Isotherm

A new composite material able to remove hexavalent chromium [Cr(VI)] ions from aqueous solutions was obtained by reacting poly(4-vinylpyridine) (P4VP) with bentonite clay [Bf]. Two composite samples, Bf0.06 and Bf0.3, were prepared by varying initial amounts of P4VP. Thermogravimetric analysis revea

NaOH treatment on oil palm frond (OPF) to improve its heavy metal sorption was investigated. OPF was treated with between 0.1 and 1.1 M of NaOH for up to 5 h. For the sorption study, 1.0 g of the sorbent was in contact with 250 ml of 100 mg/l Zn and Cu solutions. Response surface methodology (RSM) w

Biosorption of lead(II) ions onto Phaseolus vulgaris L. waste was investigated with the variation in the parameters of pH, contact time, biosorbent and lead(II) concentrations and temperatures. The nature of the possible biosorbent and metal ion interactions was examined by the FTIR technique. The l

Adsorption techniques are widely used to remove certain classes of pollutants from waters, especially those that are not easily biodegradable. Dyes represent one of the problematic groups. Natural zeolite was used as a low-cost adsorbent to evaluate its ability to remove color from effluents. In thi

The leaf sheath fibres of the Mediterranean seagrass Posidonia oceanica (L.) were used as low cost, available and renewable biological adsorbent for the removal of a metal complex textile dye from aqueous solutions. Batch experiments were carried out for sorption kinetics and isotherms. Operating va

The use of low-cost and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. Orange peel was collected from the local fields of orange trees and converted into a low-cost adsorbent. The present study deals with the r