We developed an activated charcoal by creating bamboo charcoal that was carbonised at a temperature between 400 to 1000°C and then kept it at a temperature of 270°C for 2 h. One gram of activated charcoal was added to 100 mL of aqueous caesium of 2.67 × 10-2 mmol/L and 100 mL of strontium aqueous solution, and was stirred for 1 h. The caesium adsorption amount of bamboo charcoal, which was carbonised at 400°C, increased from 70.0% to 88.9%. In addition, the amount of strontium absorbed increased from 76.5%

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