The present invention relates to an effective use of waste PET (polyethylene terephthalate) bottles derived metal-organic-frameworks (MOFs) as an efficient  chemosensing tool for rapid detection of deadly toxic analyte like chloroform (detection limit: 0.77 parts per trillion) along with removal of assorted spilled organo- solvents (Benzene, Chloroform, Toluene etc.) and other oily substances (Diesel, kerosene etc.) from surface/sub-surface water bodies. In particular, the present  invention relates to the cost-effective monomeric conversion of waste PET bottles in a cost-effective way followed by use of that monomeric product to prepare porous  polymeric network which would be ultimately used as a chemosensing tool/stationary phase sorbent material for detection/removal of the deadly water contaminants  respectively. The invented polymeric product may be utilized for trace level recognition followed by mitigation of toxic contaminant like CHCl3 from water bodies in  order to purify the intoxicated water resources which will give rural people a sustainable life. Additionally, integration of activated charcoal together with the as-synthesized MOFs produces a low cost, aqua-stable composite adsorbent materials for showing stationary phase sorption behavior towards scavenging of the spilled  water contaminants like diesel. Thereby, the invented product helps to reduce the burden of waste PET bottles followed by conversion of pollutant enriched grey water  into potable one emphasizing initiatives like 'Swachh Neer Mission', 'Swasth Bharat Mission' etc.