JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 321
·期 2
·671-681
·
IF 1.186
Xiu Taoyuan,Liu Zhirong,Yang Lingfang,Wang Yun
The hydrated manganese dioxide (HMO) was synthesized by hydrothermal process using MnSO 4 and KMnO 4 . The adsorption of HMO for Th(IV) and U(VI) were investigated by batch static adsorption experiments. The HMO and MnO 2 were characterized by FT-IR, XRD and SEM. At the same time, the adsorption mechanism is discussed. The adsorption process was in line with the pseudo-second-order kinetic model and Langmuir isothermal model. The maximum adsorption capacities were Th ( T = 308 K, C 0 = 200 mg L −1 , q max = 218.34 mg g −1 ) and U ( T = 308 K, C 0 = 200 mg L −1 , q max = 55.19 mg g −1 ).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 15
·11475-11484
·
IF 3.84
Yuanqing Huang,Chunping Yang,Zhichao Sun,Guangming Zeng,Huijun He
Cadmium (Cd2+) and lead (Pb2+) posed severe health risks worldwide. To remove these contaminants from aqueous solution, a nitrilotriacetic acid anhydride (NTAA) modified ligno-cellulosic material (NTAA-LCM) was prepared and characterized. Batch sorption experiments were performed to evaluate the influences of various factors such as contact time, pH, ionic strength, temperature and initial metal concentration on the sorption of metals. Results from elemental analysis and FTIR suggested that ester bonds and amine groups were successfully introduced into NTAA-LCM. Fast adsorption rates were observed, and the maximum sorption capacities of NTAA-LCM for Cd2+ and Pb2+ reached 143.4 and 303.5 mg g−1 at 298 K, respectively. Both the pseudo-second-order model and the Langmuir model described the adsorption extremely well. Thermodynamic analysis showed that the sorption was endothermic but spontaneous. The sorption was a chemical process involving surface chelation and ion exchange; this was reflected in the metal/NTA ratio. Additionally, NTAA-LCM retained high metal sorption capacity after seven cycles of regeneration by HNO3.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Mengting Wang,Han Ye,Xiongkai Zheng,Siyuan Chen,Huanhuan Xing,Xueqin Tao,Zhi Dang,Guining Lu
Cadmium (Cd 2+ ) and fluoride (F - ) are frequently detected simultaneously in wastewater. Simultaneous removal of Cd 2+ and F - in wastewater is urgent. In this study, bovine bone meal (BBM), mainly consisted of hydroxyapatite , was used as a green adsorbent for Cd 2+ and F - adsorption in single and binary solutions. The results showed that with the increase of pH, the uptake ability of BBM towards Cd 2+ and F - showed an upward and downward trend, respectively, suggesting that electrostatic interaction was an important mechanism. Cl - and NO 3 - had little effect on Cd 2+ and F - adsorption, while H 2 PO 4 - enhanced adsorption capacities. The kinetic data of Cd 2+ and F - removal were successfully described by pseudo-second order model. The maximum adsorption capacity (q m ) of Cd 2+ obtained from the Langmuir model was 78.969 mg/g. The adsorption isotherm of F - was consistent with S-type and satisfied with the Brunauer, Emmett, and Teller (BET) model. In the binary system, F - slightly decreased the adsorption capacity of BBM on Cd 2+ , while Cd 2+ increased the adsorption capacity of BBM on high-concentration F - from 38.724 to 86.966 mg/g. This study provides a cost-effective and environmentally friendly method for separate and simultaneous removals of Cd 2+ and F - from water, which provides a practicable way for the treatment of cadmium-fluorine wastewater and resource utilization of bovine bone.
研究领域:
环境科学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Chunying Zhu,Xiaofen Ren,Youguang Ma
Densities (ρ) and viscosities (η) of aqueous xylitol solutions with glycine, l-alanine, l-valine, l-threonine, or l-arginine were measured at T = (293.15 to 323.15) K under atmospheric pressure. The density values were utilized to further calculate the apparent molar volume (Vφ), the limiting partial molar volumes of amino acids (Vφ0), the limiting partial molar volumes of transfer (ΔtrVφ0) and the interaction coefficients Vab, Vabb, Vabbb. The viscosity data were used to obtain viscosity B-coefficient, the free energies of activation per mole of solvent (Δμ10≠) and solute (Δμ20≠). The limiting partial molar volumes of transfer and the free energies of activation per mole of both solvent (Δμ10≠) and solute (Δμ20≠) were analyzed based on the cosphere overlap model and transition state theory, respectively. The hydration number of amino acid was determined using the obtained limiting partial molar volume and viscosity B-coefficient.
