INHIBISI SENG TERHADAP PERTUMBUHAN ALGAE HIJAU (Chlorella Sp.)

Abstract

Toxicity test was conducted to obtain the tolerance limit of cadmium concentration for the growth of green algae. The test were done for zinc (ZnSO₄) concentrations of 0,2; 1; 5; 25 and 50 mg/l. Observations were done continuously for a period of 96 hours at pH of 5 and 7. Statistic test for  concentrations, pH and detention time effects were determined. The results of observations show that the limit of tolerance for green algae (Chlorella sp.) for zinc was 0,29 mg/l at pH of  7 and 0,0052 mg/l at pH of 5. Statistics test showed that the interaction of concentration, pH and detention time decreased green algae’s growth, while the concentration had a greater effect.