Kinetics

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

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

This study provides information on the Cr(VI) adsorption potential of Turkish (Mihalıççık region) montmorillonite clay as an abundant, cost-effective and untried material. Batch adsorption trials of chromium were performed to investigate the effects of pH, contact time, and initial metal ion concent

Adsorption of Reactive Blue 21 (RB21) onto fly ash (FA) and sepiolite from aqueous solutions was investigated. Batch adsorption experiments were carried out to evaluate the influences of experimental parameters such as initial dye concentration (100–750 mg/l), pH (2–8), adsorbent dosage (1–4 g/l) an

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

Mono- and pentamine immobilized silica were prepared through the treatment of silica with 3-aminopropyltriethoxysilane and 3-glycidoxypropyltrimethoxysialne. The success of immobilization process was confirmed by means of FT-IR and thermogravimetry (TG). The surface properties of the modified silica

Adsorbent prepared from maize cob powder (MCP), an agricultural waste, was successfully used to remove the malachite green from an aqueous solution. The adsorption was carried out by varying the parameters such as agitation time, dye concentration, adsorbent dose and pH at constant temperature of 27

Polyamide 6.6 (PA 6.6) membranes were modified with glutaraldehyde, in a phase inversion process. Immobilization of the enzyme laccase from Pleurotus sajor-caju in the modified PA 6.6 film was quantified in the presence of the reducer 2,2’-azino-bis-3-ethylbenzoazoline-6-sulfonate (ABTS). Under thes

The kinetic and thermodynamic behaviors of cationic dye adsorption onto citric acid esterifying wheat straw (EWS) from aqueous solution were investigated. Two cationic dyes, methylene blue (MB) and crystal violet (CV) were selected as adsorbates. The kinetic and thermodynamic parameters of dye adsor

Sodium alginate extracted from the brown algae Laminaria digitata was used to prepare metal sorbing beads. Their metal binding properties were investigated with respect to copper and cadmium ions in single and binary metal solutions. Their behaviour in batch kinetic experiments and in a flow through