POWDER TECHNOLOGY
·
2024
·
IF 4.5
Yu Zhu,Bihe Yuan,Zhezhe Tan,Zeyang Gao,Man Yang,Sining Chen
NH 3 ·H 2 O can result in severe accidents when leaking in a confined space. In this work, a novel powder-water mist synergistic strategy for decontaminating NH 3 ·H 2 O in a confined space is proposed. Initially, FeCl 3 /AlCl 3 was employed to modify diatomite, decorating its pore structure and augmenting the number of acidic adsorption sites. The modified diatomite achieves a notable efficiency of 74.6%, surpassing that of the raw diatomite (43.8%). Subsequently, surfactants were introduced to increase the contact area between the water mist and NH 3 , while a thickening agent was employed to suppress the fluidity of NH 3 ·H 2 O. Ultimately, the powder-water mist synergistic decontamination system was constructed by integrating the diatomite with a thickening agent and water mist containing surfactants. The synergistic system exhibits a superior decontamination efficiency of approximately 80%. This work generates fresh insight into decontaminating NH 3 ·H 2 O in a confined space and offers a crucial avenue for future advancements in decontamination technology.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 28
·期 22
·28732-28749
·
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
·
材料科学
✓ 已验证
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 5
·1008
·
IF 4.967
Huiyuan Zhang,Hongxing Zhang,Wenchao Zhu,Hailing Xi,Bomou Ma,Yong He
Strippable film is effective for removing radioactive contamination. However, it still has some limitations, such as the long curing time (about 30 min~24 h) and the requirement of organic solvents. To address these issues, we report a simple protocol to prepare strippable decontamination films using liquid polybutadiene (LPB) and tert-butyl acrylate (TBA) as the raw materials without solvent and using camphorquinone/ethyl 4-dimethylaminobenzoate (CQ/EDB) as a photoinitiator, where the film was formed under household LED panel light or daylight irradiation for about 540 s. After a thorough study of viscosity, real-time Fourier transform infrared (RT-FTIR spectra), gel and volatile organic compound (VOC) contents, mechanical properties and decontamination efficiency, the optimum composition and curing conditions were determined for the decontamination strippable film. VOC content is as low as 12.7 ± 0.7% and the resultant strippable film exhibits good mechanical performances with a tensile strength of up to 5.4 ± 0.4 MPa and elongation of up to 66.6 ± 13%. Most important, the decontamination efficiencies of this strippable film for133CsCl on glass, ceramic and metal surfaces reach up to 98.1%, 94.3% and 97.6%, respectively.Keywords:visible light curing;strippable film;radioactive decontamination
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
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xunhai Pan,Xiaoyan Lin,Lili Liang,Hailing Xi
Strippable film decontamination is critical for removing radioactive surface contamination during nuclear facility decommissioning and accident response. However, the conventional detergents perform poorly in film formation, freeze easily, and are hard to spray at low temperatures (below 0 °C). In this study, a novel ethyl cellulose-g-polyacrylate (EC-g-PA) detergent was successfully synthesized via benzoyl peroxide (BPO) initiated free-radical polymerization of ethyl cellulose (EC), methyl methacrylate (MMA), butyl acrylate (BA), ethyl methacrylate (EMA), and 2-ethylhexyl acrylate (2-EHA). The synthesized EC-g-PA was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). The film-forming and rheological properties of EC-g-PA detergents at low temperatures were systematically investigated and the mechanical properties of the EC-g-PA film were tested. Moreover, the decontamination efficiency of the EC-g-PA detergent on various plates within the temperature range from −10 °C to 25 °C was also investigated. The results demonstrate that the EC-g-PA detergent exhibits excellent low-temperature fluidity (below 0 °C) and colloidal stability. Notably, it demonstrates rapid film formation and complete peelability within 12 h under subzero conditions. The contamination decontamination rate (CDR) exceeds 90% on ceramic tiles (CT), glass (G), stainless steel (SS), and marble (M), while achieving 78.30% on concrete (C) at 0 °C. These results demonstrate that the EC-g-PA detergent shows significant potential for application in nuclear facility decommissioning and accident response at low temperatures.
