Efficient composite heavy metal chelating agent
A heavy metal chelating agent, high-efficiency technology, applied in the direction of adsorption water/sewage treatment, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of lethality of aquatic organisms, yellowish color of effluent, toxicity, etc. , to achieve the effect of low production cost, simple equipment and strong adsorption and flocculation ability
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[0019] The high-efficiency composite heavy metal chelating agent contains components (by mass percentage): 38% of nano-alumina, 17% of disodium edetate, and 45% of sodium carboxymethyl starch.
[0020] The preparation method of above-mentioned high-efficiency composite heavy metal chelating agent comprises the steps:
[0021] 1) Add nano-alumina and sodium ethylenediamine tetraacetate into the reaction kettle according to the proportion of mass percentage;
[0022] 2) Heat the reactor to 65°C and stir for 60 minutes to fully mix the nano-alumina and sodium edetate to form a semi-finished product;
[0023] 3) Pour the semi-finished product into the blender, add sodium carboxymethyl starch measured according to the percentage ratio, and stir for 30 minutes to obtain the finished product.
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