Method for preparing heavy metal ion adsorbents from grafted modified cotton fibers
A technology of heavy metal ion and graft modification, which is applied in fiber treatment, plant fiber, chemical instruments and methods, etc., can solve the problems of water pollution and achieve uniform distribution of adsorption sites
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Embodiment 1
[0022] A method for preparing heavy metal ion adsorbent with grafted modified cotton fiber, is characterized in that, comprises the steps:
[0023] (1) Preparation of oxidized cotton fiber:
[0024] Soak 10 parts of cotton fiber in a sodium hydroxide solution with a concentration of 20g / L at 94-96°C for 1 hour at a bath ratio of 1:50, filter, wash, and dry, then add 18% of the cotton fiber at a bath ratio of 1:30 Soak in sodium hydroxide solution for 1 hour, wash until neutral, suction filter and dry, place in sodium periodate solution at a bath ratio of 1:30, oxidize at 70-73°C for 2 hours, then put glycerine After soaking in the alcohol solution for 20 hours, wash and dry to obtain oxidized cotton fibers, which are divided into two parts and set aside;
[0025] (2) Oxidized cotton fiber grafted with tetraethylenepentamine:
[0026] Put the oxidized cotton fiber obtained in one part (1) in the tetraethylenepentamine solution at a bath ratio of 1:50, graft reaction at 70-73°...
Embodiment 2
[0035] A method for preparing heavy metal ion adsorbent with grafted modified cotton fiber, is characterized in that, comprises the steps:
[0036] (1) Preparation of oxidized cotton fiber:
[0037] Soak 20 parts of cotton fibers in a sodium hydroxide solution with a concentration of 20g / L at 94-96°C for 2 hours at a bath ratio of 1:50, filter, wash, and dry, and then soak them in 18% sodium hydroxide solution at a bath ratio of 1:30. Soak in sodium hydroxide solution for 2 hours, wash until neutral, suction filter and dry, place in sodium periodate solution at a bath ratio of 1:30, oxidize at 70-73°C for 3 hours, then put glycerine After soaking in alcohol solution for 25 hours, wash and dry to obtain oxidized cotton fibers, which are equally divided into two parts for use;
[0038] (2) Oxidized cotton fiber grafted with tetraethylenepentamine:
[0039] Put the oxidized cotton fibers obtained in one part (1) in the tetraethylenepentamine solution at a bath ratio of 1:50, gr...
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