Preparation and application method of biological purifying agent for removing composite pollutants in sediments

Abstract

The invention discloses a preparation and application method of a biological purifying agent for removing composite pollutants in sediments, relates to a preparation and application method of a biological purifying agent, and particularly relates to a method for preparing an immobilized material of the composite pollutants, namely a purifying agent with higher adsorption performance, by taking potassium alginate, plant ash and calcium nitrate as raw materials and immobilizing fungus penicillium chrysogenum. Meanwhile, the invention further provides a method for simultaneously purifying the composite pollution sediment containing organic matter BaP and inorganic arsenic As (v). According to the method, the BaP and As (V) combined pollution sediments are subjected to comprehensive treatment at the same time, and the prepared purifying agent has advantages of no secondary pollution, large specific surface area, multiple functional groups, chemical adsorption and physical adsorption with BaP and As (V), and good arsenic fixation effect. The method is simple to operate and easy to industrialize, can provide a feasible way for large-scale production of a purifying agent, and is a promising treatment technology for waste water / sediment containing BaP and As (V).

Description

technical field [0001] The invention relates to a preparation and application method of a biological purification agent, in particular to a preparation and application method of a biological purification agent for removing complex pollutants in sediments. Background technique [0002] With the rapid development of industry and agriculture, increasing heavy metals and persistent organic pollutants are discharged into the environment without treatment or treatment is not up to standard, and a large number of pollutants eventually flow into rivers, lakes and other water bodies through precipitation and runoff. substances, resulting in continuous pollution of surface water. Heavy metals and polycyclic aromatic hydrocarbons (PAHs) are two types of typical heavy pollutants in the environment. They coexist in river surface sediments and affect the migration and transformation of pollutants through physical, chemical and microbial interactions. Benzo(a)pyrene (BaP) is a typical PAH...

AI Technical Summary

Problems solved by technology

However, the price of ion exchange resin is relatively high, the amount of input is relatively large, and the raw water needs to be pretreated before feeding, which may cause secondary pollution and other disadvantages, the scope of application is limited, and it is not suitable for large-scale sewage / sediment treatment ; Although the biological method is low in cost and does not have secondary pollution, the treatment cycle is long and microorganisms are easily affected by environmental conditions; the operation of electrochemistry involves multiple disciplines such as chemistry, physics, electricity, and surface science, and the mechanism is relatively complicated , requires special equipment, relatively large cost, and relatively high requirements for operating technology