scholarly journals Functional activated carbon: from synthesis to groundwater fluoride removal

RSC Advances ◽  
2022 ◽  
Vol 12 (4) ◽  
pp. 2332-2348
Author(s):  
Soumia Bakhta ◽  
Zahra Sadaoui ◽  
Nabil Bouazizi ◽  
Brahim Samir ◽  
Ouiza Allalou ◽  
...  
Keyword(s):  
Surface Modification ◽  
Activated Carbon ◽  
Fluoride Removal ◽  
Fluoride Contamination

Conversion and surface modification of date stems to obtain a relevant adsorbent to remove fluoride contamination.

scholarly journals Sustainable Conversion of Agriculture and Food Waste into Activated Carbons Devoted to Fluoride Removal from Drinking Water in Senegal

2015 ◽  
Vol 8 (1) ◽  
pp. 8 ◽  
Author(s):  
Mohamad M. Diémé ◽  
Maxime Hervy ◽  
Saïdou N. Diop ◽  
Claire Gérente ◽  
Audrey Villot ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Public Health Problem ◽  
Calcium Content ◽  
Fluoride Removal ◽  
Carbonaceous Materials ◽  
Water Steam ◽  
Surface Areas ◽  
Fluoride Adsorption

<p>The objective of this study was to investigate the production of activated carbons (AC) from cashew shells, and millet stalks and their efficiency in fluoride retention. These agricultural residues are collected from Senegal. It is known that some regions of Sénégal, commonly called the groundnut basin, are affected by a public health problem caused by an excess of fluoride in drinking water used by these populations. The activated carbons were produced by a combined pyrolysis and activation with water steam; no other chemical compounds were added. Then, activated carbonaceous materials obtained from cashew shells and millet stalks were called CS-H<sub>2</sub>O and MS-H<sub>2</sub>O respectively. CS-H<sub>2</sub>O and MS-H<sub>2</sub>O show very good adsorbent features, and present carbon content ranges between 71 % and 86 %. The BET surface areas are 942 m² g<sup>-1</sup> and 1234 m².g<sup>-1</sup> for CS-H<sub>2</sub>O and MS-H<sub>2</sub>O respectively. A third activated carbon produced from food wastes and coagulation-flocculation sludge (FW/CFS-H<sub>2</sub>O) was produced in the same conditions. Carbon and calcium content of FW/CFS-H<sub>2</sub>O are 32.6 and 39.3 % respectively. The kinetics sorption were performed with all these activated carbons, then the pseudo-first equation was used to describe the kinetics sorption. Fluoride adsorption isotherms were performed with synthetic and natural water with the best activated carbon from kinetics sorption, Langmuir and Freundlich models were used to describe the experimental data. The results showed that carbonaceous materials obtained from CS-H<sub>2</sub>O and MS-H<sub>2</sub>O were weakly efficient for fluoride removal. With FW/CFS-H<sub>2</sub>O, the adsorption capacity is 28.48 mg.g<sup>-1 </sup>with r² = 0.99 with synthetic water.</p>

Surface modification by graphene oxide: An efficient strategy to improve the performance of activated carbon based supercapacitors

2017 ◽  
Vol 28 (12) ◽  
pp. 2285-2289 ◽  
Author(s):  
Weishi Du ◽  
Yaokang Lv ◽  
Hongliang Lu ◽  
Zaihua Chen ◽  
Dominic S. Wright ◽  
...  
Keyword(s):  
Surface Modification ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Efficient Strategy ◽  
Carbon Based

Surface modification of activated carbon for siloxane adsorption

2015 ◽  
Vol 83 ◽  
pp. 144-150 ◽  
Author(s):  
Huijuan Gong ◽  
Zezhi Chen ◽  
Yangmei Fan ◽  
Mengqun Zhang ◽  
Weili Wu ◽  
...  
Keyword(s):  
Surface Modification ◽  
Activated Carbon
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