High-adsorptivity heavy metal ion chelating agent containing dithiocar-bamate structure and preparation method thereof

A technology of heavy metal ions and chelating agents, applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as easy diffusion, secondary pollution, and limited application range of heavy metal chelating agents, etc. Application prospects, fast and effective separation effect

Active Publication Date: 2016-04-20
SHANDONG UNIV
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Problems solved by technology

[0006] However, the above-mentioned heavy metal chelating agent pH is not

Method used

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  • High-adsorptivity heavy metal ion chelating agent containing dithiocar-bamate structure and preparation method thereof
  • High-adsorptivity heavy metal ion chelating agent containing dithiocar-bamate structure and preparation method thereof
  • High-adsorptivity heavy metal ion chelating agent containing dithiocar-bamate structure and preparation method thereof

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[0009] The technical scheme of the present invention is as follows:

[0010] A heavy metal ion chelating agent having a structure shown in formula (I):

[0011]

[0012] In formula (I), 70%≤z≤90%, 29.75%≤x≤9%, 0.25%≤y≤1%; z, x, and y are the mole fractions of corresponding structural units, respectively.

[0013] According to the present invention, preferably, the specific surface area of ​​the heavy metal ion chelating agent is 70-110m 2 / g, the swelling ratio is 10-36 times.

[0014] The preparation method of the heavy metal ion chelating agent of the present invention includes the following steps:

[0015] (1) Preparation of crosslinking agent (B-BNVA)

[0016] Dissolve sodium hydride (NaH) in anhydrous N,N-dimethylformamide (DMF) and stir evenly to obtain a DMF solution of NaH;

[0017] Dissolve N-vinylacetamide (NVA) uniformly in anhydrous DMF to obtain a DMF solution of NVA;

[0018] Add the DMF solution of NVA dropwise to the DMF solution of NaH, continue to react for 0.5-2h after t...

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Abstract

The invention relates to a high-adsorptivity heavy metal ion chelating agent containing a dithiocar-bamate structure and a preparation method thereof. The chelating agent has a structure shown in a formula (I). The heavy metal ion chelating agent has a stable gel network framework structure, has easy water-absorbing swelling property and does not produce secondary pollution to a water body, meanwhile stronger coordination and chelation effects exist between dithiocarbamate groups and heavy metal ions, and accordingly rapid and effective separation of multiple types of heavy metal ions can be achieved, such as such as Cu<2+>, Cd2<2+>, Ni<+> and Hg2<2+>. (shown in the description).

Description

technical field [0001] The invention relates to a heavy metal ion chelating agent with high adsorption capacity and a preparation method thereof, belonging to the field of polymer gel synthesis. Background technique [0002] The increasing expansion of industrial activities and the massive discharge of industrial wastewater have caused serious pollution problems of heavy metal ions. Among them, the heavy metal ions that threaten the health of living bodies usually have Cd 2+ 、Cu 2+ , Hg 2+ 、As 3+ 、Ni 2+ , Pb 2+ Wait. Due to the high solubility, easy diffusion and easy permeability of heavy metal ions in water, water pollution has become one of the urgent problems to be solved in the construction of ecological civilization. [0003] In the treatment of water pollution by heavy metal ions, researchers have made a lot of attempts. Commonly used separation methods include ion exchange, chemical precipitation, coagulation / flocculation, and adsorption separation. Among th...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28C02F1/28C02F101/20
CPCB01J20/264B01J20/28016C02F1/285C02F1/288C02F2101/20
Inventor 谭业邦王鑫荆世尧
Owner SHANDONG UNIV
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