Experimental Study on the Recovery of Palladium from Industrial Wastewater
Palladium wastewater is inevitably generated in the production of palladium based catalysts,for low content palladium wastewater,traditional palladium recovery methods take a long time to recover and have high costs.For low content palladium wastewater,precipitation method,hydrochloric acid direct pH adjustment method,hydrazine hydrate reduction method,and resin adsorption method are used for recovery.The results show that the precipitation method is suitable for treating wastewater with palladium content not exceeding 1 mg/L,and the recovery rate reaches 90%;the use of hydrochloric acid direct pH adjustment method and hydrazine hydrate reduction method to treat palladium wastewater results in a decrease in palladium content in the effluent,but it does not meet the discharge requirements of the enterprise(not exceeding 0.1 mg/L);the resin adsorption method is suitable for treating wastewater with palladium content not exceeding 10 mg/L,with a recovery rate of 99%.
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