Pub Date : 2023-08-08DOI: 10.1080/01496395.2023.2245133
Supamittra Khampala, C. Umpuch
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.
摘要:以百香果皮为原料制备蒙脱土和天然果胶复合膜，用于去除水中的铅。气体吸附分析仪、场发射扫描电子显微镜、傅里叶变换红外光谱仪和织构分析仪是表征吸附剂的设备。在果胶膜中加入蒙脱土，得到了强度更高的复合膜。通过批量试验研究了接触时间、初始pH溶液、初始金属浓度和温度对吸附的影响。在最佳条件下，初始pH为5.0，初始金属浓度为100 mg/L，接触时间为150 min，温度为313 K时，铅的最佳吸收量为110.03 mg/g。实验数据符合Langmuir等温线和伪二阶方程。以0.1 M HCl为洗脱剂，吸附剂的铅离子去除率约为90.54%。结果表明，该复合膜可去除污染水中的铅离子，并可重复利用。
{"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}
Pub Date : 2023-08-02DOI: 10.1080/01496395.2023.2243031
N. A. Silva, S. Hiibel
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.
{"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}
Pub Date : 2023-08-02DOI: 10.1080/01496395.2023.2240496
V. K. Vashistha, R. Bala, A. Mittal, R. V. Pullabhotla
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.
依氟鸟氨酸(2-氟甲基- dl -鸟氨酸)是一种有效的不可逆抑制剂，可选择性靶向鸟氨酸脱羧酶，鸟氨酸脱羧酶是多胺生物合成途径中的关键酶。由于依氟鸟氨酸结构中缺乏显色基团，用紫外检测器对其进行检测是困难的。因此，用高效液相色谱法直接分离依氟鸟氨酸对映体是不可行的，需要通过手性高效液相色谱柱进行柱前衍生化。以(S)-α-乙基苄胺为手性衍生剂，建立了间接高效液相色谱法分离依氟鸟氨酸对映体的方法。用LiChrospher C18色谱柱(粒径5 μm, L × I)分离所得的非对映体。D. 25 cm × 4.6 mm)。流动相为乙腈和0.1% aq. TFA的混合物，以30 - 70%乙腈为线性梯度变化30 min，流速为1.0 mL min - 1，紫外检测波长为320 nm。通过改变流动相组成和流速对分离参数进行优化。结果表明，色谱分离在15 min内完成，依氟鸟氨酸对映体的分辨率值大于4.5。依氟鸟氨酸对映体的检测限和定量限分别为9.26 ng mL - 1和18.52 ng mL - 1。
{"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}
Pub Date : 2023-07-31DOI: 10.1080/01496395.2023.2240950
Taleb Zarei
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.
{"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}
Pub Date : 2023-07-31DOI: 10.1080/01496395.2023.2240952
Abdou Elkoudy, M. Essa, E. Ahmed, M. Soliman
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.
{"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}
Pub Date : 2023-07-31DOI: 10.1080/01496395.2023.2240491
R. Umadevi, J. Mispa
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.
{"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}
Pub Date : 2023-07-31DOI: 10.1080/01496395.2023.2240493
Sabrine Chebil, M. Bali
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.
{"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}
Pub Date : 2023-07-27DOI: 10.1080/01496395.2023.2240497
V. Telmore, Pranaw Kumar, P. Jaison
{"title":"HPLC separation of REE, U and Pu from uranium silicide fuel","authors":"V. Telmore, Pranaw Kumar, P. Jaison","doi":"10.1080/01496395.2023.2240497","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240497","url":null,"abstract":"","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"16 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85280336","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}
Pub Date : 2023-07-27DOI: 10.1080/01496395.2023.2241115
Hajer Chaaben, H. Cherif, H. Elfil
ABSTRACT The technical–economic analysis of the hemodialysis water purification process, which uses reverse osmosis with sand, softeners, and granular-activated carbon as pretreatment steps, shows that the permeate conductivity exceeds 25 µS cm−1 at 25°C due to softeners failure and that the cost of cubic meter of water produced is 2.4 €. The purification unit generated brine with a conductivity above 5 mS.cm−1 and it is discharged into the sewer. Several brine valorizations are proposed; brine recycling and simulation with IMS design software reveal that it is possible to recycle 0.2 m3.h−1 of brine and achieve 83% conversion rate with a good quality of permeate. The residual of the first reverse osmosis brine is diluted by the second reverse osmosis permeate and is to be used for toilet flushing, landscape irrigation, and sterilization steam production.
采用砂、软化剂和颗粒活性炭作为预处理步骤的反渗透血液透析水净化工艺的技术经济分析表明，由于软化剂失效，在25°C时渗透电导率超过25µS cm - 1，产生的立方米水成本为2.4欧元。净化装置产生的卤水电导率大于5ms。Cm−1，排入下水道。提出了几种卤水估值方法;利用IMS设计软件进行盐水回收模拟，结果表明，在渗透质量良好的情况下，回收0.2 m3.h−1的盐水可以达到83%的转化率。第一次反渗透盐水的残留物被第二次反渗透渗透物稀释，用于厕所冲洗、景观灌溉和消毒蒸汽生产。
{"title":"Reverse osmosis water purification and brine valorization in a Tunisian hemodialysis center","authors":"Hajer Chaaben, H. Cherif, H. Elfil","doi":"10.1080/01496395.2023.2241115","DOIUrl":"https://doi.org/10.1080/01496395.2023.2241115","url":null,"abstract":"ABSTRACT The technical–economic analysis of the hemodialysis water purification process, which uses reverse osmosis with sand, softeners, and granular-activated carbon as pretreatment steps, shows that the permeate conductivity exceeds 25 µS cm−1 at 25°C due to softeners failure and that the cost of cubic meter of water produced is 2.4 €. The purification unit generated brine with a conductivity above 5 mS.cm−1 and it is discharged into the sewer. Several brine valorizations are proposed; brine recycling and simulation with IMS design software reveal that it is possible to recycle 0.2 m3.h−1 of brine and achieve 83% conversion rate with a good quality of permeate. The residual of the first reverse osmosis brine is diluted by the second reverse osmosis permeate and is to be used for toilet flushing, landscape irrigation, and sterilization steam production.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"4 1","pages":"2166 - 2177"},"PeriodicalIF":2.8,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78666188","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}
Pub Date : 2023-07-27DOI: 10.1080/01496395.2023.2240495
R. Murali, S. Ganesh, Rahul Trika, N. Desigan, R. Rajeev, K. A. Venkatesan, K. Ananthasivan
{"title":"Adsorption kinetics and equilibrium performance of Di-n-butyl phosphate on XAD-4 and XAD-7 from alkaline medium","authors":"R. Murali, S. Ganesh, Rahul Trika, N. Desigan, R. Rajeev, K. A. Venkatesan, K. Ananthasivan","doi":"10.1080/01496395.2023.2240495","DOIUrl":"https://doi.org/10.1080/01496395.2023.2240495","url":null,"abstract":"","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"34 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79750778","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：