A Simple Method for Synthesis of Triamine-SiO2Material toward Aqueous Nitrate Adsorption

Abstract

This study describes a facile route for preparation of mesoporoussilica at ambient condition using cheap and available commercial SiO2precursor. The mesoporous material was then loaded with amine (Amine-P-SiO2) and applied for nitrate removal in aqueous solution. The materials were characterized by XRD, TGA, FTIR, andSEM to explore the properties. Effects of pH, nitrate concentration, adsorbent dosage, and temperature on the nitrate adsorption capacity were investigated. Amine-P-SiO2material was superior to commercial adsorbent (Akualite A420) for nitrate adsorption with capacity reaching 32.5 mg/g and relatively stable after 10 cycles of adsorption-desorption. Moreover, the adsorption follows Langmuir model, proving that this chemical adsorption could effectively remove nitrate from aqueous solution for water and advanced wastewater treatment applications.

Keywords

• Triamine
• Mesoporous silica
• Amine-P-SiO2
• Aqueous nitrate adsorption