Method for high-depth purification of heavy metals in water by utilizing titanium phosphate nano flower material

A technology of coating materials and nanoflowers, applied in chemical instruments and methods, coatings, cation exchange materials, etc., can solve the problems of mass transfer and utilization, and achieve the effect of high selectivity and large adsorption capacity

Active Publication Date: 2018-04-10
YANSHAN UNIV
8 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for high-depth purification of heavy metals in water with titanium phosphate nanoflower coating materials that...
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Abstract

Provided is a preparation method of a titanium phosphate nano flower material. Principally, butyl titanate is used as a precursor and is dissolved in organic alcohol, meanwhile strong-acid cation-exchange resin is added, reaction is performed for 5-12 hours at the temperature of 40-60 DEG C, then a phosphoric acid solution is added, reaction is performed for 5-20 hours, three-dimensional lamellartitanium phosphate nano flowers are formed on the outer surface of the resin, and the mass fraction of the nano titanium phosphate carrying capacity is 5.8-26.3%. A method for removing trace heavy metal ions in water by using the titanium phosphate nano flower material is mainly that the temperature of heavy metal polluted water is controlled to be 5-55 DEG C, the concentration is 0.1-50 mg/L, pHis 3-7, the water flows down to pass through a fixed bed post adsorption device filled with a composite material at the flow velocity of 10-50 BV/h, and the heavy metal polluted water is efficiently purified and reached the hygienic standard for drinking water. The problems of mass transfer and utilization rate caused by nano particle blockage can be solved, and deep purification and safety control of water bodies containing heavy metals are achieved.

Application Domain

Cation exchanger materialsWater contaminants +3

Technology Topic

IonStrong acids +14

Image

  • Method for high-depth purification of heavy metals in water by utilizing titanium phosphate nano flower material
  • Method for high-depth purification of heavy metals in water by utilizing titanium phosphate nano flower material

Examples

  • Experimental program(7)

Example Embodiment

[0019] Example 1
[0020] Measure 1.2 mL of butyl titanate and dissolve 50 mL of ethanol, prepare a 3% butyl titanate-ethanol solution, add 10g of D001 type cation exchange resin (produced by Hangzhou Zhengguang Industrial Co., Ltd.) into the butyl titanate-ethanol solution , At 40° C., fully stirred and reacted for 5 hours, and then added 100 mL of phosphoric acid solution with a mass concentration of 70%, reacted for 5 hours to form a titanium phosphate nano-flower coating material with a nano titanium phosphate loading of 5.8%.
[0021] Such as figure 1 As shown, compared to its parent D001 (such as figure 2 Shown), the resin surface is coated with abundant nano-titanium phosphate flower-like coating, which fully proves the success of the preparation.
[0022] Put 15mL of the above-mentioned composite material in a glass adsorption column (ф12×220mm) to remove heavy metal water (Pb=0.1mg/L and Ca(II)=200mg/L, Mg(II)=300mg/L, Na(I) =260mg/L, pH=3) From top to bottom, flow through the adsorption column equipped with resin-based composite material, the temperature is controlled at 5℃, the flow rate is 10BV/h, the effluent Pb(II) ion concentration is at Below 1ppb, the processing capacity is as high as 8000BV. (BV stands for the volume of adsorbent packing layer, the same below)

Example Embodiment

[0023] Example 2
[0024] Measure 36 mL of butyl titanate and dissolve 150 mL of ethanol to prepare a 30% butyl titanate-ethanol solution. Add 20g of 001x7 type cation exchange resin (produced by Hangzhou Zhengguang Industrial Co., Ltd.) into the butyl titanate-ethanol solution. After fully stirring and reacting at 60° C. for 12 hours, 200 mL of phosphoric acid solution with a mass concentration of 85% was added, and reacted for 20 hours to form a titanium phosphate nano-flower coating material with a nano-titanium phosphate loading of 26.3%.
[0025] Put 20mL of the above-mentioned composite material in a glass adsorption column (ф12×220mm) to make water containing heavy metals (Hg=200mg/L and Ca(II)=300mg/L, Mg(II)=120mg/L, Na(I)= 230mg/L, pH=7) Flow through the adsorption column containing resin-based composite material from top to bottom, the temperature is controlled at 55℃, the flow rate is 50BV/h, the Hg(II) ion concentration of the effluent is 10ppb after the adsorbent treatment Below, the processing capacity is as high as 3000BV.

Example Embodiment

[0026] Example 3
[0027] Measure 13.6 mL of butyl titanate and dissolve 170 mL of ethanol, prepare a 10% butyl titanate-ethanol solution, add 10g of D113 type cation exchange resin (produced by Hangzhou Zhengguang Industrial Co., Ltd.) into the butyl titanate-ethanol solution At 50° C., the reaction was fully stirred for 8 hours, and then 200 mL of phosphoric acid solution with a mass concentration of 75% was added and reacted for 10 hours to form a titanium phosphate nano-flower coating material with a nano titanium phosphate loading of 12.1%.
[0028] Put 30mL of the above-mentioned composite material in a glass adsorption column (ф12×220mm) to make water containing heavy metals (Cd=1mg/L and Ca(II)=400mg/L, Mg(II)=100mg/L, Na(I)= 360mg/L, pH=4.5) Flow through the adsorption column containing resin-based composite material from top to bottom, the temperature is controlled at 25℃, the flow rate is 20BV/h, the effluent Pb(II) ion concentration is 2ppb after the adsorbent treatment Below, the processing capacity is as high as 12000BV.
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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

  • Large adsorption capacity
  • High selectivity
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