研究领域:
核工程
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高分子科学
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表面化学
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环境修复
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 7
·3135-3145
·
IF 1.754
Zhang Hao,Xi Hailing,Lin Xiaoyan,Liang Lili,Li Zhanguo,Pan Xunhai,Luo Xuegang
Abstract Conventional water-based detergents cannot remove radioactive contamination on the surface below 0 °C. In order to solve this problem, a biodegradable antifreeze foam, containing the antifreeze, the chelating agent and the surfactant in the low pH complex system, has been developed with the small molecule lauryl alcohol (LA) as the foam stabilizer. The developed foam being with short decontamination time which is easy to use and collect, can significantly reduce the amount of radioactive waste. The foam has good stability and decontamination efficiency as low as − 10 °C. The stabilization mechanism of LA on foam was studied. At the range of from 0 to − 10 °C, the decontamination rates of simulated radioactive cesium (Cs) and strontium (Sr) pollution are all above 90% on surfaces with different roughness such as glass, stainless steel, ceramic tile, marble and paint. Graphic Abstract
研究领域:
环境科学
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核工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN NUCLEAR ENERGY
·
2023
·
IF 2.7
Wei Zhang,Hongwei Zhu,Zelin Gao,Gang Xu,Xiaotong Chen,Bing Liu,Yaping Tang
As one of potential treatments for irradiated graphite (i-graphite) waste, the oxidation method has been attracting more concern due to features of high treating efficiency and significant volume reduction. The release of fission products during oxidation is of great significance for further off-gas decontamination procedures. Focusing on the release behavior of volatile cesium (Cs), Cs-loaded graphite was prepared by impregnation in this work followed by definite distribution and chemical speciation analyzing. Results showed that the increasing temperature and humidity during the oxidation were evidenced to promote the release of Cs compounds, and the chemical speciation of released compounds was prominently dependent on oxidizing temperature. When the oxidation temperature was around 700 °C, Cs 2 O was predominately released with the morphology of spherical particles. When the oxidation temperature was increased to 900 °C, the predominant releasing composition turned to Cs 2 CO 3 with morphologies of both spherical particles and nanorod-like shapes. The different predominant releasing chemical compositions at different temperatures mainly resulted from the kinetics of graphite oxidization and temperature synergistically. These findings will provide theoretical foundations to the environmental evaluation of i-graphite thermal oxidation .
研究领域:
核科学与工程
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环境科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 18
·6394-6403
·
IF 4.099
Yanqin Li,Qi Gao,Lijuan Zhang,Yunshan Zhou,Yuxu Zhong,Ying Ying,Mingcai Zhang,Chunqian Huang,Yong'an Wang
Currently extensive effort is compulsively expended to decontaminate efficiently banned chemical war agents. In this work, H5PV2Mo10O40 molecules have been encapsulated in mesoporous MIL-101(Cr), which features two types of mesoporous cages (internal diameters of 29 Å and 34 Å) and microporous windows (diameters of 12 Å and 16 Å), leading to the formation of a new composite H5PV2Mo10O40@MIL-101(Cr) through a simple impregnation method. The composite was characterized thoroughly by elemental analysis, FT-IR spectroscopy, powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, TG/DTA, and textural analysis thereby confirming the encapsulation of the H5PV2Mo10O40 into MIL-101(Cr). The decontamination efficiency of sulfur mustard (4 μL HD in 40 μL of petroleum ether) by 20 mg of the composite is found to be 97.39% in 120 min under ambient conditions. GC-MS analysis on the decontaminated products using 2-chloroethyl ethyl sulfide (CEES), which has been widely used as a simulant of sulfur mustard, showed that MIL-101(Cr) just decontaminates CEES by adsorption, while CEES can be decontaminated under ambient conditions by a synergetic combination of adsorption of MIL-101(Cr) and subsequent chemical oxidation degradation to nontoxic 2-chloroethyl ethyl sulfoxide (CEESO) due to the presence of highly dispersed H5PV2Mo10O40 within the composites.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Chengke Fu,Yichao He,Chengyun Yang,Jieyu He,Luna Sun,Yixin Pan,Liping Deng,Rui Huang,Manli Li,Kaikai Chang
