Abstract: The present disclosure discloses a strain of Acidomyces acidothermus and its application in leaching copper-containing pollutants from waste circuit boards, belonging to the technical field of bio-leaching. According to the present disclosure, a strain of A. acidothermus is separated from the sludge of a Changzhou sewage treatment plant; and the strain can normally grow under an acidic condition, and copper contained in a system can be leached out in a form of copper ions by adding the strain into waste or pollutants containing heavy metal copper, so that the metal copper in the waste or pollutants is effectively treated. The treatment process is simple, the requirements for the environment and the technology are low, and the treated waste liquid does not contain high-concentration chemical reagents, which facilitates subsequent waste liquid treatment; and therefore, the A. acidothermus is suitable for industrial application.

Abstract: The disclosure discloses a method for preparing cuprous chloride by high-value utilization of chloride ion-containing wastewater, belonging to the field of wastewater treatment. According to the disclosure, wastewater containing chloride ions is taken, and the pH is maintained at 2 to 3.5. Cuprous oxide is added by 50 to 80% of a theoretical amount of the cuprous oxide according to a Cl? concentration for reaction 8 to 15 min. Centrifugation is performed to obtain crude cuprous chloride and supernatant. Cuprous oxide is added to the resulting supernatant for reaction 8 to 15 min, and a total of cuprous oxide added in two reactions accounts for 90 to 100% of the theoretical amount. Centrifugation is performed after the reaction to obtain crude cuprous chloride. According to the method of the disclosure, the amount of cuprous oxide used is greatly reduced, and the purity of the cuprous chloride is improved.

Abstract: The disclosure discloses a method for high-value application of PTA residue high-concentration bromine-containing wastewater to preparation of cuprous bromide, belongs to the field of PTA residue treatment, and includes: firstly adjusting a pH value of the bromine-containing wastewater to 0.5-2, adding cuprous oxide in batches, taking a reaction for 3-20 min after the cuprous oxide is totally added to produce cuprous bromide, Solid liquid separation to obtain cuprous bromide, concentrating a liquid phase to recover inorganic salt while rest wastewater may be used as process water for application. By cuprous oxide addition and method regulation and control, a bromine removal rate is as high as 95% or higher, the cuprous bromide reaches yield of 90% or higher and purity of 95%. Meanwhile, sodium sulfate with the purity of 90% or higher may be obtained. High-value application of the PTA residue high-concentration bromine-containing wastewater is really realized.

Abstract: The present disclosure discloses an efficient and regenerable nano manganese remover, and a method for preparing same and application thereof, belonging to the technical field of wastewater treatment and reuse. The manganese remover of the present disclosure includes Fe3O4, RGO, SiO2 and EDTA. The Fe3O4 nanoparticles are supported on the surface of the RGO, the SiO2 coats the Fe3O4, and the EDTA is grafted on the SiO2. First, Fe3O4-RGO is prepared. Then, a TEOS-ethanol solution is dropwise added, and the resulting mixture is allowed to react to obtain Fe3O4@SiO2-RGO composite particles. Finally, an EDTA-water solution is dropwise added to obtain the manganese remover. The manganese remover prepared in the present disclosure is magnetic, and the preparation process is simple and easy for industrial production. The nano manganese remover can quickly remove manganese in manganese-containing wastewater. A small amount of the manganese remover can achieve a large adsorption capacity.