研究领域:
生物化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 8
·1735
·
IF 3.426
Ke Li,Huiyu Yang,Lang Jiang,Xin Liu,Peng Lang,Bo Deng,Na Li,Weilin Xu
Dissolving cellulose in water-based green solvent systems is highly desired for further industrial applications. The green solvent glycerin—which contains hydrogen-bonding acceptors—was used together with NaOH and water to dissolve cellulose. This mixed aqueous solution of NaOH and glycerin was employed as the new green solvent system for three celluloses with different degree of polymerization. FTIR (Fourier-transform infrared), XRD (X-ray diffractometer) and TGA (thermogravimetric analysis) were used to characterize the difference between cellulose before and after regenerated by HCl. A UbbeloHde viscometer was used to measure the molecule weight of three different kinds of cellulose with the polymerization degree of 550, 600 and 1120. This solvent system is useful to dissolve cellulose with averaged molecule weight up to 2.08 × 105g/mol.Keywords:cellulose;glycerin;dissolution;green solvent;aqueous solution
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2019
·
IF 4.197
Xiangxiang Qin,Xia Xu,Jing Lu,Yinggui Zhu
This paper reports for the first time the strong cathodic electrochemiluminescence (ECL) behavior of quinoline, isoquinoline and their derivatives in aqueous solution with K 2 S 2 O 8 as coreactant. The effects of K 2 S 2 O 8 concentration, pH and scan rate on the ECL intensity have been studied in detail. Calculations of the HOMO-LUMO energy gap for the ECL reaction indicated that isoquinoline is more likely to produce an excited state radical ion than quinoline. The effects of different functional groups on the ECL of isoquinoline were then compared and a possible ECL reaction mechanism was discussed. This work provides a simple and sensitive ECL method for the detection of quinoline and isoquinoline, which are important drug intermediates.
研究领域:
分析化学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2012
·
IF 1.693
Yuan-Yuan Che,Jian Shen,Jun-Chao Zhou,Chao-Hong He
The thermal conductivity of ammonium sulfate + water, ammonium nitrate + water, and ammonium sulfate + ammonium nitrate + water is of great significance in the national defense industry and military engineering for manufacturing of various energetic chemicals. The measurements, covering a temperature range from (278.15 to 333.15) K, have been performed by a transient hot-wire technique over a wide range of concentrations. The densities of ternary aqueous solutions of ammonium sulfate + ammonium nitrate are also presented at the same temperature covering different portions of ammonium sulfate and ammonium nitrate. The thermal conductivities of binary aqueous solutions of ammonium salts are correlated by polynomial functions in terms of temperature and weight fraction for the purpose of interpolation. The Aseyev equation in terms of weight fraction is also used to represent the thermal conductivities of ternary mixtures of these compounds. The ideal mixing rule of Young has been successfully applied to correlate the ternary densities of aqueous ammonium sulfate + ammonium nitrate solutions based on relevant binary solution properties. The agreement between the correlation and the experimental data is pretty good.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2016
·Vol. 310
·期 2
·547-557
·
IF 0.983
Zhang Zhi-bin,Qiu Yan-fang,Dai Ying,Wang Pan-feng,Gao Bao,Dong Zhi-ming,Cao Xiao-hong,Liu Yun-hai,Le Zhang-gao
In this article, we report a facile one-pot method to prepare sulfonated graphene oxide (GOS) via vapor–solid transfer reaction of graphene oxide (GO). The synthesized GOS were characterized and investigated as an adsorbent for the adsorption of U(VI) from aqueous solutions. The results indicated that the adsorption of U(VI) was strongly dependent on pH and independent of ionic strength. The adsorption process followed the pseudo-second-order kinetics and the adsorption isotherm agreed well with the Langmuir model, having a maximum adsorption capacity of 309.09 mg g −1 . Thermodynamic parameters indicated that the adsorption reaction was an endothermic and spontaneous process.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2013
·
IF 3.532
Yiqun Tan,Jiancan Yu,Junkuo Gao,Yuanjing Cui,Yu Yang,Guodong Qian
