A highly porous adsorbent capable of broad spectrum filtration of toxic industrial chemicals is necessary for many civilian and military applications. A carbon-silica composite material previously developed in our lab consists of two unique phases used to target low concentrations of NH₃ and SO₂, representative of basic and acid-forming gases. In this work, it is shown that the adsorption performance of this base CSC material can be further enhanced by functionalization with reactive metal sites. Several water-soluble metal salts at various concentrations are added to the CSC material as well as to MCM-41 via incipient wetness. Along with capacity measurements, the incorporation of metal salts on CSCs and MCM-41 is studied using crystallinity, microscopy, and porosity characterization techniques. Results show that successful, well-dispersed functionalization of metals on CSCs is possible while maintaining structural integrity. Capacity measurements show that ZnCl₂-CSC is the most effective material for NH₃ adsorption, while K₂CO₃-CSC is most effective for SO₂ adsorption. In order to efficiently target both adsorbates with one material, [30 wt% Cu(NO₃)₂]-CSC is identified as the best compromise, with NH₃ and SO₂ capacities of 4.0 and 0.45 mol/kg, respectively.