Removal of Methylene Blue from Aqueous Solution Using Black Tea Wastes: Used as Efficient Adsorbent. - Ullah, Azmat; Zahoor, Muhammad; Din, Waqar Ud; Muhammad, Mian; Khan, Farhat Ali; Sohail, Aamir; Ullah, Riaz; Ali, Essam A.; Murthy, H. C. Ananda (Adsorption Science & Technology, 2022)