Utilization of a natural ecosystem bio-waste; leaves of Arundo donax reed, as a raw material of low-cost eco-biosorbent for cadmium removal from aqueous phase

Assessment of unmodified wetland bio-waste: Shoots of Cyperus laevigatus, for cadmium adsorption from aqueous solutions

“…A c c e p t e d M a n u s c r i p t 16 the amount of cadmium adsorbed per unit mass of adsorbent decreased with increasing the adsorbent dose (data not shown), which is in agreement with the recently reported results of Ammari (2014). At higher C. laevigatus to solute concentration ratios, there is a very fast superficial adsorption onto the adsorbent surface that produces a lower solute concentration in the solution than when the C. laevigatus to solute concentration ratio is lower.…”

“…Optimum pH range for Cd adsorption by ground wheat stems was pH ≥ 5.0 (Tan and Ziao, 2009 A c c e p t e d M a n u s c r i p t 14 powder increased from 1.4 to 77.5% with the increase in pH from 2 to 5.5. Most recently, Ammari (2014) found that Cd removal efficiency by Arundo donax untreated leaf powder increased from 78% to 92% with the increase in pH from 3.5 to 5.5.…”

“…Adsorbents such as Euphorbia echinus, Launea arborescens and Senecio anthophorbium (Benhima et al, 2008), Carpobrotus edulis (Chiban et al, 2011a), Withania frutescens plant (Chiban et al, 2012), maize tassel biomass , maize tassel based activated carbon , Arundo donax reed (Ammari, 2014), and biomass of maize stover (Guyo et al, 2014) have been recently investigated for heavy metal removal from aqueous phase. These adsorbents can be considered as economical and environmentally friendly materials for the treatment of heavy metal-contaminated effluents.…”

Facile synthesis of chitosan derivatives and Arthrobacter sp. biomass for the removal of europium(III) ions from aqueous solution through biosorption

“…Thus, it was deduced that under these experimental conditions, the most significant chemical (ionic) changes occurred between pH 1 and pH 3 as it was speculated that as the pH increased, the net negative surface charge increased due to a reduced protonation effect and the ionic point charge distribution contribution of the complexing ligands would tend to increasingly favor Eu(III) uptake (Cadogan et al, 2014). These ionic changes that highly influenced biosorption were attributed to the protonation of the binding sites of the biosorbents and reduction of competing H þ ions as the pH increased from 1 to 3 (Ammari, 2014). Chitosan is usually known to rely mainly on the eNH 2 group as its active metal binding site typically between pH 2 and 4.5 and thus, it is inferred here that as the pH increased from 2 to 3, the metal binding activity of the eNH 2 group increased (Shameem et al, 2006).…”

Kinetic and thermodynamic study of phosphate removal from water by adsorption onto (Arundo donax) reeds

“…Arundo donax reeds grow and spread particularly in the vicinity of water. In Jordan, it grows in a natural ecosystem in Wadi Shueib region located in Al-Balqa' Directorate (Ammari, 2014). Arundo donax reeds suggest a broad potential application as they are abundant in nature (eco-biosorbents), they need low cost operation, and they have high capacity of phosphate removal.…”