KEMAMPUAN TANAMAN APU- APU (Pistia stratiotes L.) DALAM MENURUNKAN KADAR LOGAM BERAT NIKEL (Ni) LIMBAH CAIR

Abstract

ABSTRACT
Research on reduction of Nickel (Ni) heavy metal in wastewater by using a water plant lettuce (Pistia
stratiotes L.) was conducted with the aim of knowing the level of Ni reduction in wastewater after the plants are
given water plant lettuce (Pistia stratiotes L.). The technique used in processing wastewater of the metal plating
is phytoremediation.
This study was pure experiment with pretest-posttest design with control group used complete
randomized design (CRD). This study was conducted in December to June, 2016.
The results showed that the level of Ni in wastewater decreased after 1 day, 3 day and 6 day treatment
with water plant lettuce. From the statistical test result, the reduction of Ni was significant with 5 plants by p =
0.023 < α. Based on the contact time duration, the result of statistical test was p = 0.000 < α. The more the
number of plants used, the greater the reduction of Nickel level. The longer the contact time of the water plant
with wastewater, the greater the reduction of Nickel level in wastewater.
For further study, it is suggested to use plant that is hyper tolerant against contaminants and used
more plants to proceed wastewater and more comparable with the level of Ni metal contained in wastewater
metal plating.
Keywords : Nickel level reduction, water plant lettuce (Pistia stratiotes L.),
contact duration, phytoremediation.