JOM
·
2021
·Vol. 74
·期 2
·622-633
·
IF 2.474
Liu Zhihong,Ye Fengchun,Chen Rui,Wang Hongjun,Xia Longgong
Halogen-containing organic components in waste electrical and electronic equipment have an obvious influence on the distribution behaviors of valuable metals during the smelting processes. However, the mechanism is still incomplete in the literature. The equilibration-quenching-(ICP+EPMA) experimental technique has been applied in studying the partitioning behaviors of Au, Ag, and Sn in the Cu-FeO x -SiO 2 -CaO-Al 2 O 3 smelting system in the presence of halogen elements (F, Cl, Br). The obtained results showed that: (1) 93% Au terminated into the alloy phase in CaF 2 adding experiments, and a maximum of 32% Au reported to the gas phase in CaCl 2 or CaBr 2 adding experiments; (2) 22–49% Ag entered the gas phase when adding CaF 2 into the system, and 3–34% Ag entered into the gas phase when adding CaCl 2 or CaBr 2 ; and (3) halogen elements influenced Sn dramatically, and portions of Sn in the gas phase and slag phase increased along with increasing temperature or halides dosage.
研究领域:
冶金学
·
材料科学
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产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.2
Yajuan Li,Yanyang Wu,Kui Chen,Bin Wu,Lijun Ji,Jiawen Zhu
A polymer–salt aqueous two-phase system based on polyethylene glycol and sulfates was applied to explore the partition behavior of spiramycin. Binodal curves were measured by the turbidimetric titration method. The influence of temperature, salt concentration, and pH on the distribution behavior was investigated in detail by determining the partition coefficient and extraction efficiency. As pH and salt concentration increase, the partition coefficients increase accordingly. It was found that pH displays a significant influence on the partition behavior. The partition coefficient and extraction efficiency can reach 42.46 and 97.8%, respectively, at pH 9.0 and 15.80% (w/w) salt concentration.
研究领域:
生物化学
·
制药工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Wenli He,Yaqin Sun,Xu Zhou,Lusheng Huang,Zhilong Xiu
In this study, hydrophobic deep eutectic solvents (HDESs) based on trioctylmethylammonium chloride (TOMAC) and medium-chain fatty acids were investigated for the extraction of carboxylic acids. The effects of molar ratio, extraction temperature, vortex time, pH, and carboxylic acid concentration on the partition behavior of carboxylic acids were evaluated. The natural logarithm of partition coefficients (lnK) for six kinds of mono and five kinds of binary carboxylic acids in the TOMAC-OctA system exhibits an excellent linear relationship to the ClogP of carboxylic acids. Quantum chemical calculations using density functional theory showed that one hydrogen bond is formed between lactic acid (LA) and TOMAC-OctA, while double hydrogen bonds between succinic acid (SA) and TOMAC-OctA. However, extraction of butyric acid (BA) is driven by van der Waals force. Furthermore, analysis of the interaction energy revealed that TOMAC-OctA possesses the highest affinity for the extraction of BA, followed by SA and LA.
研究领域:
化学工程
·
环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Lili Huo,Guansheng Liu,Yan Li,Xin Yang,Hua Zhong
One-dimensional flow column experiments are conducted to specifically compare the transport behavior of three surfactants (sodium dodecyl benzene sulfonate (SDBS), Triton X-100, rhamnolipid) and a solvent n-propanol and their solubilization on dodecane in porous media . Compared to pentafluorobenzoic acid (PFBA), the low adsorption or partition loss of n-propanol incurred no retardation, shouldering or retention in breakthrough curves. While for surfactants, all the breakthrough curves exhibited retardation, shouldering or retention to different degrees in the presence of dodecane phase. Compared to the anionic SDBS with no significant bulk partition to non-aqueous phase liquid (NAPL), the non-ionic Triton X-100 with partition induced significant retardation and shouldering in breakthrough curves. The retention loss of solubilized aggregates resulted in obvious retention of rhamnolipid at different pore-water velocities. The increase of pore-water velocity could promote the transport of surfactants and the dodecane-surfactant aggregates. The elution of dodecane in the presence of surfactants showed a significant relation to the partition behaviors of surfactants and a characteristic of the rate-limited solubilization. In contrast, the n-propanol, which is basically a non-reactive solvent, exhibited the rapid equilibrium dissolution of dodecane. The results indicated that in remediation of field sites contaminated by hydrophobic organic contaminants (HOCs), the surfactants should be rationally selected, and a favorable pore-water velocity should be used to obtain a high remediation efficiency and to reduce the retention loss of surfactants as well.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Shushi Zhang,Zhenyang Wang,Peng Hu,Jiating Rao,Jianliang Zhang,Jing Pang
The HIsmelt process is well suited for smelting vanadium-titanium magnetite and has significant potential. In this paper, the vanadium and titanium distribution behavior at 1450 °C in the basicity range of 0.3–1.2 during HIsmelt smelting vanadium titano-magnetite was investigated experimentally for the first time. According to thermodynamic calculations combined with experimental validation, lower C content increases the activity coefficients of vanadium and titanium in the metal. Higher basicity decreases the activity coefficients of TiO 2 and SiO 2 in the slag, improves the distribution ratio of vanadium and titanium. Increasing C content and reducing basicity could increase the content of vanadium in the metal and TiO 2 in the slag, which is favorable to vanadium extraction and titanium recovery. Furthermore, the V and Ti content in the hot metal increased significantly with rising smelting temperature. Higher smelting temperatures promote vanadium distribution into hot metal but not titanium distribution into slag. Finally, The Si and Ti distribution ratios have a positive connection according to the fitted models.
研究领域:
冶金学
·
材料科学
·
化学工程
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DOI
高影响因子
FOOD CHEMISTRY
·
2017
·
IF 4.529
Hongpeng Yang,Li Chen,Cunshan Zhou,Xiaojie Yu,Abu ElGasim A. Yagoub,Haile Ma
Polyethylene glycol (PEG) is widely used in the polymer-salt systems. However, the low polarity of the PEG-rich phase limits the application of aqueous biphasic systems (ABS). To overcome this disadvantage, a small quantity of ionic liquid (IL) was used as an adjuvant in ABS to enlarge the polarity range. Therefore, an innovative study involving addition of 4 wt% imidazolium-based ILs to the PEG 600/NaH 2 PO 4 ABS, aiming at controlling the phase behavior and extraction ability, was carried out. The phase diagrams, the tie-lines and the partitioning behavior of l -phenylalanine and ILs were studied in these systems. The results reveal that l -phenylalanine preferentially partitions for the PEG-rich phase. The addition of 4 wt% IL to ABS controls the partitioning behavior of l -phenylalanine, which depends on the type of IL employed. Moreover, it is verified that increasing temperature lead to a decrease in the partition coefficient of l -phenylalanine.
研究领域:
化学工程
·
分析化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
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