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Preparation of chitosan-based adsorption agent and application of chitosan-based adsorption agent to heavy metal ion wastewater treatment

A technology for heavy metal ions and chitosan, which is applied in the fields of adsorption water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc.

Active Publication Date: 2016-06-29
上海森臻环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, chemical initiation produces secondary pollution due to the addition of new chemical reagents; radiation initiation and photoinitiation devices are relatively expensive, post-processing is cumbersome, and energy loss is large, which severely limits their further promotion and use

Method used

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  • Preparation of chitosan-based adsorption agent and application of chitosan-based adsorption agent to heavy metal ion wastewater treatment
  • Preparation of chitosan-based adsorption agent and application of chitosan-based adsorption agent to heavy metal ion wastewater treatment
  • Preparation of chitosan-based adsorption agent and application of chitosan-based adsorption agent to heavy metal ion wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 0.5gCTS and 40mL distilled water into a 250mL three-neck flask, stir at 75°C for about 5min to fully disperse; add 0.06gMBA, 8mLAA and 2gAMPS after cooling down to room temperature, stir for 10min (stirring speed 100r / min); turn on the power , using GDEP at 480V, 85mA glow discharge for 3min; stop the discharge, continue to stir in an oil bath at 75°C for 4h, then cool to obtain a jelly-like gel; cut it to a diameter of 2~5mm, neutralize it with NaOH to make the neutralization degree reach 60%, wash with water to remove unreacted raw materials, place in a vacuum oven, dry at 65°C, and grind to obtain CTS / P (AA-co-AMPS) adsorbent.

[0053] Adsorption performance: The adsorption reaches equilibrium in 180 minutes. For solution (300mg / L) Cd 2+ 、Cu 2+ 、Ni 2+ , Pb 2+ The adsorption capacity of each is 367, 297, 170, 787mg / g.

Embodiment 2

[0055] Add 0.9gCTS and 40mL distilled water into a 250mL three-neck flask, stir at 75°C for about 5min to fully disperse; add 0.04gMBA, 8mLAA and 2gAMPS after cooling down to room temperature, stir for 10min to fully dissolve; then turn on the power, use GDEP was glow-discharged at 450V and 57mA for 5min; stop the discharge, continue to stir in an oil bath at 75°C for 4h, then cool to obtain a jelly-like gel; cut it to a diameter of 2-5mm, and neutralize it with NaOH to reach 70%; washed with water to remove unreacted raw materials, dried in a vacuum oven at 65°C, and ground to obtain CTS / P (AA-co-AMPS) adsorbent.

[0056] Adsorption performance: The adsorption reaches equilibrium in 180 minutes, and the Cd in the solution (300mg / L) 2+ 、Cu 2+ 、Ni 2+ , Pb 2+ The adsorption capacity of each is 330, 292, 183, 780mg / g.

Embodiment 3

[0058] Add 0.9gCTS and 40mL distilled water into a 250mL three-neck flask, stir at 75°C for about 5min to fully disperse; add 0.06gMBA, 8mLAA and 2gAMPS and stir for 10min to fully dissolve; turn on the power, use GDEP to Glow discharge at 430V, 45mA for 2min; stop the discharge, continue to stir in an oil bath at 75°C for 4h, then cool to obtain a jelly-like gel; cut into pieces to a diameter of 2~5mm, neutralize with NaOH to reach a neutralization degree of 90% ; Wash with water to remove unreacted raw materials, dry in a vacuum oven at 65° C., and grind to obtain CTS / P (AA-co-AMPS) adsorbent.

[0059] Adsorption performance: The adsorption reaches equilibrium in 180 minutes, and the (300mg / L) Cd in the solution 2+ 、Cu 2+ 、Ni 2+ , Pb 2+ The adsorption capacity of each is 383, 280, 360, 797mg / g.

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Abstract

The invention provides a chitosan-based adsorption agent capable of selectively separating heavy metal ions in the water environment and belongs to the technical fields of composite materials and water environment purification.Chitosan, 2-acryloylamino-2-methyl-1-propanesulfonic acid and acrylic acid serve as raw materials, N,N'-methylene bisacrylamide serves as a cross-linking agent, and the chitosan-based adsorption agent is prepared in one step in an aqueous solution through induced polymerization of glow discharge electrolysis plasmas.Experiments show that the prepared chitosan-based adsorption agent has high adsorption speed and high adsorption amount on Pb2+, Cd2+, Cu2+ and Ni2+ in water.Under coexistence of Pb2+, Cd2+, Cu2+ and Ni2+, the adsorption agent can be used for selectively enriching, separating and recycling Pb2+ in a mixed solution, and accordingly the adsorption agent has excellent performance of selectively separating lead in the water environment.Meanwhile, the adsorption agent can be used for desorption and reuse in an EDTA-4Na solution.

Description

technical field [0001] The invention relates to a chitosan-based adsorbent, in particular to a chitosan-based adsorbent for selectively separating heavy metal ions in a water environment and a preparation method thereof, belonging to the technical field of composite materials and water environment purification. Background technique [0002] Water is one of the essential substances for human survival and development. However, due to the development of industry and agriculture, the problem of heavy metal pollution in waters has become increasingly prominent. Heavy metals in waters mainly come from many industries such as chemical industry, electroplating, metallurgy, food, leather, printing and dyeing. The direct discharge of harmful heavy metals in wastewater such as cadmium, lead, nickel, copper, manganese, zinc, etc. will cause serious environmental pollution and endanger human health. Therefore, how to remove heavy metal ions in wastewater has attracted widespread attentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCB01J20/24B01J20/26C02F1/285C02F1/286C02F1/288C02F2101/20
Inventor 俞洁郑继东陆泉芳李芸杨恕修
Owner 上海森臻环保设备有限公司
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