2.1. Leaching tests
The leaching tests were carried out in a conical flask with HCl
solution, and temperature was thermostatically controlled by an
electro-thermostatic water cabinet (DK-8D, Shanghai Medical
Thermostatic Manufacture, PR China). Agitation was conducted by
employing a mechanical stirrer (Jy2002, Hangzhou Instrument
Electrics Co., Ltd, PR China). After leaching tests, the leaching solution
was obtained through filtration, and the content of Al was
determined using visible spectrophotometric analysis.
2.1. Leaching testsThe leaching tests were carried out in a conical flask with HClsolution, and temperature was thermostatically controlled by anelectro-thermostatic water cabinet (DK-8D, Shanghai MedicalThermostatic Manufacture, PR China). Agitation was conducted byemploying a mechanical stirrer (Jy2002, Hangzhou InstrumentElectrics Co., Ltd, PR China). After leaching tests, the leaching solutionwas obtained through filtration, and the content of Al wasdetermined using visible spectrophotometric analysis.
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