Water treatment method for instant synthesis of laminated bis-hydroxide

A technology of double hydroxide and hydroxide, applied in the field of water treatment, to achieve the effect of wide concentration range and simple process flow

Inactive Publication Date: 2005-01-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, although LDH has been synthesized on an industrial scale (Alco Company of the United States), there are still technical and economic problems in the application of LDH as a water treatment adsorbent.

Method used

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  • Water treatment method for instant synthesis of laminated bis-hydroxide
  • Water treatment method for instant synthesis of laminated bis-hydroxide
  • Water treatment method for instant synthesis of laminated bis-hydroxide

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Embodiment Construction

[0013] The water suitable for processing in this embodiment includes: containing anions, such as CrO 4 2- , SeO 4 2- , AsO 4 2- 、PO 4 3- , SO 4 2- , F - Such as industrial wastewater or drinking water, the substances suitable for purification and removal include: pollutants in wastewater existing in the form of anions or substances harmful to human body in drinking water. The specific processing steps are:

[0014] a. The water that needs to be purified first enters the dosing reaction tank, and magnesium and aluminum compounds are added to meet the chemical components required for the synthesis of LDH, and they are mixed evenly. The aluminum compound to be added is any kind of soluble aluminum salt or aluminum compound, or their mixture. Including aluminum-containing chlorides, nitrates, sulfates, metaaluminates, etc. Aluminum compounds that can be used as additives include aluminum-containing solid salts and aluminum-containing solutions. The magnesium compound ...

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Abstract

The invention discloses a method and device for purifying tap water to drinking water, wherein the method comprises carrying out magnetic treatment to the tap water, then proceeding photo-catalytic purification treatment to the magnetized tap water by utilizing a filtration reaction bed, finally fulfilling higher level purification on the final filter layer through applying ultraviolet light catalyst and photocatalyst, thus meeting the quality standard of drinkable water.

Description

Technical field: [0001] The invention belongs to water treatment technology. Background technique: [0002] Layered double hydroxide (LDH for short) is also called talcite-like, hydrotalcite-like (HT for short) or anion clays. Its basic structural formula is: M x 2+ m y 3+ (OH) 2x+3y-nz (A n- ) z mH 2 O, M 2+ and M 3+ represent divalent and trivalent cations, respectively, A n- Represents n-valent anions. LDH has a layered structure similar to brucite. In the structural unit layer of brucite, divalent cations are partially replaced by trivalent cations to generate structural positive charges, so it is necessary to introduce anions into the structural unit layers to balance the structural positive charges. Similar to general clay minerals, the anions between the structural layers and the structural positive charges belong to the remote electrostatic balance, and the force is weak, and the anions in it can be exchanged by other anions, so LDH has excellent anion ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 陈天虎彭书传
Owner HEFEI UNIV OF TECH
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