Journal of Water Chemistry and Technology最新文献

{"title":"Defluoridation of Water Using Aerosil-Modified Lignocellulosic Membranes","authors":"T. Yu. Dulneva,&nbsp;L. A. Deremeshko,&nbsp;A. I. Baranov,&nbsp;A. A. Troyanskii","doi":"10.3103/S1063455X24050023","DOIUrl":"10.3103/S1063455X24050023","url":null,"abstract":"<p>The country’s first tubular microfiltration membranes for water purification from various contaminants, made from an alternative natural material—wood,—was developed at the Dumansky Institute of Colloid and Water Chemistry of the National Academy of Sciences of Ukraine. The proposed procedure cuts significantly the costs of manufacturing membranes. They studied the main patterns of the defluoridation process of water using these lignocellulosic (wooden) membranes, which were modified with a dynamic layer of hydrophilic A-300 aerosil. The modification of the lignocellulosic membranes involved the preliminary formation of an additional retentive layer on their surface, due to the steric mechanism, in the form of a dynamic membrane. The research demonstrated the high efficiency of the water defluoridation process using a dynamic membrane made of SiO₂ particles, which retained fluoride ions (F^–) ions due to the electrostatic mechanism of their interaction. Specific conditions for forming the dynamic membrane included concentrations of modifying and membrane-supporting aerosil additives at 500 and 100 mg/dm³, respectively, with an operating pressure of 1.0 MPa and a formation duration of 120 min. The concentration of suspended SiO₂ particles in the permeate (turbidity) did not exceed the maximum permissible concentration (0.3 mg/dm³) in water. The modified lignocellulosic membrane could decrease the fluoride concentration in water to the permissible level for drinking water (0.7–1.5 mg/dm³) from an initial concentration of up to 7.5 mg/dm³ and a neutral pH at an operating pressure of 1.0 MPa. The membrane’s specific productivity was 0.024 m³/(m² h), due to significant pore blockage by SiO₂ particles.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"524 - 530"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physicochemical Investigations on the Removal of Fe(III) Metal Ions from Aqueous Media through Biosorption by Using Thermo-Chemically Modified Oyster Mushroom-Based Adsorbents","authors":"Abbas Khan,&nbsp;Muhammad Sharif Zada,&nbsp;Saima Farooq,&nbsp;Muhammad Humayun,&nbsp;Rozina Khattak,&nbsp;Natasha Anwar,&nbsp;Mohamed Bououdina,&nbsp;Dunaboyina Sri Maha Vishnu","doi":"10.3103/S1063455X24050011","DOIUrl":"10.3103/S1063455X24050011","url":null,"abstract":"<p>Herein, the cost-effective utilization of biosorption for toxic pollutant removal was investigated, with a specific emphasis on enhancing mushroom-based biosorbents for the decontamination of heavy metals-polluted aqueous environments. Firstly, Oyster mushrooms (<i>Pleurotus ostreatus</i>) collected from Bajaur, Khyber Pakhtunkhwa, Pakistan, underwent thorough cleaning, followed by air-drying for 2–3 weeks to produce a fine powder. The obtained powder was subjected to thermal modification through heating at 400°C/1 h, and a portion of it was additionally modified using potassium hydroxide (KOH). This process resulted in three distinct materials: untreated dried mushroom (AM), thermally modified mushroom (TMM), and chemically modified mushroom (CMM), and their chemical compositions were assessed using Fourier Transform Infrared (FTIR) spectroscopy. Subsequently, the resulting materials were employed as bioadsorbents for the elimination of toxic Fe(III) ions from aqueous media. Various experimental variables, including solution pH, temperature, contact time, pollutant concentration, and adsorbent amount were varied to investigate their impact on adsorption. Analysis using an atomic absorption spectrophotometer (AAS) demonstrated exceptional Fe(III) removal capacities of mushrooms, achieving a removal extent of 29.99 mg/g at 303 K, pH 6.0, and an adsorbent dosage of 0.1 g/L, resulting in a remarkable 99.97% removal efficiency. The type of adsorbent significantly affected the extent of adsorption. Furthermore, thermodynamic analysis revealed that adsorption was spontaneous and exothermic. The adsorption data were evaluated using Langmuir, Freundlich, and Temkin isotherms, with the pseudo-second-order reaction kinetics providing the best fit, suggesting that chemisorption predominates the surface adsorption of Fe(III). This study highlights the potential of mushroom-based biosorbents as eco-friendly and effective materials for purifying water contaminated with toxic pollutants.