Preparation method of biodegradable oil absorption plate capable of slowly releasing nitrogen element

Abstract

The invention discloses a preparation method of a biodegradable oil absorption plate capable of slowly releasing nitrogen element. The method comprises the following steps of measuring urea and formaldehyde aqueous solutions in a ratio of 6.5 to 1, and regulating the pH value of the urea aqueous solution to be between 7.2 and 7.4; adding formaldehyde into the urea aqueous solution, stirring for 90 to 100 minutes, regulating the pH value to be between 3.2 and 3.4, and adding deionized water to obtain mixed solution M1; mixing 9.5 percent by mass of poly-beta-polyhydroxybutyrate and polyethyleneglycol chloroform solutions in a ratio of 5 to 1; dropwise adding the M1 into the chloroform mixed solution in a ratio of 1 to 4; injecting the distilled water into a container filled with liquid nitrogen, quickly freezing to manufacture spherical ice ball particles, screening and compacting in the cavity of a die; pouring the mixed solution into the die for chilling, demolding and lyophilizing in vacuum to obtain the biodegradable oil absorption plate capable of slowly releasing nitrogen element. The preparation method is simple in manufacture process, and the prepared porous plate is high in petroleum hydrocarbon pollutant processing efficiency, and cannot cause secondary pollution or destruction to the water ecological environment.

Description

technical field [0001] The invention belongs to the technical field of treatment of oil-spill-polluted water bodies, and in particular relates to a preparation method of a biodegradable oil-absorbing board capable of slowly releasing nitrogen. Background technique [0002] In recent years, with the increasing demand for oil and its products in various countries around the world, oil spill accidents have occurred frequently in the process of offshore mining, loading and unloading, transportation and utilization of oil, which not only caused a large amount of crude oil loss, but also caused serious pollution to the environment. It is increasingly threatening the ecological environment of water bodies and land areas, and has long-term harm to water body environment, natural resources and aquaculture resources. Therefore, oil spill pollution in water bodies has become a major environmental problem that people must face. [0003] At present, there are mainly physical methods, che...

AI Technical Summary

Problems solved by technology

However, the cycle of bioremediation technology is relatively long, and the physical adsorption method faces the problem of reprocessing the adsorption material after adsorption saturation. If a biodegradable adsorption material can be prepared, it can pass through the microorganisms in the polluted water after the adsorption saturation. It can degrade the petroleum hydrocarbons adsorbed by the adsorbent material, and the biodegradable adsorbent material itself can also be completely degraded, which will have greater advantages in dealing with oil spill pollution in water bodies

However, in the process of microbial degradation of petroleum hydrocarbons and the adsorption material itself, the participation of nitrogen nutrients is required. Usually, the nitrogen contained in oil-spilled water cannot meet the needs of microorganisms. Therefore, it is necessary to develop a nitrogen-nutrient Adsorption materials with element slow release function, but there is still a lack of technology and research reports in this area