Porous Carbons Derived from Desiliconized Rice Husk Char and Their Applications as an Adsorbent in Multivalent Ions Recycling for Spent Battery

Recycling of spent lithium-ion batteries (LIBs) has attracted increasing attentions recently on account continuous growth demand for corresponding critical metals/materials and environmental requirement solid waste disposal. In this work, rice husk as one the most abundant renewable fuel materials in world was used to prepare char (RC) applied recycle multivalent ions water from hydrometallurgical technology dispose LIBs. Rice with specific surface area pores obtained via pickling desilication process (DPRC). The structural characterization its adsorption capacity recycled were studied. XRD, TEM, SEM, Raman, BET raw modified samples. results show chars after more flourishing pore structure larger size about 50–60 nm. Meanwhile, desilication, particle decreased 31.392 ?m, is 402.10 m2/g. Its nitrogen desorption curve (BET) conforms type IV isotherm H3 hysteresis ring, indicating that prepared a mesoporous material. And optimized DPRC Ni, Co, Mn 7.00 mg/g, 4.84 2.67 respectively. It also demonstrated good fit Freundlich model DPRC-600°C, possible mechanism proposed. study indicates biochar have great potential an adsorbent recover batteries.