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"458 - 470"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Study of the Photocatalytic Degradation of Orange II Dye with Wastewater Using New Pyrochlore Solid Solutions Bi1.5Sb1.5Zn1–xCuxO7 as Photocatalysts","authors":"Zouaoui Kheira,&nbsp;Sellami Mayouf,&nbsp;Souad Bennabi,&nbsp;Merabet Fadia,&nbsp;Mekki Daouadji Cherifa","doi":"10.3103/S1063455X24050114","DOIUrl":"10.3103/S1063455X24050114","url":null,"abstract":"<p>In this present work, photocatalysts based on a new pyrochlore-type solid solution were prepared using the ceramic method at 1000°C. X-ray diffraction (XRD) analysis shows the existence of a solid solution with pyrochlore structure Bi_1.5Sb_1.5Zn_1–<i>x</i>Cu_<i>x</i>O₇ (0 ≤ <i>x</i> ≤ 1). Scanning Electron Microscope (SEM) images exhibited a slight difference in the external morphology of the samples. The UV-diffuse measurement revealed a change in the absorbance from the UV part for the zinc-rich compound to the visible part for the copper-rich compound. The Energy band gap values were between 3.15 and 1.84 eV. The photocatalytic activity of these prepared mixed oxides was studied for the photo-degradation of the dye Orange II (ORII) as an organic pollutant, in the presence of hydrogen peroxide (H₂O₂) as an oxidising agent, under sunlight irradiation, by varying different parameters such as the catalysts mass, the oxidant volume, the concentration of the pollutant and the pH. The experimental results obtained by UV-visible spectroscopy revealed that the removal efficiency of ORII increased with increasing the irradiation time for all tested photocatalysts. The pseudo-first-order kinetic model gave the best fit, with the highest correlation coefficients (<i>R</i>² = 0.99). The results of this study revealed the potential and various advantages of these new efficient photocatalysts.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"436 - 448"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of Activated Biochar from Wood Raw Materials for Water Treatment and Water Purification Applications","authors":"S. V. Grechanik,&nbsp;N. A. Klymenko,&nbsp;V. A. Bunetskyi,&nbsp;S. K. Smolin,&nbsp;O. V. Zabneva,&nbsp;L. V. Nevynna","doi":"10.3103/S1063455X24050047","DOIUrl":"10.3103/S1063455X24050047","url":null,"abstract":"<p>The production and application of activated biochar have demonstrated significant improvements in environmental conditions both locally and across Ukraine. Researchers have confirmed the viability of creating carbon adsorbents specialized for water purification from plant-based materials, streamlining the conversion of organic biopolymers into the final product. Enhancements to traditional pyrolysis technology included the implementation of wet cooling-activation, which facilitated the development of the porous structure in wood biochar. The study further compared the efficiency of various technological solutions by evaluating biochar samples across several criteria in water purification technology.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"512 - 523"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complex Treatment of Industrial Waste Water Containing Non-Ferrous Metals","authors":"R. Ye. Klischenko,&nbsp;R. D. Chebotar’ova,&nbsp;S. V. Remez","doi":"10.3103/S1063455X24050060","DOIUrl":"10.3103/S1063455X24050060","url":null,"abstract":"<p>In this paper, a method is proposed for the complex treatment of technical waste water containing essential concentrations of organomineral impurities including 1 g/dm³ of copper ions. Plasma treatment decreases the chemical oxygen demand of a solution by 17 times, the content of salts by 34%, and the copper and iron concentration by 20%. Electrodialysis decreases the total salt content from 3 to 0.2 g/dm³ and brings the copper and iron content to 8 and 3 mg/dm³, respectively. The destruction of organic substances contained in the water under plasma treatment results in a carbon-containing precipitate studied by physicochemical methods to determine structural and sorption characteristics. The FTIR spectrum of the carbon-containing precipitate indicates the presence of hydrophilic groups and a great amount of uncompensated active sites and free radicals, which can be used in sorption processes. The prospects of using the carbon-containing precipitate as a filler for the desalination chambers of an electrodializer under electrical field application is shown.