期刊
WATER AIR AND SOIL POLLUTION
卷 228, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/s11270-016-3238-8
关键词
Arsenic; Ceratophyllum; Hydrilla; Lemna; Phytoremediation; Successive application
资金
- University Grants Commission, Government of India [30-112/2015(BSR)]
- BHU
- UGC, New Delhi
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 mu g 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.
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