Method for preparing adsorbent from straw

Abstract

The invention discloses a method for preparing an adsorbent from straw, belonging to the technical field of straw utilization. The adsorbent prepared from corn straw and the like has a good adsorptioneffect on heavy metal ions such as Cd (II), Pb (II) and the like, and is high in desorption rate and high in reproducibility. According to the invention, sesame stalks, clamshells and corn stalks arepuffed after being activated by steam, so the inner structure of the above raw materials can be completely opened, which is beneficial for complete immersion of yeast liquid; then fermentation is performed, the fermented raw materials have porous structures and improved porosity; and carbonization is cooperatively conducted to harden a skeleton structure, so the obtained adsorbent has the characteristics of good porosity, good specific surface area, good mechanical properties and improved regeneration performance.

Description

technical field

[0001] The invention belongs to the technical field of straw utilization, in particular to a method for preparing an adsorbent by utilizing straw. Background technique

[0002] The main component of crop straw is cellulose-based carbon compounds. Using biorefinery technology to convert agricultural waste such as straw into new materials and energy, not only solves the environmental pollution problem caused by the incineration of agricultural waste such as straw, but also can replace Traditional forest wood materials and fossil energy. At present, the use of straw to prepare adsorbents for the adsorption of heavy metal ions in sewage has received more and more attention.

[0003] Patent CN 106390939 B discloses a heavy metal ion adsorbent, which is prepared by modifying the carbon material obtained by pyrolysis and carbonization of municipal solid waste. However, the adsorption performance of the prepared adsorbent is weak, and the removal efficiency of heavy...

Examples

Embodiment 1

[0018] A kind of method utilizing straw to prepare adsorbent, comprises the following steps:

[0019] (1) Fermentation carbonization treatment

[0020] Fumigate 26 parts of sesame stalks, 14 parts of mussel shells, and 23 parts of corn stalks in parts by weight with steam at 115°C for 35 minutes, then pulverize them, transfer them to an extruder for puffing, and after puffing, spray mass Yeast solution with a fraction of 8% to make it fully moisture-permeable, then fermented at 38°C and 44% humidity for 5 hours, then put the resultant into a carbonization furnace, carbonized at 930°C for 8 hours, and cooled it in Microwave at 1100W for 6 minutes, cool down, and set aside;

[0021] (2) Magnetization treatment

[0022] Disperse 40 parts of the product obtained in step (1) into ethylene glycol, and after ultrasonic treatment at 43KHz for 18 minutes, add 11 parts of ferric chloride, 23 parts of sodium acetate, and 6 parts of polyethylene glycol, and then stir at 400 rpm for 40 m...

Embodiment 2

[0029] A kind of method utilizing straw to prepare adsorbent, comprises the following steps:

[0030] (1) Fermentation carbonization treatment

[0031] Fumigate 26 parts of sesame stalks, 14 parts of mussel shells, and 23 parts of corn stalks in parts by weight with steam at 115°C for 35 minutes, then pulverize them, transfer them to an extruder for puffing, and after puffing, spray mass Yeast solution with a fraction of 8% to make it fully moisture-permeable, then fermented at 38°C and 44% humidity for 5 hours, then put the resultant into a carbonization furnace, carbonized at 930°C for 8 hours, and cooled it in Microwave at 1100W for 6 minutes, cool down, and set aside;

[0032] (2) Magnetization treatment

[0033] Disperse 40 parts of the product obtained in step (1) into ethylene glycol, and after ultrasonic treatment at 43KHz for 18 minutes, add 11 parts of ferric chloride, 23 parts of sodium acetate, and 6 parts of polyethylene glycol, and then stir at 400 rpm for 40 m...

Embodiment 3

[0038] A kind of method utilizing straw to prepare adsorbent, comprises the following steps:

[0039] (1) Fermentation carbonization treatment

[0040] Fumigate 26 parts of sesame stalks, 14 parts of mussel shells, and 23 parts of corn stalks in parts by weight with steam at 115°C for 35 minutes, then pulverize them, transfer them to an extruder for puffing, and after puffing, spray mass Yeast solution with a fraction of 8% to make it fully moisture-permeable, then fermented at 38°C and 44% humidity for 5 hours, then put the resultant into a carbonization furnace, carbonized at 930°C for 8 hours, and cooled it in Microwave at 1100W for 6 minutes, cool down, and set aside;

