Marina Chimica Acta
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THE BIOACCUMULATION OF Cd(II) IONS On Euchema Cottoni SEAWEED BIOAKUMULASI ION Cd(II) PADA RUMPUT LAUT Euchema Cottoni
Full text linkCadmium is an element that can accumulated in seaweed thallus. One of an alternative methode was used to determine the amount of Cd(II) ions were accumulated in Euchema Cottoni thallus is adsorption methode, that was conducted with variations of contact time and concentrations. The concentrations of Cd(II) ions in solutions were determined by using Atomic Absorption Spectrophotometer (AAS). Isothermal model to evaluated the maximum adsoprtions capacity were used Freundlich and Langmuir isotherms. Based on both isothermal models the results showed that adsorption capacity were 33,898 mg/g wet weight by Langmuir and 0,00625 mg/g wet weight by Freunlich isotherms respectively. The adsorptions energy (ΔG) is 9,7482 KJ/mol indicated as physisorptions. While infrared spectrum showed Euchema cottoni have –OH, CO2, -CH2, -CH3, and - SO3- functional groups
ANALISIS KADAR LOGAM Cu DALAM BAKTERI SIMBION PADA SPONS Callyspongia sp
Full text linkThis research aims to analyze the levels of copper (Cu) in the sponge symbiont bacterial. The research was carried out through the steps of isolation, identification, and measurement of the metal content. Sponges used in this research is of Callyspongia sp. Bacteria were isolated from Callyspongia sp sponges in the Bacillus sp gram-positive. By using Atomic Absorption Spectrophotometer, the results showed that the levels of Cu for Callyspongia sp is 8.9112 ppm, while in the extracellular bacterial isolates Cu level ranging between 1.4009 ppm and 2.0336 ppm and in the intracellular is between 0.4786 ppm and 1.7813 ppm. It is concluded that bacterial isolates either in extra- as well as intracellular were both accomodated copper in their bodies
THE EFFECT OF Fe2+ DAN Mn2+ IONS TOWARD β-CAROTENE PRODUCTIVITY BY PHYTOPLANKTON Isochrysis aff galbana (T-iso)
Full text linkThe research aimed to find out the effect of Fe2+ and Mn2+ towards β-carotene productivity as result of oxidative stress from photosystem (PS II). The phytoplanton Isocrysis aff galbana (T-iso) were the microalgae species which had the high lipid content primarily and had potentiality to produce β-carotene as the β-carotene supplement. Analysis method was carried out by the sonication extraction for short and cheap in the lysis cell of phytoplankton biomassa, infra red (IR) to find out the interaction metal ion and UV/VIS spectrophotometer to determine β-carotene concentration. The research result indicateds that Fe2+ has higher impact than Mn2+ on the β-carotene productivity. The interaction of ions metal indicates as M-N, -O-M and M←OH-C complex in the phytoplankton amino acid. The β-carotene concentration is 4,97 µg/g DW in addition Fe2+ 0,30 ppm and 1,95 μg/g DW in Mn2+ 0,20 ppm. The dry weight concentrations of β-carotene indicates that I. aff galbana with Fe2+ addition has potential as β-carotene supplement.