From the inception of the Coronavirus pandemic for the more than a year, it has now become exigent that the water supplies and wastewater be treated at its fullest efficiency as their nexus is quite ubiquitous in this domestic society. To design a robust wastewater treatment incurs a hefty cost, so the need of the hour is to resort towards treatment techniques which incurs minimal cost and adsorption techniques are one of them. Adsorption is a process where contaminants or compound in one phase gets attached or condensed to other phase, finally removing them. Adsorption by using activated carbon is a prominent method to remove the contaminants from water and wastewater remarkably, but still many researches shows the same as expensive and therefore, low-cost adsorbents extracted naturally is a best and cheapest alternative to remove the same. Numerous researches showed the potency of such low-cost adsorbents in removing heavy metals, dyes, etc. from the wastewater, but there is no literature available pertinent to the removal of parameters viz. COD, BOD, etc. from the wastewater. The present research aims to study the alteration of functional parameters viz. adsorbent dosages and pH in the removal of COD by comparing its efficiency supplemented with batch adsorption studies on the low-cost adsorbents viz. neem leaves and coconut husk.

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