O/N/P-doped biochar induced to enhance adsorption of sulfonamide with coexisting Cu2+/Cr (VI) by air pre-oxidation

被引：49
作者：
Tang, Wei [1 ,2 ]
Zanli, Bi Lepohi Guy Laurent [1 ,2 ]
Chen, Jiawei [1 ,2 ]
机构：
[1] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
[2] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 341卷
基金：
中国国家自然科学基金;
关键词：
Adsorption; O/N/P-doped biochar; Sulfonamide; Coexisting heavy metal; Air pre-oxidation; HEAVY-METALS; CARBON; PHARMACEUTICALS; ANTIBIOTICS; MECHANISM; INSIGHT;
D O I：
10.1016/j.biortech.2021.125794
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The aim of this work to study the effectiveness of newly synthesized O/N/P-doped biochar for the removal of antibiotics with coexisting heavy metals. This study developed a low-dose additive agent with air pre-oxidation (APO) to obtain O/N/P-doped biochar (ONPBC) at 650/350 degrees C pyrolysis temperature with adsorption amount of 76.99 mg.g(-1) (ONPBC650) and 62.33 mg.g(-1) (ONPBC350) for sulfapyridine (SPY), comparing to pristine bio-char 9.25 mg.g(-1) (BC650) and 11.60 mg.g(-1) (BC350), indicating the adsorption capacity of biochar has been greatly improved after modification. The main sorption mechanisms were elucidated for ONPBC650 (surface physical sorption) and ONPBC350 (H-bonding). The coexisting Cu2+/Cr (VI) showed different inhibition effects on the adsorption of SPY by ONPBC650/350. Considering a trade-off between high adsorption capacity and low inhibition effect of coexisting heavy metals, economic low-temperature O/N/P-doped biochar such as ONPBC350 could be a preferred adsorbent for the removal of sulfonamide or similar organic pollutants from contaminated water.
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页数：9
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