N, S Co-Doped Carbons Derived from by a Molten Salt Approach: Antibiotics Removal Performance and Techno-Economic Analysis

Overview

Journal Nanomaterials (Basel)

Date 2022 Dec 11

PMID 36500911

Authors

Mengmeng Zhang

Kexin Huang

Yi Ding

Xinyu Wang

Yingli Gao

Pengfei Li

Yi Zhou

Zheng Guo

Yi Zhang

Dapeng Wu

Affiliations

Soon will be listed here.

Abstract

N, S co-doped bio-carbons with a hierarchical porous structure and high surface area were prepared using a molten salt method and by adopting (EP) as a precursor. The structure and composition of the bio-carbons could be manipulated by the salt types adopted in the molten salt assisted pyrolysis. When the carbons were used as an activating agent for peroxydisulfate (PDS) in SMX degradation in the advanced oxidation process (AOP), the removal performance in the case of KCl derived bio-carbon (EPB-K) was significantly enhanced compared with that derived from NaCl (EPB-Na). In addition, the optimized EPB-K also demonstrated a high removal rate of 99.6% in the system that used local running water in the background, which proved its excellent application potential in real water treatment. The degradation mechanism study indicated that the N, S doping sites could enhance the surface affinity with the PDS, which could then facilitate O generation and the oxidation of the SMX. Moreover, a detailed techno-economic assessment suggested that the price of the salt reaction medium was of great significance as it influenced the cost of the bio-carbons. In addition, although the cost of EPB-K was higher (USD 2.34 kg) compared with that of EPB-Na (USD 1.72 kg), it was still economically competitive with the commercial active carbons for AOP water treatment.

Citing Articles

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