King Fahd University of Petroleum and Minerals

King Abdulaziz City for Science and Technology

Bassam Shafiq Tawabini

Muataz Ali Atieh

Faraj Ahmad Abuilaiwi

Segun Biodun Adebayo

Amana Jemal Kedir

Tahar Laoui

Mazen Khaled

Según Biodun Adebayo

Fatai Abidemi Olabemiwo

Methods and compositions for the adsorptive removal of methyl tertiary butyl ether (MTBE) from contaminated water sources and systems. The compositions contain carbon fly ash doped with silver nanoparticles at specific mass ratios. Methods of preparing and characterizing the adsorbents are also provided.

Sonication method for making adsorbent composition

Method for making adsorbent fly ash composition

Method for adsorbing MTBE from an aqueous solution

Method for removing MTBE from a contaminated aqueous solution

A method for treating an MTBE-contaminated aqueous solution includes forming an adsorbent by treating fly ash with nitric acid and then doping the resultant acid-treated fly ash particles with AgNO3 and calcining. The adsorbent is used to contact an MTBE-contaminated aqueous solution to adsorb the MTBE and the adsorbent and to form a purified aqueous phase which is then separated from the adsorbent.

Method for treating an MTBE-contaminated aqueous solution

Methods and compositions for the adsorptive removal of methyl tertiary butyl ether (MTBE) from contaminated water sources and systems. The compositions contain acid-treated fly ash particles containing carbon, oxygen, and sulfur, and silver oxide nanoparticles having diameters in a range of 1-10 nm such that the silver oxide nanoparticles are present on the surface and in pore spaces of the acid-treated fly ash particles. The composition is in the form of particles having sizes in a range of 100 nm to 2.5 &#x3bc;m. Methods of preparing and characterizing the adsorbents are also provided.

Silver oxide nanoparticle-containing fly ash adsorbent

Compositions for the adsorptive removal of methyl tertiary butyl ether (MTBE) from contaminated water sources and systems. The compositions contain carbon fly ash doped with silver nanoparticles at specific mass ratios. Methods of preparing and characterizing the adsorbents are described. The composition may contain carbon acid-treated fly ash particles that consist of carbon, oxygen, and sulfur, and have silver oxide nanoparticles present on the surface and in pore spaces of the carbon acid-treated fly ash particles. The composition may be in the form of particles having sizes in a range of 100 nm to 2.5 &#x3bc;m with a BET surface area of at least 16.789 m/g, and contain the carbon acid-treated fly ash particles and the metal silver oxide nanoparticles at mass percentages of 50-90% and 10-50%, respectively.

MTBE-removal composition with acid-treated fly ash particles

A polyelectrolyte coated fly ash is described with a method of making and a method of using for the adsorption of a contaminant from a solution. The polyelectrolyte coated fly ash may be made by treating the oil fly ash with acid, and then contacting the product with a positive polyelectrolyte to create a first polyelectrolyte layer, and then with a negative polyelectrolyte to create a negative polyelectrolyte layer. The resulting polyelectrolyte coated fly ash quickly adsorbs contaminants from solution, and may be cleaned and reused.

Contaminant removal from water using polyelectrolyte coated fly ash

Methods and compositions for the adsorptive removal of methyl tertiary butyl ether (MTBE) from contaminated water sources and systems. The compositions are in the form of particles having sizes in a range of 100 nm to 2.5 &#x3bc;m and contain acid-treated fly ash doped with 1-10 nm silver oxide nanoparticles. The compositions may comprise 50-90 wt % acid-treated fly ash and 10-50 wt % silver oxide nanoparticles relative to a total weight. Methods of preparing and characterizing the compositions are also provided.

Doped silver nanoparticles on carbon fly ash for adsorption of methyl tertiary butyl ether

A process for decontaminating a contaminated aqueous liquid comprising methyl-tert-butyl ether (MTBE) involving pretreating the contaminated aqueous liquid with chlorine and/or a hypochlorous acid salt and irradiating the aqueous liquid with an ultraviolet wavelength to produce a radical molecular species that degrades the MTBE. MTBE is degraded into at least one degradation byproduct including tert-butyl formate (TBF), tert-butyl alcohol (TBA), acetone, carbon dioxide, and water.

Growing community of inventors

Dhahran, Saudi Arabia

Bassam Shafiq Tawabini