Abstract:
:A novel bio-adsorbent was successfully synthesized by pyrolyzing Alternanthera philoxeroides (AP), one of the most widely used hydrophytes for eutrophic lake ecological restoration under O2-limited condition at 600 °C. Compared with commercially active carbon (AC), the initial solution pH had a weak effect on the adsorption of Pb(II) by AP biochar (APB). The maximum adsorption capacity of APB for Pb(II) was 257.12 mg/g, which was 5.3 times of that of the AC. The adsorption process was fast, with only 2.5h to reach adsorption equilibrium. The adsorption mechanism of Pb(II) by APB involves the precipitation and complexation of Pb(II) with free carboxyl/hydroxyl functional groups and mineral carbonates of APB as well as ion replacement between Pb(II) and alkaline earth cations. These results suggest that using a low-cost APB adsorbent for heavy metals contaminated water treatment may have great ecological and environmental significance.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Yang Y,Wei Z,Zhang X,Chen X,Yue D,Yin Q,Xiao L,Yang Ldoi
10.1016/j.biortech.2014.08.015subject
Has Abstractpub_date
2014-11-01 00:00:00pages
227-32eissn
0960-8524issn
1873-2976pii
S0960-8524(14)01122-5journal_volume
171pub_type
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