Biologic absorbent for adsorbing heavy metal and preparing method thereof

Abstract

The invention discloses a biological adsorbent adsorbing heavy metals by embedding kelp powder with sodium alginate and gelatin and a preparation method thereof. The biological adsorbent comprises 80-95 weight percent of kelp powder, 2-10 weight percent of sodium alginate, 2-8 weight percent of gelatin and residual impurity, wherein the impurity is calcium alginate, and the particle size of the biological adsorbent is in 1.5-3 mm. The method obtains the biological adsorbent adsorbing heavy metals by vacuum drying fresh kelp and comminuting the kelp by gas stream and then embedding the kelp with sodium alginate and gelatin liquid. The effluent which has the concentration less than or equal to100 mg / Land contains heavy metals such as nickel, cobalt, zinc, cadmium, copper and lead can be treated by the biological adsorbent, and the adsorption rate can reach 50-99 percent.

Description

technical field

[0001] The invention relates to a method for preparing a heavy metal biosorbent by embedding kelp powder with sodium alginate and gelatin. The biosorbent uses kelp as the biosorbent material, sodium alginate and gelatin as immobilized carriers, and is suitable for treating low-concentration (≤100mg / L) wastewater containing heavy metals such as nickel, cobalt, zinc, cadmium, copper and lead. Background technique

[0002] With the rapid development of the economy, people are paying more and more attention to the environment. How to eliminate the hazards of heavy metals and effectively recover precious metals in wastewater is a very prominent problem in today's environmental protection work. Traditional heavy metal treatment methods There are mainly chemical precipitation method, electrolysis method, ion exchange method, membrane treatment method and their mixed treatment methods, etc., but these methods have complex processes, cumbersome operations and high ope...

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