Study on New Tea Soap Based Chelating Agent Synthetic Materials and the Repairing Effect of Heavy Metal Pollution in Environment

By water extraction, precipitation method we can extract tea saponin from tea seed cake and design and synthesize the new green tea soap based chelating agent in the synthesis design (tea saponin sodium sulfate). Study on the surface properties, the surface tension is lower than the tea saponin, and the value of HLB, foaming ability and foam stability are better than that of tea saponin. At the same time, considering the effects of heavy metal rate oscillation time, chelating agent concentration, pH and ionic strength on the chelating agent to remove, the results show that with the increase of oscillation, the removal rate and time of heavy metal concentration increase, and decrease with the increase of ionic strength and pH, thus concluding the optimum process of the removal of pb2+, cd2+ ions: the oscillation time is 12h, the mass fraction is 7%,the concentration of Ca (NO3)2 is 5.0, 0.01mol/L. Under this condition, ion removal rate of pb2+, cd2+ ions is the highest. The removal rate of tea saponin sodium sulfate ion on Cd2 is higher than Pb2 + ions, and these two kinds of tea saponin sodium sulfate ion removal rate are higher than that of tea saponin, improvement effect is obvious especially for Pb2 + ion removal rate.