Removal of fluoride from multicomponent water solutions with the use of monovalent selective ion-exchange membranes

Grzegorzek, Martyna; Majewska-Nowak, Katarzyna; Ahmed, Arif Eftekhar

doi:10.1016/j.scitotenv.2020.137681

Cited by 97 publications

(27 citation statements)

References 45 publications

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“…Except for C85:S15, the removals were generally higher for ground water than for synthetic water. Co‐existing anions, and organic matter in groundwater generally compete with fluoride ions for adsorption sites, leading to a reduction in fluoride removal efficiency 39,40 . C85:S5:B10 and C85:S10:B5 had consistently higher fluoride removal compared to C85:S15.…”

Section: Resultsmentioning

confidence: 99%

“…Coexisting anions, and organic matter in groundwater generally compete with fluoride ions for adsorption sites, leading to a reduction in fluoride removal efficiency. 39,40 C85:S5:B10 and C85:S10:B5 had consistently higher fluoride removal compared to C85:S15. A higher FBC load meant more Fe content in the filter, increasing the number of active sites for fluoride removal.…”

Section: Fluoride Removal Efficiencymentioning

confidence: 88%

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Defluoridation of drinking water using a ceramic filter decorated with iron oxide‐biochar composites

Mandoreba

Gwenzi

Chaukura

2021

Int J Applied Ceramic Tech

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While effective defluoridation methods have been developed, most of them are expensive and difficult to apply at a household level. One safe, low-cost, decentralized water treatment method which is attracting research attention is the use of ceramic filters (CFs). Few studies have explored the use of biochar composites in CFs for defluoridation of water, with the bulk of them being based on batch and column experiments. The aim of this work was to develop, and evaluate a laboratory-scale, low-cost CF using clay, sawdust, and iron oxide-biochar (FBC) for fluoride removal in synthetic and real water samples. Three CFs were fabricated with varying FBC content (0%, 5%, and 10%). Water absorption, apparent porosity, and flow rate decreased with decreasing FBC content, while the impact strength increased with decreasing FBC content. The CFs reduced the fluoride concentration of both the ground water, and synthetic water to below the WHO recommended limit (1.5 mg/L). While further studies are required to optimize the CF, the results demonstrate that a CF decorated with FBC composites is effective for defluoridation of drinking water. K E Y W O R D Senvironmental remediation, iron-oxide biochar composite, porosity, water treatment How to cite this article: Mandoreba C, Gwenzi W, Chaukura N. Defluoridation of drinking water using a ceramic filter decorated with iron oxide-biochar composites.

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Section: Resultsmentioning

confidence: 99%

Section: Fluoride Removal Efficiencymentioning

confidence: 88%

Defluoridation of drinking water using a ceramic filter decorated with iron oxide‐biochar composites

Mandoreba

Gwenzi

Chaukura

2021

Int J Applied Ceramic Tech

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“…In their study, Ben Sik Ali Ali et al showed that the yield of the electrodialysis technique was 86.2% for defluoridation [33]. Another study reported that the fluoride removal efficiency of electrodialysis was from 80% to 90% [34].…”

Section: Dialysis and Electrodialysismentioning

confidence: 98%

Comparison of Water Defluoridation Using Different Techniques

Fadaei

2021

International Journal of Chemical Engineering

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Fluoride pollution in subsurface water is a significant problem for different nations across the world because of the intake of excessive fluoride caused by the drinking of the contaminated subsurface. Water pollution by flouride can be attributed to the natural and human-made agents. Increased levels of fluoride in drinking water may result in the irretrievable demineralization of bone and tooth tissues, a situation called fluorosis, and other disorders. There has long been a need for fluoride removal from drinking water to make it safe for human use. Among the various fluoride removal methods, adsorption is the method most popularly used due to its cheap cost, ease of utilization, and being a scalable and simple physical technique. According to the findings of this study, the highest concentration of fluoride (0.1–15.0 mg/L) was found in Sweden and the lowest (0.03–1.14 mg/L) in Italy. We collected the values of adsorption capacities and fluoride removal efficiencies of various types of adsorbents from valuable released data accessible in the literature and exhibited tables. There is still a need to find the actual possibility of using biosorbents and adsorbents on a commercial scale and to define the reusability of adsorbents to decrease price and the waste generated from the adsorption method. This article reviews the currently available methods and approaches to fluoride removal of water.

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“…Chloride, in the form of the Cl − ion, constitutes one of the major inorganic anions in coalbed water. It originates from the dissociation of salts, such as sodium chloride or calcium chloride, in water (Grzegorzek et al 2020). These salts, and their resulting chloride ions, come from coal seam minerals.…”

Section: Medium Diffusion In Coal Bedmentioning

confidence: 99%

Primary studies on the effect of coal bio-gasification in situ in the Qinshui basin

Xiao

Zhang

et al. 2021

J Petrol Explor Prod Technol

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Coal bio-gasification is one in situ coal gasification technology that utilizes the digestion of organic components in coal by methanogenic bacteria. It is not only an effective technology to enhance the recoverable reserves of coalbed methane, but also an important technical method to promote clean coal utilization. Relevant laboratory researches have confirmed the technical feasibility of anthracite bio-gasification. However, in the complex environment of coal bed, whether in situ gas can be yield with methanogenic bacteria needs to be verified by in situ experiments. In this study, a vertical well and a horizontal well were used in Qinshui basin to perform field experiments to confirm the technical industrial feasibility. The concentration of Cl− ion and number changes of Methanogen spp. were used to trace nutrition diffusion. Gas production changes and coalbed biome evolution were used to analyze technical implementation results. The trace data and biome evolution identified that: (1) The development of Methanoculleus spp. has a significant positive correlation with culture medium diffusion; (2) the structure of coalbed microbial community was significantly changed with the injection of nutrition, and the newly constructed methanogenic community was more suitable for fermentation of coal; and (3) the evolution of dominant microflora has further enhanced bio-gasification of coal. Gas production data showed that the gasification of coal lasted 635 and 799 days and yielded 74,817 m3 and 251,754 m3 coalbed methane in Z-159 and Z-7H wells, respectively. One nutrition injection in coalbed achieved an average of 717 days of continuous gas production in experimental wells. Results confirmed that coalbed methane enhancement with bio-gasification of coal is a potential technology to achieve the productivity improvement of coalbed methane wells. And the findings of this study can help to further understand the mechanism of in situ coal bio-gasification and provide theoretical support for the development of biomining of coal.

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Removal of fluoride from multicomponent water solutions with the use of monovalent selective ion-exchange membranes

Cited by 97 publications

References 45 publications

Defluoridation of drinking water using a ceramic filter decorated with iron oxide‐biochar composites

Defluoridation of drinking water using a ceramic filter decorated with iron oxide‐biochar composites

Comparison of Water Defluoridation Using Different Techniques

Primary studies on the effect of coal bio-gasification in situ in the Qinshui basin

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