Removal of Fluoride from Water by Adsorption onto Fired Clay Pots: Kinetics and Equilibrium Studies

Kofa, G. P.; Gomdje, V. Hambate; Telegang, C.; Koungou, S. Ndi

doi:10.1155/2017/6254683

Cited by 40 publications

(11 citation statements)

References 40 publications

(42 reference statements)

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“…A water bill of up to 14 ETB/m 3 is in place in Arsi Negelle, according to a study. 15 The cost of replenishing Nalgonda filtering material, which this local population in the research area cannot afford, is 1 probable cause for the increase.…”

Section: Discussionmentioning

confidence: 99%

Utilization of Community-Level Fluoride-Filtered Water and its Associated Factors in Dugda Woreda of East Shewa Zone, Oromia Region, Ethiopia

Almebo

Mangasha

Ashuro

et al. 2021

Environ�Health�Insights

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Background: Long-term consumption of water containing an excessive amount of fluoride causes dental and skeletal fluorosis. De-fluoridation options differ in terms of scale, efficacy, long-term viability, and user acceptance. Therefore, this study aimed to identify the challenges of using fluoride-filtered water and its associated factors among households. Methods: A cross-sectional study was conducted from April to May, 2018 among 405 randomly selected households in Dugda Woreda of Ethiopia Rift Valley East Shewa Zone, Oromia Region. A structured interviewer-administered questionnaire was used to collect the data. SPSS version 20 was used to enter and analyze the collected data. Logistic regression analysis was used to identify association between dependent and independent factors and explained by odds ratio with 95%CI. Results: A total of 228 (56.3%) households were found to utilize fluoride filtered water from community water supply schemes for drinking and cooking purposes. No family history of fluorosis (AOR = 44.4, 95%CI: 18.8, 104.74), monthly income of less than 1000 ETB (AOR = 0.03, 95%CI: 0.004, 0.23), good knowledge of community fluoride filter schemes (AOR = 5.93, 95%CI: 1.30, 26.9), and not afford to pay bill of ⩾0.50 ETB [AOR = 0.4, 95%CI: 0.20, 0.91] were factors significantly associated with utilization of community-level fluoride-filtered water. Conclusion: In this study, more than half of the households used fluoride filtered water. Family monthly income, affordability, presence of family members with the history of fluoride exposure, and knowledge about community fluoride filter schemes were factors significantly associated with utilization of community-level fluoride-filtered water.

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Section: Discussionmentioning

confidence: 99%

Utilization of Community-Level Fluoride-Filtered Water and its Associated Factors in Dugda Woreda of East Shewa Zone, Oromia Region, Ethiopia

Almebo

Mangasha

Ashuro

et al. 2021

Environ�Health�Insights

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“…Special attention is given for locally developed adsorbents that are promising raw materials for the removal of contaminants from water and wastewater (Asaithambi et al 2018). Hence, many studies are focused on adsorbents for fluoride removal from drinking water, such as an alum manufacturing process (Nigussie et al 2007), alumina in bauxite (Lavecchia et al 2012), activated alumina (Mulugeta et al 2015), CaCl 2 -modified Crocus sativus leaves (Dehghani et al 2018), fired clay pots (Kofa et al 2017), bark of Morinda tinctoria (Amalraj and Pius 2017), bark of the Vitex negundo plant (Suneetha et al 2015), lanthanum-impregnated bauxite (Vardhan and Srimurali 2016), lapsi seed stone (Joshi et al 2012), Al-Ce hybrid adsorbent (Liu et al 2010) and iron ore (Kebede et al 2016). However, researchers are still looking for practical and affordable adsorbents which can be applied at the commercial scale that leads to improving water supply quality in the regions of fluoridesaturated groundwater.…”

