Heavy metal trapping agent for sewage treatment and preparation method thereof

Abstract

The invention discloses a heavy metal trapping agent for sewage treatment and a preparation method thereof. The heavy metal trapping agent for sewage treatment comprises, by weight, sodium lignin sulfonate, sodium tripolyphosphate, dichloroethane, soyabean protein, potassium hydroxide, urea, carbon disulfide, a cross-linking agent, montmorillonite, a surface active agent and ethidene diamine. The cross-linking agent is a compound of one, two or more of epoxy chloropropane, epoxy chlorobutane, glyoxal, malondialdehyde, glutaraldehyde, adipaldehyde and phthalic aldehyde. According to the heavy metal trapping agent for sewage treatment, the dual functions of trapping and flocculating can be similarly brought into play on low-concentration heavy metal sewage ion, practical performance of products is greatly promoted, the tripping capacity is high, the treatment effect of heavy metal with various forms is good, secondary pollution is avoided, and cost is low. The technique is simple, the sedimentation velocity is large, and stability is good.

Description

technical field

[0001] The invention relates to the technical field of heavy metal treatment, in particular to a heavy metal scavenger for sewage treatment and a preparation method thereof. Background technique

[0002] In today's industrial society, heavy metal wastewater comes from a wide range of sources, mainly from wastewater discharged from mining, smelting, electrolysis, electroplating, pesticides, medicines, paints, pigments and other enterprises. However, the heavy metal content and form of heavy metals in wastewater discharged from various industries are different, and the forms of heavy metals in wastewater discharged by a single enterprise may also be different, so it is difficult to use a single agent to remove heavy metals in wastewater.

[0003] Among the existing agents for treating heavy metals in water, the most conventional Na2S or ferrous sulfate is generally added to the wastewater containing heavy metals, so that the heavy metals in the water are reduce...

Examples

Embodiment 1

[0020] A heavy metal scavenger for sewage treatment, the raw materials according to parts by weight include: 20 parts of sodium lignosulfonate, 5 parts of sodium tripolyphosphate, 10 parts of dichloroethane, 20 parts of soybean protein, 40 parts of potassium hydroxide, urea 5 parts, 20 parts of carbon disulfide, 10 parts of crosslinking agent, 10 parts of montmorillonite, 2 parts of surfactant, 20 parts of ethylenediamine.

[0021] The preparation method of the heavy metal scavenger for sewage treatment, the specific steps are as follows:

[0022] (1) take each raw material according to parts by weight;

[0023] (2) After the montmorillonite is activated with an acid solution, it is cleaned 3 times with deionized water until the pH value of the deionized water after cleaning is greater than 6.5; adding deionized water and stirring to make a montmorillonite with a mass percentage concentration of 15% suspension slurry;

[0024] (3) The surfactant is configured into a surfacta...

Embodiment 2

[0028] A heavy metal scavenger for sewage treatment, the raw materials according to parts by weight include: 25 parts of sodium lignosulfonate, 8 parts of sodium tripolyphosphate, 11 parts of dichloroethane, 25 parts of soybean protein, 45 parts of potassium hydroxide, urea 6 parts, 21 parts of carbon disulfide, 11 parts of crosslinking agent, 15 parts of montmorillonite, 3 parts of surfactant, 25 parts of ethylenediamine.

[0029] The preparation method of the heavy metal scavenger for sewage treatment, the specific steps are as follows:

[0030] (1) take each raw material according to parts by weight;

[0031] (2) After the montmorillonite is activated with an acid solution, it is cleaned 4 times with deionized water until the pH value of the deionized water after cleaning is greater than 6.5; adding deionized water and stirring to make a montmorillonite with a mass percentage concentration of 16% suspension slurry;

[0032] (3) The surfactant is configured into a surfacta...

Embodiment 3

[0036] A heavy metal scavenger for sewage treatment, the raw materials according to parts by weight include: 30 parts of sodium lignosulfonate, 10 parts of sodium tripolyphosphate, 12 parts of dichloroethane, 30 parts of soybean protein, 50 parts of potassium hydroxide, urea 8 parts, 22 parts of carbon disulfide, 12 parts of crosslinking agent, 20 parts of montmorillonite, 4 parts of surfactant, 30 parts of ethylenediamine.

