Adsorption studies for the amputation of lead from squander water by using straws of oryza sativa (rice)

Adsorption is potentially an attractive technology for the treatment of waste water for retaining the heavy metals from dilute solutions. And it is one of the most common phenomenons for the treatment of lead-polluted water. The study evaluated here presents the experiments to determine the suitable conditions of Temperature, Contact Time, pH, Agitation Speed, Adsorbent Dose, Mesh Size and Metal Ion Concentration, for the use of Oryza Sativa (Rice) Straw, as adsorbent for the exclusion of lead from aqueous solution. The results revealed that maximum adsorption was observed at 20 degrees Celsius and at a contact time of 1.5 hr and an equilibrium time for keeping the ions adsorbed was observed between 0.5-1.5 hrs at a pH range of 6.9-7.0 and at an agitation speed of 150 rpm, with an adsorbent dose of 3.5 grams and mesh size 50-80, for as dilute metal ion concentrations as 16 ppm. (author)