A kind of pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and preparation method thereof

A heavy metal ion, chelating resin technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problem of simultaneous removal of various heavy metal ions with reduced adsorption capacity, and achieve significant economic and environmental benefits. Good hydrophilicity and the effect of accelerating the adsorption rate

Active Publication Date: 2022-02-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problems that the existing ion exchange resins or chelating resins have significantly reduced adsorption capacity in strong acid and high salt environments or are not suitable for simultaneous removal of various heavy metal ions, the present invention provides a broad-spectrum, used for the removal of strong acid wastewater Pyridinium amine chelating resin of heavy metal cation and preparation method thereof

Method used

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  • A kind of pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and preparation method thereof
  • A kind of pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and preparation method thereof
  • A kind of pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and preparation method thereof

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Effect test

Embodiment 1

[0045] Embodiment 1: a kind of pyridine amine chelating resin and preparation method thereof for removing heavy metal cations in strongly acidic waste water, its steps are:

[0046] (a) Add 150mL of an aqueous solution containing 4wt% gelatin and 15wt% NaCl to a 500mL three-neck flask equipped with a stirrer and a reflux condenser, heat up to 40°C at a stirring speed of 80rpm, and keep for 1h;

[0047] (b) Add an oil phase composed of 25g methyl acrylate, 5g divinylbenzene, 55mL toluene and 2g azobisisobutyronitrile to the three-necked flask of step (a) at a stirring speed of 60rpm, adjust the stirring speed, and control the oil phase. The bead size ranges from 50-300μm, then heat up to 60°C at a rate of 4°C / min, polymerize for 10 hours, then heat up to 75°C, polymerize for 10 hours, continue to heat up to 90°C, polymerize for 10 hours, then heat up to 110°C , Polymerization reaction 15h. The reaction product was extracted with ethanol through a Soxhlet extractor for 18 hours...

Embodiment 2

[0050] Embodiment 2: a kind of pyridine amine chelating resin and preparation method thereof for removing heavy metal cations in strongly acidic waste water, its steps are:

[0051] (a) Add 150mL of an aqueous solution containing 4wt% gelatin and 15wt% NaCl to a 500mL three-neck flask equipped with a stirrer and a reflux condenser, heat up to 40°C at a stirring speed of 80rpm, and keep for 1h;

[0052] (b) Add an oil phase composed of 25g methyl acrylate, 5g divinylbenzene, 55mL toluene and 2g azobisisobutyronitrile to the three-necked flask of step (a) at a stirring speed of 60rpm, adjust the stirring speed, and control the oil phase. The bead size ranges from 50-300μm, then heat up to 60°C at a rate of 4°C / min, polymerize for 10 hours, then heat up to 75°C, polymerize for 10 hours, continue to heat up to 90°C, polymerize for 10 hours, then heat up to 110°C , Polymerization reaction 15h. The reaction product was extracted with ethanol through a Soxhlet extractor for 18 hours...

Embodiment 3

[0055] Embodiment 3: a kind of pyridine amine chelating resin and preparation method thereof for removing heavy metal cations in strongly acidic waste water, its steps are:

[0056] (a) Add 150mL of an aqueous solution containing 4wt% gelatin and 15wt% NaCl to a 500mL three-neck flask equipped with a stirrer and a reflux condenser, heat up to 40°C at a stirring speed of 80rpm, and keep for 1h;

[0057] (b) Add an oil phase composed of 25g methyl acrylate, 5g divinylbenzene, 55mL toluene and 2g azobisisobutyronitrile to the three-necked flask of step (a) at a stirring speed of 60rpm, adjust the stirring speed, and control the oil phase. The bead size ranges from 50-300μm, then heat up to 60°C at a rate of 4°C / min, polymerize for 10 hours, then heat up to 75°C, polymerize for 10 hours, continue to heat up to 90°C, polymerize for 10 hours, then heat up to 110°C , Polymerization reaction 15h. The reaction product was extracted with ethanol through a Soxhlet extractor for 18 hours...

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Abstract

The invention discloses a pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and a preparation method thereof, belonging to the field of water treatment; the structural unit of the pyridine amine chelating resin of the present invention is as follows: wherein, x Represents the number of units of the o-picoline amine structure, x≥1, n represents the number of structural units of the resin macromolecular skeleton, 800≤n≤5000, R 1 Indicates H or alkyl chain CH 3 The applicable heavy metal cation of the present invention comprises Cd (II), Ni (II), Cu (II), Zn (II), Co (II) etc.; The preparation raw material source of pyridine amine chelating resin provided by the present invention is extensive , low cost, simple synthesis steps, and easy large-scale production.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and a preparation method thereof. Background technique [0002] Most industrial activities related to heavy metals, such as mining and non-ferrous metal smelting, steel pickling, leaching and detoxification of solid waste containing heavy metals, etc., will produce a large amount of strongly acidic heavy metal wastewater, whose pH value is generally lower than 3.0. This type of wastewater not only contains complex heavy metal ions such as copper, nickel, zinc, and cadmium, but may also contain high concentrations of inorganic salts such as sodium sulfate and magnesium chloride. Due to its low pH value and complex heavy metal composition, strongly acidic heavy metal wastewater is more likely to seep through pipelines, and has greater potential environmental and health hazar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C08F220/14C08F212/36C08F8/32C02F1/28C02F101/20
CPCB01J20/265C02F1/285C08F220/14C08F8/32B01J2220/4812C02F2101/20C08F212/36
Inventor 刘福强刘自成吕盈知徐晓明李杰李爱民
Owner NANJING UNIV
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