MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Chao Xiong,Shixing Wang,Wentong Sun,Ying Li
Lead-containing wastewater comes mainly from batteries , petroleum refining, dyes, lead mine drainage and so on. Here, the nanosilica functionalized with diethanolamine (DPM-SNPs) was utilized as an adsorbent to remove lead ions from aqueous solution. TEM, SEM, XPS, FT-IR, Zeta potential and BET analyzer have been employed to characterize DPM-SNPs. The adsorption property of DPM-SNPs was studied by varying pH, reaction time, Pb(II) concentration and temperature. The selectivity, reusability and adsorption mechanism have been systematically studied. DPM-SNPs has a shorter adsorption equilibrium time (60 min) as well as a high efficiency for lead ions removal (154.38 mg/g) at 298 K. The optimized pH was 5.8, mainly due to electrostatic and chelation interactions between hydroxyl/amino groups and metal ions . DPM-SNPs showed better selectivity for Pb(II) again various interfering ions and the removal efficiency just decreased about 4% after five repeated circles. Besides, the adsorption behavior fit well to Pseudo-second-order kinetic, Langmuir and Dubinin-Radushkevich models, indicating that the chemical reaction is the rate-limiting step and the adsorption process belongs to monolayer adsorption. Thermodynamic studies revealed that the adsorption process was spontaneous, feasible and endothermic. Thus, the nanosilica functionalized with diethanolamine is a potentially effective and sustainable adsorbent for application in lead removal from 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
JOURNAL OF CHEMICAL THERMODYNAMICS
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2018
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IF 2.631
Jun Wang,Deyan Wang,Chunxiang Huang,Xueni Sun,Xiaoyong Yue,Hui Shao,Yixin Leng
Isobaric vapour–liquid equilibrium (VLE) data for two binary systems of p-Cresol (PC) + diethanolamine (DEA) and m-Cresol (MC) + DEA were measured at 20.0 kPa. The Herington area method was used to check the binary VLE data, and the results showed good thermodynamic consistency. Meanwhile, the Wilson, NRTL, UNIQUAC models and the chemistry theory proposed by Dolezalek were used to correlate the VLE data. The binary energy interaction parameters for activity models, and reaction equilibrium constants for chemistry theory were obtained. With help of the parameters obtained in this work, the NRTL model was used to predict the VLE data of the two binary systems at the pressure of 8.33 kPa. The predictive results were compared with the literature’s data. At same time, the excess Gibbs free energy for the two binary systems, and infinite dilution activity coefficients for MC and PC in DEA were estimated. The calculated results showed that the DEA had slightly stronger interaction with PC than MC.
研究领域:
化学工程
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热力学
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DOI
高影响因子
POLYMER COMPOSITES
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2018
·Vol. 40
·期 3
·1061-1067
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IF 1.943
Li-Xin Lu,Zhe Wan,Wan-Qiu Lu,Liao Pan,Changfeng Ge
The effect of glutaraldehyde on the properties of polyvinyl alcohol/diethanolamine permselective film was investigated. A new permselective film was prepared by coating low-density polyethylene containing diatomaceous earth. In the coating solution, diethanolamine, glutaraldehyde, and polyvinyl alcohol were used as an amine carrier, a crosslinking agent and a substrate respectively. The effects of the amount of glutaraldehyde on the tensile properties, moisture permeability, thermal stability and the morphologies of permselective film were characterized. The influence of relative humidity on the permeability of permselective film was investigated. The results show that with the increasing amount of glutaraldehyde, the permeability coefficient of CO 2 /O 2 , tensile strength, and thermal stability increase gradually. However, water vapor permeability coefficient and elongation at break of permselective film decrease with the content of glutaraldehyde on the rise. When the content of glutaraldehyde is 0.7%, the selectivity coefficient of CO 2 /O 2 is up to 9.23, and the tensile properties and moisture resistance are also in the high level. Based on the results obtained, it can be concluded that the crosslinked permselective film prepared in this study has good comprehensive properties, and the relative humidity has little influence on the permselective film. POLYM. COMPOS., 40:1061–1067, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Daofan Ma,Chunying Zhu,Taotao Fu,Xigang Yuan,Youguang Ma
The experimental values of density and viscosity for binary solutions diethylenetriamine (DETA) + H2O, DETA + N,N-diethylethanolamine (DEEA), and ternary solution DETA + DEEA + H2O over the entire concentration range were reported at atmospheric pressure and T = (293.15, 303.15, 313.15, 323.15, 333.15) K. The measured densities and viscosities were used to calculate the thermal expansion coefficient, excess molar volume, partial molar volume, apparent molar volume, partial molar volume at infinite dilution, viscosity deviation, and excess Gibbs free energy of activation for viscous flow. The molecular interactions in mixtures were discussed based on the volumetric and viscometric properties.
