Preparation of Fe-SBC from Urban Sludge for Organic and Inorganic Arsenic Removal

In the process of water treatment adsorption has been proved to be the best, because of its significant advantages. It is recognized that recycling and reuse of waste can result in significant savings in materials cost. In this research, the adsorption of organic and inorganic arsenic using sludge biochar (SBC) made from urban sludge were analyzed. The sludge was carbonized using calciner carbonization and then chemically activated at high temperatures and a newly designed Fe-doped sludge biochar (Fe-SBC) presents effective As adsorption in water. Results show that the surface area and average pore volume of Fe-SBC are 498 m(2) g(-1) and 0.33 cm(3) g(-1), respectively. The adsorption capacity of p-ASA, As(V) and As(III) on Fe-SBC was calculated as 5.47, 3.83 and 3.24 mg L-1, respectively. The adsorption capacity of As were obviously decreased in presence of PO43-. After six times recycles of adsorption-desorption processes, the adsorption capacity of p-ASA, As(V) and As(III) on Fe-SBC obvious reduction.