Section: Introductionmentioning

confidence: 99%

Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology

Fito

Said²,

Feleke³

et al. 2019

Environ Syst Res

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Background: Nowadays freshwater quality deterioration and quantity depletion are rapidly increasing across the globe. Especially fluoride polluted groundwater is causing a severe shortage of water supply and public health problem. Hence, this study was designed to investigate the performance of activated carbon produced from the Catha edulis stem for the removal of fluoride from aqueous solution. A C. edulis stem sample was collected from dumping sites of Addis Ababa City and its activation and carbonation processes were performed using H 2 SO 4 and a high temperature of 600 °C. The experimental study was designed to use a full factorial approach with a 3 3 which were the three factors with the three levels, namely pH (2, 7 and 9), contact times (60, 90 and 120 min) and adsorbent doses (0.5 g, 1.0 g and 1.5 g in 100 mL) at the initial fluoride concentration 30 mg/L which resulted in 81 experimental runs in triplicates. Results: The calculated maximum adsorption capacity of 18 mg/g was found under the Langmuir isotherm, whereas the Freundlich model (R 2 0.98) better fitted the experimental data, which indicated that the adsorption process was multilayer and cooperative. The maximum fluoride removal of 73% was observed at the optimum condition of adsorbent dose of 1.5 g in 100 mL contact time of 60 min and pH 2, whereas the predicted value of the fluoride removal of 69% was calculated under the same experimental condition. Fluoride removal was positive and strongly influenced by the adsorbent dose, whereas the adsorption pH was negatively and weakly impacted on removal. Conclusions: Generally, the performance of activated carbon for the removal of fluoride from aqueous solution is promising. The study also indicated that C. edulis activated carbon is a potential candidate for water treatment technology.

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“…Different types of adsorbent materials such as activated carbon [27], clay [28], fluorspar and quartz [29], fly ash [30], kaolinite [31], bone char [32], red mud [33], and bentonite [34] have been employed to find out which one is economically feasible for defluoridation. Kaolin clay and clay minerals are naturally plentiful, renewable, and environmentally sustainable [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Development of Kaolin Clay as a Cost-Effective Technology for Defluoridation of Groundwater

Ayalew

2020

International Journal of Chemical Engineering

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Excessive fluoride in potable groundwater is a serious health problem in rural areas of many developing countries. The presence of a small amount of fluoride in potable water is beneficial to human health, but a high amount (>1.5 mg/L) has adverse effects. The present study is aimed to prepare a new cost-effective adsorbent of kaolin clay that can be used as a valuable defluoridating agent. Characterization of the prepared adsorbent was carried out using DSC, FTIR, TGA, and XRD. Also, the surface area of the adsorbent was measured by BET analysis. The clay was activated with concentrated H2SO4, and the effects of various experimental parameters such as temperature (25, 40, 50, and 60°C), pH (2, 4, 6, and 8), particle size (<0.075, 0.075–0.15, and 0.15–0.30 mm), contact time (30, 60, 90, 120, and 150 min), and dose of the adsorbents (0.5, 1, 1.5, 2.0, and 2.5 g) were investigated using a batch adsorption method. The specific surface area of raw and activated clay was found to be 10.598 m2/g and 5.258 m2/g, respectively. The optimum fluoride removal by both adsorbents was obtained at pH 4, temperature 50°C, particle size 0.075 mm, and 60 min. In both adsorbents, the degree of fluoride removal was increased with a decrease in the particle size of the adsorbent and increased contact time and dosage of the adsorbent. In all parameters, adsorption by activated clay was better than raw kaolin clay for retaining fluoride. The obtained data were well fitted with Freundlich and Langmuir isotherm models.

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Removal of Fluoride from Water by Adsorption onto Fired Clay Pots: Kinetics and Equilibrium Studies

Cited by 40 publications

References 40 publications

Utilization of Community-Level Fluoride-Filtered Water and its Associated Factors in Dugda Woreda of East Shewa Zone, Oromia Region, Ethiopia

Utilization of Community-Level Fluoride-Filtered Water and its Associated Factors in Dugda Woreda of East Shewa Zone, Oromia Region, Ethiopia

Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology

Development of Kaolin Clay as a Cost-Effective Technology for Defluoridation of Groundwater

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