SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yue Sun,Yuanyuan Wang,Zheng Peng,Yan Liu
Sulfanilic acid (SA) is an important organic compound with numerous applications in industrial production, while the organic wastewater with high salinity is inevitably generated. In this work, desalination strategy of hypersaline SA wastewater was proposed by using bipolar membrane electrodialysis (BMED), which can realize the separation of SA and NaCl in wastewater and the conversion of NaCl into HCl and NaOH simultaneously. The influences of current density, initial concentrations of acid, base, SA and salt were investigated. The results showed that current efficiency decreased and energy consumption increased with an increase in current density. Higher initial concentrations of acid and base were favor to reduce energy consumption but current efficiency was low. At the current density of 40 mA/cm 2 , the initial acid and base concentrations of 0.10 mol/L, the highest concentrations of HCl and NaOH with initial salt concentration in the simulated feed solution of 80 g/L NaCl was 1.17 mol/L and 1.18 mol/L, respectively. Moreover, the total process cost of BMED process was estimated at $1.68/kg HCl and $1.52/kg NaOH respectively under the optimal experimental conditions. These findings confirmed that BMED may be an alternative and cost-effective strategy for treating high salinity SA wastewater.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 6
·1865-1872
·
IF 4.831
Huang Pengcheng,Li Jianfang,Song Juan,Gao Nan,Wu Fangying
The authors demonstrate a single-step histidine assay that is based on the use of silver nanoparticles modified with sulfanilic acid (SAA-AgNPs). The presence of histidine leads to a visually detectable gradual color change from bright yellow via orange to purple. The effect is assumed to be mainly due to strong π-π stacking, electrostatic interaction, and hydrogen bonding between SAA and histidine. The assay has a 52.7 nM detection limit and works in the 0 to 3.5 μM concentration range. It is selective over other compounds when using appropriate masking agents. The method has been successfully applied to the colorimetric determination of histidine in (spiked) serum samples. Recoveries ranged between 97 % and 107 %, and relative standard deviations are <0.92 % (for n = 3). The method was also applied to detect polyhistidine-tagged cysteine (His-His-His-His-His-His-Cys) which can be quantified in concentrations down to 5.57 nM. This finding links the method to His-tag technology.
A single-step colorimetric assay for histidine is developed using sulfanilic acid modified silver nanoparticles (SAA-AgNPs) via π stacking, electrostatic interaction, and hydrogen bonding resulting in the aggregation of the AgNPs and a color change from yellow to orange.
研究领域:
分析化学
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生物化学
·
医学诊断
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhiyu Wei,Xiaoqin Li,Shuang Han,Cihang Yan,Mingchao Sun,Yong Liu,Lu Fan
To expand the working pH range of NO 3 – -N reduction from aqueous solution, a two-step method including the Al/Cu bimetal and sulfamic acid reduction was developed. In this process, Al/Cu bimetallic materials were prepared by chemical deposition method and characterized by EDS, SEM, XRD and XPS. The NO 3 – -N reduction batch experiment showed that 100% of NO 3 – -N was reduced and converted to N 2 at pH of 7, Al/Cu dosage of 30 g/L and EDTA-2Na concentration of 6 mmol/L. When the pH value was adjusted to 3, 5 and 9, NO 3 – -N reduction efficiencies ca. 80–97% were also obtained in the first step, and 100% N 2 selectivity was further obtained with the second reduction step at pH of 3, 7 and 9. The kinetics study indicated that the Al/Cu reduction process was in accordance with the pseudo-second order kinetics model.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Xiaoyan Ma,Sinong Huang,Yuhong Jin,Hui Liao,Shaoning Chen,Hong Wang,Weijie Zhang,Yifei Wu,Weiwei Bi,Xueyan Li,Andrea M. Dietrich
