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   _____    _____     ______     ___      _  _   
  / ___//  |  ___||  /_   _//   / _ \\   | \| || 
  \___ \\  | ||__      | ||    / //\ \\  |  ' || 
  /    //  | ||__     _| ||   |  ___  || | .  || 
 /____//   |_____||  /__//    |_||  |_|| |_|\_|| 
`-----`    `-----`   `--`     `-`   `-`  `-` -`

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Text this: Simultaneous adsorption of copper ions and humic acid onto an activated carbon