Chinese Academy of Sciences

Xia Jiang

Bo Zhang

Qing Cai

Shuhang Wang

Li Li Zhao

Junyi Chen

Wenwen Wang

Kun Wang

Cheng Yao

Zhihao Wu

Yunyan Guo

Feifei Che

An equipment for in-situ restoration of sediment, including an amphibious platform and following devices provided on the amphibious platform: a screw suction device, one end of which is hinged to one end of the amphibious platform, and the other end can extend into the sediment for sucking up the sediment; a dehydration device that is provided downstream of the screw suction device and communicates with one end of the screw suction device; a sediment treatment device that is provided downstream of the dehydration device for treating the sediment and processing it into a planting base; a grass blanket processing device that is provided downstream of the sediment treatment device for planting submerged plants on the planting base to form a submerged grass blanket; a grass blanket paving device, one end of which is close to the grass blanket processing device, and the other end extends toward the screw suction device and into the water; a drainage pipe that respectively communicates with the dehydration device and the sediment treatment device; and a hopper through which the sediment is conveyed between the dehydration device and the sediment treatment device. In the invention, the highly polluted sediment is subjected to bio-safety disposal to form a planting base for the growth of submerged vegetation, so as to realize the in-situ restoration of the sediment of rivers and lakes.

Equipment for in-situ restoration of sediment

A diffusive gradients in thin films (DGT) test device for lake water, including: a floating ball and a plurality of water sampling units. A DGT detection device, a water quality detection device with a multi-parameter probe, and a water sampling device are disposed in each of the water sampling units. The water sampling device includes: a plurality of sampling bottles, each of the sampling bottles is provided with an inlet pipe and an exhaust pipe, each of the inlet pipes and exhaust pipes is provided with a one-way solenoid valve; a peristaltic pump, a water sample outlet of the peristaltic pump communicates with the inlet pipes of the plurality of sampling bottles via a multi-way connector; the exhaust pipes of the plurality of sampling bottles are connected to an exhaust manifold via a multi-way connector; a control device connected with the peristaltic pump and each of the one-way solenoid valves.

Diffusive gradients in thin films (DGT) test device for lake water and test method using same

The present disclosure provides a diffusive gradients in thin films (DGT) probe test device for a sediment core in a lake, including: a sampling tube, where, a settlement limit device is disposed on an outer wall of the sampling tube and a DGT probe and a multi-parameter water-quality detection electrode are installed within the sampling tube; a movable mudguard device comprising a connecting rod and a mudguard, where, the connecting rod rotates around a rotating shaft to drive the mudguard to move from a position where an opening at the lower end of the sampling tube is sealed to a side of the sampling tube; a position-limit mechanism removably installed outside the sampling tube; a hammering device located above the sampling tube and fixedly connected to the sampling tube; and a floating ball located above the hammering device and connected to the hammering device via a first pull rope.

Diffusive gradients in thin films (DGT) probe test device for sediment core in lake and test method using the same

The invention relates to the technical field of test equipment, in particular to a test device for simulating pollutant migration and transformation in icing and melting processes of a water body. The device comprises: a transparent cylinder body with the top open and the bottom closed, used for holding a test water body; a transparent box body, wherein the top of the box body is provided with a through hole through which the cylinder body is provided in the box body; a first refrigerating system including a first evaporator provided in the cylinder body close to an opening of the cylinder body, wherein the first refrigerating system is used for controlling the temperature of a first space from a surface of a test water body in the cylinder body to the opening of the cylinder body through the first evaporator; and a second refrigerating system used for controlling the temperature in the box body. According to the test device provided by the embodiment of the invention, the icing and melting processes of a test water body can be simulated, so that researchers do not need to extract a water sample on site, but can easily know the influence of the icing and melting processes on the migration and transformation of pollutants.

Test device for simulating pollutant migration and transformation in icing and melting processes of water body

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Beijing, China

Xia Jiang