Artificial sweeteners (ASs) are ubiquitously detected in the global water system, among which acesulfame (ACE) is an emerging contaminant for its chemical and biological stability and unsatisfying removal by conventional or advanced treatment technologies. Phytoremediation is an effective and sustainable in-situ remediation technology that this study is the first to explore ACE removal by aquatic plants. The emergent plants, Scirpus Validus ( S . validus ), Phyllostachys heteroclada Oliver ( P . heteroclada ) and Acorus tatarinowii ( A . tatarinowii ) showed superior removal capability than eleven floating plants, and demonstrated high phytoremediation efficiencies (PEs) of up to 75 % after 28 d domestication. ACE removal by the three emergent plants increased during domestication, as the PEs after 28 d domestication were 5.6–6.5 times of 7 d domestication. Notably, the half-life of ACE was decreased from 20.0 to 33.1 d to 1.1–3.4 d in the plant-hydroponic system, compared with 481.0–1152.4 d in control water without plants. Moreover, A . tatarinowii demonstrated the highest removal capacity for ACE with 0.37 mg/g fresh biomass weight (FW), higher than S . validus (0.27 mg/g FW) and P . heteroclada (0.20 mg/g FW). It is worth noting that a mass balance analysis demonstrated that plant transpiration and plant uptake account for about 6.72 %–18.54 % and 9.69 %–21.67 % ACE removal, while hydrolysis only accounted for about 4 % and photolysis was negligible. The rest ACE may be used as a carbon source by endophytic bacteria and root microorganisms of plants. In addition, increased temperature, pH, and illumination intensity had a significant effect on phytoremediation. In the selected experimental range, the increase of temperature from 15 °C to 35 °C, illumination intensity from 1500 lx to 6000 lx, and pH from 5 to 9 generally accelerated the PEs of ACE during the domestication process. Though the mechanism still requires further investigation, the results provide scientific and feasible data for removal of ACE from water by diverse plants for the first time, and also revealed insights for in-situ treatment of ACE.
研究领域:
环境科学
·
植物学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 16
·2874
·
IF 3.06
Yu Shao,Zhicheng Pang,Lili Wang,Xiaowei Liu
Artificial sweeteners (ASWs), a class of emerging contaminants with good water solubility, have attracted much attention recently because of their wide use and negative impact on the aquatic environment and drinking water. Efficient technologies for removing ASWs are in urgent need. This study investigated degradation of typical ASW acesulfame by ozone-activated peroxymonosulfate process (O3/PMS) in prepared and real waters. O3/PMS can degrade >90% acesulfame in prepared water within 15 min at a low dosage of O3(60 ± 5 µg∙min−1) and PMS (0.4 mM). Ozone, hydroxyl radical (HO•), and sulfate radical (SO4•−) were identified as contributors for ACE degradation and their contribution proportion was 27.1%, 25.4%, and 47.5% respectively. O3/PMS showed the best degradation performance at neutral pH and were sensitive to constituents such as chloride and natural organic matters. The qualitative analysis of degradation products confirmed the involvement of hydroxyl radical and sulfate radical and figured out that the active sites of ACE were the C=C bond, ether bond, and C-N bond. The electrical energy per order ACE degradation were calculated to be 4.6 kWh/m3. Our findings indicate that O3is an efficient PMS activator and O3/PMS is promising due to its characteristic of tunable O3−HO• SO4•−ternary oxidant involving.Keywords:ozone;peroxymonosulfate;acesulfame;advanced oxidation;sulfate radical
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
Water
·
2025
·Vol. 17
·期 11
·1558
·
IF 3
Chengchen Jiang,Zehong Zeng,Liwen Jiang,Zhi Dang,Xiaohua Shu
Acesulfame potassium (ACE) is an emerging pollutant with the potential to induce a range of health hazards. In this study, waste natural pyrite (with some oxides on its surface) was washed and used as an activator to activate potassium peroxomonosulfate (PMS) to degrade ACE in water. The experimental results demonstrate that waste natural pyrite with an oxidized layer exhibited a significant degradation effect on ACE. Under conditions of 0.7 g/L pyrite and 60 μM PMS, a degradation rate of 99.3% for ACE was achieved within 15 min, and the mineralization rate reached 15.3% within 30 min. In addition, concerning its applicability, waste natural pyrite demonstrates strong activation ability within a pH range of 3 to 7. It is important to note that while HCO3−and Ca2+can influence the effectiveness, other common anions and cations do not significantly affect the degradation process. Mechanistic studies reveal that the primary active species in the waste natural pyrite/PMS system were sulfate radicals (SO4•−) as well as hydroxyl radicals (•OH), which contributed 50.6% and 36.9%, respectively. In addition, the analysis of ACE degradation products indicates that no highly toxic intermediates were generated during the degradation process. Overall, this study underscores the outstanding performance of waste natural pyrite as an activator, providing a safe, efficient, and cost-effective approach for degrading organic pollutants like ACE.