Selenium (Se) as an essential nutrient for human beings at trace concentrations, the allowable concentration for the human is only 40 μg/L. Iron sulfide (FeS) nanoparticles have been applied for excessive of selenium (Se) remediation in surface water and groundwater. In this study, FeS nanoparticles were anchored onto biochar (BC) to reduce agglomeration of FeS and prepared into the composite of FeS-BC by pyrolysis to economically and efficiently remove Se(IV) from simulated wastewater based on the excellent performance of FeS and the low cost of BC. Characterizations presented the uniform anchorage of FeS on the BC surface to prevent agglomeration. The results of batch experiments revealed that the removal of Se(IV) by FeS-BC nanomaterials significantly depended on the pH value, with the maximum removal of ∼174.96 mg/g at pH 3.0. A pseudo-second-order kinetic model well reflected the kinetic removal of Se(IV) in pure Se(IV) solution with different concentration, as well as the coexistence of K + , Ca 2+ , Cl - , and SO 4 2- ions. The presence of K + ions significantly inhibited the removal of Se(IV) with the increase of K + ion concentration compared with the effect of the other three ions. SEM-EDS and XPS analyses indicated that the removal process was achieved through adsorption by surface complexation, and reductive precipitation of Se(IV) into Se 0 with the electron donor of Fe(II) and S(-II) ions. The FeS-BC nanomaterial exhibited an excellent application prospect in the remediation of Se(IV).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Chuanyi Ma,Zhanguo Li,Yi Wang
Hydrogel is an effective surface radioactive decontamination technology. However, traditional colloid decontaminants face long curing duration and low decontamination rate issues. A peelable hydrogel coating composed of carrageenan, konjac glucan, and graphene oxide (GO) with excellent film-forming performance and decontamination efficiency was explored in this study. The results showed that the GO was effectively dispersed inside the hydrogel, improving the crosslink density and thermal stability of the hydrogel by forming hydrogen bonds with polysaccharide molecules. The GO can effectively enhance the decontamination performance of the hydrogel. For stainless steel, ceramic, glass, and rubber surfaces, the decontamination rates of the hydrogel for 30 min were 96.95 %, 87.6 %, 96.27 %, and 74.5 %, respectively. Furthermore, the decontamination effect was stable to temperature. For cement surfaces, the hydrogel could reach a maximum decontamination rate of 70.68 % after 24 h. The decontamination efficiency of hydrogel was affected by porosity, surface roughness, and GO addition. Moreover, the characterization results of XPS, FT-IR, and SEM/EDS showed that the decontamination process of the composite hydrogel may involve surface wetting, ion diffusion, electrostatic attraction, and physical entanglement. In conclusion, the as-prepared hydrogel has been demonstrated as a green, cost-effective surface decontaminant, which has great potential in the field of nuclear industry fields and environmental remediation.
研究领域:
环境科学
·
材料科学
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huiyuan Zhang,Tianhong Dong,Cancan Zheng,Hongxing Zhang,Wenchao Zhu,Hailing Xi,Yong He
Strippable films are extensively utilised for the decontamination of radioactive surfaces because of their cost-effectiveness, ease of operation, and minimal liquid waste. However, traditional strippable detergents are formulated for use at normal ambient temperatures and typically lose their efficacy at low temperatures because of poor performance or excessively long film-forming time. In this study, we have developed an anti-freezing and sprayable AMZW detergent based on acrylic acid (AA), acrylamide (AM), zirconyl chloride octahydrate (ZrOCl 2 ·8H 2 O), and water (H 2 O), which possesses a freezing point of approximately −34 ℃ due to the solvation interaction between Zr 4+ and H 2 O. Even at temperatures as low as −25 ℃, the AMZW detergent can be easily sprayed using a conventional apparatus and rapidly cured into a strippable hydrogel film under irradiation by 365 nm UV LED light (LED@365 nm), household LED panel light, or sunlight. The coordination bond formed between Zr 4+ and the carboxyl group of the polymer chain imparts excellent mechanical properties to the hydrogel while the carboxyl group can complex with uranyl nitrate hexahydrate (UO 2 (NO 3 ) 2 ·6H 2 O)—a radioactive simulant. As a result, the strippable hydrogel film demonstrates high tensile strength (6.1 ∼ 19.3 MPa), excellent flexibility (elongation of 90 ∼ 855 %), moderate peel strength (0.05 ∼ 3 N/cm, room temperature (RT)), and high decontamination efficiency (>91.6 % on stainless steel and glass; >81.3 % on concrete) over a wide range of temperatures (−25 ∼ 25 ℃). This work presents a novel approach for producing anti-freezing, fast-forming, flexible, and high-strength strippable hydrogel films for surface radioactive decontamination at low temperatures.
