Experimental Study On Treatment To Heavy Metals In Wastwater Of Copper Metallurgy By Iron-carbon Micro-electrolysis Catalytic Deoxidization Method

Nowadays, the most usual ways to treat wastwater of copper metallurgy is antacid method such as lime method, however, this kind of ways produce a lage number of sediment,making it difficult to reuse and leading to a second-time pollution. Further more,it makes it difficult to reuse because of a high rigidity. The treatment to wastewater has become a pivotal factor to the copper-smelt factory.Iron-Carbon micro-electrolysis catalytic deoxidization method strengthens the deoxidize capability and the reacting speed by adding active carbon to the iron scraps to make up a micro-batteries,so that strengthen the effect of removment of some metal ions.The experiment makes a compare between Iron-Carbon micro-electrolysis treatment and iron treatment. In order to research the efficiency of treatment and the effect factor to single Cu2+,Pb2+,Zn2+.The experiment adopted single simulant wastewater as well as factual wast water of Yunnan copper-melting factory.The result shows that Iron-Carbon micro-electrolysis method has a much better efficiency of treatment than single iron scraps method with a removal ratio to Cu2+,Pb2+,Zn2+of 94.7%,78.8%,58% in simulant wastewater and 95.61%,91.8%,70.9% in factual wastewater. The the optimal operating conditions for Iron-Carbon micro-electrolysis method to treat factual wastewater were obtained as follows:the pH is 3, the total weight of iron craps and active cabon is 5g/0.1L,the Fe/C is 1,no aeration,and the reacting time is 30 min.The dissertation analyzes the hydroxyl complex ions and solubility in different pH accordint to the theory of hydroxyl complex ions,balance. In order to fatherly analyze the mechanism of reaction, the author made some analysis such as SEM&EDS,XPS,XRD to the iron craps and active carbon after reacting.Iron-Carbon micro-electrolysis catalytic deoxidization method had presented good experimental effect to heavy metals in wastewater of copper metallurgy. There are some theoretical and realistical value.it will play a positive role in the treatment of copper metallurgy wastewater in our country.