Metal Removal from Wastewater Using Sludge from a Natural Stabilization Pond as Biosorbent

Potential use of a sludge produced in a natural facultative pond as biosorbent to remove metal ions Sludge showed high efficiency in the removal of Pb, Cd, and Ni. High removal of Cr (85-75%) at pH 2 after 240 min of contact time at 10 and 25 mg/L, respectively. The Langmuir isotherm model fitted the equilibrium data best. Double positive environmental impact, promoting the use of a solid residue to clean a liquid one.