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

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