Synthesis and optimization of low-cost and high efficient zirconium-aluminium modified iron oxide nano adsorbent for fluoride removal from drinking water

2017 ◽  
Vol 2 (11) ◽  
pp. 716-724 ◽  
Author(s):  
Mrinal K Adak
Keyword(s):  
Drinking Water ◽  
Iron Oxide ◽  
Low Cost ◽  
Fluoride Removal ◽  
High Efficient ◽  
Nano Adsorbent

Adsorption of fluoride from aqueous solution using low cost adsorbent

2013 ◽  
Vol 13 (2) ◽  
pp. 238-248 ◽  
Author(s):  
R. Buamah ◽  
R. Asare Mensah ◽  
A. Salifu
Keyword(s):  
Drinking Water ◽  
Low Cost ◽  
Northern Ghana ◽  
Fluoride Removal ◽  
Order Kinetic ◽  
X Ray ◽  
Removal Capacity ◽  
Removal Technologies ◽  
High Aluminium ◽  
Model Water

High fluoride levels beyond the recommended value of 1.5 mg/L have been detected in several groundwater wells in Northern Ghana. This occurrence has led to the capping of many high yielding wells that hitherto have been major sources of drinking water for the populace in these arid areas. Most of the fluoride removal technologies applied in the area has not been versatile in effectively removing fluoride because of the varying water qualities. This study focused on screening adsorbents including high aluminium or iron containing bauxite ores, fabricated zeolite and activated Neem seeds for removal of fluoride from drinking water. The model water used was prepared by simulating the prevailing groundwater quality in Northern Ghana. The high aluminium bauxite ore (HABO) had the highest fluoride removal capacity. Within the pH range tested (5–7), the fluoride removal decreased with increasing pH. Occurrence of sulfate, chloride and nitrate in the model water reduced the fluoride removal capacity by 57, 24 and 38% respectively. The combined effect of these anions showed a 60% reduction in the fluoride removal capacity. The Freundlich and Langmuir isotherms gave an adsorption capacity (K) of 0.90 mg/g for the HABO. The adsorption kinetics fitted well the pseudo second-order kinetic model. The HABO is thermally stable and has kaolinite [Al2Si2O5(OH)5] and gibbsite [Al(OH)3] as its major components. X-ray fluorescence (XRF) and energy dispersive X-ray (EDX) results showed Al, Fe, Ti, O, C and Si as the predominant elements in the HABO.

Synthesis and properties of a magnetic core–shell composite nano-adsorbent for fluoride removal from drinking water

2014 ◽  
Vol 317 ◽  
pp. 552-559 ◽  
Author(s):  
Chang Zhang ◽  
Lin Chen ◽  
Ting-Jie Wang ◽  
Chao-Li Su ◽  
Yong Jin
Keyword(s):  
Drinking Water ◽  
Magnetic Core ◽  
Fluoride Removal ◽  
Core Shell ◽  
Shell Composite ◽  
Nano Adsorbent

Fluoride removal from aqueous solution by Ca-pretreated macrophyte biomass

2008 ◽  
Vol 5 (1) ◽  
pp. 68 ◽  
Author(s):  
Patricia Miretzky ◽  
Carolina Muñoz ◽  
Alejandro Carrillo-Chávez
Keyword(s):  
Aqueous Solution ◽  
Developing Countries ◽  
Drinking Water ◽  
Sorption Capacity ◽  
Aquatic Macrophyte ◽  
Low Cost ◽  
Isotherm Models ◽  
Fluoride Removal ◽  
Natural Material ◽  
Macrophyte Biomass

Environmental context. Fluoride concentrations in drinking water above 1.5 mg L–1 may be detrimental to human health. Many methods have been developed for removing excessive fluoride from drinking water. The use of an aquatic macrophyte biomass (Eleocharis acicularis) pretreated with Ca2+, a low-cost natural material, could be a technique for rural populations in developing countries that cannot afford treated or bottled water for daily consumption. Abstract. The use of an aquatic macrophyte biomass (Eleocharis acicularis) pretreated with Ca2+ as a low-cost natural material for the removal of fluoride from aqueous solution was studied. Batch experiments were carried out to determine fluoride sorption capacity and the efficiency of the sorption process under different pH, initial F– and macrophyte biomass doses. The experimental data showed good fitting to Langmuir and Freundlich isotherm models. The maximum F adsorption capacity was 0.110 mmol g–1 with an efficiency of 64.5% (pH 6.0; 5.0 g L–1 Ca-pretreated biomass). The binding of Ca2+ to the biomass increased the removal efficiency over 100%. The F– removal kinetics were rapid, less than 30 min, and best described by the pseudo-second order rate model. The rate constant, the initial sorption rate and the equilibrium sorption capacity were determined. These results may be useful for deprived rural population water supply schemes in Mexico and in other developing countries.

