Phytoremediation of Emulsion Paint Wastewater using Azolla Pinnata, Eichhornia Crassipes and Lemna Minor

Authors

  • E. A. Echiegu Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka, Enugu State, NIGERIA
  • C. O. Ezimah Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka, Enugu State, NIGERIA
  • M. E. Okechukwu Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka, Enugu State, NIGERIA
  • O. A. Nwoke Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka, Enugu State, NIGERIA

Keywords:

phytoremediation, Eichhornia crassipies, Azolla pinnata, lemma minor, paint wastewater, heavy metals

Abstract

The use of three macrophytes namely Azolla pinnata, Eichhornia crassipes and Lemna minor for the phytoremediation of emulsion paint wastewater was investigated. Samples of the paint wastewater and test plants were collected and analyzed for physicochemical characteristics and heavy metal concentrations before and after phytoremediation for six weeks. The TDS of the treated wastewater was reduced by over 80.0% by each of the test plants while the TSS increased as a result of debris from withered test plants. Dissolved oxygen reduction ranged from 12.5% to 50.0%, COD from 49.5% to 57.1%, BOD from 46.7% to 54.7, heavy metals from 11.0 to 92.5%. A.pinnata appears to have performed significantly better (P<0.05) than the other plants followed by E.crassipies and L.minor. It can be concluded that the test plants (especially A.pinnata) can be effectively used for the preliminary treatment of paint wastewater.

http://dx.doi.org/10.4314/njt.v40i3.21

Downloads

Published

2021-06-29 — Updated on 2021-06-29

Versions

Issue

Section

Agricultural, Bioresources, Biomedical, Food, Environmental & Water Resources Engineering