Adsorption of Fluoride from Aqueous Solution and Groundwater onto Activated Carbon of Avocado Seeds

Tefera, Nurelegne; Mulualem, Yibeyin; Fito, Jemal

doi:10.1007/s41101-020-00093-7

Cited by 36 publications

(8 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6 is plotted for various adsorbent concentrations at 1 hour contact time for neem stem charcoal adsorbent initial fluoride concentration 2 PPM and 4 PPM. It shows a decrease in efficiency concerning concentration increase [40]. Neem stem charcoal has the highest removal efficiency, and neem powder has the lowest [41].…”

Section: Experiments Using Stock Solutionmentioning

confidence: 99%

Investigation on Efficient Removal of Fluoride from Ground Water Using Activated Carbon Adsorbents

Chukka

Natrayan

Reddy

et al. 2022

Adsorption Science & Technology

View full text Add to dashboard Cite

Groundwater seems to be the most significant natural source of potable water for millions of individuals. Fluoride pollution in groundwater is a big problem in Tamil Nadu’s Dharmapuri area. According to a survey done in a school in the Dharmapuri area, dental and skeletal fluoroses afflict almost 75% of school kids. There is no proven or recommended cost-effective strategy for lowering fluoride levels in the home. This study proposes cost-effective and efficient natural treatment approaches for lowering fluoride levels. In this experiment, fluorides in groundwater are eliminated to a suitable extent utilizing natural adsorbents. Neem stem charcoal (activated carbon), neem leaves powder, dry coconut husk, coconut shell charcoal (activated carbon), and rice husk powder are natural adsorbents. The adsorbents were utilized at different concentrations until the best concentration was found. The ideal concentration removes the bulk of fluoride from groundwater and delivers adequate treatment. People could adopt this cost-effective procedure because just a few components are enough. As per the Bureau of Indian Standards, the concentration should not exceed 1.5 ppm, and it should not be lesser than 1 ppm; keeping this in mind, the neem stem charcoal which has higher efficiency in removing fluoride can be used in extensive environments, but in this selected place, it reduces the concentration even below 1 ppm, which relays below the standard level. As a result, adopting these procedures helps prevent dental and skeletal fluoroses, which is common among young people.

show abstract

Section: Experiments Using Stock Solutionmentioning

confidence: 99%

Investigation on Efficient Removal of Fluoride from Ground Water Using Activated Carbon Adsorbents

Chukka

Natrayan

Reddy

et al. 2022

Adsorption Science & Technology

View full text Add to dashboard Cite

show abstract

“…The United Nations suggested 17 goals of development which were framed for global nations toward acquiring sustainability. Goal 6 is the water availability, quality, and affordability of basic sanitation for all mankind [ 2 ]. However, water is being polluted due to various point and non-point sources [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Cr (VI) removal from aqueous solution with activated carbon derived from Eichhornia crassipes under response surface methodology

2023

Self Cite

View full text Add to dashboard Cite

Tannery industries’ effluent contains a high concentration of Cr (VI) which has the potential to affect the environment and public health. Therefore, this study aimed to investigate the optimization of Cr (VI) adsorption by activated carbon (AC) derived from Eichhornia crassipes from an aqueous solution. The adsorbent was activated with dilute sulfuric acid followed by thermal activation. AC was characterized using proximate analysis, SEM, FTIR, X-ray diffraction, and the BET method. The Cr (VI) removal optimization process was performed using a central composite design under the response surface methodology. The proximate analysis showed that the moisture content, volatile matter, ash content, and fixed carbon of the activated carbon were 5.6%, 18.2%, 14.4%, and 61.8% respectively. The surface areas of the Eichhornia crassipes before activation, after activation, and after adsorption were 60.6 g/m2, 794.2 g/m2, and 412.6 g/m2 respectively. A highly porous structure with heterogeneous and irregular shapes was observed in the SEM micrograph. In the FTIR analysis, different peaks are indicated with various functional groups. The intensity of XRD peaks decreased as 2 theta values increased, which indicates the presence of an amorphous carbon arrangement. The point of zero charge (pHpzc) of the activated carbon was found to be 5.20. A maximum Cr (VI) removal of 98.4% was achieved at pH 5, contact time 90 min, adsorbent dose 2 g, and initial Cr (VI) concentration of 2.25 mg/L. Statistically significant interactions (P < 0.05) were observed between the initial Cr (VI) concentration and adsorbent dose as well as the initial Cr (VI) concentration and contact time. Langmuir adsorption isotherm fitted the experimental data best, with an R2 value of 0.99. The separation constant (RL) indicates that the adsorption process is favorable. The kinetic experimental data were best fitted with the pseudo-second-order model with an R2 value of 0.99 whereas the adsorption rate is controlled by intraparticle and extragranular diffusion processes. Generally, the AC has the potential to be a strong adsorbent candidate for wastewater treatment at the industrial level.

show abstract

“…e study by Tefera et al illustrated that the maximum adsorption yield was found to be 86% in 60 min using activated carbon of avocado seeds [59]. Another study reported that a maximum fluoride removal of 85.4% was observed using activated carbon of Crocus sativus leaves at the best state of primary fluoride level of 6.5 mg/L and exposure time of 70 min [60].…”

Section: Bionanocomposites and Carbon-based Adsorbentsmentioning

confidence: 97%

Comparison of Water Defluoridation Using Different Techniques

Fadaei

2021

International Journal of Chemical Engineering

View full text Add to dashboard Cite

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.

show abstract

Adsorption of Fluoride from Aqueous Solution and Groundwater onto Activated Carbon of Avocado Seeds

Cited by 36 publications

References 54 publications

Investigation on Efficient Removal of Fluoride from Ground Water Using Activated Carbon Adsorbents

Investigation on Efficient Removal of Fluoride from Ground Water Using Activated Carbon Adsorbents

Optimization of Cr (VI) removal from aqueous solution with activated carbon derived from Eichhornia crassipes under response surface methodology

Comparison of Water Defluoridation Using Different Techniques

Contact Info

Product

Resources

About