2 results about "Chelating polymers" patented technology

Systems and methods of separating a metal ion from an aqueous solution comprising the metal ion include contacting the aqueous solution with a polymer. Contacting the aqueous solution with the polymer may include passing the aqueous solution through a packed bed column comprising the polymer. The aqueous solution may include about 0.5 wt.% to about 26 wt.% sodium chloride, and the metal ion includes silver, copper, zinc, nickel, or a combination of any two or more thereof.

The invention discloses a trace heavy metal conductivity detection method, and relates to the technical field of heavy metal conductivity detection.The trace heavy metal conductivity detection method comprises the steps that a conduction framework layer and a selective enrichment layer are constructed on an inert substrate in an in-situ mode, and interpenetrating compatibility is conducted at pore channels to form a through interface; the conductive skeleton layer is composed of reduced graphene and a carbon nanotube interpenetrating network, and is provided with in-plane oriented and vertically through electronic channels; the selective enrichment layer is a chelating polymer nano brush which is subjected to post-modification of chelating sites in metal organic framework holes or surface-initiated grafting, and the hole channels are kept communicated and not blocked; comprising the following steps: locking a background conductance baseline, realizing selective enrichment by mild disturbance, reading and synchronizing an environment drift parameter set in the same time window without changing system composition, executing single difference to enable a differential conductance signal to be a unique target indication quantity, and giving a result by combining a material calibration curve. The problem that weak signals in a complex water sample are masked and drifted and are difficult to deduct is solved.