Heavy metal trapping agent for wastewater treatment

A heavy metal trapping agent and wastewater treatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of high adsorbent price, high metal concentration in effluent, short service life, etc. , to achieve the effect of improving the capture capacity and good capture effect

Inactive Publication Date: 2019-05-07
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the chemical method is simple in process and easy to operate, but there are many problems such as high metal concentration in the effluent, large amount of waste residue, easy to produce secondary pollution, and difficult to reuse wastewater.
Physical and chemical methods mainly include coagulation method, adsorption method and membrane treatment technology, etc. Adsorption method has high removal efficiency and simple operation, but the price of adsorbent is high and regeneration efficiency is low; coagulation method uses aluminum salt or iron salt as coagulant, It may cause secondary pollution; the membrane treatment method can recover useful substances while treating wastewater, but there are problems such as easy fouling of the membrane and short service life
Biological treatment of heavy metal wastewater has no secondary pollution, easy management, low cost, high benefit, and has broad application prospects. However, there are problems such as low toxicity of bacteria and microorganisms resistant to heavy metals, and difficulty in storage. They are generally in the laboratory research stage.
In order to meet the increasingly stringent environmental protection requirements and achieve wastewater reuse and heavy metal recovery at the same time, it is difficult for a single treatment technology to meet the development needs of the industry

Method used

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  • Heavy metal trapping agent for wastewater treatment
  • Heavy metal trapping agent for wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The heavy metal trapping agent for wastewater treatment of this embodiment, the raw material of the treatment agent comprises the following components by weight: 20 parts of olive pomace, 10 parts of olive sawdust, 5 parts of nitro humic acid resin, 2,4 , 5 parts of 6-trimercapto-1,3,5-triazine trisodium salt, 4 parts of magnetic biochar, 3 parts of pyrrolidine ammonium dithioformate chelated cellulose, N,N'-bis(2-mercapto Ethyl)—3 parts of 1,3-phthalamide, 5 parts of hexathioguanidinocarboxylic acid, 1 part of crosslinking agent, 5 parts of sulfonated thiacalixarene, 5 parts of sodium sulfide, 4 parts of modified sericin , 2 parts of polyaspartic acid, 3 parts of β-cyclodextrin, 1 part of thiocarbazide, 1 part of accelerator, N,N,N,N-(1,2,4,5-tetramercaptoethyl ) 2 parts of pyromellitamide;

[0024] Wherein, the olive pomace is processed in the following manner: a. The wet olive pomace is dried in an oven at 75°C until the water content is less than 5%, crushed to a p...

Embodiment 2

[0037] The heavy metal trapping agent for wastewater treatment of the present embodiment, the raw material of the treatment agent comprises the following components by weight: 30 parts of olive pomace, 20 parts of olive sawdust, 15 parts of nitro humic acid resin, 2,4 , 15 parts of 6-trimercapto-1,3,5-triazine trisodium salt, 12 parts of magnetic biochar, 8 parts of pyrrolidine ammonium dithioformate chelated cellulose, N,N'-bis(2-mercapto Ethyl)-1,3-phthalamide 8 parts, hexathioguanidinocarboxylic acid 10 parts, crosslinking agent 3 parts, sulfonated thiacalixarene 10 parts, sodium sulfide 10 parts, modified sericin 8 parts , 6 parts of polyaspartic acid, 9 parts of β-cyclodextrin, 5 parts of thiocarbazide, 1-4 parts of accelerator, N,N,N,N-(1,2,4,5-tetramercapto 8 parts of ethyl) pyromellitamide;

[0038] Wherein, the olive pomace is processed in the following manner: a. The wet olive pomace is dried in an oven at 85°C until the water content is less than 5%, crushed to a p...

Embodiment 3

[0051] The heavy metal trapping agent for wastewater treatment of this embodiment, the raw material of the treatment agent comprises the following components by weight: 20 parts of olive pomace, 20 parts of olive sawdust, 5 parts of nitro humic acid resin, 2,4 , 15 parts of 6-trimercapto-1,3,5-triazine trisodium salt, 4 parts of magnetic biochar, 8 parts of pyrrolidine ammonium dithioformate chelated cellulose, N,N'-bis(2-mercapto Ethyl)—3 parts of 1,3-phthalamide, 10 parts of hexathioguanidinocarboxylic acid, 1 part of crosslinking agent, 10 parts of sulfonated thiacalixarene, 5 parts of sodium sulfide, 8 parts of modified sericin , 2 parts of polyaspartic acid, 9 parts of β-cyclodextrin, 1 part of thiocarbazide, 4 parts of accelerator, N,N,N,N-(1,2,4,5-tetramercaptoethyl ) 2 parts of pyromellitamide;

[0052] Wherein, the olive pomace is processed in the following manner: a. The wet olive pomace is dried in an oven at 75°C until the water content is less than 5%, crushed to...

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Abstract

The invention discloses a heavy metal trapping agent for wastewater treatment. The trapping agent includes olea europaea pomace, olea europaea sawdust, 2, 4, 6-trimercapto-1, 3, 5-triazine trisodium salt, magnetic biochar, pyrrolidine dithiocarbamate chelated cellulose, N, N'-bis(2-mercaptoethyl)-1, 3-phenyldicarbonamide, hexathioguanidine formic acid, a crosslinking agent, sulfonated thiacalixarene, sodium sulfide, modified sericin, polyaspartic acid, beta-cyclodextrin, thiocarbazide, an accelerant, N, N, N, N-(1, 2, 4, 5-tetramercaptoethyl)benzenetetraamide. The trapping agent is used for treating mixed heavy metal wastewater, through the synergistic effect of all components, can improve the trapping ability of heavy metals with weak competitive trapping ability in the mixed system, through mutual cooperation and promotion, can overcome the antagonistic or competitive effect among various ions, gives full play to the advantages of all treatment methods, can treatment Cu<2+>, Cd<2+>,Hg<2+>, Pb<2+>, Mn<2+>, Ni<2+>, Zn<2+>, Cr<3+>, Cr<6+> and various heavy metals in wastewater, and especially has very good trapping effect Cr<6+>.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a heavy metal trapping agent for waste water treatment. Background technique [0002] Heavy metal wastewater mainly comes from mining, non-ferrous metal smelting, machining, electroplating, etc. Most of them contain heavy metal elements such as lead, zinc, chromium, arsenic, cadmium, nickel, copper, etc., which seriously pollute the environment. In addition, due to the high solubility of heavy metal ions in water, they are easily absorbed by organisms, thus enter the food chain, and eventually accumulate in the human body. When accumulated to a certain extent, they will cause great harm to human health. Existing technologies are generally divided into chemical methods, physical chemical methods and biological methods. Among them, the chemical method has a simple process and is easy to operate, but there are many problems such as high metal concentration in the effluent, larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C02F101/20C02F101/22
Inventor 关伟杜建伟李开明温勇张明杨贺框
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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