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 MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Lulu Zhang,Zhenning Yan,Yamin Lv,Shuangxia Shen
In the present work, three new pharmaceutical salts based on N -alkyl-pyridinium ([C n Py] + , n = 8, 10, 12) as the cations and acetyl-sulfacetamide ([AceSA] - ) as an anion were synthesized. The thermal stability was measured by synchronous thermal analyzer. The solvation and micellization behaviors in aqueous solution were investigated by experimental density and conductivity data at different temperatures. These data were used to calculate the apparent molar volume at infinite dilution, V 2 , φ 0 , the apparent molar expansibility at infinite dilution, E φ 0 , limiting molar conductivity, Ʌ 0 , critical micelle concentration, cmc , and the relative thermodynamic functions for the micellization of [C n Py][AceSA] in aqueous solution. The effect of the aliphatic chain length of N -alkyl-pyridinium cation and temperature on the estimated properties was examined. The obtained results confirmed that [C n Py] + (n = 8, 10, 12) cations with longer alkyl chain exhibit higher decomposition temperature, large V 2 , φ 0 , low cmc and Ʌ 0 values. The results were discussed in terms of solute–solvent interactions and structural changes of [C n Py][AceSA] in water.
研究领域:
药学
·
物理化学
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产品关联
DOI
高影响因子
Food Analytical Methods
·
2013
·Vol. 7
·期 7
·1400-1406
·
IF 1.969
Liu Tenghao,Jiang Zi-Tao,Li Rong,Tan Jin
This paper aims at establishing a rapid method for simultaneous separation and determination of the sweeteners including cyclamate, acesulfame, and aspartame in beverages by titania-based reversed-phase high-performance liquid chromatography. The chromatographic conditions were as follows: a titania Sachtopore-RP C18 column (250 × 4.6 mm; 5 μm) as a separation column, a mixture of water and methanol at a volume ratio of 95:5 containing 1.0 % phosphate acid used as mobile phase, flow rate of 1.0 mL min −1 , and the detection wavelength was 205 nm. The linear ranges of cyclamate and aspartame were 0.02–8.0 mg mL −1 with limits of detection (LODs) of 16.35 and 19.56 μg mL −1 , respectively, and their limits of quantitation (LOQs) were 55.50 and 68.50 μg mL −1 , respectively. The recoveries of cyclamate were between 93.52 and 103.54 %. The recoveries of aspartame were between 93.31 and 102.63 %. The linear range of acesulfame was 0.125–50 μg mL −1 with LOD of 0.08 μg mL −1 and LOQ of 0.25 μg mL −1 . The recoveries of acesulfame were between 94.34 and 103.21 %. Relative standard deviation ( n = 8) for all determinations was less than 0.72 %.
研究领域:
分析化学
·
食品科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Chen Liu,Yutang Kang,Yuanyuan Rao,Shasha Feng,Feng Zhang,Zhaoxiang Zhong,Weihong Xing
In this study, a polyacrylonitrile (PAN) nanofibrous membrane demonstrating both high particulate matter filtration efficiency and formaldehyde visual detection capabilities was obtained by electrospinning. The additive polyvinylpyrrolidone (PVP) was introduced to adjust the structural characteristics and hydrophilicity of the membrane, while methyl yellow (MY) was added as a colorimetric indicator. Sulfamic acid was then loaded on the membrane to obtain the sensing property. The obtained nanofibrous membrane exhibits excellent PM0.3 filtration efficiency (99.88%) with low filtration pressure drop (159.3 Pa). The sensing accuracy for formaldehyde can reach below 50 ppb (World Health Organization, safety concentration <80 ppb), and it can identify formaldehyde at a concentration of 1 ppm within 10 min. Owing to the specific reaction between sulfamic acid and formaldehyde, the membrane exhibited excellent anti-interference performance against other volatile organic compounds. This nanofiber colorimetric sensing membrane holds great potential for application in respiratory protective equipment.
