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Method of removing arsenic in salt lake water

A lake water and raw water technology, applied in the field of water pollutant treatment, can solve problems such as unsatisfactory and unreachable maximum allowable content standards, and achieve the effects of low cost, easy raw material procurement, and simple process

Inactive Publication Date: 2018-11-09
陆晓平
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned arsenic removal method maintains a high arsenic removal rate, it still cannot meet the maximum allowable content standard for saltwater lake water, let alone the arsenic content in drinking water stipulated by the recent Ministry of Construction industry standard of 10ug / L standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0041] Put three parts of 100ml water to be treated into three 300ml flasks respectively, and number them as 1#, 2#, 3#. Add 0.0015g of ferric chloride respectively, pass through ozone according to the speed of 6-10mg / L, and pass through the ozone time according to the order of numbers for 15 minutes, 30 minutes and 45 minutes.

[0042] After standing for 30 minutes, filter, and filter the filtered solution through three stages of resin columns equipped with pretreated ion exchange resins. The amount of resin added to each resin column is 600g. During the ion exchange process, the control solution passes through the ion exchange resin. The flow rate of the column was 10 ml / min and treated water was obtained.

[0043] The arsenic content in the raw water was determined to be 2.6mg / L by atomic fluorescence spectrometry.

[0044] The content of arsenic in the treated water measured by atomic fluorescence spectrometry was 8ug / L, 9ug / L, and 10ug / L.

[0045] From the above test resu...

specific Embodiment 2

[0046] Take three portions of 100ml raw water and add them to three 300ml beakers, numbered 4#, 5#, 6#. 0.0015 g of ferric chloride was added respectively. Stir for 30 minutes, let stand for 30 minutes, and filter. The filtrate is respectively passed through the resin column for ion exchange, wherein the ion exchange resin is pretreated before use to improve its activity, and the flow rate is controlled at 10 ml / min during the ion exchange process. The test results were 90ug / L, 87ug / L, and 93ug / L respectively.

[0047] Through the above comparison test and test result analysis, the experimental effect of the stock solution without ozone aeration did not achieve the expected purpose, combined with ozone aeration, ferric chloride precipitation, and the comprehensive application of resin ion exchange method achieved the goal of reducing the content of arsenic in water Purpose.

[0048] By adopting the above-mentioned technical scheme disclosed in the present invention, the fol...

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Abstract

The invention discloses a method of removing arsenic in salt lake water, which relates to the technical field of water pollutant treatment. By the method of removing arsenic in salt lake water, ferriciron and ozone are added into salt lake water with arsenic content of 2-2.6 mg / L firstly, when the trivalent arsenic in the water to be processed is oxidized to be pentavalent arsenic the pentavalentarsenic coprecipitates with ferric hydroxide colloid generated by ferric iron hydrolysis, hydrated titanium dioxide ion exchange resin with high activity treated by activation is adopted to carry outtertiary ion exchange, the arsenic content in the processed water is enabled to be 0 mg / L-0.01 mg / L, which can meet the specified standard that the arsenic content in drinking water is 10 mu g / L or below, the problem that the arsenic content in water cannot achieve the specified standard of being 10 mu g / L or below in the prior art is solved, furthermore, the method of removing arsenic in the salt lake water is simpler in operating process, available in raw material purchase and low in cost. The process is simple, which is applicable to treatment for reducing arsenic content in water in largebatches.

Description

technical field [0001] The invention relates to the technical field of water pollutant treatment, in particular to a method for removing arsenic in saltwater lake water. Background technique [0002] Arsenic is a toxic element. Both natural groundwater and surface water may contain arsenic. In addition to originating from the earth's crust, arsenic pollution also comes from pesticide factories, glass factories and mine drainage. The content of arsenic in groundwater is higher than that in surface water. Arsenic can enter the human body through the respiratory tract, food or skin contact, accumulate in organs or tissues such as liver, kidney, bones, and hair, and damage the digestive system and nervous system, thereby causing cancer. There are two types of arsenic compounds: trivalent and pentavalent. Generally, pentavalent arsenic ions are more stable to be adsorbed. Therefore, arsenic in water mainly exists in the form of trivalent arsenic ions, and trivalent arsenic is mor...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/10
CPCC02F1/001C02F1/42C02F1/78C02F9/00C02F2001/007C02F2101/103C02F2301/08
Inventor 陆晓平
Owner 陆晓平
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