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Stereoscopic porous carbons have shown good potential in humic add (HA) removal.In this work,a novel stereoscopic porous activated carbon (SPAC) was designed and synthesized via the self-assembly of a hydrogel based on food waste during in-situ polymerization,vacuum drying,carbonization,and activation.Then,the SPAC was functionalized with 3-aminopropyltriethoxysilane (APTES) and the adsorption behavior of the modified SPAC (SPAC-NH2) was studied systematically.The effects ofpH,contact time,initial concentration of HA,and adsorbent dose were investigated,showing that optimal HA removal efficiency (＞98.0％) could be achieved at an initial HA concentration of 100 mg/L.The experimental adsorption isotherm data was fitted to the Langmuir model with a maximum adsorption capacity of 156.0 mg HA/g SPAC-NH2.Analysis of the mechanism indicated that the removal of HA was mainly realized through the amidization reaction between the-COOH groups of HA and the-NH2 groups of APTES.All of the above results showed that SPAC-NH2 powder is an efficient,eco-friendly,and reusable adsorbent which is suitable for the removal of HA from wastewater.