Experimental methodology
copper removal by chitosan beads —-( copper sulfate pentahydrate solution are used)
1- equilibrium study
2- kinetic study
3- ph study
4- contact time study
5- regeneration study

• phosphate removal ( orthophosphate solution ) using copper chitosan beads after copper adsorption
  1- effect of copper loaded concentration
  2- effect of another anion like ( chloride, sulfate, and nitrate) on adsorption of orthophosphate
  3- equilibrium study
  4- kinetic study
  5- ph study
  6- regeneration study