Preparation, characterization, and application of polypropylene–clinoptilolite composites for the selective adsorption of lead from aqueous media

Comparative assessment of compost and zeolite utilisation for the simultaneous removal of BTEX, Cd and Zn from the aqueous phase: Batch and continuous flow study

“…The increase of the adsorbent dose increases the pollutants' removal rate, as there are more exchangeable sites at the available sorbent surface, which can be potentially covered by organic and inorganic pollutants. This result is also consistent with that of other studies (Motsa et al, 2011;Apiratikul and Pavasant, 2008). The optimal dose for the compost, with a 1 mM initial concentration, was 1.5 g for BTEX and 1 g for the metals and further increase in the compost dose did not lead to a higher removal.…”

“…In general, it was evident that the adsorption of the metal ions increased with the increase of the pH value (lower H þ cations) (Motsi et al, 2009), which should be lower than the minimum pH for precipitation (Apiratikul and Pavasant, 2008;Auta and Hameed, 2014). The effect of the pH value on the adsorption capacity of the materials was also confirmed by the research of Mihaly -Cozmuta et al, 2014 and Motsa et al, 2011. The lower the pH value the lower removal of the pollutants from the aqueous phase especially for the metals as their solubility in water is highly dependent on pH.…”

Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

“…Adsorption using innovative clay/polymer hybrid materials is regarded as one of the most effective methods to remove heavy metals from aqueous solutions, because these hybrids possess lots of functional groups and unique network structure [7,8,[22][23][24][25][26]. Clays represent promising support materials for polymers due to their mechanical and chemical stability, low cost, abundant availability, and non-toxicity to organisms [7,24].…”

“…This limitation can be minimized by the use of insoluble clay-polymer composites [8,26]. Furthermore, the clay fillers disperse within the polymer and increase the surface area for sorption since agglomeration is largely limited [22].…”

Adsorption of Pb(II) Ions on Sulfuric Acid TreatedLeucaena leucocephalaLeaf Powder

“…Pb can cause serious diseases such as cancer, anemia and intellectual disability [2]. The overcome the release of Pb(II) ions into water bodies, numerous conventional treatments are used such as membrane process, chemical precipitation, electrodialysis and coagulation [3]. These treatments however, are inefficient to treat low concentrations of Pb(II) ions and can generate production of secondary pollutants at the end of the treatment processes [4].…”