3 results about "Phenol adsorption" patented technology

The invention discloses a desorption regeneration method of chlorinated phenol adsorption resin, which comprises the following steps: adsorbing 2, 4-dichlorophenol by using macroporous adsorption resin to obtain a byproduct 5-crude hydrochloric acid, then respectively carrying out desorption regeneration by using a first regenerant and a second regenerant, washing the obtained resin with water, and recycling to adsorb impurities in the crude hydrochloric acid. And the first regenerant and the second regenerant can be uniformly collected, separated and recycled. According to the method, methylbenzene and alcohol substances are respectively used as regenerant, efficient desorption and regeneration of the macroporous adsorption resin containing impurities such as chlorophenol are realized, and the method is simple, low in cost and capable of meeting environmental protection requirements.

A method for removing phenol from phenol-containing wastewater by adsorption coupled with biodegradation is disclosed. Porous gel beads (BC@PVA / PA) prepared from polyvinyl alcohol (PVA), phytic acid (PA), and biochar (BC) are added to an SBR bioreactor. BC@PVA / PA, which possesses phenol adsorption capabilities, can enhance the removal of phenol from wastewater through adsorption coupled with microbial degradation. A comparison of the purification effects of different treatments on phenol-containing wastewater—including inactivated sludge adsorption, BC@PVA / PA adsorption, activated sludge degradation, and BC@PVA / PA adsorption coupled with activated sludge degradation—reveals that BC@PVA / PA can rapidly adsorb phenol, alleviating the toxic inhibitory effect of high-concentration phenol on activated sludge. The adsorbed phenol can then be further desorbed and gradually removed by microbial degradation.

This invention discloses an iron-nitrogen co-doped carbon material for the adsorption and catalytic degradation of phenol, its preparation method, and its applications. The preparation method includes the following steps: using grapefruit peel as raw material, the material undergoes oxidation, pre-amidation, metal-organic framework loading, inert atmosphere calcination, and activation to obtain the iron-nitrogen co-doped carbon material. This method is economical and environmentally friendly. The prepared material has a hierarchical pore structure and a nitrogen-rich structure, with a specific surface area of ​​365.35 m² / g. The pore size matches the phenol molecule, resulting in rapid mass transfer. The iron-nitrogen co-doped carbon material can achieve a saturated adsorption capacity of 186.6 mg / g for phenol and can catalytically degrade phenol through its stable Fe-N active sites, realizing integrated "adsorption-degradation" and avoiding secondary treatment. The material has a stable structure, is resistant to acids and alkalis, and maintains a high adsorption capacity even after multiple cycles, making it suitable for the efficient treatment of phenol-containing wastewater.