Separation Science and Technology最新文献_第5页

Preparation of composite film-based montmorillonite clay for removal of lead from aqueous solution 复合膜基蒙脱土的制备及其除铅性能研究

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-08-08 DOI: 10.1080/01496395.2023.2245133

Supamittra Khampala, C. Umpuch

{"title":"Preparation of composite film-based montmorillonite clay for removal of lead from aqueous solution","authors":"Supamittra Khampala, C. Umpuch","doi":"10.1080/01496395.2023.2245133","DOIUrl":"https://doi.org/10.1080/01496395.2023.2245133","url":null,"abstract":"ABSTRACT This study aimed to prepare a composite film made of montmorillonite clay and natural pectin from passion fruit peels to remove lead from an aqueous solution. A gas adsorption analyzer, a field emission scanning electron microscope, a Fourier transform infrared spectrometer, and a texture analyzer are the devices for the adsorbent’s characterization. Adding montmorillonite to the pectin film produced the composite film, which has more strength. Batch tests were carried out to study the effects of contact time, the initial pH solution, the initial metal concentration, and temperature on adsorption. Under an optimal condition, a contact time of 150 min with an initial pH solution of 5.0, an initial metal concentration of 100 mg/L, and a temperature of 313 K results in the optimum amount of lead taken up at 110.03 mg/g. The experimental data follows the Langmuir isotherm and the pseudo-second-order equations. 0.1 M HCl used as the eluent can remove about 90.54% of the lead ions from the used adsorbent. The outcomes show that the composite film can remove lead ions from contaminated water and allow reuse.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"14 1","pages":"2254 - 2269"},"PeriodicalIF":2.8,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81482654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Membrane distillation for algal supernatant reuse from hydrothermal carbonization aqueous product 水热炭化水产物中藻类上清的膜蒸馏回用

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-08-02 DOI: 10.1080/01496395.2023.2243031

N. A. Silva, S. Hiibel

{"title":"Membrane distillation for algal supernatant reuse from hydrothermal carbonization aqueous product","authors":"N. A. Silva, S. Hiibel","doi":"10.1080/01496395.2023.2243031","DOIUrl":"https://doi.org/10.1080/01496395.2023.2243031","url":null,"abstract":"ABSTRACT With growing demand for more sustainable dairy manure management methods, a system involving hydrothermal carbonization (HTC), membrane distillation (MD), and algae cultivation for resource recovery from dairy manure was partially investigated in this study. Two algal species, Arthrospira maxima and Chlamydomonas reinhardtii, were cultivated on the hydrothermal aqueous product (HAP) of dairy manure, but the former requires a carbonate buffer for successful cultivation. The spent HAP after algae cultivation was treated using MD where the operational efficacy and distillate quality were assessed. Comparing the MD performance of the buffered HAP to the unbuffered HAP revealed the addition of the buffer decreased water flux and distillate quality, but cultivation with A. maxima reversed these effects and produced distillates with reduced COD, TN, and NH3 concentrations. C. reinhardtii cultivation resulted in increased distillate COD and NH3 concentrations compared to the unbuffered HAP. Fluorescence was used to broadly characterize the organic components of the feed and distillate streams. Regrowth experiments with A. maxima revealed the spent buffer can successfully be recycled, but fresh nutrients are required.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"67 1","pages":"2178 - 2188"},"PeriodicalIF":2.8,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84043967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a liquid chromatographic method for enantioseparation of Eflornithine using (S)-α-ethyl benzylamine as a chiral derivatizing agent 以(S)-α-乙基苄胺为手性衍生剂，建立了依氟鸟氨酸对映体分离的液相色谱方法

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-08-02 DOI: 10.1080/01496395.2023.2240496

