▎ 摘　　要

Cr (VI) is a highly toxic pollutant that is known to be carcinogenic and mutagenic, and it must be completely removed from waste water before disposal. A novel graphene-silicate composite (GS-Composite) adsorbent was produced from asphalt and sand. The synthesized GS-Composite was characterized using X-ray diffraction. The adsorption of Cr (VI) ions from aqueous solution was investigated using a batch adsorption technique under various experimental circumstances. Nano-zeolite (NZ) was used as comparative adsorbent and added with various ratio to GS-Composite. The surface charge of both sorbents was determined via DLS measurements. The results declare that GS-composite is strong adsorbent for chromium "III" from aqueous media. The specific surface area of the GS-Composite and NZ was determined to be 88.20 m(2)/g and 50.46 m(2)/g, respectively. At pH 1.5, GS-composite was found to be a powerful reducing agent to Cr (VI). The maximum adsorption capacity of GS-Composite for Cr (III) was determined to be 50.00 mg/g, with an R-2 value of 0.9959, and the equilibrium sorption data were adequately matched to the Langmuir adsorption model. The findings of this investigation showed that GS-Composite is a powerful and cost-effective as a reducing-adsorbent agent for Cr (VI) and Cr (III), respectively.