A new fluorescent and colorimetric probe based on the reaction and intramolecular charge transfer (ICT) effect is designed and synthesized. The probe responds rapidly toward hydrazine and exhibits distinct color changes from yellow to colorless, indicating its use as a color indicator for hydrazine. Moreover, the probe also shows a significant broad band fluorescence (410–700 nm) enhancement by ∼120-fold after the addition of hydrazine. With a detection limit as low as 0.11 ppb, the probe can detect hydrazine in a wide concentration range because of the blunted sensing functional group. The contrast test shows almost no interruption from common elements in water, suggesting the high selectivity of this probe toward hydrazine. The theoretical calculation based on density functional theory (DFT) is also performed and two different ICT modes are found. This hydrazine probe would be a promising candidate applicable in environment protection, water treatment and safety inspection.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2013
·Vol. 298
·期 3
·1999-2008
·
IF 1.467
Pan Ning,Guan Debin,He Ting,Wang Ruibing,Wyman Ian,Jin Yongdong,Xia Chuanqin
The removal of Th 4+ ions from aqueous solutions was investigated using single-layer graphene oxide (GO) as a sorbent which was prepared by the modified Hummers’ method through batch adsorption experiments at room temperature. Structural characterizations of the sorbent were also investigated. The influences of the pH value of solution, contact time, sorbent dose, ionic strength, the initial metal ion concentration and temperature on the adsorption of Th 4+ were also investigated. These results indicated that the adsorption of Th 4+ was dependent on the pH and independent on the ionic strength. The sorbent provided significant Th 4+ removal (>98.7 %) at pH 3.0 and the adsorption equilibrium was achieved after only 10 min. The Langmuir adsorption isotherm fit the absorption profile very closely, and indicated that a maximum adsorption capacity of 1.77 mmol g −1 of GO (411 mg g −1 ) after 2 h. The thermodynamic parameters showed that this adsorption process was endothermic and spontaneous. Moreover, the desorption level of Th 4+ from GO, by using 0.1 mol L −1 H 2 SO 4 as a stripping agent, was 84.2 ± 1.2 %, and that of 0.5 mol L −1 HNO 3 as a stripping agent, was 79.8 ± 3.0 %.
研究领域:
环境科学
·
材料科学
·
核化学
·
水处理技术
·
吸附科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Kai Zhou,Yuzhou Zhu,Jianhua Zhou,Fengxiang Zhang,Haihui Jiang,Libin Liu,Ligang Gai
Electrolyte is the determining factor for whether electrochemical energy-storage systems using aqueous electrolytes can operate in all-temperature environments. In this contribution, we present a type of H 3 PO 4 –ethylene glycol–H 2 O proton conducting electrolyte that enables aqueous electrochemical capacitors to operate within a temperature range of −60 to 140 °C, representing the widest operating temperature window of aqueous electrolytes to date. The physicochemical properties of the electrolytes are characterized. Using the designed electrolytes, the electrochemical properties of symmetric electrochemical capacitors based on GaN and graphite electrodes are evaluated at full temperature (−60–140 °C), respectively. The volume ratio of ethylene glycol to water is optimized, and the conduction mechanism of protons is discussed. Compared with the base electrolyte (52 wt% H 3 PO 4 aqueous solution), the addition of ethylene glycol improves the freezing resistance, electrothermal stability, and wettability of the electrolyte, thereby reducing the equivalent series resistance and improving the electrode kinetics and rate performance of the electrochemical capacitors. The improvement of electrochemical performance of electrochemical capacitors by the designed electrolytes is verified through theoretical calculations.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xia Wei,Bing Fang,Tianyao Wang,Hongbin Dai,Song Li
Understanding the metal-support interaction between Rh-B and CeO 2 is essential for enhancing the efficiency of hydrogen generation from hydrous hydrazine. In this study, a series of Rh-B/CeO 2 catalysts were synthesized via a facile wet-chemical reduction method. The Rh-B/(CeO 2 ) 0.7 catalyst exhibits a remarkable 12-fold increase in turnover frequency (TOF) compared to pristine Rh-B catalyst. The strong electronic coupling between Rh-B and CeO 2 was identified as the primary factor driving this significant performance enhancement. This interaction facilitates the formation of oxygen vacancies, promoting hydrazine adsorption and subsequent cleavage of the N-H bond in N 2 H 4 * to form N 2 H 3 *. Our findings emphasize the pivotal role of support engineering in catalyst design for optimizing catalytic performance.
研究领域:
催化化学
·
材料科学
✓ 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）