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A Successive Application Approach for Effective Utilization of Three Aquatic Plants in Arsenic Removal
- Poonam,, Upadhyay, Munish Kumar, Gautam, Ambedkar, Mallick, Shekhar, Srivastava, Sudhakar
- Water, air, and soil pollution 2017 v.228 no.2 pp. 54
- Ceratophyllum demersum, Hydrilla verticillata, Lemna minor, aquatic plants, arsenic
- In the present study, the performance of three selected aquatic plants [Hydrilla verticillata (H), Ceratophyllum demersum (C), and Lemna minor (L)] was evaluated for As removal from water when used in a successive application approach. The plants were subjected to 4 L of As-containing Hoagland medium (500 and 2500 μg L⁻¹ as low and high exposure, respectively) for a period of 21 days in slots of 7 days each. The results showed that total As removal in 21 days varied in different combinations. The best combination was HCL showing 27 and 18% As removal in low and high As treatments, respectively, followed by HLC (21 and 16%), and LCH (15% and 12%). The lowest As removal was achieved by LHC and CLH combination in low As treatment (11%) and by CLH in high As treatment (6%). Individual plant exhibited different removal potential from combination to combination and from application at various stages. The contribution of Hydrilla varied from 8 to 52%, Ceratophyllum from 18 to 64% and Lemna from 18 to 66%. The study advocates the combination of Hydrilla-Ceratophyllum-Lemna for achieving the maximum As removal in the same period.