Chapter

LOW-COST ADSORBENTS FOR THE REMOVAL OF NITROPHENOLS FROM WASTE WATERS

04/2007; DOI:10.1007/1-4020-4800-9_24 pp.263-275

ABSTRACT The adsorption behaviour of three substituted nitrophenols, 2-nitrophenol (2-NP), 4-nitrophenol (4-NP) and 2,4-dinitrophenol
(2,4-DNP), on different type natural materials, yellow/white bentonite, expanded perlite, perlite insulation filter, zeolite,
and on the biosorbent Rhizopus oryzae was studied. The experimental results were analyzed on the basis of the effect of nitrophenol removal, E, calculated from the kinetic curves, as well as on the basis of the values of the equilibrium adsorption capacity, q

max
. According to the equilibrium and kinetic data, the adsorption capacity of the studied materials follows the order:

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Keywords

2,4-dinitrophenol
 
2-nitrophenol
 
4-nitrophenol
 
adsorption behaviour
 
adsorption capacity
 
biosorbent Rhizopus oryzae
 
different type natural materials
 
equilibrium adsorption capacity
 
kinetic curves
 
kinetic data
 
nitrophenol removal
 
nitrophenols
 
perlite insulation filter
 
yellow/white bentonite