Oak wood and oak bark chars were obtained from fast pyrolysis in an auger reactor at 400-450   C. These chars were characterized and utilized for @entity6596 remediation from water. Batch sorption studies were performed at different temperatures, pH values and solid to liquid ratios. Maximum @entity3407 was removed at pH 2.0. A kinetic study yielded an optimum equilibrium time of 48 h with an adsorbent dose of 10 g/L. Sorption studies were conducted over a concentration range of 1-100mg/L. @entity6596 removal increased with an increase in temperature (Q(Oak wood)(  ): 25   C = 3.03 mg/g; 35   C = 4.08 mg/g; 45   C = 4.93 mg/g and Q(Oakbark)(  ): 25   C = 4.62 mg/g; 35   C = 7.43 mg/g; 45   C = 7.51 mg/g). More @entity3407 was removed with oak bark than oak wood. The char performances were evaluated using the Freundlich, Langmuir, Redlich-Peterson, Toth, Radke and Sips adsorption isotherm models. The Sips adsorption isotherm model best fits the experimental data [high regression (R(2)) coefficients]. The overall kinetic data was satisfactorily explained by a pseudo second order rate expression. Water penetrated into the char walls exposing @entity6596 to additional adsorption sites that were not on the surfaces of dry char pores. It is remarkable that oak chars (S(BET): 1-3m(2)g(-1)) can remove similar amounts of @entity6596 as activated @entity505 (S(BET):     1000 m(2)g(-1)). Thus, byproduct chars from bio-oil production might be used as inexpensive adsorbents for water purification. Char samples were successfully used for @entity3407 remediation from contaminated surface water with dissolved interfering ions.

Modeling and evaluation of XXXX remediation from water using low cost bio-char, a green adsorbent.

@entity505 :: ('MESH:D002244', 'Chemical') :: ['carbon'] @entity3407 :: ('MESH:D002857', 'Chemical') :: ['chromium'] @entity6596 :: ('MESH:C074702', 'Chemical') :: ['Cr(VI)']
@entity3407 :: (MESH:D002857,Chemical) :: ['chromium']
