Rusnam, Rusnam and Efrizal , Efrizal
(2016)
The Ability of Water Plants to Reduce the Level of Mercury Pollution in Water Quality in Irrigation.
International Journal of Waste Resources, 6
(2).
pp. 2-6.
ISSN 2252-5211
Abstract
This research was conducted on July – October 2013 about a mercury analysis which has been performed in
Environmental Engineering Laboratory of Engineering Faculty, Andalas University. The level of mercury that is
permitted by Government Regulation Republic Indonesia No. 82 of 2001 at the fourth grade for water are at 0.005
mg/l. In that analysis, mercury contents with 0.020169 mg/l at irrigated areas in Batang Hari River. This research
aims to find out the ability of water lilies (Salvinia molesta), wood lettuce (Pistia stratiotes), and water hyacinth
(Eichhornia crassipes) to decrease the content of water level. This research used experimental methods and the
initial content of heavy metals mercury (Hg) by using 0.02 mg/L, 0.06 mg/L, and 0.1 mg/L. The results at decreasing
concentrations of heavy metals mercury will be compared with the quality standard of heavy metal mercury at the
fourth grade of water. The result showed that water lilies (Salvinia molesta), wood lettuce (Pistia stratiotes), and
water hyacinth (Eichhornia crassipes) were able to fix the water quality for irrigation which contaminated heavy metal
(Hg). Then, mercury concentration reached a quality standard for irrigation at early concentration 0.02 mg/L during
the 15 days and at early concentration 0.1 mg/L during 35 days. From the analysis, it was found that Water hyacinth
(Eichhornia crassipes) is the best plant to decrease the concentration of heavy metals mercury.
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