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A novel biosorbent modified corn silk by dilute nitric acid (HNO3-MCS) was prepared as a solid phase extractant and applied for removing of Cu2+, Co2+ and Ni2+ in water prior to their determination. Characterizations of HNO3-MCS have been explored by means of FT-IR spectra, surface charge analysis and thermogravimetric analysis (TGA). The abundant oxygen-containing functional groups on the surface...
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