Nano-compound adsorbent for efficiently removing trace phosphorus, arsenic and antimony from water body

A nano-composite and adsorbent technology, which is applied in the direction of adsorption of water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of low adsorption capacity and adsorption selectivity, weak adsorption reactivity, and obvious swelling. Achieve the effects of strong reactivity, rich nanopore structure and large adsorption capacity

Active Publication Date: 2010-08-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of the existing nanocomposite adsorbents such as obvious swelling, weak adsorption reaction activity, low adsorption capacity and adsorption selectivity, the present invention provides a nanocomposite adsorbent that can efficiently remove trace amounts of phosphorus, arsenic and antimony in water bodies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Let 2.5L of the mixed solution containing 0.3M FeCl3, 2M HCl, 1M NaCl and 150ml of the mixed solution containing 12g NaOH, 6g NaCl pass slowly through 50ml (about 40 grams) of ultra-high cross-linked polystyrene-divinylbenzene resin (cross-linked Link degree is 25%, the total volume of 1-20nm nanopores (i.e., pore volume) accounts for 95% of the total volume of all pores in the organic framework, and the surface functional groups are mainly quaternary ammonium groups), heat treatment after centrifugal dehydration to obtain the immobilization capacity of hydrated iron oxide (calculated as Fe) is 10% nanocomposite adsorbent by weight (wherein the ratio of hydrated iron oxide diameter range 0.5~18nm is higher than 99%, and its average diameter is 4nm), it is packed into the glass adsorption column with jacket In the medium (Φ32×360mm), the simulated Sb(III) slightly polluted water body (the pH of the water body is about 5, the concentration of antimony is 1ppm, and the back...

Embodiment 2

[0030]Let 2.5L of the mixed solution containing 0.3M FeCl3, 2M HCl, 1M NaCl and 150ml of the mixed solution containing 12g NaOH, 6g NaCl pass slowly through 50ml (about 40 grams) of ultra-high cross-linked polystyrene-divinylbenzene resin (cross-linked Link degree is 25%, the total volume of 1-20nm nanopores (i.e., pore volume) accounts for 95% of the total volume of all pores in the organic framework, and the surface functional groups are mainly quaternary ammonium groups), heat treatment after centrifugal dehydration to obtain the immobilization capacity of hydrated iron oxide (calculated as Fe) is 10% nanocomposite adsorbent by weight (wherein the ratio of the hydrated iron oxide diameter range of 0.5 to 18nm is higher than 99%, and its average diameter is 4nm), which is packed into a jacketed glass adsorption In the column (Φ32×360mm), the simulated Sb(III) slightly polluted water body (the pH of the water body is about 8, the concentration of antimony is 2ppm, and the back...

Embodiment 3

[0033] Let 2.5L of the mixed solution containing 0.3M FeCl3, 2M HCl, 1M NaCl and 150ml of the mixed solution containing 12g NaOH, 6g NaCl pass slowly through 50ml (about 40 grams) of ultra-high cross-linked polystyrene-divinylbenzene resin (cross-linked Link degree is 25%, the total volume of 1-20nm nanopores (i.e., pore volume) accounts for 95% of the total volume of all pores in the organic framework, and the surface functional groups are mainly quaternary ammonium groups), heat treatment after centrifugal dehydration to obtain the immobilization capacity of hydrated iron oxide (calculated as Fe) is 10% nanocomposite adsorbent by weight (wherein the ratio of hydrated iron oxide diameter range 0.5~18nm is higher than 99%, and its average diameter is 4nm), it is packed into the glass adsorption column with jacket Medium (Φ32×360mm), the simulated Sb(V) micro-polluted water body (the pH of the water body is about 5, the concentration of antimony is 1ppm, and the background ions ...

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Abstract

The invention discloses a nano-compound adsorbent for efficiently removing trace phosphorus, arsenic and antimony from a water body, belonging to the technical field of environment functional materials. The organic framework of the nano-compound adsorbent of the invention is hypercrosslinked styrene-divinylbenzene ion exchange resin, a functional group for surface binding of the organic framework is a quaternary ammonium group or pyridyl, nano-inorganic functional particles are loaded, and the total volume of 1-20nm nano-pores accounts for greater than or equal to 90% of the total volume of all the pores of the organic framework. The nano-inorganic functional particles are nano-hydrated ferric oxide or nano-hydrated manganese oxide. The nano-compound adsorbent of the invention has more obvious nano effect, strong reaction activity, great adsorption capacity and high selectivity, well solves the defects of obvious swelling, weak adsorption reaction activity, small adsorption capacity, lower adsorption selectivity and the like of the existing nano-compound adsorbent, and is more suitable for advanced treatment of micro-pollution of water and waste water.

Description

technical field [0001] The invention relates to a nanocomposite adsorbent, more specifically a nanocomposite adsorbent with extremely high selectivity to phosphorus, arsenic and antimony. Background technique [0002] Arsenic and antimony are typical toxic and harmful elements, which are extremely toxic to organisms including humans, and phosphorus is considered to be one of the key elements leading to eutrophication of water bodies. The content of phosphorus is strictly limited, and there are corresponding regulations on the content of phosphorus. [0003] Adsorption is considered to be one of the most economical and effective methods for treating phosphorus, arsenic, and antimony pollution in water. Studies in the past two decades have shown that hydrated iron oxide and manganese oxide particles have high specific surface area and surface hydroxyl density, have high adsorption selectivity for phosphorus, arsenic, and antimony, and can be regenerated and activated by adjus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C02F1/28C02F1/58
Inventor 潘丙才吕路张孝林张炜铭吴军张全兴
Owner NANJING UNIV
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