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XRD patterns (a) and FT-IR spectra (b) of CaOx crystals induced by TPSs with different molecular weights. (A) Blank. (B) TPS0. (C)TPS1. (D) TPS2. (E) TPS3. c(Ca2+) = c(Ox2−) = 10 mmol/L; c(TPS): 0.1 g/L; crystallization time: 2 h; ∗ represents the main diffraction peaks of COD. The absence of ∗ represents the main diffraction peaks of COM.
