The objective of this study was to investigate Cd phytoremediation ability of Indian mustard, Brassica juncea. The study was conducted with 25, 50, 100, 200 and 400 mg Kg(-1) CdCl2 in laboratory for 21 days and Cd concentrations in the root, shoot and leaf tissues were estimated by atomic absorption spectroscopy. The plant showed high Cd tolerance of up to 400 mg Kg(-1) but there was a general trend of decline in the root and shoot length, tissue biomass, leaf chlorophyll and carotenoid contents. The tolerance index (TI) of plants were calculated taking both root and shoot lengths as variables. The maximum tolerance (TI shoot=87.4 % and TI root=89.6%) to Cd toxicity was observed at 25 mg Kg(-1), which progressively decreased with increase in dose. The highest shoot (10791 μg g(-1) dry wt) and root (9602 μg g(-1) dry wt) Cd accumulation was achieved at 200 mg kg(-1) Cd treatment and the maximum leaf Cd accumulation was 10071.6 μg g(-1) dry wt achieved at 100 mg Kg(-1) Cd, after 21 days of treatment. The enrichment coefficient and root to shoot translocation factor were calculated, which, pointed towards the suitability of Indian mustard for removing Cd from soil.
The research about potential test of water lettuce (Pistia stratiotes) in order of phytoremediation of petroleum liquid waste had been done during. Completely Randomized Design was used in the experiment while the concentration of liquid waste as treatment were: 0, 15, 30, 45, 60 and 75 %. Each treatment were replicated 4 times. Three parameter was measured; Total Petroleum Hydrocarbons (TPH) reduction percentage, efficiency of phytoremediation and number of tillers. Regression analisys were used for the data and two of parameters show the hormesis phenomena, were; efficency of phytoremediation and number of tillers. The highest peak effect of treatment for efficiency of phytoremediation and number of tillers was on 45 %. TPH reduction percentage was the only one parameter that shows linier regression ABSTRAK Penelitian ini mengenai uji potensi pada selada air (Pistia stratiotes) sebagai fitoremediasi limbah cair minyak bumi. Penelitian ini telah dilakukan pada bulan Juni sampai Desember 2012 di Laboratorium Mikrobiologi, Fakultas Biologi, Universitas Sriwijaya, Indonesia. Rancangan Acak Lengkap digunakan dalam percobaan sedangkan konsentrasi limbah cair sebagai perlakuan adalah: 0, 15, 30, 45, 60 dan 75%. Setiap perlakuan direplikasi 4 kali. Tiga parameter diukur; Persentase reduksi Total Petroleum Hydrocarbons (TPH), efisiensi fitoremediasi dan jumlah anakan. Analisis regresi digunakan untuk data dan dua parameter menunjukkan fenomena hormon; Manfaat fitoremediasi dan jumlah anakan. Efek puncak tertinggi perlakuan untuk efisiensi fitoremediasi dan jumlah anakan adalah pada 45%. Persentase penurunan TPH adalah satu-satunya parameter yang menunjukkan regresi linier
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