Manganese oxide-modified biochars: Preparation, characterization, and sorption of arsenate and lead

• Published in: Bioresource technology Vol. 181; pp. 13 - 17
• Main Authors: Wang, Shengsen, Gao, Bin, Li, Yuncong, Mosa, Ahmed, Zimmerman, Andrew R., Ma, Lena Q., Harris, Willie G., Migliaccio, Kati W.
• Format: Journal Article
• Language: English
• Published: England 01.04.2015
• Subjects: Adsorption; Arsenates - isolation & purification; arsenic; biochar; birnessite; Charcoal - chemistry; feedstocks; Kinetics; lead; Lead - isolation & purification; lead arsenate; manganese; manganese chloride; Manganese Compounds - chemistry; manganese oxides; Oxides - chemistry; Pinus; Pinus - chemistry; Porosity; pyrolysis; scanning electron microscopy; sorption; Temperature; Thermogravimetry; Water Pollutants, Chemical - isolation & purification; wood; X-radiation; X-ray diffraction; X-ray photoelectron spectroscopy; Birnessite; Nanocomposite; Adsorption; Biochar; MnO

This work explored two modification methods to improve biochar's ability to sorb arsenic (As) and lead (Pb). In one, pine wood feedstock was pyrolyzed in the presence of MnCl2·4H2O (MPB) and in the other it was impregnated with birnessite via precipitation following pyrolysis (BPB). The resulti...