研究领域:
物理化学
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分子科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Mengxiang Fang,Ying Xie,Yan Shao,Xiaoming Xu,Yang Xia,Man Mou,Ximing Hu,Tao Wang,Zihao Liu
The steel industry generates 7–9 % of the world’s anthropogenic carbon emissions. Carbon capture, utilization, and storage (CCUS) technologies for low carbon emissions from the steel industry have attracted research attention. Chemical absorption is the most mature and widely used carbon capture method, and reducing the energy consumption of this technology is currently a research hotspot. This work focused on the development of amine blends suitable for carbon capture in a top gas recycling-oxygen blast furnace (TGR-OBF) for low-carbon steelmaking and further reduction of carbon emissions. The effects of piperazine (PZ) and its derivatives on methyldiethanolamine (MDEA) activation were explored. PZ and 2-(piperazin-1-yl)ethanamine (AEP) most significantly activated MDEA. The best absorption and regeneration performance was achieved with aqueous amine solutions at the MDEA:PZ and MDEA:AEP ratios of 5:3 and 1:1, respectively. Blast furnace gas is rich in CO, and we verified that CO does not significantly affect the overall performance of the aqueous amine solution. The maximum absorption rate of the developed MAA absorbent was similar to that of 30 wt% monoethanolamine (MEA), and at 20 % and 35 % CO 2 , the cyclic capacities were 1.57 and 1.47 times greater than that of 30 wt% MEA, while the maximum regeneration rates were 2.13 and 1.92 times greater than those of 30 wt% MEA, respectively. A bench-scale CO 2 capture experiment performed at a flow rate of 4 Nm 3 /h verified the scale-up application potential of the absorbent. The regeneration energy of MAA under the optimal operating conditions was 2.86 GJ/ton CO 2 , which was 28.5 % lower than that of 30 wt% MEA. Moreover, MAA displayed a lower latent heat and lower reaction heat. The developed MAA absorbent has great adaptability and low regeneration energy and is expected to be applied in the steel industry to effectively reduce blast furnace carbon emissions.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
FUEL
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2018
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IF 4.908
Jingai Shao,Junjie Zhang,Xiong Zhang,Ye Feng,Han Zhang,Shihong Zhang,Hanping Chen
To enhance the SO 2 adsorption of biochar, CO 2 activation and impregnation with methyldiethanolamine (MDEA) was simultaneously employed to improve its physicochemical characteristics. Furthermore, the effects of the pore structure and nitrogen functionality on SO 2 adsorption were also explored. The results show that after CO 2 activation, the specific surface area of biochar increased from 56.91 m 2 /g to 755.35 m 2 /g, while this figure dropped to 25.54 m 2 /g or even lower after impregnation with MDEA. Although the pore structure of activated biochar was destroyed, the surface nitrogen content of the nitrogen-enriched biochar (with 10% MDEA impregnation) increased from 1.46% to its highest level (7.20%); moreover, as indicated by Fourier Transform Infrared (FTIR) spectroscopy, the nitrogen functional groups introduced on the surface of the nitrogen-enriched biochar were mainly C-N. After 10% MDEA impregnation, the maximum SO 2 adsorption capacity increased from 57.8 mg/g to 156.2 mg/g. Changes to physical and chemical properties in the nitrogen-enriched biochar indicate that the nitrogen functional groups on the surface are more important than the pore structure for SO 2 adsorption at 393 K, and that the dominant nitrogen species are quaternary nitrogen.
