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Abstract:
The feasibility of the bioremediation of cadmium (Cd) using microalgal-biochar immobilized complex (MBIC) was investigated. Major operating parameters (e.g., pH, biosorbent dosage, initial Cd(II) concentration and microalgal-biochar ratio) were varied to compare the treatability of viable algae (Chlorella sp.), biochar and MBIC. The biosorption isotherms obtained by using algae or biochar were found to have satisfactory Langmuir predictions, while the best fitting adsorption isotherm model for MBIC was the Sips model. The maximum Cd(II) adsorption capacity of MBIC with a Chlorella sp.: biochar ratio of 2:3 (217.41 mg g(-1)) was higher than that of Chlorella sp. (169.92 mg g(-1)) or biochar (95.82 mg g(-1)) alone. The pseudo-second-order model fitted the biosorption process of MBIC well (R-2 > 0.999). Moreover, zeta potential, SEM and FTIR studies revealed that electrostatic attraction, ion exchange and surface complexation were the main mechanisms responsible for Cd removal when using MBIC.
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BIORESOURCE TECHNOLOGY
ISSN: 0960-8524
Year: 2017
Volume: 244
Page: 1031-1038
5 . 8 0 7
JCR@2017
9 . 7 0 0
JCR@2023
ESI Discipline: BIOLOGY & BIOCHEMISTRY;
ESI HC Threshold:231
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 104
SCOPUS Cited Count: 117
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1