Use of poly 1,8-naphthalene diamine as mercury ionic adsorption agent

A mercury ion, naphthalene diamine technology, applied in the field of poly-1, can solve the problem of difficult recovery of water bodies, and achieve the effects of excellent adsorption performance, increased adsorption temperature, and large adsorption capacity

Inactive Publication Date: 2006-07-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Once a water body is contaminated wit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1:

[0020] Take 50 mg of poly 1,8-naphthalenediamine and put it into 25 mL of mercury nitrate solution with an initial concentration of 786 mg / L at 30°C. Stir and adsorb for 72 hours. After filtering with filter paper, the content of mercury ions in the filtrate is determined by EDTA titration. The experiment shows that this Under this condition, the adsorption rate is 99.5%, and the adsorption capacity is 391.2mg / g.

Example Embodiment

[0021] Example 2:

[0022] When the initial mercury nitrate solution was 1283 mg / L, other conditions were the same as in Example 1. The mercury ion content in the filtrate was measured by EDTA titration. The experiment showed that the adsorption rate under this condition was 98.6%, and the adsorption capacity reached 632.9 mg / g.

Example Embodiment

[0023] Example 3:

[0024] When the initial mercury nitrate solution was 1886 mg / L, the remaining conditions were the same as in Example 1. The mercury ion content in the filtrate was determined by EDTA titration. The experiment showed that the adsorption rate under this condition was 88.6% and the adsorption capacity was 835.3 mg / g.

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Abstract

The invention discloses a mercury ion adsorbent usage based on the polymeric 1, 8-naphthidine in the chemical separation technique domain, which is characterized by the following: the polymer can adsorb the mercury ion effectively, which is 16 times more than active carbon; the adsorbed solution density is lower than national regular discharge standard (0.05mg/L).

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and specifically relates to the use of poly-1,8-naphthalene diamine as a mercury ion adsorbent. Background technique [0002] Mercury, commonly known as mercury, ranks first among the top ten pollutants on the earth. Its toxicity is very severe, in addition to obvious neurotoxicity, it also has adverse effects on the endocrine system and immune system. In addition, the ability of mercury to be enriched through the food chain is amazing, freshwater phytoplankton can enrich mercury 1000 times, and freshwater invertebrates can be as high as 100,000 times. Once a water body is contaminated with mercury, it is very difficult to recover. [0003] Mercury-containing industrial wastewater mainly comes from wastewater discharged from industries such as chemical industry, metallurgy, and machinery. The main pollution source of mercury in the wastewater discharged from chlor-alkali industry, ...

Claims

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Application Information

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IPC IPC(8): B01J20/26C02F1/28C02F1/62C02F101/20
Inventor 李新贵易辉黄美荣
Owner TONGJI UNIV
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