Biomass based activated carbon obtained from sludge and sugarcane bagasse for removing lead ion from wastewater

• Published in: Bioresource technology Vol. 192; pp. 611 - 617
• Main Authors: Tao, Hu-Chun, Zhang, He-Ran, Li, Jin-Bo, Ding, Wen-Yi
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-09-2015
• Subjects: Activated carbon; Adsorption; Cellulose - chemistry; Charcoal - chemistry; Industrial Waste - prevention & control; Ions - isolation & purification; Lead - chemistry; Lead - isolation & purification; Metal removal; Saccharum - chemistry; Sewage - chemistry; Sludge; Sugarcane bagasse; Ultrafiltration - methods; Waste Water; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - isolation & purification; Water Purification - methods; Adsorption; Sludge; Activated carbon; Sugarcane bagasse; Metal removal
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2015.06.006

•Bagasse modified municipal sewage sludge based adsorbent.•HNO3 modified adsorbent to promote its adsorb-ability of Pb2+.•The adsorption capacity of Pb2+ increases to more than 50mg/g.
Sewage sludge and bagasse were used as raw materials to produce cheap and efficient adsorbent with great adsorption capacity of Pb2+. By pyrolysis at 800°C for 0.5h, the largest surface area (806.57m2/g) of the adsorbent was obtained, enriched with organic functional groups. The optimal conditions for production of the adsorbent and adsorption of Pb2+ were investigated. The results of adsorb-ability fitted the Langmuir isotherm and pseudo-second-order model well. The highest Pb2+ (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.