The sorption of two organic dyes,Rhodamine B (RB) and acid red 1 (AR) by Ginkgo biloba biochar (GBBC) at pyrolytic temperature 700℃ were studied.The effective factors such as pH,contact time,initial concentration and adsorbent dosage were also discussed.The properties of samples were characterized by SEM and BET.The results showed that GBBC was an ideal absorbent for RB and AR removal characterized by wide adaption range of pH (from 2 to 12).The removal rate of RB was up to 99.61%,when the condition with an initial RB concentration of 150 mg/L,contact time of 55min and GBBC dosage of 0.3g,then AR removal rate was 97.81% (initial concentration 100mg/L,contact time 120min,biochar dosage 0.3g).The dynamic adsorption behavior of RB was more consistent with the pseudo-secong-order kinetic model (R2=0.9534),and kinetic of AR could be well described by Elovich model (R2=0.9655).The equilibrium sorption data were best described by the Langmuir-Freundlich (R2=0.9888) and Langmuir (R2=0.9923) model for RB and AR,respectively.GBBC was an efficient adsorbent,but the sorption mechanisms of biochar for RB and AR were different.
Zhang Penghui, Li Yanchun, Hu Haobin, Hu Huaisheng, Gai Ke
. Sorption property of different dyes by ginkgo biloba biochar[J]. New Chemical Materials, 2020
, 48(9)
: 212
-217
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.09.046
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