Method for ultrasonic self-cleaning arsenic removal in waste acid
一种超声波、污酸的技术,应用在化学仪器和方法、水污染物、水/污泥/污水处理等方向,能够解决石膏渣处理费用高、酸耗量和水耗量大、除砷工艺成本高等问题,达到经济效益和环境效益提高、减少石灰渣的生成、反应时间缩短的效果
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Embodiment 1
[0079] Take 100mL of dirty acid solution and add it into the reaction kettle and stir to preheat to 35°C. The main component of dirty acid is As (as H 3 AsO 3 form) 735mg / L, Cl (as Cl - form) 1320mg / L, Pb (as Pb 2+ form) 116mg / L, Cd (as Cd 2+ form) 101.7mg / L, Cu (as Cu 2+ form) 2.86mg / L, F (in the form of F - form) 456mg / L, pH=1.2;
[0080] Use the ultrasonic device described in the present invention to add ultrasonic strengthening treatment to the dirty acid, the ultrasonic power is 100W, the temperature of the dirty acid is maintained at 35°C, and the ultrasonic strengthening reaction is completed in 30 minutes to obtain a solid-liquid mixture;
[0081] The above-mentioned solid-liquid mixture is suction-filtered to obtain the filtrate and filter residue, and the content of arsenic in the filtrate is measured, and As (as H 3 AsO 3 form) 0.44mg / L; in the above reaction process, the removal rate of arsenic was 99.94%.
Embodiment 2
[0083] Take 100mL of dirty acid solution and add it into the reaction kettle and stir to preheat to 35°C. The main component of dirty acid is As (as H 3 AsO 3 Form) 790mg / L, Cl (as Cl - form) 1025mg / L, Pb (as Pb 2+ form) 198mg / L, Cd (as Cd 2 + form) 98mg / L, Cu (as Cu 2+ form) 4.57mg / L, F (in the form of F - form) 502mg / L, pH=1.0;
[0084] Use the ultrasonic device described in the present invention to add ultrasonic strengthening treatment to the dirty acid, the ultrasonic power is 100W, the temperature of the dirty acid is maintained at 35°C, and the ultrasonic strengthening reaction is completed in 30 minutes to obtain a solid-liquid mixture;
[0085] The above-mentioned solid-liquid mixture is suction-filtered to obtain the filtrate and filter residue, and the content of arsenic in the filtrate is measured, and As (as H 3 AsO 3 form) 1.3mg / L; in the above reaction process, the removal rate of arsenic was 99.83%.
Embodiment 3
[0087] Take 100mL of dirty acid solution and add it into the reaction kettle and stir to preheat to 35°C. The main component of dirty acid is As (as H 3 AsO 3 form) 525mg / L, Cl (as Cl - form) 1103mg / L, Pb (as Pb 2+ form) 156mg / L, Cd (as Cd 2+ form) 86.5mg / L, Cu (as Cu 2+ form) 0.86mg / L, F (in the form of F - form) 598mg / L, pH=1.5;
[0088] Use the ultrasonic device of the present invention to add ultrasonic waves to strengthen the dirty acid, the power of the ultrasonic wave is 100W, the temperature of the dirty acid is maintained at 35°C, and the ultrasonic strengthening reaction is completed in 30 minutes to obtain a solid-liquid mixture;
[0089] The above-mentioned solid-liquid mixture is suction-filtered to obtain the filtrate and filter residue, and the content of arsenic in the filtrate is measured, and As (as H 3 AsO 3 form) 0.37mg / L; in the above reaction process, the removal rate of arsenic was 99.93%.
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