The usefulness of chlorella pyrenoidosa were investigated for the removel of U(VI) from aqueous solution. Employing monofactorial and orthogonal experiment method for evaluating the biosorption of U(VI) onto chlorella pyrenoidosa, respectively, the influence of U(VI) concentration, pH, N/P and temperature on the biosorption of U(VI) by chlorella pyrenoidosa were studied.The results showed that the pH and U(VI) concentration were significant to remove U(VI) and that the increases of pH as well as U(VI) concentration was beneficial to the U(VI) absorption. However, the U(VI) absorption was affec...