[0041] (2) Magnetization treatment

[0042]Disperse 40 parts of the product obtained in step (1) into ethylene glycol, and after ultrasonic treatment at 43KHz for 18 minutes, add 11 parts of ferric chloride, 23 parts of sodium acetate, and 6 parts of polyethylene glycol, and then stir at 400 rpm for 40 mi...

technical field

[0001] The invention belongs to the technical field of straw utilization, in particular to a method for preparing an adsorbent by utilizing straw. Background technique

[0002] The main component of crop straw is cellulose-based carbon compounds. Using biorefinery technology to convert agricultural waste such as straw into new materials and energy, not only solves the environmental pollution problem caused by the incineration of agricultural waste such as straw, but also can replace Traditional forest wood materials and fossil energy. At present, the use of straw to prepare adsorbents for the adsorption of heavy metal ions in sewage has received more and more attention.

[0003] Patent CN 106390939 B discloses a heavy metal ion adsorbent, which is prepared by modifying the carbon material obtained by pyrolysis and carbonization of municipal solid waste. However, the adsorption performance of the prepared adsorbent is weak, and the removal efficiency of heavy...

Examples

Embodiment 1

[0018] A kind of method utilizing straw to prepare adsorbent, comprises the following steps:

[0019] (1) Fermentation carbonization treatment

[0020] Fumigate 26 parts of sesame stalks, 14 parts of mussel shells, and 23 parts of corn stalks in parts by weight with steam at 115°C for 35 minutes, then pulverize them, transfer them to an extruder for puffing, and after puffing, spray mass Yeast solution with a fraction of 8% to make it fully moisture-permeable, then fermented at 38°C and 44% humidity for 5 hours, then put the resultant into a carbonization furnace, carbonized at 930°C for 8 hours, and cooled it in Microwave at 1100W for 6 minutes, cool down, and set aside;

[0021] (2) Magnetization treatment

[0022] Disperse 40 parts of the product obtained in step (1) into ethylene glycol, and after ultrasonic treatment at 43KHz for 18 minutes, add 11 parts of ferric chloride, 23 parts of sodium acetate, and 6 parts of polyethylene glycol, and then stir at 400 rpm for 40 m...

Embodiment 2

[0029] A kind of method utilizing straw to prepare adsorbent, comprises the following steps:

[0030] (1) Fermentation carbonization treatment

[0031] Fumigate 26 parts of sesame stalks, 14 parts of mussel shells, and 23 parts of corn stalks in parts by weight with steam at 115°C for 35 minutes, then pulverize them, transfer them to an extruder for puffing, and after puffing, spray mass Yeast solution with a fraction of 8% to make it fully moisture-permeable, then fermented at 38°C and 44% humidity for 5 hours, then put the resultant into a carbonization furnace, carbonized at 930°C for 8 hours, and cooled it in Microwave at 1100W for 6 minutes, cool down, and set aside;

[0032] (2) Magnetization treatment

[0033] Disperse 40 parts of the product obtained in step (1) into ethylene glycol, and after ultrasonic treatment at 43KHz for 18 minutes, add 11 parts of ferric chloride, 23 parts of sodium acetate, and 6 parts of polyethylene glycol, and then stir at 400 rpm for 40 m...

Embodiment 3

[0038] A kind of method utilizing straw to prepare adsorbent, comprises the following steps:

[0039] (1) Fermentation carbonization treatment

[0040] Fumigate 26 parts of sesame stalks, 14 parts of mussel shells, and 23 parts of corn stalks in parts by weight with steam at 115°C for 35 minutes, then pulverize them, transfer them to an extruder for puffing, and after puffing, spray mass Yeast solution with a fraction of 8% to make it fully moisture-permeable, then fermented at 38°C and 44% humidity for 5 hours, then put the resultant into a carbonization furnace, carbonized at 930°C for 8 hours, and cooled it in Microwave at 1100W for 6 minutes, cool down, and set aside;

[0041] (2) Magnetization treatment

[0042]Disperse 40 parts of the product obtained in step (1) into ethylene glycol, and after ultrasonic treatment at 43KHz for 18 minutes, add 11 parts of ferric chloride, 23 parts of sodium acetate, and 6 parts of polyethylene glycol, and then stir at 400 rpm for 40 mi...