There is a broad application area for engineering nanoparticles (ENPs) in virtue of its special physical and chemical properties. ENPs bring a huge advance to development of human society, as well as the questions about whether the manufactured nanomaterials (MNMs) can cause disadvantages to organisms and environment. This paper analyzed the 24-h acute toxicity of water suspensions of the nanosized silicon dioxide (Nano-SiO2) and the normal sized silicon dioxide (Nor-SiO2) as its bulk counterpart to Daphnia magna with different concentration. The experiment considered EC50 value for immobiliza...
