Batch and Column Operations for the Removal of Fluoride from Aqueous Solution Using Bottom Ash

Ramesh, Sivalingam; Gandhimathi, R.; Nidheesh, P.V.; Taywade, Manoj

doi:10.5755/j01.erem.60.2.1396

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Ramesh et al [ 228 ] investigated the ability to remove bottom ash fluoride in batch and column modes. Thus, 73.5% fluoride removal was achieved with a bottom ash dose of 70 mg/100 mL with an optimal contact time of 105 min.…”

Section: Industrial Waste By-product and Biomass As Fluoride Adsorbentsmentioning

confidence: 99%

Management of Solid Waste Containing Fluoride—A Review

2022

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Technological and economic development have influenced the amount of post-production waste. Post-industrial waste, generated in the most considerable amount, includes, among others, waste related to the mining, metallurgical, and energy industries. Various non-hazardous or hazardous wastes can be used to produce new construction materials after the “solidification/stabilization” processes. They can be used as admixtures or raw materials. However, the production of construction materials from various non-hazardous or hazardous waste materials is still very limited. In our opinion, special attention should be paid to waste containing fluoride, and the reuse of solid waste containing fluoride is a high priority today. Fluoride is one of the few trace elements that has received much attention due to its harmful effects on the environment and human and animal health. In addition to natural sources, industry, which discharges wastewater containing F− ions into surface waters, also increases fluoride concentration in waters and pollutes the environment. Therefore, developing effective and robust technologies to remove fluoride excess from the aquatic environment is becoming extremely important. This review aims to cover a wide variety of procedures that have been used to remove fluoride from drinking water and industrial wastewater. In addition, the ability to absorb fluoride, among others, by industrial by-products, agricultural waste, and biomass materials were reviewed.

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Section: Industrial Waste By-product and Biomass As Fluoride Adsorbentsmentioning

confidence: 99%

Management of Solid Waste Containing Fluoride—A Review

2022

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“…The most extreme monolayer adsorption limit of bottom ash adsorbent was identified as 16.26 mg/g at 303 K. From the column process, it was identified that the fluoride ions increase tends to increase in the bed height, because of an increase with the contact time. From the Thomas model, the author observed that the rate constant is 0.0619 l/min.mg and the adsorption limit was observed as 0.3714 mg/g.. From the Yoon Nelson model it was seen that 50% of adsorbate at time of 2140 minutes runs at the rate constant of 0.003 l/min [2] Saranya et al (2016) researched the defluoridation utilizing bio adsorbents, for example, banana peel, passion fruit peel and passion fruit seed. More prominent removal effectiveness was achieved by utilizing banana peel powder.…”

Section: Defluoridation Methodsmentioning

confidence: 99%

A Review on the Removal of Fluoride using Inexpensive Adsorbents

Radha¹,

T²

2019

IJERT

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Due to the weathering of rocks, effluents from industries and geochemical responses the fluoride interacts with the ground water. Precipitation, adsorption, ion-exchange, membrane process techniques helps to process defluoridation in water. Among these fluoride removal strategies, adsorption technique is direct, reasonable, and appropriate for drinking water treatment. A few adsorbents, for example, activated carbon and alumina, agricultural and industrial wastes etc., were endeavor the permissible range of fluoride availability in water by adsorption technique. Use of plant related materials and agricultural wastes as adsorbents are commonly involved in adsorption technique since these materials are easily available with biodegradable nature and also they are inexpensive materials. The principle reason for this literature survey is to give new thoughts regarding the defluoridation in aqueous solutions by adsorption method which was analyzed by numerous analysts. In this review paper, different adsorbents has been reviewed and their adsorption efficiency based on pH, initial fluoride concentration, temperature, contact time has been analysed. It is obvious from the review that the various adsorbents have demonstrated incredible capability of defluoridation. Be that as it may, at present there is an earnest requirement for the identification and improvement of progressively novel adsorbents which depends on economic and innovative aspects.

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“…Considering the fluoride removal from wastewaters, when the quality of solution obtained is not as important as in the case of drinking water, it is advisable to use inexpensive materials to remove fluorides, especially waste materials, so as not to increase the operating costs of the purification process. Various types of inexpensive sorption materials for fluoride removal, called low cost type sorbents, described in the literature which includes alum sludge [9,10], red mud [11,12], coal mining waste [13,14], spent catalyst [15,16], electrocoagulation sludge [17], coal fly and bottom ash derived from power station [18,19].…”

Section: A Zdunek Et Al / Desalination and Water Treatment 159 (201mentioning

confidence: 99%

The removal of fluoride from aqueous solutions using biomass ash derived from power industry

Zdunek¹,

Kołodyńska²,

Borowik³

et al. 2019

DWT

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a b s t r a c tThe ability of biomass ash to remove fluoride from aqueous solutions has been described. Seven samples of biomass ash from Polish power stations and combined heat and power plants using only biomass were tested as adsorbents for fluoride removal. After preliminary research, two of ash samples were chosen for further examination. Selected ash samples were examined in terms of the specific surface area and the pore size distribution. Their pH values of the point of zero charge were also determined. The examination of changes in the crystallographic phases of the sorbent before and after the sorption process was done using the XRD technique. Changes in ash samples before and after contact with the fluoride solution using the FTIR method were also analyzed. The effect of initial concentration of fluoride solutions, ash dose, contact time, temperature, pH, agitation rate and particle size of ash samples on fluoride removal efficiency has been examined. The percentage removal of the fluoride described as removal efficiency and the amounts of fluoride adsorbed per mass unit of ash vs. time and after reaching equilibrium was calculated. It was found that only in the case of one of the ash samples, CaF 2 was identified, and that probably has been precipitated as the result of that ash dissolution in water with the content of fluorides. The presence of fluorides in the residual solid phase bounded with compounds containing potassium, calcium sulphates and phosphates indicates that precipitation of CaF 2 is not the major mechanism responsible for fluoride removal. Therefore, an attempt was undertaken to describe the mechanism of the adsorption phenomenon. The kinetic profile of fluoride uptake was determined and the fitting to adsorption isotherm models was examined. The exact fitting to the pseudo-second-order model pattern of this model was confirmed for both of ash samples. It was found out that the fluoride adsorption process is well-described by Temkin isotherm plot.

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Batch and Column Operations for the Removal of Fluoride from Aqueous Solution Using Bottom Ash

Cited by 5 publications

References 23 publications

Management of Solid Waste Containing Fluoride—A Review

Management of Solid Waste Containing Fluoride—A Review

A Review on the Removal of Fluoride using Inexpensive Adsorbents

The removal of fluoride from aqueous solutions using biomass ash derived from power industry

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