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HERO ID
5113713
Reference Type
Journal Article
Title
Efficient simultaneous removal of cadmium and arsenic in aqueous solution by titanium-modified ultrasonic biochar
Author(s)
Luo, M; Lin, H; He, Y; Li, B; Dong, Y; Wang, L
Year
2019
Is Peer Reviewed?
Yes
Journal
Bioresource Technology
ISSN:
0960-8524
EISSN:
1873-2976
Volume
284
Page Numbers
333-339
Language
English
PMID
30953861
DOI
10.1016/j.biortech.2019.03.108
Web of Science Id
WOS:000464942500039
Abstract
Simultaneous removal of cations and anions in wastewater has always been a great concerned environmental problem. In this study, a friendly and inexpensive biosorbent to simultaneously remove Cd(II) and As(V) from aqueous solution was synthesized by ultrasonic biochar and nanoscale TiO2 (TD), and the obtained sorbent was named as BCTD. The maximum sorption capacities of Cd (72.62 mg/g) and As (118.06 mg/g) were much higher than that of other carbon-materials. Both experiments showed that the Cd(II) and As(V) adsorption capacity was above 70% at pH = 5. The Cd(II) and As(V) adsorption on BCTD had a competitive effect in binary metal solutions at above 100 mg/L. The BET, SEM-EDS, FTIR and XPS analyses proved that ultrasonically reacting enhanced the surface area and pore volume of biochar and TD was supported on the biochar surface and inner pores successfully, and the dominant sorption mechanism by BCTD was the ion exchange and complexation.
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