of CoFe 2 O 4 dosage, 7 mM of PMS concentration, CoFe 2 O 4 /PMS system could completely degrade RhB within 90 min. EPR and quenching experiments indicated that •OH was the main active species of CoFe 2 O 4 /H 2 O 2 system, and •OH, SO 4 • - , •O 2 − and 1 O 2 participated in RhB degradation of CoFe 2 O 4 /PMS system. The circulate of Co(II)/Co(III) and Fe(II)/Fe(III) on the CoFe 2 O 4 surface promoted the formation of free radical species in the two system. In CoFe 2 O 4 /PMS system, the formed •O 2 − and SO 5 • - realized the generation of non-free radical species ( 1 O 2 ). The LC-MS results indicated that N -de-ethylation, chromophore cleavage, opening rings and mineralization were the main steps for the RhB degradation of the two systems. After five cycles of degradation experiment, the CoFe 2 O 4 /H 2 O 2 and CoFe 2 O 4 /PMS systems still maintained the high degradation rate (85.2% and 92.4%) and low mass loss (2.7% and 3.09%). In addition, CoFe 2 O 4 /PMS system had better potential value for the actual water and multi-pollutant degradation than CoFe 2 O 4 /H 2 O 2 system. Finally, the toxicity analysis and cost assessment of the two oxidation systems were preliminarily evaluated.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
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2023
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IF 7
Jiayu Qin,Linxue Yan,Senjian Han,Xiaonan Yang,Yafei Guo,Long Li,Tianlong Deng
As an effective adsorbent, prussian blue (PB) has been used to selectively eliminate radioactive cesium from the complex and change wastewater. Multiple attempts were introduced to refrain from the recovery difficulty of direct application of PB. This study designed a novel strategy of tannic acid (TA) assisted multilayer PB immobilization on a commercial substrate for cesium adsorption. As an effective binder, TA-Fe was successfully applied to immobilize and disperse PB to increase the number of active particles. The resulting composite membrane (M TA-PB ) showed excellent cesium selectivity with a high K d value of 8986 mL/g in geothermal water and maintained its cesium adsorption ability after 5 cycles. Compared with the reported PB powder, the loaded PB gave full play to the adsorption performance. The convenient fabrication method and effective removal of Cs from complex solutions demonstrated that the M TA-PB has excellent potential for practical application in low wastewater concentrations.
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
CRYSTAL RESEARCH AND TECHNOLOGY
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2018
·Vol. 53
·期 4
·1700225
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IF 1.122
Xin Liu,Yaping Dong,Xueying Nai,Ming Wei,Wu Li
Zinc borate mother solution is cycled to prepare 2ZnO·3B 2 O 3 ·7H 2 O, 3ZnO·5B 2 O 3 ·14H 2 O, and 4ZnO·B 2 O 3 ·H 2 O based on the properties of borate depolymerization. The results show uniform quadrilateral-prism-like and octahedron-like 2ZnO·3B 2 O 3 ·7H 2 O are synthesized at different temperatures. Flake-like 3ZnO·5B 2 O 3 ·14H 2 O is fabricated as reaction time prolonging, and 2ZnO·3B 2 O 3 ·7H 2 O changed into 3ZnO·5B 2 O 3 ·14H 2 O spontaneously. Meanwhile, resulting 2ZnO·3B 2 O 3 ·7H 2 O is investigated to fabricate high aspect ratio of 4ZnO·B 2 O 3 ·H 2 O whisker. Impressively, uniform 4ZnO·B 2 O 3 ·H 2 O whisker can be resynthesized by the filtrates of 2ZnO·3B 2 O 3 ·7H 2 O and 3ZnO·5B 2 O 3 ·14H 2 O via the zero-waste technology.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Gao Xiao,Jun Zhang,Mingzhu Zheng,Liyin Chen,Samson Afewerki,Manna Dai,Junling Guo
Organic micropollutants in wastewater containing arsanilic acid (p-ASA) can undergo a transformation into a highly toxic inorganic arsenic, impacting both the environment and human health. Adsorption materials such as Metal-organic frameworks (MOFs) have attracted great interest, yet their production methods are often complex, costly, and time-consuming, hindering large-scale production. We introduces an innovative, high-throughput microfluidic magnifiable manufacturing approach to expedite MOFs creation, enabling rapid, continuous, and parallel expandable scalable production of MOFs with a uniform microstructure in mere minutes, significantly outpacing the traditional, intermittently operated hydrothermal synthesis. The microfluidic-generated microstructured MF-UIO-66 has better organic arsenic adsorption capacity (333.3 mg/g), and maintained an 89.2 % effectiveness even after four cycles of reuse without generating harmful by-products. When compared to UIO-66 produced via conventional hydrothermal methods, the microfluidically synthesized MF-UIO-66 showcases not only a faster and more effective removal of varying concentrations of organic arsenic but also enhanced chemical stability and longevity. The novel microfluidic fabrication strategy holds great potential for the industrial-scale production of MF-UIO-66 at reduced costs and increased yields.
