Treatment method for manganese-containing raw water

A treatment method and raw water technology, applied in the field of water treatment, can solve problems such as limited effect, and achieve the effects of short reaction time, easy solid-liquid separation, and wide application range

Inactive Publication Date: 2019-06-14
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is used in all stages of water treatment, but it is mainly used as an adsorbent, and its effect on manganese removal alone is very limited

Method used

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  • Treatment method for manganese-containing raw water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, it shows a schematic flow chart of the method for treating manganese-containing raw water of the present invention. Take 1L of 5°C aqueous solution containing 0.2mg / L Mn, add 20mg / L coconut shell powder activated carbon and 2.0mg / L sodium hypochlorite (calculated as available chlorine) to it at the same time, mechanically stir and mix evenly, adjust the pH to 5.5, and react 10 Minutes later, the membrane was passed through, and the residual manganese concentration in the filtered solution was measured by inductively coupled plasma mass spectrometry (ICP-MS).

[0036] The measurement results are shown in Table 1.

Embodiment 2

[0038] Such as figure 1 As shown, it shows a schematic flow chart of the method for treating manganese-containing raw water of the present invention. Take 1L of 35°C aqueous solution containing 0.05mg / L Mn, add 3mg / L coal-based powdered activated carbon and 0.5mg / L liquid chlorine (calculated as available chlorine) to it at the same time, mechanically stir and mix evenly, adjust the pH to 9.0, and react After 1 hour, pass through the membrane, and use inductively coupled plasma mass spectrometry (ICP-MS) to measure the concentration of manganese remaining in the filtered solution.

[0039] The measurement results are shown in Table 1.

Embodiment 3

[0041] Such as figure 1 As shown, it shows a schematic flow chart of the method for treating manganese-containing raw water of the present invention. Take 1L of 30°C aqueous solution containing 5mg / LMn, add 100mg / L wood powder activated carbon and 15mg / L sodium hypochlorite to it at the same time, stir and mix evenly, adjust the pH to 8.0, react for 1 hour, centrifuge, and use inductively coupled plasma Mass spectrometry (ICP-MS) measures the residual manganese concentration in the supernatant.

[0042] The measurement results are shown in Table 1.

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Abstract

The invention relates to a treatment method for manganese-containing raw water. The treatment method comprises the following steps: adding chlorine and activated carbon into manganese-containing raw water, performing adsorption oxidation reaction and then performing solid-liquid separation. The manganese-removing condition according to the invention is wide in range of application; manganese ionscan be more easily removed under a high pH condition; the manganese-removing method provided by the invention is also applicable to weakly acidic water (pH=6-7); application range is wide (pH=5.5-9.0); indexes, such as pH, of water almost need not be adjusted; the method is suitable for manganese removal under various water conditions.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a treatment method for manganese-containing raw water. Background technique [0002] Manganese widely exists in various natural water bodies, such as rivers, lakes and reservoirs. The concentration range of manganese in natural water is very wide, ranging from tens of micrograms to thousands of micrograms per liter. In water treatment, manganese-containing raw water enters the water plant, and conventional processes usually cannot effectively remove manganese, especially the reduced divalent manganese ions. The residual manganese in the factory water will continue to transform and deposit on the pipe wall after entering the pipe network. When the hydraulic conditions change, it will cause yellow water and black water in the pipe network. In wastewater treatment, wastewater containing manganese metal is also very common. [0003] At present, the removal meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/28C02F1/76C02F101/20
Inventor 石宝友李贵伟郝昊天
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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