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Preparation method of modified volcanic slag filter material and its application

A technology of volcanic slag and modification, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the complex process of treating phenol wastewater, difficult operation of filter material modification, and high cost of adsorbents and other problems, to achieve the effect of low metal leaching toxicity, expensive solution cost, and water treatment cost saving

Inactive Publication Date: 2019-12-10
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost of the existing adsorbent, difficult operation of filter material modification, and complicated process of treating phenol wastewater, and provides a preparation method and application of modified volcanic slag filter material

Method used

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  • Preparation method of modified volcanic slag filter material and its application
  • Preparation method of modified volcanic slag filter material and its application
  • Preparation method of modified volcanic slag filter material and its application

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Experimental program
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Embodiment 1

[0037] First, sieve the volcanic slag through sieves with apertures of 1.5 mm and 1.0 mm respectively, rinse it repeatedly with tap water, and dry it in an oven at 110°C. After drying, take out the volcanic slag at 0.1mol L -1 Pretreated in dilute hydrochloric acid solution, soaked for 24 hours, washed with distilled water until neutral, dried in an oven at 110°C, taken out and cooled to complete pretreatment; then soaked 50g of pretreated volcanic slag in 80mL 2.5mol L -1 FeCl 3 After soaking in the solution for 20 minutes, place the volcanic slag in an oven at 110°C for drying, and finally place the volcanic slag in a muffle furnace at 400°C for 4 hours, then take it out and cool it at room temperature. The above steps are repeated several times until the surface of the modified volcanic slag is no longer wet, and the preparation of the modified volcanic slag filter material is completed.

[0038] figure 1 Scanning electron micrograph of the modified volcanic slag filter...

Embodiment 2

[0040] The modified volcanic slag filter material that prepares with embodiment 1 is adsorbent, gets 100ml30mg L -1 The simulated phenol wastewater was placed in six 250mL Erlenmeyer flasks, and the pH value was adjusted to 7, and 2.0g, 2.5g, 3.0g, 3.5g, 4.0g, 4.5g of iron-coated modified volcanic slag were added in different amounts. Oscillate with an oscillator at a constant speed for 2.5 hours at 30°C, take it out, let it stand for 10 minutes, and filter it. Take the filtered solution and measure its absorbance by a TU-1901 double-beam ultraviolet-visible spectrophotometer.

[0041] figure 2 For the influence figure of the consumption of the modified volcanic slag filter material that embodiment 1 prepares to the phenol simulated wastewater adsorption treatment effect; figure 2 As shown, when the amount of iron-coated modified volcanic slag filter material is 2.0g, the removal rate and adsorption capacity of phenol are high, so the optimal amount of adsorbent should be 2.0...

Embodiment 3

[0043] The modified volcanic slag filter material that prepares with embodiment 1 is adsorbent, gets 100ml30mg L -1 The simulated phenol wastewater was placed in six 250mL conical flasks, the pH value was adjusted to 7, and then 2.0g of iron-coated modified volcanic slag was added, and shaken at a constant speed for 1.0h, 1.5h, and 2.0h with an oscillator at 30°C. , 2.5h, 3.0h, and 3.5h, take it out, let it stand for 10min, and then filter. Take the filtered solution and measure its absorbance by a TU-1901 double-beam ultraviolet-visible spectrophotometer.

[0044] image 3 For the modified volcanic slag filter material adsorption phenol simulated waste water time that embodiment 1 prepares influence figure on adsorption treatment effect; image 3 As shown, with the extension of the adsorption time, the removal rate and adsorption capacity of the adsorbent to phenol gradually increased at first, and showed a downward trend after 3.0 h. When the adsorption time was 3.0h, the ...

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Abstract

The invention discloses a preparation method of a modified volcanic slag filter material and its application, belonging to the technical field of water treatment. The preparation method comprises thefollowing steps of: screening and pretreating volcanic slag, taking ferric chloride as a modifier, soaking the pretreated volcanic slag in a modification solution, drying after a certain time, calcining in a muffle furnace, and completing modification through multiple operations. The modified volcanic slag filter material prepared by the invention has larger specific surface area and developed pore structure, the method of the invention does not generate secondary pollution problems, and the volcanic slag is cheap and easy to obtain, the modification method and the adsorption process are simple to operate, the treatment effect is good, the treatment cost is greatly saved, and the method can be widely applied to the field of water treatment industry.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method and application of a modified volcanic slag filter material. Background technique [0002] Phenol wastewater mainly refers to highly toxic organic pollutant wastewater produced in petrochemical and pharmaceutical industries. Long-term exposure to phenol wastewater can cause respiratory tract irritation, liver damage, irregular heartbeat, and nervous system disorders, so it is urgent to seek effective harmless treatment methods (Diana P.Vargas, Liliana Giraldo, Juan Carlos Moreno-Pirajan. Effect of Textural and Chemical Characteristics of Activated Carbons on Phenol Adsorption in Aqueous Solutions [J]. Polish Journal of Chemical Technology, 2017, 19(4): 87-93.). [0003] At present, adsorption method is widely used in wastewater treatment. It is to use the porosity of solid adsorbent to adsorb harmful substances in wastewater to the pores (Xu Yaqun, S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28C02F101/34
CPCB01J20/02C02F1/281C02F2101/345
Inventor 胡明忠邓文慧
Owner CHANGCHUN UNIV OF TECH
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