Copper removal from aqueous solution of contaminated soil using natural zeolite [electronic resource]

Includes bibliographic reference

Natural zeolite is used as an inexpensive sorbent to remove copper from water. The
factors that affect adsorption include contact time, temperature during adsorption, starting copper
concentration, and S/L ratio. Zeolite from an acidic media has been studied to identify its equilibrium
and kinetic properties. This investigation's goal was to assess the removal of copper using various
solutions and the adsorption of copper from pre-contaminated soil. Metals were removed from the soil
by washing with organic weak acids such as citric, maleic, succinic, tartaric, lactic, and oxalic. The
surface layer (0–30 cm) of the soil was sampled in the field of Inchass, Sharkia Governorate, Egypt.
100 ppm copper citrate was present in the soils as a pre-contaminant. To test the copper's ability to
leach effectively, mild organic acids were applied in concentrations ranging from 0.5% to 3.0%. Under
ideal circumstances, it has been discovered that the realistic capacity of copper to adsorb onto zeolite
can reach 32 mg/g, which corresponds to the 32 mg/g Langmuir isotherm. The nature of the copper
adsorption by the natural zeolite has also been determined using physical characteristics, such as
adsorption kinetics, isotherm models, and thermodynamic data. The Langmuir isotherm and the
pseudo-second-order reaction were both found to be in agreement with the functional natural zeolite.
Key words: Copper removal, leaching agent, natural zeolite, adsorption isotherms.

Summary in Arabic