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Sorption Effectiveness of Nannochloropsis salina Towards Mn2+ Ion in Different Salinity Waters

Y. Hala(1), E. Suryati(2), P. Taba(3), Harjuma Harjuma(4), K. M. Manan(5),


(1) Faculty of Mathematic and Natural Sciences Hasanuddin University, Makassar lndonesia Jl. Perintis Kemerdekaan Km. 10, Kampus Tamalanrea Makassar 90245
(2) Research institute for Coastal Aquaculture, Maros lndonesia Jl. Makmur Dg. Sitakka, Maros 90511
(3) Faculty of Mathematic and Natural Sciences Hasanuddin University, Makassar lndonesia Jl. Perintis Kemerdekaan Km. 10, Kampus Tamalanrea Makassar 90245
(4) Faculty of Mathematic and Natural Sciences Hasanuddin University, Makassar lndonesia Jl. Perintis Kemerdekaan Km. 10, Kampus Tamalanrea Makassar 90245
(5) Faculty of Mathematic and Natural Sciences Hasanuddin University, Makassar lndonesia Jl. Perintis Kemerdekaan Km. 10, Kampus Tamalanrea Makassar 90245
Corresponding Author

Abstract


Research on sorption effectiveness of Nannochloropsis salina towards Mn2+ ion in different salinity waters has been carried out. This research was conducted to observe the effectiveness of N. salina as biosorbent for Mn2+pollutants in waters. Addition of Mn2+ ion with concentrations of 2, 4, and 8 ppm respectively, was conducted at the beginning of the  N. salina growth in Conwy Medium. Those variations were conducted at salinity of 5‰ and 30‰, aeration, continuous illumination, and also at temperature of 20 oC. The N. salina growth after addition of metal ion was observed every day using haemocytometer and the concentration of metal ion after adsorption was determined by atomic absorption spectrophotometer. Results showed that the optimum time for growth of N. salina as a control was obtained on day 8th at 30‰  salinity while at 5‰  salinity was obtained on day 15th except for 8 ppm Mn2+ was obtained on day 19th. The maximum  removal efficiency of Mn2+ with the concentrations of 2; 4; and 8 ppm at 30‰  salinity medium was 52.50; 59.25 and 55.38% respectively and for 5‰  salinity, the maximum removal efficiency of Mn2+ concentrations of  2, 4 and 8 ppm were 65.50; 64.66 and 67.20% respectively. The optimum time for growth of N. salina at 5‰ salinity medium is higher than at 30‰ salinity but the removal efficiency is conversely associated.


Keywords


sorption, nannochloropsis salina, effectiveness, manganese

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