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Preparation of zeolite-loaded nano-balloon caco3 composite material and method for removing nitrogen and phosphorus from water

A composite adsorption material, zeolite technology, applied in chemical instruments and methods, alkali metal compounds, water/sewage treatment and other directions, can solve the problem of ammonia nitrogen removal efficiency and other problems, achieve slowing and inhibiting water eutrophication, wide source, investment less effect

Active Publication Date: 2018-12-21
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Studies have shown that calcium carbonate (CaCO 3 ) is a good phosphorus removal material, but it has almost no removal efficiency for ammonia nitrogen

Method used

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  • Preparation of zeolite-loaded nano-balloon caco3 composite material and method for removing nitrogen and phosphorus from water
  • Preparation of zeolite-loaded nano-balloon caco3 composite material and method for removing nitrogen and phosphorus from water
  • Preparation of zeolite-loaded nano-balloon caco3 composite material and method for removing nitrogen and phosphorus from water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] At room temperature (25°C), add 5 g / L of adsorbent material to a mixed solution of 5 mM phosphorus and 1 mM nitrogen, then place it on a rotary mixer for 15 hours, centrifuge to take the supernatant, and use a UV spectrophotometer to analyze the water sample The concentration of P in.

[0046] image 3 Shown is that at pH = 9.5, nano-balloon-type CaCO 3 The adsorption capacity of nitrogen and phosphorus by the zeolite composite material increases with the increase of phosphorus concentration in the solution, and it can be seen intuitively from the data graph that the removal performance of this material for phosphorus is quite excellent in the case of concentration (<5.0mM) , can reach a removal rate of more than 90%; the material's removal performance for ammonia nitrogen (<1.0mM) is also quite good, and can reach a removal rate of more than 60%.

Embodiment 2

[0048] At room temperature (25°C), add 5 g / L of nano-balloon graupel-type CaCO to a mixed solution of 5.0 mM phosphorus and 1.0 mM nitrogen 3 / Zeolite composite material, respectively adjust the pH in the range of 5-10.5, put it on the shaker for 15 hours, then centrifuge to take the supernatant to measure the equilibrium pH, measure and calculate the concentration of nitrogen and phosphorus with a UV-visible spectrophotometer, and draw different water bodies Bategrain CaCO at pH 3 Efficiency curves for the simultaneous removal of nitrogen and phosphorus for the zeolite / zeolite composite. In addition, the same amount of natural calcite material and the same amount of natural zeolite were weighed, and the simultaneous removal of nitrogen and phosphorus adsorption experiment was carried out, and the specific operation steps were the same as above.

[0049] Figure 4 As shown, the synthesized nano-balloon-type CaCO 3 The curve graph of the pH effect on the nitrogen and phospho...

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Abstract

The invention discloses an adsorption material-nano vaterite type CaCO3 / composite material synthesized by using zeolite loaded CaCO3 nanospheres in low cost and simultaneously used for removing nitrogen and phosphorus in water bodies; a method comprises the specific synthetic steps: step 1) adding a certain amount of a calcium acetate (Ca(CH3COO)2) aqueous solution into ethylene glycol to prepare a solution A; step 2) adding a certain amount of a Na2CO3 aqueous solution into ethylene glycol to prepare a solution B; and step 3) carrying out ultrasonic treatment of a certain amount of zeolite, then adding into the solution A, stirring and mixing evenly, rapidly carrying out a mixed reaction of the solution A and the solution B under a condition of water bath of 75 DEG C, 1 h later, to obtain a product, repeatedly rinsing the product with anhydrous ethanol (AR), taking out the product, and drying under a condition of the temperature of 40-60 DEG C. The designed and synthesized material is the nano vaterite type CaCO3 / zeolite composite material, can simultaneously effectively remove phosphorus and ammonium nitrogen pollution in wastewater, lays the foundation for water body eutrophication treatment and resource reuse, and has good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of preparation of simple inorganic composite materials and treatment of eutrophic water bodies, in particular to a zeolite-loaded vaterite-type calcium carbonate (CaCO 3 ) The preparation method of the material. Background technique [0002] With the advancement of industrialization, the problem of environmental pollution is becoming more and more serious, and water eutrophication is one of the main forms. Nitrogen and phosphorus, as the main cause of water eutrophication, have attracted extensive attention of researchers at home and abroad. At present, the hot spot of its research is to use various technical means to effectively remove nitrogen and phosphorus in water bodies. [0003] According to the survey, when the concentration of phosphorus in water exceeds 0.02ppm, and the concentration of ammonia nitrogen exceeds 0.3ppm, eutrophication will occur. Its pollution sources are mainly industrial phospho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 徐楠谭锦周凯荣陈明刘诚徐小婷李亚楠
Owner SUZHOU UNIV OF SCI & TECH
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