Amira Ouakkaf

• Université de Biskra

Investigations were conducted on activated carbons derived from the plentiful natural resource of Zizyphus lotus L seeds for the purpose of eliminating methylene blue from aqueous solutions. These activated carbons were synthesized through chemical activation using zinc chloride under various conditions, aiming to achieve carbons characterized by e...

The recycling of household waste through the anaerobic digestion of solid household waste into biogas represents one of the current topics that address the issues and environmental sustainability: renewable energy, depollution in urban ecology, methanogens in green chemistry. In this research, this contribution deals with the experimental digestion...

Agricultural wastes can be considered as suitable raw materials for activated carbon production, as activated carbon is considered as an economical adsorption material. Seeds from biomass of Ziziphus mauritiana Lam, grown in Algerian have been valorized for activated carbon production by the phosphoric acid, activation method with pyrolysis tempera...

The crystal structure of the title compound, 2C3H5N4O2⁺·SO4²⁻·2H2O, displays a three-dimensional framework in which mixed infinite chains [oriented parallel to (510) and (10)] inter­fere, forming tunnels extending parallel to the c axis. Inter­molecular O—H⋯O, N—H⋯O and O—H⋯N hydrogen bonds ensure the unity of the structure and generate centrosymme...

In the title compound, 2C6H7N2O2⁺·SO4²⁻·3H2O, there are two independent cations which are connected into N—H⋯O hydrogen-bonded dimers. In the crystal, O—H⋯O hydrogen-bonded sulfate–water sheets run parallel to (001) and are linked into a three-dimensional network via inter­molecular N—H⋯O and O—H⋯O hydrogen bonds through the 2-amino­nicotinium dime...

The crystal structure of the title compound, 2C5H6N3O2⁺·SO4²⁻·2H2O, displays a variety of N—H⋯O and O—H⋯O hydrogen bonds in which all potential donors and acceptors are involved. In the crystal, cations and anions are inter­connected, forming R3³(10) and R2²(8) ring motifs whereas the anions and water mol­ecules form R2³(10) rings, which develop in...

In crystal structure of the title compound, C5H6N3O2⁺·NO3⁻·H2O, inter­molecular N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds link the cations, anions and water mol­ecules into ribbons extending in [10]. Weak inter­molecular C—H⋯O hydrogen bonds further link these ribbons into sheets parallel to (3).