MINERALS ENGINEERING
·
2021
·
IF 4.765
Qingyou Meng,Yuankai Xu,Zhitao Yuan,Xuan Zhao,Yusheng Du
The mixed BHA/NaOL surfactant was proposed as a flotation collector for the separation of ilmenite from titanaugite. Both experimental and computational studies were applied to reveal the interaction mechanism between minerals and mixed BHA/NaOL collector. Microflotation tests showed that the floatability of ilmenite was higher than titanaugite with mixed BHA/NaOL collector. The experiment of artificially mixed minerals achieved an excellent indicator with 86.50% of recovery and 39.42% of TiO 2 grade. The results of zeta potential, AFM and XPS analyses indicated that the mixed BHA/NaOL interacted with Fe and Pb active sites and co-adsorbed onto the ilmenite surface, but only physical adsorption on the titanaugite surface. Simulation results evidenced that BHA/NaOL collectors could substitute water molecules on ilmenite surface rather than titanaugite and form a stable hydrophobic layer on the ilmenite surface. These observations contributed to enlarging the floatability difference between ilmenite and titanaugite.
研究领域:
矿物加工工程
·
表面化学
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产品关联
DOI
高影响因子
Food Analytical Methods
·
2018
·Vol. 11
·期 12
·3380-3390
·
IF 2.245
Tang Jing,Mao Yueyuan,Guo Jiahao,Li Zirong,Zhang Chen,Jin Baokang
A glassy carbon electrode (GCE) was modified with eosin Y that was electrodeposited on GCE via continuous cycling between − 1.6 and 1.5 V (vs Ag/AgCl). This electrode was characterized by scanning electron microscopy and electrochemical impedance spectra. The resulting electrode exhibited excellent electrocatalytic activity toward the oxidation of butylated hydroxyanisole (BHA) and tert-butyl hydroquinone (TBH 2 Q); in addition, the oxidation products of BHA and TBH 2 Q were found to be the same, which was studied by CV and in situ FT-IR spectroelectrochemistry. Under the optimized condition, the oxidation peak currents were linear to BHA/TBH 2 Q in the range from 0.10 to 7.00 μg mL −1 with the detection limits of 0.01 μg mL −1 (S/N = 3) for BHA and 0.015 μg mL −1 (S/N = 3) for TBH 2 Q, respectively. Moreover, the reproducibility and repeatability of the electrode were determined. The proposed method was successfully applied in the simultaneous determination of BHA and TBH 2 Q in several edible oil samples, and satisfactory results when compared with those obtained using high-performance liquid chromatography.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Longfu Dai,Jian Liu,Da Li,Jiamei Hao,Hulin Gao
The hydroxamic acid reagents are extremely pervasive in the collector of scheelite flotation. The high flotation cost is caused by its large dosage and high price. A novel auxiliary collector 4-methodybenzoicacid (4-MBA) was used in combination with benzohydroxamic acid (BHA) to optimize the flotation reagents system for scheelite in the study. A single 4-MBA has weak collection capacity for scheelite. Nevertheless, the combination of 4-MBA and BHA optimized the flotation system of scheelite by ensuring its recovery and reducing the reagent consumption. The results of solution surface tension and contact angle measurements showed that the surface tension of the mixed reagent solution is a relatively lower and the hydrophobicity of the scheelite surface is a relatively higher in the BHA and 4-MBA mixed reagent system. Additionally, a synergistic effect between BHA and 4-MBA on Pb 2+ activated scheelite is revealed by the Zeta potential measurements, infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The addition of 4-MBA promoted the physical and chemical adsorption of BHA. The results of molecular dynamics simulation (MDS) further explained that the collector adsorption layer of the surface of scheelite (1 1 2) is more compact under BHA and 4-MBA mixed reagent system, which prevents the vertical entry of water phase and improves the hydrophobicity of scheelite. Finally, the bench-scale flotation experiment verified that the addition of 4-MBA enhanced scheelite flotation with BHA, and decrease the flotation cost of scheelite.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2021
·
IF 4.765
Yuankai Xu,Zhitao Yuan,Qingyou Meng,Xuan Zhao,Yusheng Du
The mixed BHA/NaOL collector was studied to improve the floatability of ilmenite in the presence of lead ions. The mechanism was discussed through surface tension measurements, zeta potential measurements, adsorption amount measurements, and XPS analysis. Microflotation results show that the mixed BHA/NaOL collector exhibited a better performance on the floatability of ilmenite than single BHA and NaOL collector. The recovery of ilmenite was 92.9% when the molar ratio of BHA/NaOL was set to 7:3. The adsorption amount of mixed collectors on the ilmenite surface was greater than that of equivalent single BHA and NaOL. The results of surface tension suggest that there was synergism between BHA and NaOL in aqueous solution. Zeta potential results indicate that mixed BHA/NaOL adsorbed onto ilmenite surface and had a more negative shift than single BHA. XPS results further confirm that BHA and NaOL adsorbed onto the ilmenite surface through chemisorption and hydrogen bonds.
