Active carbon and modification method as well as application thereof in processing water containing endocrine disrupters

Abstract

The invention provides active carbon and modification method as well as application thereof in processing water containing endocrine disrupters. The active carbon is arranged in a muffle furnace silica tube; under the room temperature, hydrogen is pumped into the muffle furnace at first for 0.5 to 1.5 hours; the hydrogen flowing speed is 40 to 60ml / minute; then under the protection of the same hydrogen flow, the temperature of the muffle furnace is raised to 500-900 DEG C by the speed of 10 DEG C / minute and then the temperature is maintained for 1 to 5 hours; after the temperature is reduced to 30 DEG C, hydrogen pumping is stopped; then the air is pumped continuously for one hour by the flux of 40 to 60ml / minute; then the active carbon is taken out, and is added into a container together with muriatic acid with a volume by volume concentration of 35 percent according to a weight percentage of 10 percent for boiling and reflowing for 2 to 4 h; then de-ionized water is used for leading the sample of the active carbon to be detected without chloridion to obtain the modified active carbon. The modified active carbon prepared by the invention is used as a sorbent in the treatment process and has larger absorption capacity and renewable performance than that of raw carbon, and can realize to completely remove the endocrine disrupters under lower carbon inputting amount.

Description

(1) Technical field [0001] The present invention relates to a modified activated carbon. The present invention also relates to a method for modifying activated carbon. The present invention also relates to the application of modified activated carbon as an adsorbent in water treatment for absorbing and removing endocrine disruptors. (2) Background technology [0002] In recent years, due to the serious deterioration of water quality, a large number of toxic and harmful pollutants have been continuously detected in water: persistent organic pollutants (POPs), disinfection by-products (DBPs), three-cause substances, endocrine disruptors (EDs), etc., Among the many organic pollutants, endocrine disruptors have been proposed as an independent environmental problem due to their different hazards. Systematic studies have shown that such pollutants will produce biomagnification effects in the process of water recycling. Conventional water treatment The processing capacity of the pr...

AI Technical Summary

Problems solved by technology

[0002] In recent years, due to the serious deterioration of water quality, a large number of toxic and harmful pollutants have been continuously detected in the water: persistent organic pollutants (POPs), disinfection by-products (DBPs), triple pollutants, endocrine disruptors (EDs), etc., Among the many organic pollutants, endocrine disruptors have been proposed as an independent environmental problem due to their different hazards. Systematic studies have shown that such pollutants will produce biomagnification effects in the process of water recycling. Conventional water treatment The processing capacity of the process is very limited, and it is difficult to meet the national drinking water standards

On the other hand, with the development of industrial production, the discharge of sewage and wastewater containing a large amount of endocrine disruptors has increased year by year, and the types have increased year by year. The discharge into water bodies without proper treatment has caused more serious pollution. Wastewater must also be treated

At present, more research is carried out on the use of advanced oxidation technology to treat polluted raw water. However, certain harmful by-products (such as bromate substances) will be produced during the treatment process. In addition, the technical cost is high and the existing water treatment process is difficult to transform. However, it has not been widely used; activated carbon adsorption to remove organic / inorganic pollutants in the water environment has been considered to be the most effective and commonly used treatment method, and has been widely used in the field of water treatment at home and abroad. Serious pollution of water bodies has been studied at home and abroad. Li Ruoyu et al. [1] Preliminary study of the adsorption characteristics and kinetics of BPA on granular activated carbon; Fukuhara et al. [2] The adsorption properties of estrone and 17β-estradiol on different commercial activated carbons were investigated; Tsai et al. [3] compared the adsorption behavior of bisphenol A on mineral materials and activated carbon; Yoon et al. [4] Adsorption and removal of bisphenol A, 17β-estradiol and 17α-ethynylestradiol in water by powdered activated carbon; Nakanishi et al. [5] The removal effect of carbonized wood chips on bisphenol A was investigated; Bautista-Toledo et al. [6] The effects of physicochemical characteristics and solution chemical properties of activated carbon on the adsorption of bisphenol A were studied

Since most current reports use the original activated carbon materials or other adsorption materials to directly adsorb endocrine disruptors contained in water, it is difficult to maximize the adsorption efficiency of activated carbon, and it is impossible to understand the effect of activated carbon on adsorbing pollutants. In terms of regeneration and service life, it is necessary to change the physical and chemical properties of the carbon itself in a certain way to improve the adsorption efficiency of activated carbon for organic pollutants.