“…Low-cost adsorbents require little processing and found abundantly in nature. The various low cost adsorbents have been investigated by researchers like agricultural waste, 4 banana peel, 5 Ficus carica, 6 apple peels, 7 apricot stone, 8 bagasse fly ash, 9 peat, 10 abundant weeds, 11 walnut shell, 12 soya waste, 13 hen feather, 14 oil palm midrib, 15 sugarcane baggase, 16 Typha angustifolia, 17 natural zeolites, 18 sewage sludge, 19 etc. The objective of the present work is to study the adsorption of congo red (CR), methylene blue (MB) and crystal violet (CV) on dead biomass of weeds Parthenium hysterophorus and Saccharum munja.…”