The invention relates to a method for recovering
nickel from
electroplating centralized control
wastewater. The method comprises the following steps in sequence: a, collecting; b, filtering; c, adsorbing, i.e., enabling filtrate obtained in the step b to pass through an adsorption device filled with
nickel high-selectivity resin; d, regeneration, i.e., washing out
nickel ions adsorbed on the resin by acid liquid to obtain regenerated liquid; e,
impurity removal, i.e., sequentially carrying out oxidation
sedimentation and resin adsorption
processing on the regenerated liquid; f,
electrolysis, i.e., using a rhodanized
titanium plate as an
anode, using a
titanium plate as a
cathode and carrying out
electrolysis under the
current density of 150 to 300A / m<2> to obtain a
nickel plate. According to the invention, due to adoption of Tulsion CH-90 resin, nickel solution with relatively
high concentration can be obtained; the method is beneficial for reducing
electrolysis cost of subsequent electrolysis; interference ions with serious influence on nickel electrolysis are removed by three
impurity removal processes; the method also improves the electrolysis rate of
nickel ions and improves the
recovery rate of nickel by selecting the suitable
anode and
cathode, does not generate
sludge and not only is environmental-friendly, but also effectively reduces treatment cost.