研究领域:
材料科学
·
环境健康
·
呼吸防护
·
纳米技术
·
分析化学
·
功能材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jishao Jiang,Huilin Cui,Zhuyu Tang,Shipeng Wang,Ke Cheng,Chunyan Zhang,Tonghuan Yu,Jinghua Lv,Fuqiang Yu,Dong Liu
This study investigates the effects of biochar, laccase, and their combined application on nitrogen transformation, the degradation of sucralose (SUC) and acesulfame (ACE), and the dynamics of bacterial communities during sewage sludge composting. The results indicated that NH 3 emissions were reduced by 41.2 %, 17.5%, and 40.8 % in the biochar, laccase, and biochar-laccase treatments, respectively, compared to the control. Meanwhile, N 2 O emissions decreased significantly by 26.8 % and 16.0 % for the biochar and biochar-laccase treatments, respectively, but increased by 8.1 % for the laccase treatment. Additionally, the biochar, laccase, and biochar-laccase treatments enhanced the degradation of SUC and ACE by 36.6–68.3 % and 49.2–69.8 %, relative to the control, respectively. Network analysis showed that the additive-treatment enhanced the cooperation within bacterial communities, and solidified artificial sweeteners degradation, especially under biochar-laccase application. Phylogenetic investigation of communities by reconstruction of unobserved states further indicated that biochar, laccase, biochar-laccase treatment increased enzymes associated with the degradations of organic matter and artificial sweeteners. In conclusion, it suggested that a combined addition of biochar and laccase was an effectively way to reduce nitrogen loss and promote artificial sweeteners degradations during sewage sludge composting.
研究领域:
环境科学
·
微生物学
·
废物管理
·
生物技术
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产品关联
DOI
高影响因子
FOOD CONTROL
·
2014
·
IF 2.819
Juan Song,Fangying Wu,Yiqun Wan,Lihua Ma
Multiple methods have been published to detect melamine, only a few offer sensitivities below 50 nM with complicated procedures and sophisticated equipments. We demonstrate here a simple, rapid and lower-cost assay with high sensitivity for the melamine detection in milk samples using sulfanilic acid-modified silver nanoparticles (SAA-AgNPs). Due to the special chemical structures, SAA shows similar response to its analogues, which reveals that the selectivity and sensitivity of SAA itself is poor. However, the formation of SAA-AgNPs dramatically improves the selectivity of SAA and only melamine reacts with SAA-AgNPs. The possible mechanism is discussed. The interaction between exocyclic amine of melamine and SAA induces rapid aggregation of SAA-AgNPs accompanied by a naked-eye visible color change, resulting in precise quantification of melamine that can be monitored by a simple UV-visible spectrometer. Metal ions, amino acids and sugars that are common in milk have negligible interference influences. The extinction ratio (A 620nm /A 390nm ) is correlated with the melamine concentration over the range of 0.1–3.1 μM. The detection limit is 10.6 nM, which is much lower than the safety limits (8 μM for infant formula in China, 20 μM in both the USA and EU and 1.2 μM in the CAC review for melamine in liquid infant formula). The method is applied successfully to determine melamine in pretreated milk products, indicating the potential practical use for the products suspected of melamine exposure.
研究领域:
分析化学
·
食品安全
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
·
2025
·
IF 3.8
Zeyu Hou,Bingxin Yan,Yuhan Zhao,Shengbo Zhang,Bo Su,Kai Li,Cunlin Zhang
Artificial sweeteners, as a type of food additive, have vibration frequencies mostly concentrated in the terahertz (THz) band, which enables us to utilize THz technology to deeply analyze their molecular properties. To gain a more comprehensive understanding of the features of artificial sweeteners, this study specifically chose aspartame and acesulfame as representatives. Initially, we employed PXRD and Raman spectroscopy techniques to carry out a thorough examination and verification of the crystalline structure as well as the purity levels of these two synthetic sweeteners. Then, with the aid of Fourier transform infrared spectroscopy (FTIR) technology and terahertz time-domain spectroscopy (THz-TDS) system, the spectral characteristics of aspartame and acesulfame were precisely measured. Moreover, the crystal configurations of these two artificial sweeteners were simulated using solid-state density functional theory (DFT), and the simulation results were in good agreement with the experimental results, further validating the effectiveness of our research methods. Finally, using microfluidic chip technology, the THz spectral characteristics of aspartame and acesulfame in solution were determined, and were compared with their spectra in solid state. We found that the THz spectra of the two artificial sweeteners in solid and solution states have significant correlations. In addition, the research further elucidated that the THz spectrum of a substance dissolved in a solution exhibits a close correlation with its concentration within that solution. These findings provide new perspectives and value for our in-depth research on artificial sweeteners.
研究领域:
食品科学
·
分子光谱学
·
计算化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）