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
MOLECULES
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2023
·Vol. 29
·期 1
·66
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IF 4.6
Meng Zhang,Xue Zhuang,Siqi Li,Yansong Wang,Xiangyu Zhang,Jinlian Li,Dongmei Wu
Binary ethosome vesicles have been developed as flexible lipid vesicles for the enhanced physicochemical stability and skin delivery of drugs. This work aimed to prepare phloretin-loaded propylene glycol ethosomes (PHL-PGEs) to improve their stability, skin permeability and antioxidant activity. PHL-PGEs were prepared via the ethanol injection method and optimized using different weight ratios of ethanol to propylene glycol (PG). When the ethanol/PG mass ratio changed from 10:0 to 0:10, the encapsulation efficiency and stability of ethosomes increased. At a PHL concentration of 1mg/mL, the EE% was 89.42 ± 2.42 and the DL% was 4.21 ± 0.04, which exhibited their highest values. The encapsulation of the PHL in the PHL-PGEs was strengthened via XRD analysis and FTIR analysis. The results of the in vitro percutaneous permeability test demonstrated that the combined use of ethanol and PG exhibited a notable enhancement in skin permeability, and the skin retention of PHL-PGEs was 1.06 times that of PHL-ethosomes (PHL-Es) and 2.24 times that of the PHL solution. An in vitro antioxidant activity study indicated that solubility and antioxidant activity was potentiated via the nanoencapsulation of phloretin. Therefore, these results confirm the potential of this nanocarrier to enhance physicochemical stability, skin permeability and antioxidant activity.Keywords:binary ethosomes;propylene glycol;skin permeability;antioxidant activity
研究领域:
药剂学
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皮肤科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2018
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IF 6.042
Jian Sun,Jiahui Zhao,Xingfu Bao,Qifeng Wang,Xiurong Yang
Diethanolamine (DEA) has been extensively utilized as an alkaline buffer in current assays of alkaline phosphatase (ALP) activity in the past decades. While playing the role of a buffer, the chemical reactivity of DEA has been widely ignored in such assays. Herein, we report an interesting chromogenic interaction between DEA and 4-aminophenol (AP) in the presence of H2O for the first time, which inspires us to develop a novel DEA-participated ALP activity assay by using 4-aminophenyl phosphate (APP) as a substrate. This APP/DEA-based colorimetric approach has been proved to be comparable and even superior to the conventional p-nitrophenyl phosphate (pNPP)-based one, especially in the low ALP activity region, due to its higher sensitivity. The clear response mechanism and excellent sensing performance ensure that it can be further applied to determining ALP activity in real biological samples, screening potential ALP inhibitors in vitro, establishing ALP-enabled ELISA, and even fluorophore-assisted fluorescent ALP activity assay. It is demonstrated that this strategy not only possesses a good feasibility, but also exhibits a promising outlook for a series of ALP-related and -extended detections.
研究领域:
生物化学
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医学检测
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酶学研究
✓ 已验证
DOI
PubMed
高影响因子
DESALINATION
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2025
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IF 9.8
Bingzhi Yi,Lulu Liu,Huibiao He,Sanchuan Yu,Doufeng Wu,Congjie Gao
In response to the critical challenge of managing dye wastewater in the textile industry, this research presents an economically viable modification approach to enhance the dye/salt separation efficacy and operational stability of polyamide (PA) based nanofiltration membranes. By incorporating diethanolamine (DEA) as piperazine-aqueous phase additive and polyquaternium-10 (PQ-10) as surface modifier, this technique significantly optimized the properties of loose nanofiltration membranes. Structural modifications resulted in a significant reduction in surface zeta potential at pH 7.0, from −28.9 mV to −2.0 mV, expanded the molecular weight cut-off (MWCO) and most probable pore radius from 360 to 2340 Da and 0.28 to 0.64 nm, respectively. These changes led to high water permeability of 420.4 L·m −2 ·h −1 ·MPa −1 and much low sodium sulfate (Na 2 SO 4 ) rejection of 10.3 %, while maintaining a 98.9 % rejection for dye Congo red (CR). Long-term operational tests demonstrated stable rejection of approximately 98 % for CR and 11 % for Na 2 SO 4 over 50.0 h, affirming the high separation efficiency and good durability of membranes. This enhancement in dye/Na 2 SO 4 separation not only optimizes the balance between permeability and selectivity but also shows significant potential for scaling to industrial applications. The findings provide a robust strategy for addressing critical demands in wastewater treatment within the industry.
