Biomass adsorbent prepared by acid hydrolysis

Abstract

The invention discloses an acidolysis prepared biomass adsorbent which comprises the following steps: firstly, waste biomass is dried, crushed, and screened from 20-mesh to 80-mesh; secondly, the screened waste biomass is put into a reactor, hydrochloric acid solution of 0.5-6.0 mol / L is added, and the weight percentage of the biomass is 1 to 10 percent; thirdly, the acidolysis lasts for 1 to 12 hours at 70-100 DEG C, and the processed product is washed, filtered, dried, crushed and screened from 20-mesh to 100-mesh, thereby preparing the biomass adsorbent; fourthly, the prepared biomass adsorbent is used for removing persistent organic pollutants in waste water or drinking source water, and the processed biomass adsorbent is regenerated and recycled at 200-400 DEG C and under the restrictive oxygen condition. The acidolysis prepared biomass adsorbent belongs to the second reclamation of the agricultural byproduct waste, and has the remarkable advantages that the prepared material comes from the nature, the reserves are rich, no toxic action exists, the preparation flow is simple, the cost is low, the purification efficiency of the adsorption material is obvious, and the recovery and the reuse after the adsorption treatment are easy.

Description

technical field [0001] The invention relates to an adsorbent, in particular to an acid hydrolysis preparation of a biomass adsorbent. Background technique [0002] Along with economic development, my country's organic micro-pollution (such as PAHs, PCBs, aromatic nitro compounds) is becoming more and more serious. Among them, trace organic pollutants often have high bioaccumulation and "three causes" effects, and the current treatment technology It is difficult to effectively remove such organic pollutants, which pose a serious threat to human health. It has become one of the focuses in the field of environmental science and engineering to find new cost-effective adsorbents suitable for organic pollution treatment, which involve activated carbon, organoclay, triolein-activated carbon composite adsorbent, etc., but are environmentally friendly. The development and application of biosorbents are almost nonexistent. [0003] Biosorbent (biosorbent) was first used to adsorb hea...

AI Technical Summary

Problems solved by technology

At present, more than 600 million tons of agricultural straw are produced in my country every year, about 80% of which are discarded or burned, which not only wastes a lot of energy, seriously pollutes the atmosphere, and endangers the health of the people, but the discarded straw in many areas has become a public hazard that needs to be solved urgently