References
- Abassi, S. A. & Nipaney, P. C., 1985: Waste-water treatment using aquatic plants: Survivability and growth of Salvinia molesta (Mitchell) over waters treated with Zinc (II) and the subsequent utilization of the harvested weeds for energy (biogas) production. — Resources Conserv. 12: 47–55.
- Adams, F. S., Cole Jr., H. & Massie, L. B., 1973: Elements constitution of selected aquatic plants from Pennsylvania: Submersed and floating leaves species and rooted emergent species. — Environm. Pollut. 5: 91–103.
- APHA, 1985: Standard methods for the examination of water and wastewater. 16th ed. American Public Health Association, Washington DC. 1268 pp.
- Boyd, C. E., 1970: Arch. Hydrobiol. 67 (1): 78–85. — In: Handbook of ecological parameters and ecotoxicology. (Jorgensen, S. E., Nielsen, S. N. & Jorgensen, L. A., 1991. Elsevier Science Publishers B.V., Amsterdam. 1263 pp.).
- Boyd, C. E., 1978: Chemical composition of wetland plants in freshwater wetlands: Ecological processes and management potential: 155–168. Good, R. E., Whigham, D. F. & Simpson, R. L. (eds.). New York Academic Press, Inc.
- Dykyjova, D., 1979: Selective uptake of mineral ions and their concentration factors in aquatic higher plants. — Folia Geobot. Pbytotax. 5: 267–325.
- Gries, C. & Garbe, D., 1989: Biomass, and nitrogen, phosphorus and heavy metals content of Phragmites australis during the third growing season in a root zone waste water treatment. — Arch. Hydrobiol. 117 (1): 97–105.
- Hammer, D. A., 1990: Constructed wetlands for wastewater treatment, municipal, industrial and agricultural. Lewis publishers, Inc. Michigan, 831 pp.
- Hutchinson, G. E., 1975: Limnological Botany. New York Academic Press, Inc., 660 pp.
- Jain, S. K., Vasudevan, P. & Jha, N. K., 1989: Removal of some heavy metals from polluted water by aquatic plants: studies on duckweed and water velvet. — Biol. Wastes 28 (2): 115–126.
- Muramoto & Oki, Y., 1983: Removal of some heavy metals from polluted waters by water hyacinth (Eichornia crassipes). — Bull. Environm. Contam. Toxicol. 30: 170–177.
- Rodier, J., 1981: Analisis de las aguas, aguas naturales, aguas residuales y aguas de mar. Omega Ed., Barcelona, 1059 pp.
- Van der Merwe, C. G., Schonbee, H. J. & Pretorius, J., 1990: Observations on concentrations of the havy metals zinc, manganese, nickel and iron in the water, in the sediments and in two aquatic macrophytes, Typha capensis (Rohrb.) N. E. BR. and Arundo donax L. of a stream affected by goldmine and industrial effluents. — Water SA 16 (2): 119–124.