Fluoride removal from drinking water in Senegal: laboratory and pilot experimentation on bone char-based treatment

2011 ◽  
Vol 1 (4) ◽  
pp. 213-223 ◽  
Author(s):  
Sabrina Sorlini ◽  
Daniela Palazzini ◽  
Carlo Collivignarelli
Keyword(s):  
Drinking Water ◽  
Dental Fluorosis ◽  
Low Cost ◽  
Fluoride Concentration ◽  
Pilot Scale ◽  
Appropriate Technology ◽  
World Health ◽  
Fluoride Removal ◽  
Process Conditions ◽  
Bone Char

In Senegal there are four regions where fluoride concentration in drinking water exceeds the World Health Organization guide value of 1.5 mg/L. This generates permanent damages to the teeth (dental fluorosis) and to the skeleton (skeletal fluorosis). A safe, efficient, simple and low-cost effective defluoridation technique is not available yet and needs to be developed in order to prevent the occurrence of fluorosis. This experimental research was carried out in order to define an appropriate technology for fluoride removal from groundwater in Senegal. Batch tests and filtration tests at laboratory and pilot scale were carried out using animal bone char as adsorbent material for fluoride removal. Possible influencing parameters, such as specific ions in Senegalese drinking water, were investigated and the best process conditions were defined for the application in Senegal. The results attest to the efficacy of bone char in removing fluoride from Senegalese water: at pilot scale the mean specific adsorption was 2.7 mg F−/g of bone char, corresponding to a total treated volume of 4,000 L and a filter life of nearly three months.

scholarly journals Quality assessment of drinking water of Multan city, Pakistan in context with Arsenic and Fluoride and use of Iron nanoparticle doped kitchen waste charcoal as a potential adsorbent for their combined removal

2021 ◽  
Vol 11 (12) ◽  
Author(s):  
Iris Earnest ◽  
Rabia Nazir ◽  
Almas Hamid
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Iron Nanoparticles ◽  
Low Cost ◽  
Kitchen Waste ◽  
Industrial Activity ◽  
Iron Nanoparticle ◽  
Experimental Parameters ◽  
Nano Adsorbent ◽  
Kinetics And Thermodynamic

AbstractIn majority cities of Pakistan, ground water is the main source of drinking water supply in the taps. Studies from different areas of Pakistan reported the presence of arsenic (As3/5+) and fluoride (F−) in drinking water supplies and can be envisaged as a deep-rooted cause of daily exposure of these in humans. The present study was planned with three way approach, i.e., to assess drinking water quality in Multan city, a highly populated and industrial activity area; synthesis of nano-adsorbent for simultaneous, effective and low-cost removal of fluoride and arsenic and manage waste by utilization of kitchen waste for synthesis of the nano-adsorbent. Out of 30 samples collected, 80% and 73% samples were found exceeding maximum residual limits (MRL) for F− and As3/5+, respectively, while 53% samples had both As3/5+ and F− concentrations greater than MRL. All these water samples were then treated with prepared nano-adsorbent, i.e., iron nanoparticles doped kitchen waste charcoal after evaluating the optimized experimental parameters and application of adsorption, kinetics and thermodynamic models. The nano-adsorbent showed high removal efficacy 81–100% for F− and 13–100% for As3+.

Fe―Ti oxide nano-adsorbent synthesized by co-precipitation for fluoride removal from drinking water and its adsorption mechanism

2012 ◽  
Vol 227 ◽  
pp. 3-8 ◽  
Author(s):  
Lin Chen ◽  
Bo-Yang He ◽  
Shuai He ◽  
Ting-Jie Wang ◽  
Chao-Li Su ◽  
...  
Keyword(s):  
Drinking Water ◽  
Adsorption Mechanism ◽  
Fluoride Removal ◽  
Co Precipitation ◽  
Nano Adsorbent

scholarly journals Granulation of Fe–Al–Ce nano-adsorbent for fluoride removal from drinking water by spray coating on sand in a fluidized bed

2009 ◽  
Vol 193 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Lin Chen ◽  
Hai-Xia Wu ◽  
Ting-Jie Wang ◽  
Yong Jin ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Fluidized Bed ◽  
Spray Coating ◽  
Fluoride Removal ◽  
Nano Adsorbent

scholarly journals Granulation of Fe–Al–Ce hydroxide nano-adsorbent by immobilization in porous polyvinyl alcohol for fluoride removal in drinking water

2011 ◽  
Vol 209 (1-3) ◽  
pp. 92-97 ◽  
Author(s):  
Hai-Xia Wu ◽  
Ting-Jie Wang ◽  
Lin Chen ◽  
Yong Jin ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Polyvinyl Alcohol ◽  
Fluoride Removal ◽  
Nano Adsorbent
Sign in / Sign up

Export Citation Format

Share Document