L-threonine (L-Thr) obtained by fermentation often contains vestigial hydrosoluble Pb(II), Fe(II), L-glutamic acid (L-Glu) etc., which affect the product quality. Poly melamine and L-aspartic add (L-Asp) resin functional coconut shell activated carbon composite (PMA/AC) was prepared by a pressure relief-clipping-microwave assisted polymerization method for the simultaneous removals. The adsorption capacities of Pb(II), Fe(II) and L-Glu could reach to 82.34 mg.g(-1), 57.82 mg.g(-1) and 10258 mg.g(-1) at conditions of pH 5.0, 45 degrees C and 4 h with an initial concentration of 0.01 mol.L-1, respectively. The present PMA/AC was successfully used to the simultaneous removals of vestigial Pb(II), Fe(II) and L-Glu from the fermented crude product solution of L-Thr. Moreover, the PMA/AC was carefully characterized by FE-SEM, IR et at analysis techniques, the results show that abundant PMA particles evenly distributed at the inner and outside surface of AC with a size of (50 +/- 20) nm. (C) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.