V. K. Vashistha, R. Bala, A. Mittal, R. V. Pullabhotla

{"title":"Development of a liquid chromatographic method for enantioseparation of Eflornithine using (S)-α-ethyl benzylamine as a chiral derivatizing agent","authors":"V. K. Vashistha, R. Bala, A. Mittal, R. V. Pullabhotla","doi":"10.1080/01496395.2023.2240496","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240496","url":null,"abstract":"ABSTRACT Eflornithine (2-fluoromethyl-DL-ornithine) is a potent and irreversible inhibitor that selectively targets ornithine decarboxylase, a key enzyme in the polyamine biosynthesis pathway. Due to the lack of chromophoric moiety in the eflornithine structure, its detection via UV detector is difficult. Thus, direct high-performance liquid chromatographic (HPLC) separation of enantiomers of Eflornithine is not feasible, and pre-column derivatization is required for its determination through chiral HPLC columns. We developed an indirect HPLC method using (S)-α-ethyl benzylamine as a chiral derivatizing agent for the enantioseparation of Eflornithine. The diastereomers thus produced were then separated via LiChrospher C18 column (5 μm particle size, L × I. D. 25 cm × 4.6 mm). The mobile phase used was a mixture of acetonitrile and 0.1% aq. TFA and varied in linear gradients of 30–70% of acetonitrile for 30 min run at a flow rate of 1.0 mL min−1 and UV detection at 320 nm. The separation parameters were optimized by altering the mobile phase composition and flow rate. The findings revealed that the chromatographic separation was accomplished within 15 min, with resolution values greater than 4.5 for Eflornithine enantiomers. The detection and quantitation limits were 9.26 ng mL− 1 and 18.52 ng mL− 1 for Eflornithine enantiomers.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"74 1","pages":"2138 - 2144"},"PeriodicalIF":2.8,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79230117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of push valve centrifugal tray; a novel tray with pipe type downcomer 推阀离心塔板特点;一种带管式降水管的新型托盘

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-31 DOI: 10.1080/01496395.2023.2240950

Taleb Zarei

{"title":"Characteristics of push valve centrifugal tray; a novel tray with pipe type downcomer","authors":"Taleb Zarei","doi":"10.1080/01496395.2023.2240950","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240950","url":null,"abstract":"ABSTRACT The intention of providing this paper is to conduct an experimental investigation into the hydrodynamics of the push valve centrifugal tray, which has a new configuration, in order to retrofit the purpose of a stripper oil sweeting of Lavan oil manufacture. Experiments were performed on the commercial scale column by an air-water simulator rig. Two different pilot plants with 1.2 m and 3 m diameter have been used for experiments. Dry pressure drop, total pressure drop, and weeping data are presented on the commercial scale 1.2 m diameter column. The results compared with a sieve tray. Some correlations for the pressure drop and the weeping are presented. A pilot plant with a large diameter, 3 m, was also installed to predict the pressure drop with the exact characterization as the stripper column of Lavan oil manufacture to predict its pressure drop. The experiments were carried out in two different outlet weir heights, 0, 3 cm, and 2- and 4%-holes areas at various operating conditions. This article also introduced a new downcomer and tray design of the centrifugal tray. Experiments and industrial reports of this type of centrifugal tray show that it can be used in revamping and retrofit projects.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"44 1","pages":"2217 - 2227"},"PeriodicalIF":2.8,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74010302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calcium phosphates synthesized from coralline materials (Porites) and their application as a demulsifier for water–oil separation 以珊瑚为原料合成磷酸钙及其在水油分离破乳剂中的应用

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-31 DOI: 10.1080/01496395.2023.2240952

Abdou Elkoudy, M. Essa, E. Ahmed, M. Soliman

{"title":"Calcium phosphates synthesized from coralline materials (Porites) and their application as a demulsifier for water–oil separation","authors":"Abdou Elkoudy, M. Essa, E. Ahmed, M. Soliman","doi":"10.1080/01496395.2023.2240952","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240952","url":null,"abstract":"ABSTRACT Crude oil extraction is a hot topic concerning industrial applications. The extracted oil emulsions treatment with demulsifier is demanded for markets. Herein, we prepared a naturally based demulsifier comprising calcium phosphates from coralline materials. The XRD verifies successful formation of the intended calcium phosphate with characteristic peaks where the most intense peak at 30º for (211) plane matched well with card and former research. The SEM reveals the formation of the spherical, flowery shape. Zeta potential reaches −10 mV indicating reasonable stability of the demulsifier. For examining the separation efficiency using the bottle test, few drops of the demulsifer (~100 ppm) are enough for the separation at 55°C for 40 min in the water bath. Inherently, the separation initiates within few seconds. The extended results for the demulsifier are applied onto the ASH field (Borg Alarab, Egypt) and compared to other companies reports. The optimum separation efficiency for salt and water contents from crude oil reaches 9 PTB and 0.1%vol, respectively, after treatment by heating unit (Sigma package). The recommended values for these factors are 30 PTB and 2%vol. The efficiency of separation exceeds 99% for water and salt. This direction is significantly important for oil production and industry.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"28 1","pages":"2228 - 2239"},"PeriodicalIF":2.8,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90076918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sol-gel synthesis, physico-chemical characterization and investigations on ion exchange performance of atypical conducting polymer integrated composite cation exchangers 非典型导电聚合物集成复合阳离子交换剂的溶胶-凝胶合成、理化表征及离子交换性能研究

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-31 DOI: 10.1080/01496395.2023.2240491

