Heavy metal wastewater treatment medicament and treatment method of heavy metal wastewater

A technology for sewage treatment and heavy metal scavenger, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Simple, favorable for sedimentation, and the effect of improving hydrophobicity

Active Publication Date: 2016-02-03
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the low concentration of heavy metal wastewater, complex components, and strict treatment standards, the existing water treatment chemicals may be able to treat heavy metal ions in industrial wastewater, but they cannot ac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Take 1L of chemical wastewater, add NaOH solution to the wastewater, adjust the pH of the wastewater to 8.0-9.0, then add heavy metal sewage treatment chemicals, the amount of heavy metal sewage treatment chemicals added is 0.04% of the weight of chemical wastewater, and stir quickly for 10s. Then stir at a slow speed for 20 minutes, stop the stirring, let stand for 10 minutes, remove the resulting precipitate by suction filtration, and collect the clear liquid.

[0028] The concentration of heavy metal ions in the wastewater after treatment is: copper ions 0.48mg / L, zinc ions 0.89mg / L, lead ions 0.29mg / L, and iron ions 0.25mg / L to meet the discharge requirements.

[0029] The chemical wastewater used contains 105 mg / L of copper ions, 10 mg / L of zinc ions, 3.5 mg / L of lead ions, and 95 mg / L of iron ions.

[0030] The heavy metal sewage treatment agent includes the following raw materials in parts by weight: 1 part by weight of cationic polyacrylamide, 5 parts...

Embodiment 2

[0033] Example 2: Take 1L of chemical wastewater, first use NaOH to adjust the pH of the wastewater to 8.0-9.0, then add heavy metal sewage treatment agents, the amount of heavy metal sewage treatment agents is 0.06% of the weight of chemical wastewater, stir quickly for 10s, then slowly Stir for 20 minutes, stop stirring, let stand for 10 minutes to separate layers, remove the resulting precipitate by suction filtration, and collect the clear liquid.

[0034] The concentration of heavy metal ions in the waste water after treatment is: copper ions 0.40mg / L, zinc ions 0.80mg / L, lead ions 0.23mg / L, iron ions 0.18mg / L, meeting the discharge requirements.

[0035] The chemical wastewater used contains 105 mg / L of copper ions, 10 mg / L of zinc ions, 3.5 mg / L of lead ions, and 95 mg / L of iron ions.

[0036] The heavy metal sewage treatment agent includes the following raw materials in parts by weight: 1 part by weight of cationic polyacrylamide, 5 parts by weight of anionic polyacryl...

Embodiment 3

[0039] Example 3: Take 1L of chemical wastewater, first use NaOH to adjust the pH of the wastewater to 8.0-9.0, then add heavy metal sewage treatment agents, the amount of heavy metal sewage treatment agents is 0.08% of the weight of chemical wastewater, stir quickly for 10s, and then slowly stir After 20 minutes, the stirring was stopped, and the layers were allowed to stand for 10 minutes. The resulting precipitate was removed by suction filtration, and the clear liquid was collected.

[0040] The concentration of heavy metal ions in wastewater after treatment is: copper ions are 0.28mg / L, zinc ions are 0.69mg / L, lead ions are 0.20mg / L, and iron ions are 0.14mg / L, meeting the discharge requirements.

[0041] The chemical wastewater used contains 105 mg / L of copper ions, 10 mg / L of zinc ions, 3.5 mg / L of lead ions, and 95 mg / L of iron ions.

[0042] The heavy metal sewage treatment agent includes the following raw materials in parts by weight: 1 part by weight of cationic pol...

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PUM

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Abstract

The invention relates to a heavy metal wastewater treatment medicament. The heavy metal wastewater treatment medicament comprises the following raw materials by weight: 1 part of cationic polyacrylamide, 3 to 8 parts of anionic polyacrylamide, 10 to 30 parts of an inorganic flocculating agent, 1 to 3 parts of a heavy metal chelating agent, and 58 to 85 parts of an absorbent. The invention further provides a heavy metal wastewater treatment method which comprises the following steps: taking 1 L of chemical wastewater; adding a NaOH solution into the wastewater till the pH of the obtained solution is 8.0 to 9.0; adding the heavy metal wastewater treatment medicament into the obtained solution, wherein the addition volume of the heavy metal wastewater treatment medicament is 0.04 to 0.08 percent of the weight of the chemical wastewater; stirring fast for 10 seconds; stirring slowly for 20 minutes; stopping stirring; allowing the obtained liquid to stand still for 10 minutes for layering. The heavy metal wastewater treatment medicament and the heavy metal wastewater treatment method have the benefits that 1, the preparation is simple; 2, the molecular weight of cationic polyacrylamide is low, and positive charge groups of cationic polyacrylamide can adsorb negative charges of bentonite, so that a filtration aiding system of a tight structure is formed; 3, anionic polyacrylamide is high in molecular weight, so as to subside fast and generate thick floc.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a heavy metal sewage treatment agent and a treatment method thereof. Background technique [0002] With the rapid development of industrial and agricultural economy, the discharge of wastewater is increasing day by day. A large amount of industrial wastewater containing heavy metals and urban domestic sewage are discharged into the environment, causing serious pollution to the atmosphere, soil and water environment. Heavy metal wastewater contains arsenic, mercury, lead, copper, zinc, chromium, nickel and other elements. Most of the heavy metal wastewater comes from electroplating, mining, chemical industry and other departments. The type, content and existing form of heavy metal ions in wastewater vary with different production types. big difference. Due to the characteristics of strong toxicity, persistence, and non-degradability of heavy metal ions, once heavy metals...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/52C02F1/28C02F1/58C02F101/20
Inventor 田民格史海岭谷继永殷树梅
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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