Abstract: An electrodialysis device and method for selective removal of drinking water target ions were provided. It belongs to the technical field of drinking water safety. A method of electrodialysis with slightly brackish water is proposed. By means of ion electromigration control, the resistance is converted from the single membrane resistance to the diffusion boundary layer resistance; and the diffusion boundary layer is fully compressed by controlling the electrodialysis membrane, the electrodialysis membrane stack, and the electrodialysis process parameters. So that the relative electromigration rate of the target ions is improved. According to the method, the initial concentration effect, the competition effect, the synergistic effect, the concentration diffusion, the differential pressure permeation, and other influences of electrodialysis are integrated for selectively removing the target ions.

Abstract: The present invention proposes a composite material which can rapidly and effectively remove algae and transform them into submerged macrophytes. The composite material is a mixture of two functional materials: one can grow into submerged macrophytes, and the other is clays or modified local soil particles which can flocculate algae, inhibit phosphorus release from sediments and act as the carrier of the above-mentioned seeds, earthnuts, buds, and roots of submerged macrophytes. In addition, the present invention proposes a physical-chemical-ecological combined method for improving water quality and enhancing the ecological restoration of eutrophic lakes using the above-mentioned material. By spraying the composite material to the lake surface, the new method can remove algae and turbidity through flocculation and complete the planting process simultaneously so that HABs and eutrophication are effectively controlled.

Abstract: The present invention proposes a composite material which can rapidly and effectively remove algae and transform them into submerged macrophytes. The composite material is a mixture of two functional materials: one can grow into submerged macrophytes, and the other is clays or modified local soil particles which can flocculate algae, inhibit phosphorus release from sediments and act as the carrier of the above-mentioned seeds, earthnuts, buds, and roots of submerged macrophytes. In addition, the present invention proposes a physical-chemical-ecological combined method for improving water quality and enhancing the ecological restoration of eutrophic lakes using the above-mentioned material. By spraying the composite material to the lake surface, the new method can remove algae and turbidity through flocculation and complete the planting process simultaneously so that HABs and eutrophication are effectively controlled.