R. Umadevi, J. Mispa

{"title":"Sol-gel synthesis, physico-chemical characterization and investigations on ion exchange performance of atypical conducting polymer integrated composite cation exchangers","authors":"R. Umadevi, J. Mispa","doi":"10.1080/01496395.2023.2240491","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240491","url":null,"abstract":"ABSTRACT Herein, an effective sol-gel strategy was utilized for the synthesis of atypical Polypyrrole/EDTA-Zirconium(IV) phosphate (PYZP) and Polypyrrole/EDTA-Zirconium(IV) iodate (PYZI) composite cation exchangers. The structural aspects, surface morphology, elemental composition and thermal constancy of the aforementioned composite cation exchangers were scrutinized through UV-Visible, FT-IR, XRD, SEM with EDAX, TEM and TGA studies. As-prepared conducting polymeric composite materials divulged not only excellent ion exchange capacity but also better thermal stability, electrical conductivity and notable selectivity toward Pb(II) ions as compared to their individual inorganic moieties. The improvement in ion exchange capacities (IEC) for distinct alkali metal ions of PYZP composite cation exchanger were Li+, 2.89; Na+, 3.15; K+, 3.34 meq/g and PYZI composite cation exchanger were Li+, 2.60; Na+, 2.86; K+, 3.21 meq/g, separately. It was concluded that PYZP composite acts as an excellent cation exchanger compared to PYZI composite due to the presence of ionogenic phosphate anions. The partition competency of the composite materials toward distinct metal ions in diverse solvent systems exposed the separation potentials of metal ions of systematic prominence from a specified binary combinations encompassing Cd(II) – Pb(II), Hg(II) – Pb(II), Cu(II) – Pb(II), Zn(II) – Pb(II), Ni(II) – Pb(II) and Fe(III) – Pb(II) metal ions. Subsequently, the conducting competency was examined through AC-Impedance spectroscopy.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"48 1","pages":"2145 - 2165"},"PeriodicalIF":2.8,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74225727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Treatment of urban wastewater by coupling planted filters with anodic oxidation process 植滤与阳极氧化耦合处理城市污水

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-31 DOI: 10.1080/01496395.2023.2240493

Sabrine Chebil, M. Bali

{"title":"Treatment of urban wastewater by coupling planted filters with anodic oxidation process","authors":"Sabrine Chebil, M. Bali","doi":"10.1080/01496395.2023.2240493","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240493","url":null,"abstract":"ABSTRACT The wastewater reuse strategy has the advantage of providing an effective resource to reduce water deficits, protect natural resources and alleviate future water shortages caused by climate change. In many arid and semi-arid regions, water reuse provides the majority of irrigation water, which is why appropriate treatment techniques are needed. These include planted filters, with restricted reuse of agricultural treated water. The main innovation is therefore to develop a new technique with reduced operating costs and increased efficiency for wastewater treatment that can be used in different sectors (household, industrial, washing centers…). The current work aimed to assess the performance of coupling planted Filters with anodic oxidation on platinum to remove contaminants and pathogens from urban wastewater effluents. To evaluate the efficiency of this hybrid process, urban sewage was first treated by filters planted with reeds, then by anodic oxidation on platinum using photovoltaic panels. Results showed that this treatment system allows a complete elimination of organic matter, ammonium nitrogen, and pathogenic bacteria. Removal rates were ~ 100% for COD, ~100% for BOD, ~100% for NH4 +, 93.24% for NO3 −, and ~100% for TC, FC, and FS. Due to the satisfactory performance, treated water can be reused without restriction in different sectors.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84974933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HPLC separation of REE, U and Pu from uranium silicide fuel 高效液相色谱法分离硅化铀燃料中的稀土、铀和铀

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-27 DOI: 10.1080/01496395.2023.2240497

V. Telmore, Pranaw Kumar, P. Jaison

引用次数: 0

Reverse osmosis water purification and brine valorization in a Tunisian hemodialysis center 反渗透净水和盐水增值在突尼斯血液透析中心

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-27 DOI: 10.1080/01496395.2023.2241115

Hajer Chaaben, H. Cherif, H. Elfil

引用次数: 0

Adsorption kinetics and equilibrium performance of Di-n-butyl phosphate on XAD-4 and XAD-7 from alkaline medium 磷酸二丁酯对碱性介质中XAD-4和XAD-7的吸附动力学及平衡性能

IF 2.8 4区工程技术

Separation Science and Technology Pub Date : 2023-07-27 DOI: 10.1080/01496395.2023.2240495

R. Murali, S. Ganesh, Rahul Trika, N. Desigan, R. Rajeev, K. A. Venkatesan, K. Ananthasivan

引用次数: 0