A kind of preparation method and application of mercapto silk adsorbent

Abstract

The invention discloses a preparation method and an application technique of a sulfydryl silk adsorbent. The preparation method of the sulfydryl silk adsorbent is characterized by comprising the following steps: adding the following components in percentage by weight concentration: 35-50% of mercaptoacetic acid, 30-55% of tetrahydrofurfuryl alcohol, 8-27% of degumming silk, 0.15-1.0% of concentrated sulfuric acid in a reactor, stirring the components at constant temperature of 60-70 DEG C, carrying out reflux reaction for 4-6 hours, then washing by deionized water, performing suction filtration until filtrate is neutral, washing by a small amount of ethyl alcohol, putting into a baking oven at 45 DEG C, and drying so as to obtain the sulfydryl silk adsorbent. The sulfydryl silk adsorbent is high in adsorption quantity to metal ions, has a sulfydryl characteristic, can directly adsorb and dilute various metal ions in a water body, is high in adsorption efficiency, is high in adsorption speed, has the favorable physical, chemical and mechanical stability, not only is low in cost, but also has the environmental-friendly effect.

Description

technical field [0001] The invention relates to a preparation method and application technology of an adsorbent for metal ions in a water system, in particular to a preparation method of a mercapto silk adsorbent and an application technology for adsorbing metal ions in water. Background technique [0002] Silk (silk) is a continuous long fiber that is coagulated by the silk liquid secreted by cooked silkworms when they cocoon. It is also called natural silk and is a natural fiber. One of the earliest animal fibers used by human beings. Silk is the lightest, softest and thinnest natural fiber in nature. It can be easily restored to its original shape after the removal of external force. Warm, warm but not dry. Mulberry silk is mainly composed of animal protein, rich in 18 kinds of amino acids necessary for the human body, can promote the vitality of skin cells, and is known as "the second skin of the human body" and "the queen of fiber". The silk fibers of silkworm cocoons...

AI Technical Summary

Problems solved by technology

The patent with the application number: 201110276212.9 discloses the preparation method and application of mercapto-flax. It is characterized in that: in a corked Erlenmeyer flask, it is added according to the following composition mass percentage, thioglycolic acid: 45-52%, tetrahydrofuran: 35-40% , degummed flax: 23~30%, glacial acetic acid: 1~1.5%, concentrated sulfuric acid: 0.15~0.3%, stoppered, at 50~60℃, reflux under stirring for 4~6h, then wash with deionized water and filter with suction , until the filtrate is neutral, after washing with a small amount of ethanol, put it in a 35°C oven and dry to obtain mercapto flax, which has a strong effect on Cd 2+ The adsorption capacity can be as high as 282mg / g, and the highest adsorption rate can reach 99.6%. 2+ The maximum adsorption capacity is 519mg / g, for Cu 2+ The maximum adsorption capacity is 160mg / g; there is no report on the chemical modification and adsorption performance of silk at home and abroad.