ion exchange

Ion exchange is used to purify water by passing it through ion exchange resins (typically bead-like and spherical in shape) where ions from the water are exchanged for ions fixed to the resins; the two most common forms of ion exchange are softening and deionization (Electrodeionization would be included here and in "Membrane Treatment" and "Electric Current Treatment")

Historical investment trends and number of deals for ion exchange

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Company	Country	Status	Amount ↓
Company: Origin Energy	Country: Australia	Status: Acquired	Amount: $12,290,000,000
Company: H2 Green Steel	Country: Sweden	Status: Private	Amount: $1,606,733,000
Company: Yingfa Group	Country: China	Status: Private	Amount: $1,450,000,000
Company: Enel Group	Country: Italy	Status: Public	Amount: $1,200,000,000
Company: Sunwoda Electric Vehicle Battery	Country: China	Status: Private	Amount: $1,180,000,000
Company: Adani Green Energy	Country: India	Status: Public	Amount: $1,120,000,000
Company: IM Motors	Country: China	Status: Private	Amount: $1,100,000,000
Company: Terawatt Infrastructure	Country: United States	Status: Private	Amount: $1,000,000,000
Company: EDP Renovaveis	Country: Portugal	Status: Public	Amount: $1,000,000,000
Company: Invenergy	Country: United States	Status: Private	Amount: $1,000,000,000