研究领域:
矿物加工
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表面化学
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材料科学
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产品关联
DOI
高影响因子
LUMINESCENCE
·
2014
·Vol. 29
·期 8
·1027-1032
·
IF 1.675
Shuangjiao Xu,Funan Chen,Mao Deng,Yanyan Sui
A highly sensitive and convenient high-performance liquid chromatography technique coupled with chemiluminescence detection for the simultaneous determination butylated hydroquinone (TBHQ) and butylated hydroxyanisole (BHA) in oil is established. The detection is based on the inhibitory effect on the CL reaction between luminol and potassium ferricyanide in an alkaline medium. Samples were separated through a reverse-phase C 18 column using a mobile phase of methanol and water (80: 20, v/v) at a flow rate of 0.5 mL/min. The effects of various parameters including mobile phase, flow rate and chemiluminescence regent were studied. Under optimum conditions, both TBHQ and BHA showed good linear relationships in the range 1 × 10 -7 –1 × 10 -5 g/mL with detection limits of 24 and 33 ng/mL, respectively. The proposed method is simple and sensitive, with low costs. The method was successfully applied for the quantification of TBHQ and BHA in sesame oil. The possible inhibition mechanism is also discussed briefly. Copyright © 2014 John Wiley & Sons, Ltd.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2024
·
IF 2.9
Shuang Hu,Zhuang Fu,Jiawen Zhang,Yihua Qian,Hongmei Wang
The combination of phenolic and amine additives represents a traditional approach for the co-formulation of antioxidant compounds in insulating oils. However, the introduction of amines not only induces significant alterations in the inherent characteristics of the oil but also gives rise to aging by-products that are environmentally detrimental. This study examines the aging behavior of three commonly employed phenolic antioxidants, namely BHT, BHA, and TBHQ, when added individually or in combination to synthetic ester insulating oil. The investigation reveals that the co-formulation of phenolic antioxidants demonstrates exceptional antioxidant efficacy within synthetic ester insulating oil. Through the oxidative stability test, it is observed that incorporating a combination of 0.3 wt% BHT and 0.1 wt% BHA into the oil maintains the dielectric dissipation factor at 0.681%, representing a mere 0.202% increase compared to fresh oil. Furthermore, the total acid number can be sustained at 0.01 mg KOH/g, and the breakdown voltage can be up to 78 kV. This study employs linear sweep voltammetry (LSV) and Fourier-transform infrared spectroscopy (FT-IR) to analyze the behavior of antioxidants and the degradation products of aged oil samples. A preliminary investigation into the synergistic antioxidant mechanism of phenolic antioxidants in synthetic ester insulating oil is conducted, to provide a novel approach for the formulation of antioxidant compounds.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Xiaoyun Lin,Yongnian Ni,Serge Kokot
Electrochemical behavior of three antioxidants: butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and butylated hydroquinone (TBHQ), was investigated at a glassy carbon electrode modified with gold nanoparticles (AuNPs/GCE). This electrode was characterized by scanning electron microscopy (SEM). The experimental results indicated that the modified electrode was strongly electroactive during the redox reactions of BHA, BHT and TBHQ, and this was confirmed by the observed increased redox peak currents and shifted potentials; in addition, the oxidation products of BHA and TBHQ were found to be the same. The experimental conditions were optimized and the oxidation peaks of BHA and BHT were clearly separated. Based on this, an electrochemical method was researched and developed for the simultaneous determination of BHA, BHT and TBHQ in mixtures with the use of first derivative voltammetry; the linear concentration ranges were 0.10–1.50 μg mL −1 , 0.20–2.20 μg mL −1 and 0.20–2.80 μg mL −1 , and detection limits were 0.039, 0.080 and 0.079 μg mL −1 , for BHA, BHT and TBHQ, respectively. The proposed method was successfully applied for the analysis of the three analytes in edible oil samples.