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
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jiandong Cui,Sizhu Ren,Tao Lin,Yuxiao Feng,Shiru Jia
Enzyme immobilization on solid supports is a valuable approach to address enzyme stability and reuse for continuous operations. However, the enzymes immobilized on the external surface of solid supports may not be protected by carriers and suffer inactivation caused by denaturing stresses and hazard external environment. Herein, we describe for the first time a enzyme-shielding strategy to prepare hybrid organic/inorganic nanobiocatalysts; it exploits the self-assembly of supramolecular metal-organic coordination complex (tannic acid (TA) and Fe 3+ ) at the surface of immobilized catalase on Fe 3 O 4 /silica core-shell nanospheres to grow a protective nanocoating (Fe 3+ -TA nanocoating). The nanocoatings around the immobilized catalase (Fe 3+ -TA@Fe 3 O 4 /SiO 2 -catalase) provide a “shield effect” to protect from biological, thermal and chemical degradation for enzyme. As a result, the stability of immobilized catalase against proteolytic agent, denaturants and heat were improved remarkably compared to the immobilized catalase without a protective nanocoating and free catalase. More importantly, the recycling of the immobilized catalase was improved remarkably. The Fe 3+ -TA@Fe 3 O 4 /SiO 2 -catalase still retained 55% of their original activity after 9 cycles, whereas the immobilized catalase without a protective nanocoating only retained 20% of original activity. These results demonstrated that the novel enzyme-shielding strategy is an efficient method to obtain stable and recycled biocatalyst with yolk-shell structure.
研究领域:
生物化学
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纳米技术
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酶工程
✓ 已验证
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DOI
高影响因子
HYDROMETALLURGY
·
2020
·
IF 3.338
Lei Tian,LinQing Huang,Jiacong Xu,Xiaoqiang Yu,Zhifeng Xu
Under the advocacy of the sustainable development concept, the extraction process and reaction mechanism for arsenic in alkaline solution were studied with the aim of optimizing the alkaline leaching process of high‑arsenic copper smelting ash and promoting the recovery and harmlessness of arsenic. At 25 °C, the extractant methyltrioctylammonium underwent 6–8 conversions of Na 2 CO 3 solution with a concentration fraction of 12%, and the extraction capacity of thioarsenite was increased to 86.91%. Furthermore, at 25 °C, at an O/A ratio of 1:1 and an phase contact time of 7 min, the thioarsenite stripping exceeded 99%, when using 4% H 2 O 2 + saturated Na 2 CO 3 solution as the stripping. Fourier transform infrared spectroscopy , nuclear magnetic spectroscopy, ultraviolet spectroscopy , and other analytical methods were used to determine the mechanism of the extraction process. It was evident from our experiments that the CO 3 2− -type TOMAC and Na 2 CO 3 solutions could be recycled and reused repeatedly. The overall process required simple materials and did not generate liquid waste . The technique involves a short process, with superior cycle performance, low cost, and high efficiency.
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
危险品化学品经营许可证（带存储）