JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
·
IF 3.119
Ziyu Zhuang,Dongdong Li,Jinshun Lei,Dandan Gao,Dewen Zeng
Highly concentrated boron is widespread in salt lake brine and nuclear wastewater. Treatment of these aqueous solutions involves the solubility of extensive boron-containing minerals. Recently, we concentrated on the temperature-dependent solubility of the H3BO3 + salt + water system. Here, we systematically determined the ternary solubility isotherms in the H3BO3 + RbCl + H2O and H3BO3 + NH4Cl + H2O systems at T = (273.15, 298.15, 323.15, 348.15 and 363.15) K, using an isothermal equilibrium method. The results showed that both ternary systems belonged to a simple eutectic case. The solubility isotherms consisted of the solubility branches of H3BO3(cr) and RbCl(cr) or NH4Cl(cr). Using a revised Pitzer–Simonson–Clegg (rPSC) model implemented in the ISLEC software, these ternary solubility data were represented by fitting the interaction parameters between H3BO3 and RbCl and H3BO3 and NH4Cl. With the help of these models, polythermal phase diagrams of the two ternary systems are predicted.
研究领域:
化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Yueheng Wang,Ziyu Zhuang,Yanfei Fan,Dandan Gao,Dongdong Li
Ammonium ion is of the same charge as alkali ions and with similar ionic radius as potassium, rubidium, and cesium ions. Solid solutions are very common between ammonium and alkali salts, which is of great interest for understanding the geology, soil, and environment fate of these elements. In this study, the solid–aqueous equilibrium in the NH4Cl + RbCl + H2O and NH4Cl + CsCl + H2O systems was determined at 298.15 K. For each system, two incontinuous solid solutions, i.e. (NH4,Rb)Cl(α) and (Rb,NH4)Cl(β), or (Cs,NH4)Cl(α) and (NH4,Cs)Cl(β), presented, and their composition and structure were studied using Schreinemakers’ wet residues analysis, XRD, and Raman characterization. The equilibrium between these solid solutions and aqueous solutions were well modeled using an integrated solution equilibrium calculator program, in which a Pitzer-Simonson-Clegg model and a subregular model were implemented for describing the nonideality of aqueous phase and solid solution. According to the experimental and thermodynamic modeling results, NH4Cl can dissolve RbCl and CsCl in the solid state (NH4,Rb)Cl(α) or (NH4,Cs)Cl(β) with limited solid solubilities of 0.18 or 0.051 in mole fraction, respectively. RbCl or CsCl can also dissolve NH4Cl in the solid state (Rb,NH4)Cl(β) or (Cs,NH4)Cl(α) with limited solid solubilities of 0.37 and 0.095 in mole fraction, respectively.
研究领域:
化学
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环境科学
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地质学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wan-Jing Yu,Yi Li,Bochuan Deng,Jing Wang,Gaoqiang Mao,Hui Tong,Hanbing He,Xueyi Guo
The recovery of lithium from spent lithium-ion batteries (LIBs) is an important approach to solve the global shortage of lithium resource. Considering the difference in stability of various metal element chlorides in Ni-Co-Mn ternary (NCM) cathode materials, lithium element was selectively and high-efficiently extracted from spent ternary NCM cathode material by ammonium chloride roasting in oxygen atmosphere followed by water leaching. The effects of roasting temperature, roasting time, and NH 4 Cl dosage on lithium leaching efficiency and selectivity were systematically investigated. In addition, the conversion mechanism during chloride roasting was discussed in detail in conjunction with thermodynamic analysis as well as structural and compositional characterizations. After roasting with NH 4 Cl in oxygen atmosphere at 600°C, the spent NCM cathode material was thoroughly decomposed and converted into mixture of LiCl, NiO, and MnCo 2 O 4 . Due to the high aqueous solubility of LiCl, more than 95 % of the lithium in the mixture was leached in ∼30 minutes at room temperature, and Li 2 CO 3 with a purity of 99.40 % can be obtained in the subsequent recovery process. This simple and efficient method can be generally useful for the recovery of a wide range of spent cathode materials and provide inspiration for the lithium recovery process of spent LIBs.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
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IF 3.9
Wei Li,Bangfu Huang,Xinchao Fan,Keying Zhu,Fu Yuan,Yihang Shi,Zhe Shi,Linjing Yang,Kui Zheng
In order to investigate the nucleation thermodynamics and nucleation kinetics of (NH4)2SO4 during cooling crystallization under the synergistic effect of different ratios of NH4F and NH4Cl, the solubility and width of the metastable zone width of (NH4)2SO4 in the mixed solution were determined by gravimetric and laser methods by incorporation of (NH4)2SO4 in a mixture of different ratios of NH4F and NH4Cl in this study. It is demonstrated that the dissolution of (NH4)2SO4 is a heat-absorbing process, that the inhibition of (NH4)2SO4 nucleation by NH4F is much greater, and that the intermediate stabilization zone of (NH4)2SO4 is enlarged with an increase in the cooling rate. Based on the self-consistent Nývlt-like equation and the classical three-dimensional nucleation theory, the nucleation kinetics of (NH4)2SO4 under the synergistic interaction of NH4F and NH4Cl was investigated, and the critical nucleation parameters of (NH4)2SO4 under the synergistic interaction of NH4F and NH4Cl were obtained.
