Polyethylenimine‐modified sugarcane bagasse cellulose as an effective adsorbent for removing Cu(II) from aqueous solution

Abstract

Polyethylenimine‐modified sugarcane bagasse cellulose (SBCMP), as a new adsorbent, was synthesized by the reaction of polyethylenimine (PEI) with sugarcane bagasse cellulose and glutaraldehyde. The adsorption of Cu(II) by SBCMP was pH‐dependent, and the higher removal efficiency of Cu(II) appeared in the range of pH 3.0–6.0. The adsorption isothermal data fitted well with the Langmuir model, and the maximum adsorption capacity of SBCMP was up to 107.5 mg/g. The adsorption kinetics was best described by the pseudo‐second‐order kinetic. The adsorption of Cu(II) by SBCMP was unfavorable at high temperatures, and thermodynamic analyses implied that the adsorption of Cu(II) by SBCMP was an exothermic reaction. Fourier transform infrared spectroscopy (FT‐IR) combined with X‐ray photoelectron spectroscopy (XPS) revealed that Cu(II) adsorption on SBCMP mainly controlled by the nitrogen atoms of NH group in PEI. The results of regeneration cycles showed that SBCMP was suitable for reuse in the adsorption of Cu(II) from aqueous solution. These experimental results suggested that SBCMP is expected to be a new biomass adsorbent with high efficiency in removing Cu(II) from wastewater.

Magnetically Modified Sugarcane Bagasse Biochar as Cadmium Removal Agent in Water

“…Figure 3(a-d) depict the morphology of raw sugarcane bagasse, sugarcane bagasse biochar, magnetic biochar before adsorption, and magnetic biochar after adsorption, respectively. Raw sugarcane bagasse has a more blocked and smooth surface [23], but the structure is more porous and agglomeration could be observed (Fig. 3d) after impregnation and pyrolysis of sugarcane bagasse.…”

Removal of Pb2+ from Wastewater By γ‐Fe2O3@SHFA Based on Alkali‐Modified Fly Ash: Performance and Mechanism

“…The Langmuir equation (Equation ( 5)) and Freundlich equations ((Equation ( 6)) were used to fit and analyze the isothermal process of Pb 2+ removal by γ-Fe 2 O 3 @SHFA [39,40]…”

Microfibrillated cellulose reinforced poly(vinyl imidazole) cryogels for continuous removal of heavy metals

“…Therefore, the US Environmental Protection Agency (EPA) and European Union Drinking Water Directive (EU DWD) set the standards of the maximum contaminant level (MCL) of heavy metals in drinking water. Among these heavy metals, copper and its alloys are the most prevalent in various industrial fields for numerous purposes 10,11 . The MCL of copper in the drinking water set by the US EPA and EU DWD is 1.3 and 2.0 mg/L, respectively 12 .…”

“…Among these heavy metals, copper and its alloys are the most prevalent in various industrial fields for numerous purposes. 10,11 The MCL of copper in the drinking water set by the US EPA and EU DWD is 1.3 and 2.0 mg/L, respectively. 12 To protect the environment and maintain human health, it is imperative to find new solutions for the cheap, efficient remediation of copper wastewater to meet the standards of clean drinking water, which is yet challenging.…”