Preparation method for compound iron-zinc coagulant

An iron-zinc coagulant and a technology for polymerizing iron, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of lack of competitiveness in effect and cost, and achieve the effect of good coagulation effect, fast speed and less residue.

Inactive Publication Date: 2015-10-28
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of organic polymer flocculants alone is not competitive with inorganic polymer coagul...

Method used

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  • Preparation method for compound iron-zinc coagulant

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Experimental program
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Effect test

Embodiment 1

[0019] 0.2mol / L ferrous sulfate solution, 0.2mol / L aluminum sulfate solution, after mixing according to the volume ratio of 1:5, add an appropriate amount of 0.2mol / L NaOH solution to alkalinize it to pH 2.1; take the above mixed The solution was microwaved for 15 minutes under the condition of feeding oxygen prepared by an oxygen generator, the microwave frequency was 2450MHz, the power was 900W, and aged for 24 hours to make a polymerized iron / aluminum composite colloid, which was in a brownish red stable and transparent state at this time; take 200mL of the above Add 10mL of 0.1mol / L zinc chloride solution to the polymerized iron / aluminum composite colloid after microwave treatment, add 10mL of 0.5% polydimethyldiallylammonium chloride solution, and stir for 30min to form a composite Iron zinc coagulant (PFZA).

Embodiment 2

[0021] 0.3mol / L ferrous chloride solution, 0.3mol / L aluminum chloride solution, after mixing according to the ratio of 1:1 by volume, add an appropriate amount of 0.2mol / L KOH solution to alkalize it to pH 1.8; take The above-mentioned mixed solution was microwaved for 30 minutes under the condition of introducing air depleted of carbon dioxide, microwave frequency 2450MHz, power 900W, and aged for 12 hours to make a polymerized iron / aluminum composite colloid, which was in a brownish red stable and transparent state at this time; take 200mL of the above Add 4mL of 0.1mol / L zinc chloride solution to the polymerized iron / aluminum composite colloid after microwave treatment, add 4mL of 0.5% polydimethyldiallyl ammonium chloride solution, and stir for 30min to prepare into a composite iron-zinc coagulant (PFZA).

Embodiment 3

[0023] 0.1mol / L ferrous chloride solution, 0.1mol / L aluminum chloride solution, after mixing according to the volume ratio of 1:10, add an appropriate amount of 0.2mol / L sodium carbonate solution to alkalinize it to pH 2.3; Take the above-mentioned mixed solution and microwave it for 60 minutes under the condition of introducing the air depleted of carbon dioxide, the microwave frequency is 2450MHz, the power is 900W, and aging for 24 hours to make the polymerized iron / aluminum composite colloid, which is in a brownish red stable and transparent state; take 200mL Add 20mL of 0.1mol / L zinc chloride solution to the above-mentioned polymerized iron / aluminum composite colloid after microwave treatment, add 20mL of 0.5% polydimethyldiallylammonium chloride solution in mass fraction, and stir for 30min, namely Made of composite iron-zinc coagulant (PFZA).

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Abstract

The invention relates to a preparation method for a coagulant used for waste water and surface water treatment, in particular to a preparation method for a compound iron-zinc coagulant. The preparation method for the compound iron-zinc coagulant mainly solves the problems of the high cost, the poor adaptation and the like existing in an existing coagulant. The preparation method for the compound iron-zinc coagulant comprises the following steps that 1, an iron salt solution and an aluminum solution at the volume ratio of 1:1-10 are taken and mixed to be uniform for preparing a mixed solution, and then alkali liquor is used for adjusting the pH of the mixed solution to be 1.8-2.3; 2, oxidizing gas is fed into the mixed solution, then microwave treatment is performed for 10-60 min, seasoning is performed for above 12 hours, and a poly iron/aluminum compound colloid is obtained; 3, a certain amount of the poly iron/aluminum compound colloid is taken, a 2-10% zinc sulfate or zinc chloride solution is added into the taken poly iron/aluminum compound colloid, then a 2-10% poly dimethyl diallyl ammonium chloride solution is added into the obtained solution, and the compound iron-zinc coagulant is obtained. The preparation method for the compound iron-zinc coagulant has the advantages of being simple in technology, low in cost, good in coagulation effect and the like.

Description

technical field [0001] The invention relates to a preparation method of a coagulant used for sewage and surface water treatment, in particular to a preparation method of a composite iron-zinc coagulant. Background technique [0002] The shortage of water resources and water pollution are major problems restricting the coordinated development of social economy and environment at present, and they are also important bottlenecks of regional development. Sewage treatment and reuse is an effective way to solve the shortage of water resources and environmental pollution, and it is of great significance to save fresh water resources, protect the environment, and achieve sustainable development. [0003] The current sewage treatment methods are mainly divided into physical and chemical methods and biological methods. The biological method uses the growth and metabolism process of microbial activated sludge in water to consume pollutants in water, mainly biodegradable organic matter...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
Inventor 刘海龙郭雪峰
Owner SHANXI UNIV
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