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"506 - 511"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized Dewaxed Honeycomb Powder as a Promising and Eco-Friendly Alternative for the Removal of Malachite Green through Fixed Bed Column","authors":"Roshni Kumari,&nbsp;Md. Adnan Khan,&nbsp;Mithilesh Mahto,&nbsp;Md. Atif Qaiyum,&nbsp;Jhilirani Mohanta,&nbsp;Banashree Dey,&nbsp;Priyanka Priyadarsini Samal,&nbsp;B. Sambasivaiah,&nbsp;Soumen Dey","doi":"10.3103/S1063455X24050096","DOIUrl":"10.3103/S1063455X24050096","url":null,"abstract":"<p>A fixed-bed column study for the removal of malachite green (MG) from the aqueous phase was demonstrated using strategically dewaxed honeycomb powder (HCP). The removal efficiency was tested at several working parameters of the column, in particular, the column bed height, initial dye concentration, working pH, and the flow rate. Breakthrough curves have been plotted using the throughput volume versus concentration ratio for different parameters to identify the pathway of uptake. Thomas and bed depth service time (BDST) kinetic models have been applied to obtain the rate constants and the uptake capacity. The BDST model suggests an adsorption capacity of 196.28 mg L^–1. The column performance was seen to vary with solution pH and was found favourable at higher pH values. The adsorption rate decreases with increasing flow rate but increases with increasing concentration of the dye. Easy regeneration ensures multi-cycle operations. The mechanism of dye adsorption by HCP has been proposed as a blend of electrostatic attraction and weak forces. Henceforth, the use of HCP for the removal of MG in column mode may be extrapolated to serve as a promising agent in the treatment of dye-containing water and wastewater.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"471 - 479"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microencapsulation of Berberine to Develop a Natural Antibacterial Delivery System for Drinking Water","authors":"Gizem Şanlıtürk,&nbsp;Faisal Suleiman Mustafa,&nbsp;Mümtaz Güran,&nbsp;Şifa Doğan,&nbsp;Mustafa Gazi","doi":"10.3103/S1063455X24050035","DOIUrl":"10.3103/S1063455X24050035","url":null,"abstract":"<p>In this study, we aimed to fabricate a novel, completely natural antibacterial disinfectant material for environmental applications, such as treating drinking water. We created two different berberine−alginate (BerAlg) beads using the ionotropic gelation method, employing calcium and aluminium ions as cross-linkers. The materials were characterized using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), swelling, and release kinetic studies. Antibacterial activity was assessed through time-kill analysis. Among the four release kinetics models tested, the BerAlg bead formulation showed the best fit with the Korsmeyer−Peppas model, having the highest R2 value (0.9757). The longest release of berberine (Ber) was observed over a 4-h period. The time-kill assay results revealed that BerAlg beads were effective in killing for up to 7 h. In conclusion, these results demonstrate the promising potential of BerAlg beads as an antibacterial delivery system for disinfecting various liquid environments, such as drinking water.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"449 - 457"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of an Electrical Field on the Motion of Uncharged Impurities in Concentrated Fine Disperse Systems","authors":"L. L. Lysenko,&nbsp;N. O. Mishchuk,&nbsp;O. E. Shen,&nbsp;O. F. Rynda","doi":"10.3103/S1063455X24050072","DOIUrl":"10.3103/S1063455X24050072","url":null,"abstract":"<p>The diffusion of <i>o</i>-chlorotoluene (OCT), a hydrophobic organic compound, solubilized by means of the Triton X-100 surfactant from the region of local contamination into adjacent pure layers has been experimentally studied in a model kaolin based dispersion. The study is aimed at clarifying the factors influencing the motion of impurities in a dispersion medium with and without an electrical field. The theoretical analysis of obtained experimental data makes it possible to establish the effective diffusion coefficients of formed OCT/surfactant complexes in the pore space, which demonstrate the acceleration of the spread of contamination due to the influence of an electrical field. It has been shown that the diffusion coefficients of these complexes grow due to electroosmosis and hydrodynamic flows induced by it. Electroosmosis along negatively charged kaolin particles promotes the transport of impurities towards the cathode. At the same time, local narrowing of pores with a closed experimental cell leads to the pore solution hydrodynamic flows, which transport the impurities in the direction opposite to electroosmosis. Hence, due to a complicated interparticle space configuration, the electrical field actually results in pore solution mixing, which affects the character of the diffusion flows of impurities. Mixing may also be additionally intensified due to the heterogeneous charge of kaolin particles, which causes local changes in the direction of electroosmosis. At the same time, not only the fact of mixing as such is important, but also its specific features caused by different characters of electroosmotic and hydrodynamic flows and, correspondingly, by an sharp change in the direction of liquid flow near the surface of kaolin particles. As a consequence, the desorption of OCT/surfactant complexes from the surface of particles into the pore solution should be intensified and, correspondingly, the efficiency of their removal from the disperse systems should increase.