研究领域:
化学工程
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物理化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2018
·Vol. 43
·期 4
·1851-1856
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IF 3.201
Aifeng Jiang,Fang Wang,Debin Xia,Mengru Li,Liangsheng Qiang,Zhaoyang Zhu,Ping Wang,Ruiqing Fan,Kaifeng Lin,Yulin Yang
Aluminum nanoparticles are widely employed in many fields. However, methods for producing aluminum nanoparticles on a large scale are limited. In this work, we introduce a facile method for manufacturing nanosized aluminum powders on a hundred-gram scale. The key reagents used are ammonium chloride and aluminum(III) acetylacetonate, employed as a grinding aid and surface passivation agent, respectively. The obtained aluminum nanoparticles present excellent stability and are fully characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption isotherms. Well-formed aluminum nanoparticles with average particle sizes of approximately 30 nm and high specific surface areas of over 30 m2 g−1 can be obtained using the optimal ball-milling reaction time. In this case, the initiation temperature of oxidation was observed at approx. 150 °C and the weight increased by approx. 39% when heated under an air atmosphere. Furthermore, these aluminum nanoparticles achieved quick combustion and a flame temperature of over 1100 °C, which have not been observed using micron aluminum powders. This work provides a facile method for the industrial manufacture of high-quality nanosized aluminum powders.
研究领域:
材料科学
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纳米技术
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化学工程
✓ 已验证
DOI
高影响因子
Journal of Analysis and Testing
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2023
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IF 4.7
Shen Lingqi,Jin Xiangzi,Zhang Zhihui,Yi Yuexing,Zhang Jingyu,Li Zuguang
Eugenol is extensively utilized in chemical industry. In actual production, it is mainly separated from clove essential oils (EOs) through acid–base solutions. In this work, a simple, rapid and effective extraction process was developed for the extraction of eugenol from EOs samples by directly forming deep eutectic solvents (DESs) without using acid–base solutions. The proposed process is designed to dissolve EOs in n -hexane and eugenol was highly selective extracted into DESs with tetrabutylammonium chloride (TBAC). Hydrogen bonds in DESs can be broken by addition of water, resulting in a separation of the two phases, thus obtaining a hydrophobic yellowish eugenol in the upper layer. The quaternary ammonium salt in the lower aqueous solution can be reused after recovery. The most determining influence factors such as the structure of quaternary ammonium salt, the mole ratio of quaternary ammonium salt to eugenol and the amount of n -hexane were investigated. The forming conditions of DESs were studied by Box–Behnken design (BBD). Experiment was carried out under the optimal conditions and good experimental result was demonstrated by the developed process, a high extraction recovery of 92.51% and the purity was about 98.50%, which verifies the excellent performance for the proposed process.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2024
·
IF 8.7
Xiaojie Hu,Ting Xiao,Qidong Huang,Shichen Liu,Hongxia Liu,Sili Ren,Dandan Gong,Wuhui Luo
The use of a resin to selectively separate thiomolybdate from a tungsten (W) feed solution is a well-known protocol for achieve high-purity W products; however, the regeneration of saturated resin is laborious. In this study, poly(diallyl dimethyl ammonium chloride) (PDADMA) was used to modify ultrasound-pretreated montmorillonite (Mt) for W and molybdenum (Mo) separation for the first time, and the resultant tetrathiomolybdate (MoS 4 2- )-loaded composite was further tested to remove heavy metals instead of regeneration. Among the three variables of ultrasound pretreatment, that is, Mt concentration, ultrasound power, and treatment time, the Mt concentration exhibited the most significant influence followed by ultrasound power on the separation performance of W and Mo. Compared to the distance of the interlayer space and the surface charge of the modified Mt, the PDADMA content showed a closer correlation with the W/Mo separation coefficient. Assisted by Box–Behnken design, with Mt concentration of 6.9 g/L, ultrasound power of 593.8 W, and treatment time of 13.8 min, the composite with the greatest separation coefficient was obtained. The adsorption of Cu(II) on the optimal W/Mo separation-derived composite was ascribed to the formation of Cu-S complexes, while that of Pb(II) was attributed to complexation and surface precipitation. In contrast, ion exchange with the initially loaded anions, reduction by sulfide to Cr(III), and formation of Cr(III)-S complexes accounted for Cr(VI) removal. The adsorption of Cu(II) and Pb(II) equilibrated faster and showed higher acid-resistance than that of Cr(VI). The adsorption capacities for Cu(II), Pb(II), and Cr(VI) were 0.535, 1.398, and 0.882 mmol/g, respectively. Applying PDADMA to modify Mt as a reagent for W/Mo separation was feasible, and the derived composite was capable of removing cationic and anionic heavy metals.
