An environmentally friendly treating agent for heavy-metal wastewater

A sewage treatment agent and heavy metal technology, which is applied in water/sewage treatment, adsorbed water/sewage treatment, neutralized water/sewage treatment, etc. Simple effect of raw materials

Inactive Publication Date: 2018-03-09

李长沛

5 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The existing treatment agents for heavy metal wastewater treatment mostly use organic reagents to treat heavy metal-containing sewage. Although good results can be achieved, organic reagents pollute the water body to a certain extent and ar...

Abstract

An environmentally friendly treating agent for heavy-metal wastewater is disclosed. The treating agent includes, by weight, 30-60 parts of activated carbon, 10-30 parts of calcium hydroxide, 5-15 parts of alum, 10-20 parts of ferric chloride, 20-50 parts of sepiolite, 8-35 parts of natural bleaching clay, 3-10 parts of calcium aluminate and 15-30 parts of magnesium carbonate. The treating agent can form an alkaline environment, can form colloid in a water body and can effectively promote precipitation of heavy metal ions. Raw materials are simple and cheap. The production cost is low. The treating agent is suitable for large-scale industrial application and is high in practicality.

Application Domain

Water contaminantsWater/sewage treatment by neutralisation +2

Technology Topic

ChemistryActivated carbon +13

Examples

Experimental program(7)

Example Embodiment

[0017] Example 1

[0018] An environment-friendly heavy metal sewage treatment agent, comprising the following components by weight: 30 parts of activated carbon, 30 parts of calcium hydroxide, 5 parts of alum, 20 parts of ferric chloride, 20 parts of sepiolite, 35 parts of natural bleaching earth, aluminum 3 parts of calcium carbonate, 30 parts of magnesium carbonate.

[0019] Wherein, the activated carbon is activated carbon made from bamboo charcoal.

[0020] The preparation method of described environment-friendly heavy metal sewage treatment agent comprises the following steps:

[0021] 1) Calcium hydroxide, ferric chloride, sepiolite, natural fuller's earth, calcium aluminate and magnesium carbonate are pulverized and mixed thoroughly, dried at 80°C for 6 hours, and then calcined at 500°C for 5 hours to obtain a calcined mixture ;

[0022] 2) Put the activated carbon into the crushing equipment, crush it to 80 mesh, then put it into the granulator, add alum and the calcined mixture prepared in step 1), and granulate it at low temperature. Remember to make an environmentally friendly heavy metal sewage treatment agent.

[0023] Wherein, the particle size of the granulation in step 2) is 3 mm.

Example Embodiment

[0024] Example 2

[0025] An environment-friendly heavy metal sewage treatment agent, comprising the following components by weight: 60 parts of activated carbon, 10 parts of calcium hydroxide, 15 parts of alum, 10 parts of ferric chloride, 50 parts of sepiolite, 8 parts of natural bleaching earth, aluminum Calcium acid 10 parts, magnesium carbonate 15 parts.

[0026] Wherein, the activated carbon is activated carbon made of charcoal as a raw material.

[0027] The preparation method of described environment-friendly heavy metal sewage treatment agent comprises the following steps:

[0028] 1) Grind calcium hydroxide, ferric chloride, sepiolite, natural bleaching earth, calcium aluminate, and magnesium carbonate, mix them thoroughly, dry at 90°C for 3 hours, and then calcinate at 650°C for 3 hours to obtain a calcined mixture ;

[0029] 2) Put the activated carbon into the crushing equipment, crush it to 125 mesh, then put it into the granulator, add alum and the calcined mixture prepared in step 1), and granulate at low temperature, remember to make an environmentally friendly heavy metal sewage treatment agent.

[0030] Wherein, the particle size of the granulation in step 2) is 1 mm.

Example Embodiment

[0031] Example 3

[0032] An environment-friendly heavy metal sewage treatment agent, comprising the following components by weight: 35 parts of activated carbon, 15 parts of calcium hydroxide, 10 parts of alum, 15 parts of ferric chloride, 25 parts of sepiolite, 20 parts of natural bleaching earth, aluminum 5 parts of calcium carbonate, 20 parts of magnesium carbonate.

[0033] Wherein, the activated carbon is activated carbon made from coconut shell charcoal.

[0034] The preparation method of described environment-friendly heavy metal sewage treatment agent comprises the following steps:

[0035] 1) Calcium hydroxide, ferric chloride, sepiolite, natural fuller's earth, calcium aluminate, and magnesium carbonate were pulverized and mixed thoroughly, dried at 85°C for 5 hours, and then calcined at 600°C for 4 hours to obtain a calcined mixture ;

[0036] 2) Put the activated carbon into the crushing equipment, crush it to 100 mesh, then put it into the granulator, add alum and the calcined mixture prepared in step 1), and granulate at low temperature. Remember to make an environmentally friendly heavy metal sewage treatment agent.

[0037] Wherein, the particle diameter of the granulation in step 2) is 2 mm.

PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.