(2020) Sulfur Dioxide (SO 2) Detection Using Composite of Nickel Benzene Carboxylic (Ni 3 BTC 2) and OH-Functionalized Single Walled Carbon Nanotubes (OH-SWNTs).

Most of the commercial manufacturers of soap and detergents are still using sodium tripolyphosphate and trisodium phosphate as the builder material which results into eutrophication through laundry. Phosphate mainly originates from detergents and affects the aquatic ecosystem severely. This may increase decomposer organisms that require oxygen, which can deplete the amount of oxygen dissolved in the water. To remedy this, many leading detergent manufacturers currently use zeolite A as the builder material which has proven to be a better substitute for phosphatic additives. Zeolite A is a threedimensional crystalline aluminosilicate resin having a high exchange capacity towards ions that cause water hardness. In spite of this tremendous potential, the high cost of zeolite A has limited its effective use in detergents. The specific objectives of this study were to synthesize zeolite A resin in a more economically viable fashion using waste material, a composite ash, which is the post-combustion residue of rice husk blended with coal, and to formulate an eco-friendly phosphate-free detergent powder using the same. The studies also focused on evaluating its detergency action by analyzing moisture content, foam height, surface tension, tea/coffee stain test along, and alcohol solubility. The results show that the synthesized detergent has comparable detergency to two known commercial brands of detergent. This economical synthesis combined with the exceptional parameters of zeolite A resin, such as fine particle size, high exchange capacity, inert nature, and antiredeposition properties, makes this detergent an elite and cost-effective product.

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