Fluoride adsorption from aqueous solution using activated carbon obtained from KOH-treated jamun (Syzygium cumini) seed

Araga, Ramya; Soni, Shantanu; Sharma, Chandra Shekhar

doi:10.1016/j.jece.2017.10.023

Cited by 92 publications

(21 citation statements)

References 25 publications

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“…[1][2][3][4][5] In contrast, it is noted that the longterm intake of higher quantities of uoride will pose adverse health effects to humans, leading to a variety of diseases including skeletal uorosis, osteoporosis, arthritis, brittle bones, cancer, infertility, thyroid disorder, and even interference with DNA synthesis. [6][7][8][9][10] Fluorosis, associated with elevated uoride concentrations in drinking water, has been reported in various countries around the world such as India, China, Tanzania, Mexico, Argentina, and South Africa. 8 Dental uorosis occurs in 10% of children exposed to 4 mg L À1 uoride in their drinking water, where skeletal uorosis occur when the uoride concentration is greater than 10 mg L À1 .…”

Section: Introductionmentioning

confidence: 99%

“…9 Furthermore, a study published in Environmental Health Perspectives in 2012 found that a high level of uoride in drinking water has potential in lowering IQ levels in children. 6,10 In Malaysia, the recommended level of uoride in the public water supply is 0.4 to 0.6 mg L À1 . However, it was found that 7% of the population in Malaysia are exposed to a public water supply which exceeded the upper limit of the recommended uoride level which is more than 0.6 ppm.…”

Section: Introductionmentioning

confidence: 99%

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Adsorptive, kinetics and regeneration studies of fluoride removal from water using zirconium-based metal organic frameworks

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorptive, kinetics and regeneration studies of fluoride removal from water using zirconium-based metal organic frameworks

et al. 2020

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“…Adsorption Mechanism : The attainment of highest fluoride adsorption onto the prepared carbon/CNT composite at low pH condition can be explained by the following equations which have been widely reported for the fluoride adsorption onto biomass‐based charcoals

‐ C O H + {normalH}^{+} \leftrightarrow C O {normalH}_{2^{+}}

‐ C O {normalH}_{2^{+}} + {normalF}^{-} \leftrightarrow C F + {normalH}_{2} O

…”

Section: Resultsmentioning

confidence: 97%

Coconut‐Shell‐Derived Carbon/Carbon Nanotube Composite for Fluoride Adsorption from Aqueous Solution

Araga

Kali

Sharma

2019

CLEAN Soil Air Water

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Devastating effect of fluoride in drinking water on human health is a great concern and defluoridation is essential to make groundwater suitable for drinking. The aim of this study is to evaluate the dissolved fluoride removal efficiency of a novel and low-cost carbon/carbon nanotube (CNT) composite under batch conditions. CNTs are coated on the coconut-shell charcoal surface at 450 C by using plasma-enhanced chemical vapor deposition. Thereafter, processed charcoal samples are ball milled and used for the fluoride removal from aqueous medium. The amount of fluoride removal is found to be %65% of the initial concentration of 4.4 mg L À1 in 3 h contact time at the adsorbent dose of 10 g L À1 . The linear forms of three isotherm models (Langmuir, Freundlich, and Temkin) and two kinetic models (pseudofirst order and pseudo-second order) are applied to the adsorption data to determine the best fit for equilibrium expression. Isotherm data fit the Langmuir model while the adsorption kinetics is represented by the pseudosecond-order kinetic model. The fluoride adsorption process onto prepared carbon/CNT composite occurred spontaneously (ΔG ¼ À1.656 kJ mol À1 ) in an endothermic nature (ΔH ¼ 11.07 kJ mol À1 ) with increased randomness (ΔS ¼ 41.69 J mol À1 K À1 ). To validate the performance further, the asprepared adsorbent is successfully used to treat groundwater samples with excess fluoride concentration collected from Nalgonda district, Telangana, India.

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“…According to the Indian standard code of drinking water IS 10,500:2012, the acceptable and permissible limit for fluoride in drinking water is 1 mg/L and 1.5 mg/L. Till today, even there is an abundance of defluoridation techniques present in the world but, researchers are struggling to combat the epidemic disease of fluorosis and looking for efficient and cheap fluoride removal technique [1,3,14,33,35,38]. In India, elevated fluoride levels account for more than 200 districts in 22 states.…”

Section: Introductionmentioning

confidence: 99%

Assessment of pine cone derived activated carbon as an adsorbent in defluoridation

2020

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A vast population of the world is vulnerable to fluoride contaminated drinking water intake, and there are various defluoridation techniques available to date as well. But the removal of fluoride is still a challenge, especially in remote rural areas because available techniques require proper supervision and equally, ineffective due to economic issues and electricity crisis. Among all methods of defluoridation, adsorption methods are found better to carry out at the community and household level but sometimes demanded a replacement of commercial activated carbon (CAC) due to economic issues and less availability in remote areas. Hence keeping this in mind, the present study assessed the pine cone activated carbon (PCAC) as adsorbent material in the defluoridation that is easy to prepare like any other agriculture-waste material. The activated carbon was prepared using KOH as an impregnating agent for activation of pine cone by pyrolysis technique at 800 °C and has been analyzed for various parameters in the fluoride removal viz. contact time, dose variation, pH and initial fluoride concentration. The maximum adsorption capacity of fluoride on pine cone activated carbon was found 1.34 mg/g of initial fluoride concentration (2-12 mg/L) at pH (6.8-7.0) with a contact period of 45 min. Also, a comparison has been made between Pine Cone Activated Carbon (PCAC) with Commercial Activated Carbon (CAC) based on obtained results. It has been suggested that Pine cone activated carbon is efficient as well as cheap adsorbent and can be used for the removal of fluoride from drinking water in rural areas.

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Fluoride adsorption from aqueous solution using activated carbon obtained from KOH-treated jamun (Syzygium cumini) seed

Cited by 92 publications

References 25 publications

Adsorptive, kinetics and regeneration studies of fluoride removal from water using zirconium-based metal organic frameworks

Adsorptive, kinetics and regeneration studies of fluoride removal from water using zirconium-based metal organic frameworks

Coconut‐Shell‐Derived Carbon/Carbon Nanotube Composite for Fluoride Adsorption from Aqueous Solution

Assessment of pine cone derived activated carbon as an adsorbent in defluoridation

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