Heavy metals removal from solution by polyaniline/palygorskite composite

Abstract

Batch adsorption experiments were carried out to remove heavy metal ions such as Cu (II), Ni (II), Cd (II), and Cr (VI) from single-metal solutions using a polyaniline/palygorskite (PP) composite. Different parameters affecting the adsorption capacity such as contact time and pH of the solution have been investigated. The structural characteristics of the PP composite were studied in this work. Atomic absorption spectroscopy was used for the measurement of heavy metal contents, and the adsorption capacity (q e ) calculated were 114 mg Cu (II) g À1 , 84 mg Ni (II) g À1 , 56 mg Cd (II) g À1, and 198 mg Cr (VI) g À1 under optimal conditions. The removal of the metal ions from solutions was assigned to chelation, ionic exchange, and electrostatic attraction. Data from this study proved that the novel organic/inorganic composite presents great potential in the recovery and elimination of noble or heavy metal ions from industrial wastewater.

Removal of copper from aqueous solution using polyaniline and polyaniline/ferricyanide composite

“…Polyaniline/lignin composite was used for the elimination of reactive Ag(I) ion from aqueous solution of ammonia [24]. Polyaniline/palygorskite composite was used for the removal of Cu(II), Ni(II), Cd(II) and Cr(VI) from aqueous solution [25]. The properties associated with polymeric materials are because of accessible active sites, large surface area and short diffusion length.…”

A novel synthesis of TiO2/GO nanocomposite for the uptake of Pb2+ and Cd2+ from wastewater

“…Heavy metals are naturally occurred metal with high density, high atomic mass and exihibit toxicity at low concentrations [1]. Those metals are resulted from varius sources, such as vehicle traffic emissions, cosmetics, electronics, pesticides, plastics, paints, herbicides, food, etc [2,3]. The association of heavy metals with different sources allows them to expose the environment and global community to a real toxic threat [4].…”

Removal of Cr(VI) from aqueous solution using amino‐modified Fe3O4–SiO2–chitosan magnetic microspheres with high acid resistance and adsorption capacity

“…However, the Cr(VI)‐containing effluents from these industries pose a serious threat to the environment and human health because of their carcinogenic and mutagenic properties . To solve this problem, several technologies have been applied for Cr(VI) removal, such as chemical reduction and precipitation, electrodialysis, membrane filtration, ion exchange, and adsorption . The majority of these methods suffer from high technological equipment and operation costs, but adsorption is considered as an economic and cost‐effective method.…”