研究领域:
分析化学
·
食品科学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Rui Tan,Ziji OuBu,Qun Zhou,Juan Mu,Chenxi Yi,Xiaojun Luo
The presence of dexamethasone (DEX) residues and the illegal addition of DEX to food have garnered widespread public concern over recent decades. Based on the bicycled hairpin assembly (BHA) mechanism and the catalytic oxidase effect of urchin-shaped Au–Ag alloy loaded with Pt nanoparticles (Au@Ag@Pt), an accurate and ultrasensitive surface-enhanced Raman scattering (SERS)/colorimetric dual-mode method for DEX detection is pioneered. When DEX is introduced into the sensor system, the BHA cycle begins. The Fe3O4 nanosphere loaded with Au nanoparticles (Fe3O4@Au) surface facilitates the anchoring of a large amount of Au@Ag@Pt, resulting in synergistic signal amplification and facile magnetic separation from the complex system. Finally, the collected product effectively catalyzes the conversion of 3,3′,5,5′-tetramethylbenzidine (TMB) to the oxidized product, producing a strong SERS response, an ultraviolet–visible absorption signal, and color deepening. Our dual-mode platform achieves ultrasensitive detection of DEX, achieving a detection limit (LOD) of 6.61 × 10–17 M within the broad range of 10–16 to 10–9 M for SERS and a LOD of 8.81 × 10–13 and 6.98 × 10–13 M within the range of 10–12–10–5 M for the colorimetric method. Additionally, this platform shows high selectivity and satisfactory recovery rates for DEX in milk and pork samples, with recoveries of 92.3%–106.5% (RSDs <8.35%) for SERS and 95.2%–107.6% (RSDs <8.81%) for colorimetric analysis. This study demonstrates that by combining the BHA amplification process with multifunctional Au@Ag@Pt and Fe3O4@Au substrates, the DEX content in actual food samples can be accurately determined using a dual-mode approach that combines the high sensitivity of SERS with the simplicity of colorimetric analysis.
研究领域:
分析化学
·
食品安全
·
纳米生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2022
·
IF 5.479
Qinzhi Yuan,Guangjun Mei,Cheng Liu,Qian Cheng,Siyuan Yang
The benzohydroxamic acid (BHA) and sodium butyl xanthate (SBX) mixture was used as a collector for the flotation of moderately oxidized pyrrhotite (MOP) in this work. Microflotation results revealed that the flotation recovery of MOP was not very high with the addition of individual SBX or BHA collector, but significantly improved using a mixed collector of SBA/BHA, the maximum flotation recovery of could reach 88.55%. Zeta potential measurement revealed that the surface charges of MOP were negatively moved after the addition of mixed SBX/BHA compared to adding SBX or BHA alone, revealing a much stronger interaction between the collector mixture and MOP surface, leading to the improvement of MOP floatability. The FTIR spectra analysis revealed that the synergistic effect of SBX/BHA was attributed to the interaction between BHA and MOP, which could reduce the hydrophilic Fe(OH) 3 on the pyrrhotite surface, allowing more adsorption of SBX onto the generated fresh unoxidized surfaces.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Guihong Han,Yifan Du,Yanfang Huang,Shuzhen Yang,Wenjuan Wang,Shengpeng Su,Bingbing Liu
Benzohydroxamic acid (BHA) is intensively used as collector in the mineral processing industry, and thus tremendous hazardous beneficiation wastewater containing BHA organic contaminant needs urgent treatment. In this work, an efficient removal of BHA organic contaminants from various industrial beneficiation wastewaters via the chelation, flocculation, and precipitation flotation process was studied. The removal efficiency of BHA, COD and turbidity of the purified water, and the chelation mechanism were investigated by optical microscope, SEM, FTIR, XPS, Zeta potential, and thermodynamic analyses. The results showed that organic BHA contaminant can be chelated firstly by Cu(II) to form hydrophobic BHA-Cu precipitate effectively via the “O-O” chelation and a five-membered chelation ring was formed under weak alkaline conditions. The generated precipitate was then successfully removed using CTAB as surfactant and NP-40 as frother in a microbubble flotation column. Over 94% BHA was removed under the optimal chelation, flocculation and flotation conditions: chelation with Cu(II) concentration of 30 mg/L and pH of 8 for 30 min; flocculation with CTAB concentration of 0.2 mg/L for 20 min; followed by flotation with NP-40 frother of 0.6 mg /L and air flow rate of 100 mL/min for over 40 min. Under this condition, 83.91% COD was removed, and the residuel COD and turbidity of the purified water were lower than 25 mg/L and 0.1 NTU, respectively, which met the wastewater discharge requirement. It’s demonstrated that the precipitate flotation can be employed as an effective method to purify industrial wastewater containing BHA. In addition, the interaction mechanism of Cu(II) and BHA under different pH values was also discussed in this work.
