Multiple coated graphite oxide – sand composites for fluoride removal in water

Preventing diseases is deemed to be the major goal of our century especially when an excessive fluoride in drinking water can cause dental fluorosis, bone stiffness, rheumatism and skeletal fluorosis. Fluoride uptake from groundwater implies a worldwide multidisciplinary effort in order to develop renewable, cheap, human friendly materials. Among other materials, hydrotalcites could be good candidates for an efficient fluoride removal from water due to their adsorption, anion exchange and reconstruction properties. These nanostructured materials were synthesized using co-precipitation method in controlled conditions. Presence of anions in the interlayer structure and morphological aspects were performed by FTIR and SEM techniques. Thermal treatment of hydrotalcites showed good adsorption capacities for water defluoridation mostly due to their tendency to restore the original structure.

Download Full-text

Changes in fluoride removal ability of chicken bone char with changes in calcination time

International Journal of Ceramic Engineering & Science ◽

10.1002/ces2.10034 ◽

2020 ◽

Vol 2 (2) ◽

pp. 83-91

Author(s):

Masanori Kikuchi ◽

Yuki Arioka ◽

Masamoto Tafu ◽

Mitsuteru Irie

Keyword(s):

Fluoride Removal ◽

Bone Char ◽

Calcination Time ◽

Chicken Bone

Download Full-text

Carbon phase-graphite oxide composites based on solid state interactions between the components: Importance of surface chemistry and microstructure

Carbon ◽

10.1016/j.carbon.2015.08.077 ◽

2015 ◽

Vol 95 ◽

pp. 580-588 ◽

Cited By ~ 7

Author(s):

Mykola Seredych ◽

Teresa J. Bandosz

Keyword(s):

Solid State ◽

Surface Chemistry ◽

Graphite Oxide ◽

Carbon Phase ◽

Oxide Composites

Download Full-text

Improving combustion characteristics of diesel and biodiesel droplets by graphite oxide addition for diesel engine applications

International Journal of Energy Research ◽

10.1002/er.3787 ◽

2017 ◽

Vol 41 (14) ◽

pp. 2258-2267 ◽

Cited By ~ 12

Author(s):

Jong Boon Ooi ◽

Jeevan Raj Rajanren ◽

Harun Mohamed Ismail ◽

Varghese Swamy ◽

Xin Wang

Keyword(s):

Diesel Engine ◽

Graphite Oxide ◽

Combustion Characteristics ◽

Oxide Addition

Download Full-text

L-Tyrosine Grafted Palladium Graphite Oxide and Sulfonated poly(ether ether ketone) based Novel Composite Membrane for Direct Methanol Fuel Cell

Chemical Engineering Journal ◽

10.1016/j.cej.2021.130235 ◽

2021 ◽

pp. 130235

Author(s):

Pradip Das ◽

Bishnupada Mandal ◽

Sasidhar Gumma

Keyword(s):

Fuel Cell ◽

Composite Membrane ◽

Graphite Oxide ◽

Direct Methanol Fuel Cell ◽

Ether Ether Ketone ◽

Poly Ether Ether Ketone ◽

Direct Methanol ◽

Ether Ketone ◽

Methanol Fuel Cell ◽

Sulfonated Poly

Download Full-text

Synthesis and Characterization of Reduced Graphene Oxide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.678.56 ◽

2013 ◽

Vol 678 ◽

pp. 56-60 ◽

Cited By ~ 16

Author(s):

Cherukutty Ramakrishnan Minitha ◽

Ramasamy Thangavelu Rajendrakumar

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Graphite Oxide ◽

High Performance ◽

Structural Changes ◽

Epoxy Group ◽

Xrd Analysis ◽

Si Substrates ◽

Reduced Graphene ◽

Reduced Graphite Oxide

Reduced graphene oxide is an excellent candidate for various electronic devices such as high performance gas sensors. In this work Graphene oxide was prepared by oxidizing graphite to form graphite oxide. From XRD analysis the peak around 11.5o confirmed that the oxygen was intercalated into graphite. By using hydrazine hydrate, the epoxy group in graphite oxide was reduced then the solution of reduced graphite oxide (rGO) is exfoliated. Raman spectrum of rGO contains both G band (1580 cm-1), D band (1350 cm-1). The remarkable structural changes reveals that reduction of graphene oxide from the values of ID/IG ratio that increase from 0.727 (GO) to 1.414 (rGO). The exfoliated reduced graphite oxide solution is spin coated on to the SiO2/Si substrates.

Download Full-text

Dental Fluorosis in Children from Aguascalientes, Mexico: A Persistent Public Health Problem

Water ◽

10.3390/w13081125 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1125

Author(s):

Osiel González Dávila

Keyword(s):

Public Health ◽

Health Problem ◽

Dental Fluorosis ◽

Tap Water ◽

Public Health Problem ◽

Normal Weight ◽

Fluoride Removal ◽

Public Elementary Schools ◽

Ordered Logistic Regression ◽

Guideline Value

This paper estimates the prevalence and severity of dental fluorosis among participants in the first wave of The Aguascalientes Longitudinal Study of Child Development (EDNA). The analytical sample includes 1052 children in 100 public elementary schools. Dental fluorosis is determined using the Modified Dean’s Index. There is a 43% general dental fluorosis prevalence, and the estimated Community Fluorosis Index is 0.99. Five municipalities report average groundwater fluoride concentrations above the official Mexican guideline value of 1.5 mg/L. In those municipalities, there is a 50% average dental fluorosis prevalence. An ordered logistic regression analysis indicates that obesity in participants increases the likelihood of suffering more severe dental fluorosis symptoms compared with normal-weight participants (OR = 1.62, p < 0.05). Households consuming tap water are more likely to have children suffering more severe dental fluorosis symptoms (OR = 1.63, p < 0.05). Children aged 8 years are more likely to present more severe dental fluorosis symptoms than their peers aged 7 years (OR = 1.37, p < 0.05). Dental fluorosis will persist as a public health problem in Aguascalientes State unless appropriate technologies for fluoride removal from water are installed and operated.

Download Full-text