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Preparation method of novel difunctional resin matrix nanocomposite material, composite material and method for removing trivalent arsenic in depth of water body

A technology of nanocomposite materials and bifunctional resins, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, water/sewage treatment, etc., can solve the problem of large dosage of oxidant and poor recycling effect Good, poor effect and other problems, to achieve the effect of improving the removal ability

Active Publication Date: 2017-12-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problem that the existing As(III) removal materials have single function, poor As(III) removal effect, complex oxidant dosage and poor recycling effect of the engineered As(III) removal technology, the present invention provides A preparation method of a novel dual-functional resin-based nanocomposite material. The preparation method uses the principle of metal complexation to react Ce(IV) with excess nitrate to produce cerium nitrate complex anions, thereby changing the electrical exchange of Ce precursors to On the strongly basic anion exchange resin, the nano cerium oxide is evenly loaded into the matrix of the strong base anion exchange resin by alkali precipitation, realizing the organic combination of the matrix and the nano cerium oxide

Method used

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  • Preparation method of novel difunctional resin matrix nanocomposite material, composite material and method for removing trivalent arsenic in depth of water body
  • Preparation method of novel difunctional resin matrix nanocomposite material, composite material and method for removing trivalent arsenic in depth of water body
  • Preparation method of novel difunctional resin matrix nanocomposite material, composite material and method for removing trivalent arsenic in depth of water body

Examples

Experimental program
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Effect test

Embodiment 1

[0046] In a 500mL beaker, add 9.87g of ceric ammonium nitrate, 20mL of concentrated nitric acid (65% by weight), 17g of sodium nitrate, fully dissolve and set the volume to 100mL; the concentration of ceric ammonium nitrate in this solution A is 0.18mol / L, HNO 3 The concentration is 3mol / L, NaNO 3 The concentration is 2mol / L.

[0047] Weigh 5g of NaOH into a 100mL volumetric flask, and dilute to get solution B;

[0048] Weigh 5g of NaCl into a 100mL volumetric flask, and make it to volume to obtain solution C;

[0049] Weigh 5g of D201 resin (produced by Hangzhou Zhengguang Resin Factory), add it into solution A first, then stir it at a speed of 200rpm for 8 hours; Stir at a speed of 200rpm for 8 hours. After the mixing, the resin is filtered out and air-dried naturally, and then added to solution C, and stirred at a speed of 200rpm for 8 hours. After the mixing is completed, the resin is filtered out and washed with a large amount of water until The pH was neutral, and aft...

Embodiment 2

[0051] In a 500mL beaker, add 16.45g of ammonium cerium nitrate, 25mL of concentrated nitric acid (65% by weight), and 26g of sodium nitrate, fully dissolve and set the volume to 100mL; the concentration of ammonium cerium nitrate in this solution A is 0.3mol / L, HNO 3 The concentration is 3.6 mol / L, NaNO 3 The concentration is 3mol / L.

[0052] Weigh 10g of NaOH into a 100mL volumetric flask, and dilute to get solution B;

[0053] Weigh 10g of NaCl into a 100mL volumetric flask, and dilute to get solution C;

[0054] Weigh 10g of D201 resin (produced by Hangzhou Zhengguang Resin Factory), add it to solution A first, then stir it at a speed of 250rpm for 9 hours; Stir at a speed of 250rpm for 9 hours. After the mixing, the resin is filtered out and air-dried naturally, and then added to solution C, and stirred at a speed of 250rpm for 9 hours. After the mixing is completed, the resin is filtered out and washed with a large amount of water until The pH was neutral, and after w...

Embodiment 3

[0056] In a 500mL beaker, add 29.6g ammonium cerium nitrate, 35mL concentrated nitric acid (65% by weight), 42.5g sodium nitrate, fully dissolve and settle to 100mL; the concentration of ammonium cerium nitrate in this solution A is 0.54mol / L, HNO 3 The concentration is 5 mol / L, NaNO 3The concentration is 5mol / L.

[0057] Weigh 15g of NaOH into a 100mL volumetric flask, and dilute to get solution B;

[0058] Weigh 15g of NaCl into a 100mL volumetric flask, and dilute to get solution C;

[0059] Weigh 15g of D201 resin (produced by Hangzhou Zhengguang Resin Factory), add it into solution A first, and then stir it at a speed of 250rpm for 10 hours; Stir at a speed of 300rpm for 10 hours. After the mixing, the resin is filtered out and air-dried naturally, and then added to solution C, and stirred at a speed of 300rpm for 10 hours. After the mixing is completed, the resin is filtered out and washed with a large amount of water until The pH is neutral, and after washing with 1...

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Abstract

The invention discloses a preparation method of a novel difunctional resin matrix nanocomposite material, a composite material and a method for removing trivalent arsenic in the depth of a water body, belonging to the field of drinking water, industrial waste water and environmental function nanometer materials. The preparation method comprises the steps of taking strongly basic anion exchange resin as a raw material, and enabling (NH4)2Ce(NO3)6, HNO3 and NaNO3 water solutions with different proportions to serve as reagents to prepare the nanocomposite material through reaction. In the nanocomposite material, the carrier content of Ce is 50-200mg / g. The novel difunctional resin matrix nanocomposite material has dual functions of catalytic oxidation and adsorption, of which the concrete manifestation is that H2O2 synergistic effect is used for realizing oxidation and synchronous absorption of As (III) in the water body, the removal capacity of micro-As (III) in the water body is improved by a large margin, compared with the same traditional type of As (III)-removing technology, the proportion is generally improved by more than 20 times, the arsenic in the water body can be effectively removed, and the water body environment quality is improved.

Description

technical field [0001] The invention belongs to the field of drinking water and industrial wastewater treatment and environmental functional materials, and more specifically relates to a preparation method of a novel bifunctional resin-based nanocomposite material, a composite material and a method for deeply removing As(III) from water. Background technique [0002] Arsenic is widely distributed in soil and rock minerals in the form of inorganic compounds. The most common arsenic-containing minerals include arsenopyrite (FeAsS), realgar (AsS) and orpiment (As 2 S 3 ). These arsenic-containing minerals are affected by natural evolution and artificial mineral mining, and gradually transform from non-dissociated state to free state and exist in large quantities in groundwater, causing arsenic pollution in groundwater. According to reports, about 140 million people in the world have the problem of drinking arsenic-contaminated groundwater. Countries affected by high-arsenic g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J41/13C02F1/72C02F1/42C02F9/04
CPCC02F1/42C02F1/722C02F1/725C02F9/00B01J31/26C02F2001/422C02F1/66C02F1/001B01J35/393B01J35/50
Inventor 花铭董浩潘丙才单超
Owner NANJING UNIV
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