研究领域:
材料科学
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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 COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Beibei Zong,Wuyou Fu,Zu-an Guo,Shaowei Wang,Liwen Huang,Bo Zhang,Hari Bala,Jianliang Cao,Xiaodong Wang,Guang Sun,Zhanying Zhang
Organic-inorganic hybrid perovskite solar cells (PSCs) have become a research hotspot due to the impressive photovoltaic performance . The perovskite film plays an extremely important role in the light-to-electricity conversion, meanwhile, the stability of PSCs is also an important factor affecting the application of devices. Here we demonstrate a kind of stable PSCs by using simple solution-process in an air enviroment with about 45% relative humidity. Firstly, the NH 4 Cl was added to the perovskite precursor solution to adjust the kinetics of crystallization and growth of active layer, and then obtain high-quality CH 3 NH 3 PbI 3 perovskite films. Hydrophobic carbon electrode was used to protect the perovskite active layers and further improve the stability of PSCs, which optimized the structure of the devices at the same time. We adjusted the amount of NH 4 Cl in the perovskite precursor solution (PbI 2 : CH 3 NH 3 I: NH 4 Cl = 1: 1: x ( x = 0 ∼ 1), and investigated the effect of that on the properties of perovskite active layers and PSCs. The above results showed that the devices achieved fully covered perovskite thin films and improved the photovoltaic performance of PSCs when the NH 4 Cl additive was x = 0.8. The short-circuit current density ( J sc ), fill factor (FF) and power conversion efficiency (PCE) were significantly enhenced. Under the condition of ambient air and no encapsulation, the PSCs exhibited good stability after 576 h test, and the PCE was still about 96% of the initial efficiency.
研究领域:
材料科学
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能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chang Du,Shuai Ma,Meiying Xie,Fan Yang,Zhigang Zhao,Yun Chen,Ying Ma
This paper proposes a new integrated method for recycling permanent magnet waste by betaine hydrochloride ([Hbet]Cl) solution extraction. The orthogonal experiment method was used to analyze four factors in the leaching process to explore the primary and secondary factors influencing the leaching results. The following optimum leaching conditions were obtained: leaching temperature of 200 ℃, leaching time of 8 h, lixiviant [Hbet]Cl concentration of 0.2 mol/L, and solid–liquid ratio of 1:150 g/ml. These conditions yielded the optimum leaching results of 99.81 % Pr, 97.05 % Nd, 95.51 % Gd, 56.24 % Ce and 0.20 % Fe, and almost all iron oxide remained in the residue. Compared with the results for common lixiviants, the proposed method showed a better leaching rate and selectivity, and the leaching sequence was in line with established chemical properties. The method is characterized by a high recovery rate, strong selectivity, environmental friendliness and low cost. The leaching mechanism was analyzed, and the crystal lattice energy U values of ionic crystal decomposition were calculated to explain the dissolution sequence and solubility difference of metal oxides, laying a foundation for the recovery process.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
·
2020
·
IF 2.245
Menglei Zhang,Hao Song,Chenghang Zheng,Zhenglong Lin,Yi Liu,Weihong Wu,Xiang Gao
Disposal of spent catalyst in an economical and green way has become a great concern for industrial production. We developed a process including acid leaching, solvent extraction and stripping in order to recycle spent catalyst. In this study, we conducted selective recovery of molybdenum through focus on finding an optimized extraction and stripping process by comparing different extractants and stripping agents. To separate molybdenum from other metals efficiently and figure out the mechanism of extraction process, the five different extractants of methyl trioctyl ammonium chloride, tri-n-octylamine, tris (2-ethylhexyl) amine, bis (2-ethylhexyl) phosphate, and tributyl phosphate with different functional groups were examined; the extraction ability and extraction mechanism of these five extractants were systematically studied under the same system for the first time. It was found that more than 98% of the molybdenum could be extracted