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Modified peanut shell Pb(II) adsorbent, and preparation method and application thereof

A technology of peanut shells and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of insufficient resource utilization of peanut shells, achieve cheap raw materials, simple preparation, and Easy to get effect

Inactive Publication Date: 2013-05-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the insufficient resource utilization of peanut shells in the prior art, and the technical deficiency of peanut shell modification as a Pb (II) ion adsorbent, The invention provides a modified peanut shell Pb (II) adsorbent and its preparation method and application, the modified peanut shell Pb (II) adsorbent prepared by the present invention can fully adsorb Pb (II) in waste water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Fresh shelled peanuts were collected from a market in Nanjing, the kernels were removed and the shells were kept. The peanut shells were washed and dried, and then dried in an oven at 65°C for 24 hours. Grind the dried peanut shells into powder with a pulverizer and pass through an 80-mesh sieve. The sieved peanut shell powder was soaked in NaOH solution with a mass percentage of 17.5% for 48 hours to remove floating color and impurities. After that, it was washed with deionized water until neutral, and dried in an oven at 65° C. to obtain mercerized peanut shell powder.

[0029] Mix 10g mercerized peanut shell powder with 30ml epichlorohydrin, 30ml ethanol, 100ml NaOH solution (5% by mass), react at 50°C for 5h, filter, wash with water, and dry in a 60°C oven. Epoxy cellulose ether intermediates were obtained. Take 6g epoxy cellulose ether intermediate with 9ml ethylenediamine, 150ml water, 1g NaCO 3 , 30ml of ethanol was reacted at 50°C for 2 hours, filtered, washe...

Embodiment 2

[0032] Collect fresh peanuts with shells from a market in Nanjing, remove the kernels and keep the shells, wash the peanut shells, dry them, and dry them in an oven at 50 °C for 24 hours. Grind the dried peanut shells into powder with a pulverizer and pass through a 70-mesh sieve. The sieved peanut shell powder was soaked in a 15% NaOH solution for 24 hours to remove floating color and impurities. Then, washed with deionized water until neutral, and dried in an oven at 70° C. to obtain mercerized peanut shell powder.

[0033]Mix 10g of mercerized peanut shell powder with 20ml of epichlorohydrin, 20ml of ethanol, and 80ml of NaOH solution (2% by mass), react at 40°C for 6h, filter, wash with water, and dry in an oven at 50°C. Epoxy cellulose ether intermediates were obtained. Take 6g epoxy cellulose ether intermediate and 12ml ethylenediamine, 120ml water, 0.48g NaCO 3 1. 24ml of ethanol was reacted at 70°C for 3 hours, filtered, washed with water until neutral, and dried in...

Embodiment 3

[0036] Fresh shelled peanuts were collected from a market in Nanjing, the shells were removed, the shells were washed and dried, and dried in an oven at 70°C for 24 hours. Powder the dried peanut shells with a pulverizer and pass through a 90-mesh sieve. The sieved peanut shell powder was soaked in 20% NaOH solution for 72 hours to remove floating color and impurities. Afterwards, wash with deionized water until neutral, and dry in an oven at 50° C. to obtain mercerized peanut shell powder.

[0037] Mix 10g of mercerized peanut shell powder with 40ml of epichlorohydrin, 40ml of ethanol, and 120ml of NaOH (15% by mass), react at 60°C for 4h, filter, wash with water, and dry in an oven at 70°C to obtain Epoxy cellulose ether intermediate. Take 6g epoxy cellulose ether intermediate and 18ml ethylenediamine, 180ml water, 1.5g NaCO 3 , 36ml of ethanol was reacted at 64°C for 2.5 hours, filtered, washed with water until neutral, and dried in an oven at 50°C to obtain the modified...

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Abstract

The invention discloses a modified peanut shell Pb(II) adsorbent, and a preparation method and an application thereof, belonging to the technical field of treatment of heavy metal waste water. The method comprises the following steps of: (A) washing peanut shells, airing, drying and smashing with a smasher; (B) soaking peanut shell powder into a NaOH solution, washing to be neutral with water, and drying; (C) mixing mercerized peanut shell powder, epoxy chloropropane, ethanol and the NaOH solution, reacting at the temperature of 40-60 DEG C for 4-6 hours, filtering, washing with water, and drying in a drying oven of which the temperature is 50-70 DEG C; and (D) reacting an epoxy cellulose ether intermediate with ethylene diamine, water, NaCO3 and ethanol under the condition of 50-70 DEG C for 2-3 hours, filtering, washing to be neutral with water, and drying in a drying oven of which the temperature is 50-70 DEG C to obtain the modified peanut shell Pb(II) adsorbent. The modified peanut shell Pb(II) adsorbent is easy to prepare and industrialize; and moreover, the modified peanut shell Pb(II) adsorbent containing amino groups is prepared by grafting amines onto the surfaces of peanut shells, so that the removing rate of Pb(II) in water is increased, and the adsorption rate is over 30.0 percent.

Description

technical field [0001] The invention relates to a modified peanut shell Pb(II) adsorbent and a preparation method thereof, belonging to the technical field of heavy metal wastewater treatment, in particular to a modified peanut shell as a raw material for adsorbing Pb(II) in wastewater Adsorbents and their preparation methods and applications. Background technique [0002] Pb is one of the important polluting metals in the environment. Its pollution sources are extensive. Man-made pollution mainly includes power plant emissions, coal combustion, metallurgy, coal mining, and traffic emissions. Pb pollution is not only detrimental to human health, but also affects children's intellectual growth, and high levels of Pb can lead to acute poisoning of humans. Studies have shown that when adults take an average of 0.3-0.6mg of Pb, about 10% of the remaining content remains in the body, which seriously damages the kidneys, liver, reproductive system, cell regeneration and brain fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 丁竹红于芮胡忻张宇峰尹大强
Owner NANJING UNIV OF TECH
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