Work

Adsorption of Pb in Water by Fe/ MnOx ‐Loaded Attapulgite‐Hydrochar Composites: Efficacy and Mechanism

Year: 2025

Type: article

Abstract: ABSTRACT In order to develop an effective method to remove Pb(II) from water, researchers created a novel composite material (FMHCA) using hydrochloric acid‐activated attapulgite (HATP) and hydrochar (HC) loaded with Fe/Mn oxides. The adsorption capacities of three adsorbents were comparatively analyzed: HATP, an attapulgite‐hydrochar composite (HCA), and a Fe/Mn‐modified HCA (FMHCA). The microstructure, elemental composition, and pore characteristics were determined by SEM–EDX, XPS, XRD, FTIR, and BET analyses. The beneficial functional groups, including Fe‐Mn oxides, hydroxyl, and carboxyl groups, present in the adsorbent were highly conducive to Pb(II) removal. The adsorption test demonstrated that the ratio of HATP to HC in the preparation of FMHCA material at a ratio of 1:3 was optimal, and FMHCA had a higher adsorption capacity for Pb(II) (Qm = 320.85 mg/g) than both HATP and HCA. The adsorption of Pb(II) by FMHCA followed a pseudo‐second‐order model, with the isothermal adsorption model exhibiting a strong correlation with the Langmuir model. This suggests that the adsorption process is monolayer chemisorption. The findings of this study offer technical support for the cost‐effective and efficient removal of heavy metals from water.

Source: Journal of Applied Polymer Science

DOI: 10.1002/app.57304

Authors: Junwei Ge, Mengyu Wang, Tian Sun, Liangfei Dong, Huidong Liu

Institution: Changzhou University

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: bronze

Funder: Jiangsu Provincial Department of Education