Absorbent material for water body purification and biological carbon brick

Abstract

The invention relates to an absorbent material for water body purification and a biological carbon brick; the absorbent material disclosed by the invention is composed of biological carbon and sodium polyacrylate (PAAS); the concentration of the PAAS solution is 0.1-50g/L; 10-200 g of biological carbon is added into 500-1000 mL of PAAS solution; the biological carbon brick comprises a hollow base; an annular top cover is installed on the top end of the base; the absorbent material is filled in the base; two layers of protective filter films cover the upper surface of the absorbent material; and a diffusion film interlayer is arranged between the two layers of filter films. According to the invention, due to the added diffusion film, PAAS and biological carbon can be effectively prevented from being dissolved; pollutants having high activity and low molecular weight are allowed to freely diffuse to enter the biological carbon brick, and therefore, the absorbent material for water body purification and the biological carbon brick disclosed by the invention have the capability of selectively eliminating hazard pollutants in a water body.

Description

technical field [0001] The invention belongs to the field of environmental science and relates to an adsorption material for water body purification, in particular to an adsorption material for water body purification and a biochar brick. Background technique [0002] Biochar usually refers to the charcoal produced by the incomplete combustion of biomass under anoxic conditions based on the biomass resources widely existing in nature, using specific carbonization technology. Common biochars include charcoal, bamboo charcoal, straw, charcoal rice, shell charcoal, etc. They are mainly composed of aromatic hydrocarbons and simple carbon or carbon with graphite structure, containing more than 60% carbon elements, and also include H, O, N, S and a small amount of trace elements. Biochar has the notable characteristics of wide sources of raw materials, low production cost, ecological safety and pollution-free, and large-scale promotion. [0003] Biochar has extremely low solubil...

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Problems solved by technology

[0004] Due to its large porosity and specific surface area, biochar has great advantages in adsorbing heavy metals and organic pollutants. However, since biochar is a black fluffy solid substance with fine particles and light texture, the treated biochar Charcoal is not easy to separate from water, this shortcoming limits the application of biochar

[0005] Sodium polyacrylate is a water-soluble polymer compound that can be dissolved in water to form a viscous liquid. It has a super strong chelating ability for heavy metals in water, especially divalent metal ions. Sodium acrylate is still water-soluble and cannot be removed, which limits the application of sodium polyacrylate as a water treatment agent

[0006] Active pollutants are the most harmful in water bodies. Active pollutants such as ionic heavy metals, pesticides, and low-molecular-weight POPs will cause direct harm to organisms and the ecological environment. Elimination of active pollutants in water bodies is an urgent problem that needs to be solved. At present, the materials that can adsorb and remove highly active pollutants in water bodies have disadvantages such as low adsorption capacity, high preparation cost, difficult preparation, and difficult subsequent treatment, which are limited in use.

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