Preparation method and application of sulfydryl palm bark adsorbent

Abstract

The invention discloses a preparation method and an application technology of a sulfydryl palm bark adsorbent. The method is characterized by comprising the following steps of: adding 30 to 45 mass percent of thioglycolic acid, 25 to 40 mass percent of tetrahydrofuran, 20 to 35 mass percent of alkalized palm bark, 0.5 to 2.5 mass percent of glacial acetic acid and 0.15 to 0.3 mass percent of concentrated sulfuric acid into a triangular flask with a plug, wherein the mass percent of the components is 100%; plugging the triangular flask; carrying out a stationary reaction for 48-60 hours at the temperature of 40-45 DEG C; then washing with deionized water and filtering under vacuum till the filtrate is neutral; washing with a small amount of ethanol; and drying in an oven at the temperature of 35-45 DEG C so as to obtain the sulfydryl palm bark adsorbent. The sulfydryl palm bark adsorbent has high metal iron absorbability and sulfydryl characteristics, and can absorb and elute various metal ions in water; the sulfydryl palm bark adsorbent is high in absorption efficiency and speed and good in physical, chemical and mechanical stability; due to the high regenerability of the sulfydryl palm bark adsorbent, the repeated use times of the sulfydryl palm bark adsorbent is higher than that of sulphydryl cotton by 40 percent; the cost is saved; and the environment pollution is avoided.

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 and application technology of a mercapto palm bark adsorbent. Background technique [0002] Palm tree is a perennial evergreen tree plant, up to 7 meters high; the trunk is erect, unbranched, and covered by a brown coat formed by leaf sheaths; therefore, the fibers of the palm bark are very long and strong, and are usually used to make mattresses , is one of the most precious ecological resources and a renewable resource. At present, palm trees are widely planted in the area south of the Yangtze River and are very precious long-fiber raw materials. The application of this natural polymer material to make adsorption has the characteristics of natural, green and biodegradable. [0003] Since 1971, Nishisueo et al. in Japan first connected thiol groups to the macromolecular chains of absorbent c...

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 4~6 hours, then wash with deionized water, pump Filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in an oven at 35°C 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 palm bark at home and abroad.