Abstract：
:The potential of rice husks and straw as adsorbents after being processed by subcritical water hydrolysis (SWH) was investigated. The influences of temperature (453, 493 and 533 K) and liquid/solid ratio (7.5 and 15 g water/g biomass) on the rice straw and rice husks characteristics and on the adsorption capacity of 2-nitrophenol were evaluated at pH 4 and 7. Adsorption kinetics, equilibrium and thermodynamic parameters were also studied. The adsorption capacity was favored at pH 7. Pseudo-first-order model was suitable to predict the kinetic curves for 2-nitrophenol concentrations of 25, 50, 75 and 100 mg/L and the isotherm data obeyed the Freundlich model. Overall, the thermodynamic results revealed a spontaneous and exothermic process. The maximum adsorption capacity (92.97 ± 1.31 mg/g) was obtained for rice straw that has undergone an SWH at 453 K and 7.5 g water/g straw. The integration of processes to valorize co-products can make the production of cellulosic bioethanol more feasible.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Abaide ER,Dotto GL,Tres MV,Zabot GL,Mazutti MAdoi
10.1016/j.biortech.2019.03.110subject
Has Abstractpub_date
2019-07-01 00:00:00pages
25-35eissn
0960-8524issn
1873-2976pii
S0960-8524(19)30473-0journal_volume
284pub_type
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