PENENTUAN KADAR LOGAM KADMIUM (Cd) PADA TANAMAN KANGKUNG AIR (Ipomoea aquatica Fork.) DAN SEDIMEN SEBAGAI MEDIA TUMBUHNYA DI SAMARINDA
Abstract
The purpose of this study is to determine of the concentration of
heavy metal Cd in water spinach plants and in the sediments as a its
growth medium. The sampling is done at several locations of water
spinach suppliers such as Benanga reservoirs, Asparagus
Bengkuring and the rear outdoor area of FKESMAS Unmul. Cd
contect was analyzed using Atomic Absorption Spectrophotometry
(AAS).The results showed that the content of Cadmium (Cd) in water
spinach plants, which were taken from Benanga reservoir is 0.0022
± 0.0003 mg Kg-1
; Asparagus Bengkuring is 0.0021 ± 0.0004 mg Kg-
1 ; the Rear outdoor area of FKESMAS Unmul is 0.0016 ± 0.0003
mg/kg and the average level of Cadmium in sediment, which were
taken from reservoir Benanga is 0.442 ± 0.336 mg Kg-1
; Asparagus
Bengkuring is 0.513 ± 0.317 mg Kg-1
; the Rear outdoor area of
FKESMAS Unmul is 0.08 ± 0.039 mg Kg-1
. The level of Cadmium in
water spinach plant ranges from 0.0016 to 0.0022 mg Kg-1
, which is
under the limit determined by the BPOM (0.2 mg Kg-1
). The level
Cadmium in the plant is determined by the levels of heavy metals in
sediment with regression coofficient 0.001X (Y = 0.001x + 0.001) at
significance level 0.008. The conclusion of this research is the levels
of heavy metals in the water spinach plant originating from several
suppliers locations in Samarinda meets the qualifications
of hygienic vegetables set by BPOM. And, it also concluded that the
level of heavy metals in water spinach is specified by the level of
heavy metal in its sediment.