Method for treating acid heavy metal polluted waste water

A treatment method and technology for heavy metals, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of final disposal of precipitated sludge, unsatisfactory treatment effect of low-concentration heavy metal wastewater, etc. problem, to achieve the effect of easy operation, low cost and easy access

Inactive Publication Date: 2007-01-10
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial applications, sedimentation is the most commonly used method to treat heavy metal wastewater, but the effluent of the sedimentation method is often difficult to meet the increasingly stringent discharge standards, and it also brings problems in the management and final disposal of sedimentation sludge; The treatment effect of concentrated heavy metal wastewater is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dry the chestnut skin in a constant temperature oven at 60°C for 30 hours, grind it, and sieve it, and take the chestnut skin with a particle size of 15 mesh for use.

[0017] Weigh 4.0g of the above-mentioned sieved chestnut skin into a 100ml centrifuge tube, add 50ml of complex heavy metal solution (SMS) with pH=1.0, shake at room temperature for 24h, centrifuge the mixture at 5000rmp for 20min, filter it with a 0.45um membrane, and measure the filtrate Medium heavy metals (cadmium, lead, copper, zinc) content.

[0018] The preparation of the complex heavy metal solution of the pH=1.0: 0.25mM PbNO 3 , CuNO 3 , CdNO 3 , ZnNO 3 Dissolve in 1L deionized water with 0.1M HNO 3 The solution was adjusted to pH = 1.0.

[0019] The 0.1M HNO 3 Solution preparation: Accurately take 5.5ml of concentrated nitric acid, and dilute to 1L with ionized water.

[0020] See Table 1 for the treatment effect. It can be seen that the concentration of heavy metal pollutants in the wa...

Embodiment 2

[0023] Dry the chestnut skins in a constant temperature oven at 65°C for 25 hours, grind, sieve, and take the chestnut skins with a particle size of 20 mesh for use.

[0024] Weigh 3.0 g of the above-mentioned sieved chestnut skin into a 100 ml centrifuge tube, add 50 ml of complex heavy metal solution (SMS) with pH=2.0, shake at room temperature for 24 hours, centrifuge the mixture at 5000 rpm for 20 minutes, filter it with a 0.45um membrane, and measure the filtrate Medium heavy metals (cadmium, lead, copper, zinc) content.

[0025] The preparation of the complex heavy metal solution of the pH=2.0: 0.25mM PbNO 3 , CuNO 3 , CdNO 3 , ZnNO 3 Dissolve in 1L deionized water with 0.1M HNO 3 The solution was adjusted to pH=2.0.

[0026] The 0.1M HNO 3 Solution preparation: Accurately take 5.5ml of concentrated nitric acid, and dilute to 1L with ionized water.

[0027] The treatment effect is shown in Table 2. It can be seen that the concentration of heavy metal pollutants in...

Embodiment 3

[0030] Dry the chestnut skins in a 70°C constant temperature box for 20 hours, grind them, and sieve them, and take the chestnut skins with a particle size of 40 mesh for use.

[0031] Weigh 2.0g of the chestnut skins sieved above into a 100ml centrifuge tube, add 50ml pH=3.0 composite heavy metal solution (SMS), shake at room temperature for 24h, centrifuge the mixture at 5000rmp for 20min, filter it with a 0.45um membrane, and measure Heavy metal (cadmium, lead, copper, zinc) content in the filtrate.

[0032] The preparation of the complex heavy metal solution of the pH=3.0: 0.25mM PbNO 3 , CuNO 3 , CdNO 3 , ZnNO 3 Dissolve in 1L deionized water with 0.1M HNO 3 The solution was adjusted to pH = 3.0.

[0033] The 0.1M HNO 3 Solution preparation: Accurately take 5.5ml of concentrated nitric acid, and dilute to 1L with ionized water.

[0034] The treatment effect is shown in Table 3. It can be seen that the concentration of heavy metal pollutants in the waste water is 0....

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Abstract

This invention relates to a method for processing acid heavy metal pollutant water, which utilizing skins of Chinese chestnuts as adsorbents to process acid heavy metal pollutant water. Advantages: low cost, good result and quick speed to remove infectants.

Description

technical field [0001] The invention relates to the treatment of acidic heavy metal polluted wastewater, in particular, a novel natural waste material is used as an adsorbent for the removal of heavy metal ions in the acidic polluted wastewater. Background technique [0002] Among the industrial "three wastes" pollution, mining and smelting processes are the most important sources of pollution that release heavy metals into the environment. Most of these pollution sources are point sources; among these point sources, the discharge of heavy metals in the form of sewage is the most common. Heavy metals not only cannot be biodegraded, but also can be continuously enriched in organisms through the food chain, and can even be converted into more toxic compounds, which can reach harmful levels to some organisms in the biological chain, and eventually accumulate in the human body and endanger the human body healthy. When the heavy metals in the soil reach a certain level, they can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C02F1/28
Inventor 李培军可欣张春桂
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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