Preparation Of Dyeing Sludge Coke Micro Electrolytic Materials And Degradation Of Organic Antimony Pollutants Micro

China is the largest textile printing and dyeing producer.With the improvement of national environmental protection requirements for printing and dyeing industry,the resource disposal of textile printing and dyeing sludge and the removal of residual organic antimony pollutants in production sewage have become urgent problems to be solved in this industry.Therefore,this paper puts forward the idea of closed loop synchronous treatment of printing and dyeing wastewater and sludge: a new type of micro-electrolytic material for removing organic antimony pollutants from textile printing and dyeing sludge water pyrolysiscarbonation is used as raw material.In this paper,(1)the preparation of iron-carbon microelectrolysis ceramsite material(MECF)by using the sludge coke after pyrolysis and carbonization of the printing and dyeing sludge water and the recovery of iron powder are mainly studied,and the process flow and the preparation parameters of the MECF are optimized.(2)The properties of iron-carbon micro-electrolysis materials were improved by cobalt powder and copper powder.Iron-cobalt catalytic micro-electrolysis materials(Fe-CoCME)and iron-copper catalytic micro-electrolysis materials(Fe-Cu-CME)were further prepared.(3)The degradation performance and reaction kinetics model of three kinds of internal electrolytic materials MECF,Fe-Co-CME and Fe-Cu-CME for simulated organic antimony pollutants were studied,and the long-term operation mechanism of MECF,Fe-CoCME and Fe-Cu-CME materials was evaluated by continuous operation experiment.The results show that,(1)when the iron content is 35%,the iron-carbon volume ratio is 1:2.5,the sintering temperature is 900℃,the sintering time is 2h,the MECF is fired,the bulk density is 1113.95kg/ m3,the particle density is 2548.58kg/ m3,the water absorption rate of the 24 h is 22.90%,the Vickers hardness is 225 HV,and the simulated organic antimony wastewater with the initial p H=3,The removal rate of CODCr and Sb was 53.15% and 59.51%,respectively,after 3 h of reaction.(2)The ratio of Fe/ Co to the specific surface area of Fe-CoCME and the specific surface area ratio of Fe/ Cu is 4%,and the degradation effect of the ceramsite on the organic antimony wastewater can be further improved,and the removal rate of the CODCr and the Sb is 64.25%/ 70.82%,62.92%/ 68.24%,respectively.(3)The degradation kinetics of the simulated antimony wastewater by MECF,Fe-Co-CME and Fe-Cu-CME were discussed.The activation energy(Ea)of the degradation of CODCr(or Sb)in the simulated organic antimony printing and dyeing wastewater was 14.260 k J/mol(12.788 k J/mol),11.770 k J/mol(11.049 k J/mol)and 27.328 k J/mol(19.049 k J/mol)respectively.(4)MECF,Fe-Co-CME and Fe-Cu-CME were better than that of CODCr,and the performance of the three kinds of ceramsites was Fe-Co-CME > Fe-Cu-CME > MECF.The results showed that the service life of Fe-Co-CME and Fe-Cu-CME was better than that of the MECF.The implementation of the back-flushing process will be a supportability measure for the three materials to keep the long-acting operation effect.