Method for preparing absorbent with phosphor concentration and phosphor reclaim function

Abstract

Disclosed a method for preparing the adsorbent with the phosphor collection and recycle functions, utilizes the natural mineral as raw material to mix the calcium material in 100 weight and the silicon material in 80-200 weight uniformly, then adds the water and synthetic adjuvant as natrium hydrate or calcium hydrate solution to be laid for activation, puts it into water heat reaction kettle to for heated and pressurized synthesis while the synthesis temperature is 120-280 Deg. C and the synthesis pressure is 10-40mpa and the synthesis time is 3-24 times; then cools and dries the material after aforementioned process to be milled or processed into grains which is said high effective absorbent with the phosphor collection and recycle functions. Wherein, said calcium material can be selected from lime hydrate, burnt lime and conch; said silicon material can be selected from silica dioxide, sodium silicate, ganister, bermehl and rice husk ash, which have wide resource and lower cost. The prepared absorbent has the characters that large process handling capacity of unit weight phosphor, lower producing cost, and realization of absorbing and recycling phosphor.

Description

technical field [0001] The present invention relates to a preparation method of an adsorbent with functions of phosphorus enrichment and phosphorus recovery, in particular to a kind of adsorbent with functions of phosphorus enrichment and phosphorus recovery synthesized by hydrothermal reaction using quicklime, silica and other inorganic substances as raw materials. The invention discloses a preparation method of a high-efficiency adsorbent, which belongs to the technical field of water treatment. Background technique [0002] In recent years, the eutrophication of lakes and rivers caused by excessive nutrients such as nitrogen and phosphorus in water bodies has become a major environmental problem facing our country. Scientific research shows that when the total phosphorus content in slow-flowing water bodies such as lakes and reservoirs exceeds 0.02 mg / L, blue-green algae blooms may break out, resulting in a decrease in dissolved oxygen in the water body, black and odorous...

AI Technical Summary

Problems solved by technology

Activated alumina is currently the most reported phosphorus adsorption material. The adsorption capacity of this material for phosphorus is only 10 grams of phosphorus per kilogram of adsorbent, that is, the phosphorus content in the product is about 1%, which cannot meet the standard of phosphate fertilizer.

Other phosphorus adsorption materials such as the hydrated lanthanum oxide reported in the document "Experimental Research on Hydrated Lanthanum Oxide Adsorption and Phosphorus Removal" (Environmental Science. 2003.24 (5). 111-113) and the iron-rare earth element composite water treatment reported in Chinese patent CN1094070C Adsorbents, etc., although the phosphorus adsorption capacity can reach up to 140mg / g, that is, 140 grams of phosphorus per kilogram of adsorbent, but because the raw materials used are rare precious metal elements, they are at an obvious disadvantage in terms of production costs, and whether they are harmful to the human body There are no clear conclusive reports