Work

Polyethyleneimine-Modified Garden Waste Biochar: Preparation and Its Application for Aqueous Cr(Ⅵ) Adsorption

Year: 2025

Type: article

Abstract: Garden Waste (GW) and Polyethyleneimine were used as source materials to create polyethyleneimine-modified garden waste biochar (PGWBC). The composite was employed as an adsorbent in both static and dynamic Cr(VI) adsorption experiments after being evaluated using N2 adsorption-desorption and Fourier transform infrared spectroscopy. The material characterization results indicated that PGWBC was a mesoporous material that contained mainly narrow slit mesopores. The static adsorption data indicated that Cr(VI) adsorption by PGWBC was a pH-dependent process, a rise in pH from 2 to 9 resulting in a decrease in Cr(VI) adsorption from 44.6 mg/g to 3.8 mg/g. The adsorption process was endothermic and spontaneous, as characterized by the pseudo-second-order model and the Langmuir equation, the maximum Cr(Ⅵ) uptake was 56.1 mg/g in 308 K. The dynamic adsorption revealed that increasing the flow rate impaired Cr(VI) adsorption, and the Thomas model was more suited to represent Cr(VI) adsorption by PGWBC than the Yoon-Nelson model.

Source: Polish Journal of Environmental Studies

DOI: 10.15244/pjoes/188595

Authors: Minghua Wei, Yang Shao, Xiaohan Duan, Jingxi Tie

Institutions: North China University of Water Resources and Electric Power, Henan Vocational College of Water Conservancy and Environment

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: diamond

Funder: North China University of Water Resources and Electric Power