研究领域:
材料科学
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环境科学
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 61
·期 11
·1015-1025
·
IF 3.046
Xiaoju Zhu,Neng Hu,Zheng Xu,Xin Cai,Peter Müller-Buschbaum,Qi Zhong
An easy care of silk fabrics is realized by crosslinking a thermo-responsive copolymer film onto its surface. The thermo-responsive copolymer poly( N -isopropylacrylamide- co -oligo[ethylene glycol] methyl ether methacrylate- co -ethylene glycol methacrylate), abbreviated as P(NM- co -OA 300 - co -EA 360 ), is synthesized by sequential atom transfer radical polymerization. By applying 1,2,3,4-butanetetracarboxylic acid as crosslinker, the thermo-responsive P(NM- co -OA 300 - co -EA 360 ) film can be immobilized onto the silk fabrics. The transition temperature (TT) of the P(NM- co -OA 300 - co -EA 360 ) film crosslinked on silk fabrics is around 46 °C. The reversible transition behavior can effectively reduce the attachment between lipophilic stains and P(NM- co -OA 300 - co -EA 360 ) film, inducing a high efficiency of stain removal. Simply rinsing with deionized water at 25 °C (below its TT) for 30 s, 60% of stains can be removed. Moreover, the crosslinked P(NM- co -OA 300 - co -EA 360 ) film turns hydrophobic during outdoor activities or drying. Thus, the repelled water molecules can be easily evaporated from the silk fabrics and the drying process is 25% faster than that without crosslinked P(NM- co -OA 300 - co -EA 360 ) film. Based on the excellent performance of stain removal and quick drying, the silk fabrics crosslinked with thermo-responsive copolymer film can be broadly used to design silk-based costumes for daily use. Graphical
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 15
·7278-7287
·
IF 3.3
Jie Zhang,Xuemeng Tian,Chaochao Dong,Ruixia Gao,Yuan Hu
There is a growing awareness of practices focused on the in-depth treatment and decontamination processes of firefighters’ personal protective equipment to decrease health risks. Hence, TiO2-nanoparticle-modified Cu-doped BiOBr microflowers (BiOBr–Cu2+/TiO2) have been devised and used as effective constituents to construct a type of decontamination agent that can efficiently and deeply eliminate hazardous chemicals. The 3D microflowers can be admirable carriers for the prevention of aggregation and outstanding adsorption, and the construction of a heterojunction based on the copper-doping strategy and sequential harvesting of light strategy provides enhanced light absorbance and efficient charge separation. The proposed materials have a nanoparticle-interspersed microflower morphology, enhanced light-harvesting ability, and excellent transfer of photogenerated carriers, leading to more effective adsorption and solar-light-driven photocatalytic activity than other catalysts. Moreover, the BiOBr–Cu2+/TiO2 composites mixed with different solvents can be used as decontamination agents for the in-depth treatment of hazardous chemicals under different situations. It is believed that employing heterojunctions as the constituents of decontamination agents has promise to become an effective and feasible method for deep decontamination processes in firefighting work.
研究领域:
材料科学
·
环境科学
·
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）