Comparison of heavy metal and nutrients removal in Canna indica and Oryza sativa L. based constructed wetlands for piggery effluent treatment in north-central Nigeria

Olawale, Olamide and Raphael, Davids O. and Akinbile, Christopher O. and Ishuwa, Kater (2021) Comparison of heavy metal and nutrients removal in Canna indica and Oryza sativa L. based constructed wetlands for piggery effluent treatment in north-central Nigeria. International Journal of Phytoremediation. pp. 1-9. ISSN 1522-6514

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Official URL: http://dx.doi.org/10.1080/15226514.2021.1900062

Abstract

Batch-fed horizontal sub-surface flow constructed wetlands (HssFCW) were developed to compare the potential of Canna indica and Oryza sativa L. in removing heavy metals and nutrients from piggery effluent. Piggery effluent samples were characterized for nutrients (N and P) and metals (Mg, Al, Ca and Fe) before and after introducing them to the HssFCW with hydraulic retention time (HRT) of 3 days and operational flowrate of 0.014 m3 /day. Three sets of constructed wetlands (CWs) were monitored during the dry season for 3 months. The bioconcentration factor (BCF) and translocation factor (TF) for the plants were evaluated. The results were all significantly different at p � 0.05. O. sativa L removes more nutrients and metals than C. indica. The BCF for O. sativa L. was higher than for C. indica, while the TF for C. indica was higher for O. sativa L., indicating a higher metal translocation potential. Use of C. indica, a non-food crop, poses no health risks in HssFCWs whereas the grains of O. sativa L. are consumed directly by humans, presenting potential risks when used in HssFCWs. Compared to an annual O. sativa L., the perennial C. indica can be grown continuously in CWs for the phytoremediation of piggery effluent.

Item Type: Article
Subjects: T Technology > TP Chemical technology
Depositing User: Unnamed user with email ajani.david@lmu.edu.ng
Date Deposited: 24 Jun 2021 13:10
Last Modified: 24 Jun 2021 13:10
URI: https://eprints.lmu.edu.ng/id/eprint/2957

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