The following facts are related to the properties of colloids: (　) ① Use salt brine to bake tofu ② Electrostatic precipitator ③ Hemodialysis ④ River estuaries form deltas

The properties of colloids include Tyndall effect; coagulation; electrophoresis. The colloidal particle size is between 1nm-100nm and cannot penetrate the semipermeable membrane.

① Using brine to cook tofu is an application of colloid coagulation, which is related to the properties of the colloid;

② Electrostatic precipitating is an application that utilizes the properties of colloid electrophoresis, and is related to the properties of the colloid;

③ Hemodialysis means that in blood, proteins and blood cells have larger particles, which are colloids and cannot pass through the dialysis membrane. Toxic substances in the blood can pass through if they are smaller in diameter, which is related to the properties of colloids; < /p>

④The formation of deltas at river estuaries is the function of colloid sedimentation and is related to the properties of colloids;

So the answer is: D.

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