A “Zero-Cost” Adsorbing Hydroxyapatite-Based Material from Amazon Fishery Waste for Water Remediation and Nutrient Release for Agriculture

This paper puts forward the use of “low-cost/low-end” hydroxyapatite-based adsorbing materials prepared from Tambaqui fish cleaning residues (i.e., bones) by grinding and/or thermal annealing. The nature raw and treatments practically resulted in a “zero-cost” adsorbent for atrazine pesticide Co2+ ion remediation an aqueous solution. Despite distinctive character two contaminants, all adsorptions were found to follow pseudo-second order kinetics Freundlich isotherm models. Pristine hydroxyapatite proved be more effective at low concentrations due interactions with collagen residues. Conversely, heat-treated demonstrated better adsorption performances cobalt removal organic hindering access surface. On other hand, lower affinities into faster efficient release water. different behavior terms phosphate shown three absorbents can exploited differential liberation targeted nutrients, high seed germination rates. Considering circular economic principles, waste-derived hydroxyapatites may potentially attractive removing ionic species, minimizing water pollution stemming heavy industry, their subsequent edible plants, enhancing agricultural availability mineral nutrients soil fertilization.