Biomass based activated carbon obtained from sludge and sugarcane bagasse for removing lead ion from wastewater. (September 2015) - Tao, Hu-Chun
Highlights: Bagasse modified municipal sewage sludge based adsorbent. HNO3 modified adsorbent to promote its adsorb-ability of Pb 2+ . The adsorption capacity of Pb 2+ increases to more than 50 mg/g. Abstract: Sewage sludge and bagasse were used as raw materials to produce cheap and efficient adsorbent with great adsorption capacity of Pb 2+ . By pyrolysis at 800 °C for 0.5 h, the largest surface area (806.57 m 2 /g) of the adsorbent was obtained, enriched with organic functional groups. The optimal conditions for production of the adsorbent and adsorption of Pb 2+ were investigated. The results of adsorb-ability fitted the Langmuir isotherm and pseudo-second-order model well. The highest Pb 2+ (at pH = 4.0) adsorption capacity was achieved by treating with 60% (v/v) HNO3 . This is a promising approach for metal removal from wastewater, as well as recycling sewage sludge and bagasse to ease their disposal pressure.