Adsorption mechanisms of removing heavy metals and dyes from aqueous solution using date pits solid adsorbent

Chemical Compositions of Date-Pits and Its Potential for Developing Value-Added Product - a Review

“…Date-pits ash showed remarkably higher efficiency of boron removal (71%) and phenol from drinking water as compared to power plant ash, pine tree fly ash, and coagulants [Alhamed, 2009;Al-Ithari et al, 2011]. Two mechanisms were observed for the adsorption of heavy metals: first one was the hydrogen bonding and electrostatic attraction, while other mechanisms were the binding of two cellulose/lignin units; and by two hydroxyl groups in the cellulose/lignin unit [Al-Ghouti et al, 2010].…”

Equilibrium, kinetic and thermodynamic biosorption studies of Hg(II) on red algal biomass of Porphyridium cruentum

“…The value of 1/n from the Freundlich model indicated that the relative distribution of energy sites depended on the nature and strength of the biosorption process. As the value of 1/n for Hg(II) on P. cruentum was 0.38, this suggested that 38% of active sites have equal energy where the biosorption took place (36). According to Temkin model parameters, the heat of adsorption (B) is 0.32 suggesting the weak interaction between the sorbate and sorbent.…”

Removal of Heavy Metals from Wastewater using Date Palm as a Biosorbent: A Comparative Review

“…The raw DP waste of the trunk fiber with different initial particle sizes (75-251 μm) was used and a higher removal of the studied heavy metal was seen with an adsorbent size of 75 μm compared with the largest used particle size (251 μm), which suggested that a greater surface area to metal ion ratio was achieved with smaller particles (Al-Ghouti et al 2010). …”