CN-117326703-B - Application of aquatic plants in removing diazepam residues in water body and method for removing diazepam residues in water

Abstract

The invention belongs to the technical field of biological treatment, and particularly relates to application of aquatic plants in removing diazepam residues in water and a method for removing the diazepam residues in water. According to the invention, the eichhornia crassipes and/or the water lettuce are applied to removing the diazepam residues in the water body, so that the removal rate of the diazepam in the water body can be effectively improved, the concentration of pollutants in the water body is gradually reduced along with the growth and absorption of plants, and the reutilization of the water body is realized.

Inventors

• WANG ZHIWEI
• CHU HAN
• WANG XINQUAN
• QI PEIPEI
• DI SHANSHAN
• ZHAO HUIYU
• LIU ZHENZHEN

Assignees

• 浙江省农业科学院

Dates

Publication Date

20260505

Application Date

20231009

Claims (1)

1. 1. The application of the aquatic plants in removing diazepam residues in the water body is characterized in that the aquatic plants are planted in the water body to be repaired; the aquatic plant is a floating plant, and comprises eichhornia crassipes and/or water lettuce; The planting time is 7-14 d; The temperature of the water body is 25 ℃, and the planting density is 1.0kg/m 2 ; the planting areas of the aquatic plants are isolated from each other by using an ecological floating bed, and the area of each planting area is 70 multiplied by 60cm; The environmental temperature of the planting is 20 ℃; the concentration of diazepam in the water body to be repaired is 0.51-0.67 mug/L; the water body to be repaired comprises a culture water body; By adopting the scheme, the water hyacinth is planted, the highest diazepam elimination rate in the water body can reach 70.55%, and the water hyacinth is planted, and the highest diazepam elimination rate in the water body can reach 60.51%.

Description

Application of aquatic plants in removing diazepam residues in water body and method for removing diazepam residues in water Technical Field The invention belongs to the technical field of biological treatment, and particularly relates to application of aquatic plants in removing diazepam residues in water and a method for removing the diazepam residues in water. Background Diazepam is detected in surface water, groundwater and aquaculture water, and in recent years, the diazepam is illegally used in aquaculture and transportation links to slow down metabolism of fishes and reduce environmental pressure of the fishes. Most of the water for aquaculture is reused for aquaculture after being filtered by a wastewater recycling technology. However, the diazepam in the recycled water cannot be effectively removed by the traditional adsorption treatment method, and the diazepam is easy to lose, difficult to separate and easy to cause secondary pollution in the adsorption-separation-recycling process. The plant restoration technology is an in-situ ecological treatment technology with low cost and no pollution, has a certain landscape value, can provide a proper growth environment for microorganisms, has a filtration effect on suspended pollutants, can avoid the problems of difficult separation and recovery of pollutant residues in water treated by the traditional adsorbent and easy secondary pollution generation, and is of great importance to control the pollution level of the medicines. CARMEN G FRANKS et al, journal "Environmental Management" published a study of A prescription for drug-FREE RIVERS: uptake of pharmaceuticals by A WIDESPREAD STREAMSIDE willow in which, in the greenhouse, willow seedlings removed 40% of diazepam from the water body within 24 hours, but wickers had limitations in the application of the wickers to diazepam repair in the water environment and were not as convenient for field planting and management as floating plants. It is reported that the effect of removing psychotropic drugs such as diazepam in sewage treatment plants in Shanghai and the like is poor, and the average removal rate is lower than 50%. Therefore, it is particularly important to find a method for removing diazepam in water with high removal rate. Disclosure of Invention The invention aims to provide an application of aquatic plants in removing diazepam residues in water, and the removal rate of pollutants in water is improved when the plants adsorb and treat the pollutant residues in water. The invention provides application of aquatic plants in removing diazepam residues in a water body, wherein the aquatic plants comprise eichhornia crassipes and/or water lettuce. The invention also provides a method for removing the diazepam residues in water, which comprises the step of planting plants in the water body to be repaired, wherein the plants comprise Eichhornia crassipes and/or Pisum sativum. Preferably, the planting areas of the plants are isolated from each other, each planting area having an area of 70 x 60cm. Preferably, the temperature of the water body is 20-30 ℃. Preferably, the planting density is 0.5-1.0 kg/m 2. Preferably, the ambient temperature of the planting is 20 ℃. Preferably, the concentration of diazepam in the water body to be repaired is 0.03-0.67 mug/L. Preferably, the body of water to be repaired comprises a body of aquaculture water. Preferably, the planting time is 7-14 d. The beneficial effects are that: According to the invention, the eichhornia crassipes and/or the water pistia is applied to removing the diazepam residues in the water body, so that the removal rate of the diazepam in the water body by the phytoremediation method can be effectively improved, and the reutilization of the water body is realized. After the plants are selected in advance, the plants are planted in the water body to be repaired, the planted areas are separated by the ecological floating bed, so that the growth of the plants can be effectively controlled, the plants can be recovered conveniently, the concentration of pollutants in the water body is gradually reduced along with the growth and absorption of the plants, and the reutilization of the water body is realized. Furthermore, the water temperature and the planting density are adjusted, so that the absorption efficiency of the eichhornia crassipes and the water lettuce on the diazepam can be effectively improved, the cultivation water is effectively purified, and the recycling of the cultivation water is realized. Drawings In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. FIG. 1 is a graph of dynamic residual concentration of diazepam in water treated with Eichhornia crassipes; Figure 2 is a dynamic residual concentration of diazepam in water treated by water of water lettuce. Detailed Description