with an organic phase consisting of tri-n-octylamine or methyl trioctyl ammonium chloride under the optimal conditions. The result indicated that the tri-n-octylamine and methyl trioctyl ammonium chloride possess excellent molybdenum extraction ability, the extraction capacity of the rest extractants was in the order of bis (2-ethylhexyl) phosphate > tris (2-ethylhexyl) amine > tributyl phosphate. In the stripping process, NH4OH, NaOH, and H2SO4 were chosen as stripping agent to strip the molybdenum from the loaded tri-n-octylamine organic phase. The stripping ability of the three studied stripping agents was in the order NaOH > NH4OH > H2SO4. The Fourier transform infrared (FTIR) spectra showed that the structure of the tri-n-octylamine organic phase was stable during the extraction and stripping process. Results showed that molybdenum could be highly and efficiently recovered by optimized extraction and stripping process.Implications: A series of different extractants and stripping agent have been systematically studied in order to compare their extraction and stripping ability under the same system. Based on the obtained results, an optimized extraction and stripping process was proposed to recycle molybdenum from spent catalyst efficiently. It is possible to dispose spent catalysts in an economic and environmental way by this developed metal recovery process.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2017
·
IF 0
Jinming Hua
Inorgano–organo–bentonite (PMBt) was synthesized through co-modification of bentonite with manganese oxides and poly(dimethyldiallylammonium chloride) (PDMDAAC), and was utilized to remove low-concentration arsenic from water. The hybrid material was characterized by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and N 2 adsorption–desorption. It was revealed that the hybrid material possessed an amorphous structure and displayed uneven manganese oxides particles gathering about the bentonite aggregates with a large BET area of 128.90 m 2 /g. The effects of adsorption parameters were investigated, such as stirring time, arsenic concentrations, adsorbent dose, temperature, pH, added anions and ionic strength. The adsorption kinetics and equilibrium of arsenic on the co-modified bentonite were further determined. The results revealed that the adsorption of arsenic was dramatically affected with change in solution pH and significantly suppressed by phosphate anion. The adsorption kinetic data was best fitted with the linear pseudo–second–order model and was well with the non-linear Bangham model. The equilibrium data were well simulated with the Brunauer–Emmett–Teller, Freundlich and Redlich–Peterson isotherms by either non-linear or linear regression, respectively. The non-linear Langmuir isotherm showed best fitting and the maximal adsorption capacity was 9.14–9.99 mg/g, dependent on the error function used. It was suggested that the hybrid material had a heterogeneous surface and high affinity towards arsenic, which is highly favorable for arsenic adsorption following a non-ideal monolayer adsorption model. Based on the above comprehensive analysis, the plausible mechanism for arsenic adsorption on PMBt was suggested as a mixed removal mechanism i.e., electrostatic attraction followed by inner-sphere complexation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
MINERALS ENGINEERING
·
2021
·
IF 4.765
Haoran Sun,Wanzhong Yin,Bin Yang,Keqiang Chen,Qiuyue Sheng
The flotation performances of magnesite and quartz were investigated in this work using N-hexadecyltrimethylammonium chloride (HTAC) as a collector. Micro-flotation tests were performed in a pilot study, and the results demonstrated that HTAC had high selective collection ability to quartz. Further, batch flotation results showed that HTAC could effectively remove quartz from magnesium-bearing carbonate ores. The adsorption behaviors of HTAC onto the surfaces of two minerals were analyzed through zeta-potential measurements and X-ray photoelectron spectroscopy (XPS) detection, which revealed that HTAC was mainly adsorbed on quartz rather than magnesite. Thus, HTAC could be used as a high-selectivity collector to efficiently separate magnesite from quartz.
研究领域:
矿物加工工程
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材料科学与工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）