High-molecular heavy metal flocculant and preparation method thereof
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A heavy metal and flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, special compound water treatment, etc., can solve the problems of unstable residue, difficult recovery of precious metals, slow reaction, etc., and achieve molecular structure design Novel, strong heavy metal chelating ability, improved flocculation effect
Active Publication Date: 2015-03-25
王新军
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Due to the complex composition of heavy metal wastewater, large concentration differences, and strict treatment standards, the traditional treatment technology has problems such as large amount of tr
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Embodiment 1
[0043] A polymer heavy metal flocculant, the structural formula of its main component is as follows:
[0044]
[0045] Wherein n is an integer of 20-3000.
[0046] Preferably in the present invention, the appearance of the polymer heavy metal flocculant is white powder, and its solution is a colorless transparent liquid.
[0047] A preparation method of polymer heavy metal flocculant, comprising the following steps:
[0048] Step 1, put a part of carboxymethyl cellulose and acrylamide into the reactor at a mass ratio of 1:0.8, and then add 10 parts of water;
[0049] Step 2, heating the carboxymethyl cellulose, acrylamide and water added to the reactor in step 1 to 50°C, stirring with a stirrer and feeding nitrogen during the heating process;
[0050] Step 3: Heat carboxymethyl cellulose, acrylamide and water in the reactor to 50°C and keep the temperature constant. After 10 minutes, gradually add 0.1mol / L initiator, and then gradually add 0.1mol / L initiator after 15 minute...
Embodiment 2
[0056] A polymer heavy metal flocculant, the structural formula of its main component is as follows:
[0057]
[0058] Wherein n is an integer of 20-3000.
[0059] Preferably in the present invention, the appearance of the polymer heavy metal flocculant is white powder, and its solution is a colorless transparent liquid.
[0060] A preparation method of polymer heavy metal flocculant, comprising the following steps:
[0061] Step 1, put a part of carboxymethyl cellulose and acrylamide into the reactor at a mass ratio of 1:0.8, and then add 10 parts of water;
[0062] Step 2, heating the carboxymethyl cellulose, acrylamide and water added to the reactor in step 1 to 60°C, stirring with a stirrer and feeding nitrogen during the heating process;
[0063] Step 3: Heat the carboxymethyl cellulose, acrylamide and water in the reactor to 60°C and keep the temperature constant. After 10 minutes, gradually add 0.1mol / L initiator, and then gradually add 0.1mol / L initiator after 15 ...
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Abstract
The invention discloses a high-molecular heavy metal flocculant and a preparation method thereof. The high-molecular heavy metal flocculant forms white powder in appearance, and a solution of the high-molecular heavy metal flocculant is colorless transparent liquid. The preparation method of the high-molecular heavy metal flocculant comprises the following steps of: adding 1 part of carboxymethyl cellulose and acrylamide to a reaction kettle according to a molecular weight ratio of 1 to 0.8, then adding 10 parts of water, heating to 50-60 DEG C, and introducing nitrogen under the action of mechanical stirring; keeping temperature at 50-60 DEG C, gradually adding 0.1 mol/L of initiating agents after 10 minutes, and gradually adding 0.1 mol/L of emulsifying agents after 15 minutes, and removing the nitrogen after the addition is completed for 30 minutes; continuing at constant temperature of 50-60 DEG C for 2.5 hours to prepare a polyacrylamide graft copolymer; cooling the reaction kettle to 30 degrees, adding NaOH and 2-sulfhydryl ethanesulfonic acid under the action of mechanical stirring, and carrying out amidation reaction for 3 hours under an alkaline condition, wherein the weight percentage ratio of NaOH to 2-2-sulfhydryl ethanesulfonic acid is 1:1.2. The high-molecular heavy metal flocculant disclosed by the invention can be used for treating the heavy metal ions contained in waste water and can also be used for the treatment of sludge.
Description
technical field [0001] The invention belongs to the field of heavy metal sewage treatment, in particular to a polymer heavy metal flocculant and a preparation method thereof. Background technique [0002] Trace amounts of heavy metal elements are essential to human health, but if there are too many heavy metal pollutants in the environment, it will cause great harm to the human body, and heavy metal pollution is especially harmful to people at the end of the food chain. Heavy metals can strongly interact with proteins and various enzymes in the human body, making them inactive, and may also accumulate in certain organs of the human body. If the human body exceeds the tolerance limit, it will cause acute poisoning, Subacute poisoning, chronic poisoning, etc., will cause great harm to the human body. For example, Minamata disease (mercury pollution) and bone pain disease (cadmium pollution) and other public nuisance diseases that occurred in Japan are all caused by heavy metal...
Claims
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