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Porous carbon-encapsulated iron (Fe@PC) composite was prepared through carbothermal reduction of Fe(NO 3 ) 3 and starch. The porous carbon could envelop iron and protect it from being oxidized, while iron endow the composite with ferromagnetism, so that Fe@PC can be easily recovered by an external magnetic field. The prepared material was used to remove trace Cr(VI) in polluted water...
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