研究领域:
环境科学
·
化学工程
·
矿物加工工程
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2026
·
IF 6
Wanting Yang,Chenxu Wang,Yuchen Shi,Hongchang Liu,Jun Wang
High Mg 2+ induces hydrophilic deposits that passivate malachite. • Mg 2+ deposition suppresses Cu–S film formation during sulfidization. • Mixed collectors improve malachite flotation in high-Mg 2+ recycled water. • XPS, SEM–EDS and ToF-SIMS reveal Mg coverage and Cu–S film evolution. The flotation recovery of malachite from complex polymetallic ores is often severely depressed by high concentrations of Mg 2+ in recycled water; however, the underlying mechanism and effective mitigation strategy remain unclear. In this study, microflotation experiments combined with surface characterization and spectroscopic analyses were conducted to elucidate the inhibitory role of Mg 2+ in malachite sulfidization flotation and to evaluate the performance of a mixed-collector system. The results showed that in the sodium hydrosulfide (NaHS)–potassium butyl xanthate/potassium amyl xanthate (PBX/PAX) system, increasing the Mg 2+ concentration from 0 to 100 mmol/L decreased malachite recovery by 37.13%. In contrast, the addition of benzohydroxamic acid (BHA) to the PBX/PAX system markedly improved flotation recovery under high-Mg 2+ conditions. Scanning electron microscopy coupled with energy-dispersive spectroscopy (SEM–EDS), zeta-potential, X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS) revealed that Mg 2+ promoted the formation of a heterogeneous Mg(OH) 2 –Cu–S composite deposit layer on the malachite surface, which blocked active Cu sites and suppressed the formation of the Cu–S sulfidized film. Contact-angle and adsorption results further showed that the synergistic interaction between BHA and PBX/PAX accelerated and enhanced collector adsorption, leading to a more stable hydrophobic surface. Fourier transform infrared (FTIR) spectra indicated that xanthates chemisorbed on Cu–S sites through Cu–S–C bond formation, whereas BHA coordinated with surface Cu 2+ via Cu–O/N chelation. Their cooperative adsorption resulted in the formation of a Cu–S/Cu–O/N composite interfacial layer, which effectively alleviated Mg 2+ -induced surface passivation. These findings demonstrated that the mixed-collector system restored the hydrophobicity and flotation performance of malachite in high-Mg 2+ water through synergistic interfacial reconstruction.
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2022
·
IF 5.64
Jiaozhong Cai,Bozeng Wu,Jiushuai Deng,Mingzhen Hu,Mingzhen Wu,Pingping Wei,Xiaohao Sun,Hongxin Qiu,Xiaoli Jin,Xiao'an Hou,Hongxiang Xu
In this study, a novel method of promoting cassiterite flotation involves adding Pb-BHA (Pb(NO 3 ) 2 -benzohydroxamic acid) complexes to the cassiterite grinding process was investigated. The flotation result showed that adding Pb-BHA complexes before grinding had a marked effect on the cassiterite flotation recovery. The cassiterite flotation recovery with Pb-BHA complexes added before grinding was higher 42.80% than that of Pb-BHA complexes added after grinding. Moreover, it revealed a similar trend for artificial mixed minerals of cassiterite and quartz, in which the Sn recovery and grade of concentrate increased by 34.71% and 1.11%, respectively. The Fourier-transform infrared spectroscopy (FT-IR) analysis revealed that adding Pb-BHA complexes before grinding enhanced the adsorption of Pb-BHA complexes on the cassiterite surface. And the X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the chemical environment of N in Pb-BHA complexes was changed in the grinding, making it more easily to adsorb on cassiterite surface.
研究领域:
矿物加工
·
材料科学
·
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）