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 and Processing-Process Intensification
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2024
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IF 3.8
Lingyu Xiao,Zhoujie Qiu,Shuo Feng,Xiaoxu Duan,Zhisheng Zhao,Yongcong Liu,Liang Ma
The global climate change problem has brought much attention to CO 2 capture technology. N-methyldiethanolamine (MDEA), as an efficient and environmentally friendly absorbent, is widely used in CO 2 capture. However, it is difficult for a single MDEA to meet the demand for efficient absorption and desorption under certain conditions, so the addition of promoters to improve its performance has become a hot research topic. The aim of this study is to deeply investigate the effects of different accelerators on the absorption and desorption of CO 2 by MDEA. Experiments were conducted to measure the absorption capacity of the MDEA compound solution for CO 2 in a bubbling reactor at 30°C and to evaluate its desorption effect in a desorption system at 90°C. The experimental results showed that increasing the promoter concentration in the MDEA-based absorbent solution significantly enhanced the absorption capacity and circulation capacity. However, in terms of desorption efficiency, the added concentrations of MEA and DEA were negatively correlated with the desorption efficiency. Notably, the addition of 0.1 mol/L DEA significantly enhanced the desorption efficiency by 16% compared with MDEA.
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
Journal of Cleaner Production
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2022
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IF 11.072
Liang Ma,Xiaoxu Duan,Jiwei Wu,Jianping Li,Lv Peng,Liwang Wang,Lingyu Xiao
Boiler flue gas in the chemical industry contains SO 2 and nitrogen oxides (NO x ). These flue gases not only pollute the environment, but also seriously endanger human health. In this work, we studied the process of jet atomization and swirl enhancement. Then we constructed a miniaturized hydrojet cyclone. After that, we proposed a new type of flue gas purification technology to achieve integrated and efficient desulfurization and denitrification. All studies were based on combining the liquid jet field with the three-dimensional swirl field to increase the mass transfer area of the gas and liquid phases. The industrial sideline test results showed that the gas purification efficiency increased with the increase of inlet velocity and absorption liquid flow rate, Efficiency is always above 80%. Increasing the concentration of activator could significantly improve the desulfurization efficiency by 27%. Increasing the concentration of oxidant was beneficial to denitrification, and the maximum denitrification efficiency of methyldiethanolamine (MDEA) was 98.2%. Overall, this technology can not only help enterprises save maintenance and treatment costs, but also protect the environment by avoiding the harm caused by flue gas pollution.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ying Xie,Zhixiang Xia,Chao Li,Man Mou,Ximing Hu,Wei Chen,Xiaoming Xu,Yang Xia,Zihao Liu,Mengxiang Fang
The steel industry contributes approximately 7–9 % of global anthropogenic CO 2 emissions. Chemical absorption is a promising strategy for reducing steel industry carbon emissions. MAA, a novel amine blend primarily composed of methyldiethanolamine (MDEA) and 2-(Piperazin-1-yl) ethanamine (AEP), exhibits potential but lacks industrial-scale validation. Focusing on the blast furnace (BF)-basic oxygen furnace steelmaking process, this study conducted pilot tests with MAA and 30 wt% MEA for BF gas (20 vol% CO 2 ) and top gas recycling-oxygen blast furnace (TGR-OBF) gas (35 vol% CO 2 ) and studied process modifications. The results showed that after 200 h of stable operation, MAA achieved optimal CO 2 capture from BF gas at a liquid-to-gas ratio of 8 L/Nm 3 , with a regeneration energy of 2.47 GJ/t CO 2 , compared to 3.78 GJ/t CO 2 for 30 wt% MEA. MAA achieved a regeneration energy of 1.81 GJ/t CO 2 for TGR-OBF gas, 26.72 % lower than that for BF gas. Absorber intercooling reduced regeneration energy by 8.86 %. Among the process modifications, directing 10 % of the rich solution to a flash evaporator for semi-lean solution recycling back to the middle of the absorber, with the remaining 90 % undergoing thermal regeneration in the stripper, demonstrated the lowest regeneration energy for TGR-OBF. This modification reduced MAA regeneration energy by 5.52 %. Additionally, two-stage water scrubbing effectively controlled amine emissions from the 10 Nm 3 /h pilot plant, reducing MAA emissions to 17.83 mg/Nm 3 after the second stage. MAA exhibited excellent adaptability to BF and TGR-OBF gases, achieving 90 % CO 2 removal efficiency with a minimum regeneration energy of 1.71 GJ/t CO 2 . The findings highlight the potential for the large-scale application of MAA in the steel industry to significantly reduce CO 2 emissions.
研究领域:
钢铁工业
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环境工程
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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）