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"427 - 435"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of Trace Cobalt in Water Samples by Ionic Liquid-Dispersive Liquid–Liquid Microextraction and Graphite Furnace Atomic Absorption Spectrometry","authors":"Yaqi Liu,&nbsp;Quan Han,&nbsp;Yanyan Huo,&nbsp;Xiaohui Yang","doi":"10.3103/S1063455X24050102","DOIUrl":"10.3103/S1063455X24050102","url":null,"abstract":"<p>A new method for the determination of ultra-trace cobalt by ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) and graphite furnace atomic absorption spectrometry (GFAAS) was developed. The trace cobalt was extracted by DLLME using the homemade reagent 2-(5-bromo-2-pyridylazo)-5-dimethylaminobenzenamine (5-Br-PADMA) as chelating agent, the ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate ([C₆mim][PF₆]) as extractant, and acetonitrile (CH₃CN) as dispersing agent, and then determined by GFAAS. The factors affecting the cobalt extraction efficiency: the type and volume of extraction solvent and dispersive solvent, the concentration and dosage of chelating agent, and the pH of the solution, were explored using the one-way rotation method. Under the optimized conditions, the cobalt concentration showed excellent linearity in the range of 0.05–1.50 ng/mL with the detection limit of 0.026 ng/mL; the relative standard deviation (RSD) for the determination of the cobalt standard solution with the mass concentration of 1.0 ng/mL was 4.83% (<i>n</i> = 9). From the slope of the linear regression equation for the determination of cobalt obtained after extraction compared with that before extraction, the enrichment factor of the method was found to be 62, and the spiked recoveries were in the range of 94.0–104.4%. The method is characterized by low detection limit, high sensitivity, and environment friendliness as well as convenient and rapid operation for the determination of trace cobalt in water samples. The results of this method are satisfactory.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"480 - 490"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Seasons on the Effluent Quality in SBR-Based Wastewater Treatment Plants","authors":"Indranil Dey,&nbsp;Seshagiri Rao Ambati,&nbsp;Prashant Navnath Bhos,&nbsp;Sridhar Pilli","doi":"10.3103/S1063455X24050059","DOIUrl":"10.3103/S1063455X24050059","url":null,"abstract":"<p>This study aims to investigate the effect of different seasons (where the temperature would be different) on the performance (phosphorous, nitrogen, and organic matter removal) of sequencing batch reactor (SBR) based wastewater treatment plants. The modified activated sludge model 2D (ASM2d) module, including the microbial kinetics is used to simulate the enhanced biological phosphorus removal (EBPR) SBR process and the temperature is chosen between 10 and 33°C. Influent data from two distinct wastewater treatment plants located in India and Europe are considered. The investigation of the kinetic variables is performed over a wide temperature range, and significant increases are seen as the temperature rises. The effluent parameters are within the government regulations. It is clear that an increase in temperature results in better effluent quality with reduced values of chemical oxygen demand (COD), biological oxygen demand (BOD), ammonium nitrogen and ammonium ions (NH₄), and total nitrogen (TN) and a slight increase in total phosphorus (TP) and total suspended solids (TSS). According to the current findings, as the temperature changes from low to high levels, the values of COD, BOD, TN, and NH₄ decreased by 2.50, 14.92, 5.80, and 9.90% respectively, for Indian data. There is a slight increase of 1.07% in the TSS profile. In conclusion, this study highlights the importance of considering the effect of different climatic conditions on the performance of SBR-based wastewater treatment plants.</p>","PeriodicalId":680,"journal":{"name":"Journal of Water Chemistry and Technology","volume":"46 5","pages":"491 - 505"},"PeriodicalIF":0.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}