Method for preparing carbon adsorbing material used for efficiently removing harmful ions from waste water

[0014] Weigh 6g of glucose and 1g of thioglycolic acid, mix the two evenly, add appropriate amount of water, place in a stainless steel autoclave lined with polytetrafluoroethylene, and react in an oven at 180°C for a period of time. Take out and cool, grind the obtained solid substance, wash with deionized water and ethanol, filter with suction, and dry the obtained product overnight. The content of surface carboxyl groups measured by acid-base titration is 4.13mmol / g. The content of S was found to be 2.63mmol / g by EDS analysis. The adsorption capacity for adsorbing Hg(II) ions at pH=1.5 is 300 mg / g.

[0016] Weigh 6g of furfural and 3g of cysteine, mix the two evenly, add appropriate amount of water, place in a stainless steel autoclave lined with polytetrafluoroethylene, and react in an oven at 180°C for a period of time. Take out and cool, grind the obtained solid substance, wash with deionized water and ethanol, filter with suction, and dry the obtained product overnight. The content of surface carboxyl groups measured by acid-base titration is 4.30mmol / g. The content of S was found to be 4.0 mmol / g by EDS analysis. The adsorption capacity for adsorbing lead ions at pH=6 is 145mg / g.

[0018] Weigh 6g of sucrose and 1g of lysine, mix the two evenly, add appropriate amount of water, place in a stainless steel autoclave lined with polytetrafluoroethylene, and react in an oven at 200°C for a period of time. Take out and cool, grind the obtained solid substance, wash with deionized water and ethanol, filter with suction, and dry the obtained product overnight. The content of amino groups on the surface was determined to be 2.2 mmol / g by acid-base titration. The adsorption capacity for Cu(II) ions is 130 mg / g when pH=4, and the adsorption capacity for chromate is 200 mg / g when pH=7.