發送短信 : Removal of arsenic from aqueous solution by adsorption on leonardite

 _    _    __   __   _    _    __   __            
| || | ||  \ \\/ // | || | ||  \ \\/ //     ___   
| || | ||   \ ` //  | || | ||   \ ` //     /   || 
| \\_/ ||    | ||   | \\_/ ||    | ||     | [] || 
 \____//     |_||    \____//     |_||      \__ || 
  `---`      `-`'     `---`      `-`'       -|_|| 
                                             `-`