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Arsenic removing water purification treatment method

A treatment method and arsenic water purification technology, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. good effect

Inactive Publication Date: 2015-10-07
毛允明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of arsenic removal and water purification treatment methods in the prior art is high and the removal rate still needs to be improved.

Method used

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  • Arsenic removing water purification treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 Shown, a kind of arsenic removal water purification treatment method comprises steps:

[0034] 1) Put the raw water to be treated into the raw water pipeline, and add potassium permanganate into the pipeline mixer installed on the raw water pipeline according to the trivalent arsenic content, and mix evenly;

[0035] 2) Add polymeric ferric sulfate flocculant to the pipeline mixer and mix evenly; among them, the dosage of polymeric ferric sulfate flocculant is 10 mg / L;

[0036] 3) After mixing, transport it to the flocculation tank for full reaction to form alum flowers; add polyacrylamide coagulant aid to the flocculation tank, as the reaction progresses, the alum flowers become larger and larger, after 40 minutes of flocculation reaction, Large alum flowers are formed in the flocculation tank; among them, the dosage of coagulant aid is 1.5 mg / L;

[0037] 4) Step 3) After fully reacting, the water and alum flowers in the flocculation tank are evenly ...

Embodiment 2

[0043] Such as figure 1 Shown, a kind of arsenic removal water purification treatment method comprises steps:

[0044] 1) Put the raw water to be treated into the raw water pipeline, and add potassium permanganate into the pipeline mixer installed on the raw water pipeline according to the trivalent arsenic content, and mix evenly;

[0045] 2) Add polymeric ferric sulfate flocculant to the pipeline mixer and mix evenly; among them, the dosage of polymeric ferric sulfate flocculant is 12 mg / L;

[0046] 3) After mixing, transport it to the flocculation tank for full reaction to form alum flowers; add polyacrylamide coagulant aid to the flocculation tank, as the reaction progresses, the alum flowers become larger and larger, after 40 minutes of flocculation reaction, Large alum flowers are formed in the flocculation tank; among them, the dosage of coagulant aid is 2 mg / L;

[0047] 4) Step 3) After fully reacting, the water and alum flowers in the flocculation tank are evenly di...

Embodiment 3

[0053] Such as figure 1 Shown, a kind of arsenic removal water purification treatment method comprises steps:

[0054] 1) Put the raw water to be treated into the raw water pipeline, and add potassium permanganate into the pipeline mixer installed on the raw water pipeline according to the trivalent arsenic content, and mix evenly;

[0055] 2) Add polymeric ferric sulfate flocculant to the pipeline mixer and mix evenly; among them, the dosage of polymeric ferric sulfate flocculant is 8 mg / L;

[0056] 3) After mixing, it is transported to the flocculation tank for full reaction to form alum flowers; adding polyacrylamide coagulant aid to the flocculation tank, as the reaction progresses, the alum flowers become larger and larger. After 35 minutes of flocculation reaction, Large alum flowers are formed in the flocculation tank; among them, the dosage of coagulant aid is 1.0 mg / L;

[0057] 4) Step 3) After fully reacting, the water and alum flowers in the flocculation tank are ...

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Abstract

The invention discloses an arsenic removing water purification treatment method and belongs to the technical field of water purification treatment. Arsenic in water exists in two main valence states including tervalence (arsenite ions) and pentavalence (arsenate ions), wherein the pentavalent arsenic can be removed by an iron salt flocculating agent, but the tervalent arsenic cannot be removed by the iron salt flocculating agent. According to the process, potassium hypermanganate is used for pre-oxidizing, and the iron salt flocculating agent and an auxiliary flocculating agent are added together; the arsenic in raw water is removed by a coagulant sedimentation method; finally, tiny floc, which is not settled and is adsorbed by the flocculating agents, is further intercepted by quartz sand filtering or an immersing type ultrafiltration membrane, so that the content of the arsenic in the output water reaches 0.1 microgram per liter.

Description

technical field [0001] The invention relates to the technical field of water purification treatment, in particular to a water purification treatment method for removing arsenic from low-temperature and low-turbidity raw water. Background technique [0002] Arsenic pollution is mainly divided into two types: natural sources and artificial sources; natural sources refer to the weathering of arsenic-containing rocks and soils, leaching of arsenic-containing ores, geological changes, and dissolution of underground rock minerals into natural water bodies; artificial sources Refers to the use of arsenic-containing pesticides, the mining and smelting of arsenic compounds, the pollution of natural water bodies by industrial wastewater such as tanning, textiles, wood processing, glass, paint pigments, and ceramics. The above-mentioned sources of arsenic pollution have seriously polluted groundwater and surface drinking water sources. , leading to serious excessive arsenic content in dr...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/10
Inventor 王邦强栾好峰张宁东黄振王玲玲
Owner 毛允明
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