Microwave-assisted natural volcanic scoria-sodium alginate composite microsphere water purification material

A technology of sodium alginate and composite microspheres, applied in the field of environmental engineering, can solve the problems of poor adsorption efficiency, easy to break, high water content, etc., and achieve the effect of fast and simple preparation process, stable structure and performance, and easy large-scale production

Inactive Publication Date: 2011-11-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, it is worth pointing out that the initial formation of natural volcanic slag-sodium alginate composite microspheres has a large water content, is easy to break, an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Natural volcanic slag pretreatment process:

[0021] Weigh 0.5 kg of natural volcanic slag, place it in deionized water, shake and wash it thoroughly, drain it, and dry it in an electric drying oven at 100°C for 5 hours, then mechanically crush it, and pass it through a 200-mesh sieve for later use.

[0022] (2) Prepare 1.5% sodium alginate solution (mass percentage):

[0023] Add 500mL of deionized water into the glass beaker in advance, then place it on an electric stirrer, quickly pour 7.5g of sodium alginate solid weighed under the condition of heating at 50°C, and stir fully at a speed of 500r / min until the solution is clear Transparent, then use 100% power to sonicate for 3 minutes to remove air bubbles that may exist in the solution.

[0024] (3) Preparation of 0.05mol / L calcium chloride solution:

[0025] Accurately weigh 5.549g of anhydrous calcium chloride solid into a 100mL glass beaker, add an appropriate amount of secondary deionized water to fully di...

Embodiment 2

[0036](1) Natural volcanic slag pretreatment process:

[0037] Weigh 0.5 kg of natural volcanic slag, place it in deionized water, shake and wash it thoroughly, drain it, and dry it in an electric drying oven at 100°C for 5 hours, then mechanically crush it, and pass it through a 200-mesh sieve for later use.

[0038] (2) Prepare 1.5% sodium alginate solution (mass percentage):

[0039] Add 500mL of deionized water into the glass beaker in advance, then place it on an electric stirrer, quickly pour 7.5g of sodium alginate solid weighed under the condition of heating at 50°C, and stir fully at a speed of 500r / min until the solution is clear Transparent, then use 100% power to sonicate for 3 minutes to remove air bubbles that may exist in the solution.

[0040] (3) Preparation of 0.2mol / L calcium chloride solution:

[0041] Accurately weigh 22.198g of anhydrous calcium chloride solid into a 500mL glass beaker, add an appropriate amount of secondary deionized water to fully dis...

Embodiment 3

[0052] (1) Natural volcanic slag pretreatment process:

[0053] Weigh 0.5 kg of natural volcanic slag, place it in deionized water, shake and wash it thoroughly, drain it, and dry it in an electric drying oven at 100°C for 5 hours, then mechanically crush it, and pass it through a 200-mesh sieve for later use.

[0054] (2) Prepare 1.5% sodium alginate solution (mass percentage):

[0055] Add 500mL of deionized water into the glass beaker in advance, then place it on an electric stirrer, quickly pour 7.5g of sodium alginate solid weighed under the condition of heating at 50°C, and stir fully at a speed of 500r / min until the solution is clear Transparent, then use 100% power to sonicate for 3 minutes to remove air bubbles that may exist in the solution.

[0056] (3) Preparation of 1.0mol / L calcium chloride solution:

[0057] Accurately weigh 110.99g of anhydrous calcium chloride solid into a 500mL glass beaker, add an appropriate amount of secondary deionized water to fully di...

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Abstract

A microwave-assisted natural volcanic scoria-sodium alginate composite microsphere water purification material belongs to the technical field of environmental engineering, and is prepared by adding natural volcanic scoriae into a sodium alginate solution, stirring, adding a CaCl2 solution, performing a crosslinking reaction to obtain a volcanic scoria-sodium alginate composite microsphere, and finally performing microwave processing in a microwave reaction chamber. The prepared purification material of the invention can be used as an adsorbent for water purification.

Description

technical field [0001] The invention relates to a material in the technical field of environmental engineering and its preparation and application method, in particular to a microwave-assisted natural volcanic slag-sodium alginate composite microsphere water purification material. Background technique [0002] There are abundant natural volcanic slag resources in Jilin Province of my country. Calcium oxide, iron oxide, aluminum oxide, titanium oxide and other components in its chemical structure can be used as active sites, and anions such as phosphate and arsenate that may exist in the water body The groups directly form chelation to remove typical pollutants in water by specific adsorption. However, based on the direct adsorption of natural volcanic slag to remove water pollutants, solid-liquid separation is difficult, and the phenomenon of "muddy water" mixing will occur. Sodium alginate (C 6 h 7 o 8 Na)n is a natural polysaccharide carbohydrate with low price. Using c...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/28C02F1/28
Inventor 徐芳陈微微李龙海苏彦文黄晓博张闻中
Owner SHANGHAI JIAO TONG UNIV
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