In this review attention is focused on the various traditional and ecofriendly adsorbents, including
a few of the local repositories which have proven enhanced performance for environmental
pollutants removal. Due to their low cost and local availability, natural materials such as zeolite,
montmorillonite-rich bentonite, industrial waste product chezacarb, beringite, chitosan, low rank coal
shungite, fossil alginite, slovakite, starch, peat, commercial-grade active coke and iron oxihydroxides
GEH were chosen to evaluate their adsorption performance in selected pollutant removal. A mathematical
evaluation and fundamental aspects of the adsorption process are discussed respectively. The maximum
adsorption capacity of ODA-zeolite towards oxyanionic sulphate, chloride and nitrate reached the values 7-9 mg/g,
while the maximum adsorption capacity of Fe(III)alginate zeolitic pellets towards nitrate reached the value 44 mg/g. Adsorption
isotherm for phenol onto carbonized zeolite did not proceed according to the standard isotherm shape whereas the
first plato recorded the maximum capacity even around 100 mg/g.
Keywords: Adsorption, clinoptilolite-rich tuff, ecofriendly adsorbents, industrial waste products, abundantly available natural
resources, azodye, cefazoline, inorganic pollutants.
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