Protein wastes (feathers, goat hair) and cellulosic wastes (corn cob, coconut husks) were collected and washed with detergent solution, thoroughly rinsed and sun dried for 2 days before drying in an oven, and then ground. One-half of ground material was carbonized at a maximum temperature of 500°C after mixing with H2SO4. The carbonized parts were pulverized; both carbonized and uncarbonized sorbents were sieved into two particle sizes of 325 and 625μm using mechanical sieve. Sorbents of a given particle size were packed into glass column.Then, textile wastewater that had its physicochemical parameters previously determined was eluted into each glass column and a contact time of 60 and 120 mins was allowed before analysis. Results showed 48.15-99.98 percentage reduction of NO3-, EC, Cl-, BOD, COD, DO, TSS, and TDS, 34.67-99.93 percentage reduction of NO3-, EC, Cl-, BOD, COD, DO, TSS, and TDS, 52.83-97.95 percentage reduction of Pb2+, Ni2+, Cr 3+ and Mn2+ and 34.59-94.87 percentage reduction of Pb2+, Ni2+, Cr3+ and Mn2+. Carbonization, small particle, size and longer contact time enhanced the sorption capabilities of the sorbents. These show that protein and cellulosic wastes can be used to detoxify wastewater. © Copyright 2012 John Kanayochukwu Nduka.
Nduka, J. K. (2012). Application of chemically modified and unmodified waste biological sorbents in treatment of wastewater. International Journal of Chemical Engineering. https://doi.org/10.1155/2012/751240