Method for surface modification of basalt fibre carrier for purifying water quality

Abstract

The invention discloses a method for surface modification of a basalt fibre carrier for purifying water quality. The method comprises the following steps of: firstly roughening the surface of originally smoother basalt fibre by acid etching, wherein the rough surface is beneficial to attaching and fixing the microbes on the surface; and then forming an Si-OH group on the surface of basalt fibre through an advanced oxidation reaction to evidently increase oxygen-containing groups on the surface of basalt fibre, thereby enhancing the wetting property of the surface of basalt fibre; and then depositing Fe<3+> ions on the surface of basalt fibre carrier by using a cation deposition method, wherein the potential on the surface of carrier is boosted; the surface of carrier has positive change to accelerate the fixation of the microbes on the surface of fibre by utilizing electrostatic attraction; and modifying the surface of basalt fibre carrier to enable the surface to have excellent hydrophilic property and microbe loading property and to load more biomass weights, as well as to maintain higher microbial activity for a long time, thereby more efficiently removing the pollutants in the water body through a biological membrane method.

Description

technical field

[0001] The invention relates to a method for surface modification of a basalt fiber carrier for water purification. Background technique

[0002] At present, carbon fiber materials are relatively mature in the application of fiber materials to water treatment carriers. Through the high bio-affinity of carbon fiber, an active biofilm is formed, and the function of microorganisms is used to decompose pollutants. Carbon fiber is an ideal biological carrier with good application effect. It has been widely concerned at home and abroad, and there are many successful engineering application cases. However, although carbon fiber has good performance, its price is high and its cost performance is low, so it cannot be widely accepted by the market.

[0003] The basalt fiber (BFs) used in the present invention is a green and high-performance inorganic silicate fiber, which is composed of basalt rock materials composed of oxides such as silicon dioxide, aluminum oxide,...