[0037] The preparation method of the heavy metal scavenger for sewage treatment, the specific steps are as follows:

[0038] (1) take each raw material according to parts by weight;

[0039] (2) After the montmorillonite is activated with an acid solution, it is cleaned 5 times with deionized water until the pH value of the deionized water after cleaning is greater than 6.5; adding deionized water and stirring to make a montmorillonite with a mass percentage concentration of 18% suspension slurry;

[0040] (3) The surfactant is configured into a surfact...

technical field

[0001] The invention relates to the technical field of heavy metal treatment, in particular to a heavy metal scavenger for sewage treatment and a preparation method thereof. Background technique

[0002] In today's industrial society, heavy metal wastewater comes from a wide range of sources, mainly from wastewater discharged from mining, smelting, electrolysis, electroplating, pesticides, medicines, paints, pigments and other enterprises. However, the heavy metal content and form of heavy metals in wastewater discharged from various industries are different, and the forms of heavy metals in wastewater discharged by a single enterprise may also be different, so it is difficult to use a single agent to remove heavy metals in wastewater.

[0003] Among the existing agents for treating heavy metals in water, the most conventional Na2S or ferrous sulfate is generally added to the wastewater containing heavy metals, so that the heavy metals in the water are reduce...

Examples

Embodiment 1

[0020] A heavy metal scavenger for sewage treatment, the raw materials according to parts by weight include: 20 parts of sodium lignosulfonate, 5 parts of sodium tripolyphosphate, 10 parts of dichloroethane, 20 parts of soybean protein, 40 parts of potassium hydroxide, urea 5 parts, 20 parts of carbon disulfide, 10 parts of crosslinking agent, 10 parts of montmorillonite, 2 parts of surfactant, 20 parts of ethylenediamine.

[0021] The preparation method of the heavy metal scavenger for sewage treatment, the specific steps are as follows:

[0022] (1) take each raw material according to parts by weight;

[0023] (2) After the montmorillonite is activated with an acid solution, it is cleaned 3 times with deionized water until the pH value of the deionized water after cleaning is greater than 6.5; adding deionized water and stirring to make a montmorillonite with a mass percentage concentration of 15% suspension slurry;

[0024] (3) The surfactant is configured into a surfacta...

Embodiment 2

[0028] A heavy metal scavenger for sewage treatment, the raw materials according to parts by weight include: 25 parts of sodium lignosulfonate, 8 parts of sodium tripolyphosphate, 11 parts of dichloroethane, 25 parts of soybean protein, 45 parts of potassium hydroxide, urea 6 parts, 21 parts of carbon disulfide, 11 parts of crosslinking agent, 15 parts of montmorillonite, 3 parts of surfactant, 25 parts of ethylenediamine.

[0029] The preparation method of the heavy metal scavenger for sewage treatment, the specific steps are as follows:

[0030] (1) take each raw material according to parts by weight;

[0031] (2) After the montmorillonite is activated with an acid solution, it is cleaned 4 times with deionized water until the pH value of the deionized water after cleaning is greater than 6.5; adding deionized water and stirring to make a montmorillonite with a mass percentage concentration of 16% suspension slurry;

[0032] (3) The surfactant is configured into a surfacta...

Embodiment 3

[0036] A heavy metal scavenger for sewage treatment, the raw materials according to parts by weight include: 30 parts of sodium lignosulfonate, 10 parts of sodium tripolyphosphate, 12 parts of dichloroethane, 30 parts of soybean protein, 50 parts of potassium hydroxide, urea 8 parts, 22 parts of carbon disulfide, 12 parts of crosslinking agent, 20 parts of montmorillonite, 4 parts of surfactant, 30 parts of ethylenediamine.

[0037] The preparation method of the heavy metal scavenger for sewage treatment, the specific steps are as follows:

[0038] (1) take each raw material according to parts by weight;

[0039] (2) After the montmorillonite is activated with an acid solution, it is cleaned 5 times with deionized water until the pH value of the deionized water after cleaning is greater than 6.5; adding deionized water and stirring to make a montmorillonite with a mass percentage concentration of 18% suspension slurry;

[0040] (3) The surfactant is configured into a surfact...