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The photographs of (a) an EP invaded seashore at Tsingtao City, Shandong Province of China, and (b) the fresh EP biomass. The SEM images of (c) fresh EP, (d,e) EBC-K, and (f) EBC-Na. The TEM images with (g) low and (h) high magnification of EBC-K; the inset is the SAED image. (i) HAADF-STEM image and EDS element distribution of EBC-K (red: carbon, green: oxygen, yellow: nitrogen, magenta: sulfur and blue: potassium).
