H_3PO_4 activation mediated the iron phase transformation and enhanced the removal of bisphenol A on iron carbide-loaded activated biochar

Zhao Nan; Liu Kunyuan; He ChaoZhao DongyeZhu LingZhao ChuanfangZhang WeihuaOh Wen-DaZhang WeixianQiu Rongliang

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H_3PO_4 activation mediated the iron phase transformation and enhanced the removal of bisphenol A on iron carbide-loaded activated biochar

机译：H_3PO_4 activation mediated the iron phase transformation and enhanced the removal of bisphenol A on iron carbide-loaded activated biochar

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Zero valent iron-loaded biochar (Fe0-BC) has shown promise for the removal of various organic pollutants, but is restricted by reduced specific surface area, low utilization efficiency and limited production of reactive oxygen species (ROS). In this study, iron carbide-loaded activated biochar (Fe3C-AB) with a high surface area was synthesized through the pyrolysis of H3PO4 activated biochar with Fe(NO3)3, tested for removing bisphenol A (BPA) and elucidated the adsorption and degradation mechanisms. As a result, H3PO4 activated biochar was beneficial for the transformation of Fe0 to Fe3C. Fe3C-AB exhibited a significantly higher removal rate and removal capacity for BPA than that of Fe0-BC within a wide pH range of 5.0-11.0, and its performance was maintained even under extremely high salinity and different water sources. Moreover, X-ray photoelectron spectra and density functional theory calculations confirmed that hydrogen bonds were formed between the COOH groups and BPA. 1O2 was the major reactive species, constituting 37.0 of the removal efficiency in the degradation of BPA by Fe3C-AB. Density functional reactivity theory showed that degradation pathway 2 of BPA was preferentially attacked by ROS. Thus, Fe3C-AB with low cost and excellent recycling performance could be an alternative candidate for the efficient removal of contaminants.

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《Environmental Pollution》 |2022年第5期|118965.1-118965.11|共11页
作者
Zhao Nan; Liu Kunyuan; He ChaoZhao DongyeZhu LingZhao ChuanfangZhang WeihuaOh Wen-DaZhang WeixianQiu Rongliang;
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作者单位

Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Peoples R China|Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Peoples R China;

Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Peoples R China;

Auburn Univ, Dept Civil & Environm Engn, Auburn, AL 36849 USATongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R ChinaChinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R ChinaUniv Sains Malaysia, Sch Chem Sci, George Town 11800, MalaysiaTongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China|Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R ChinaSun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Peoples R China|Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China|South China Agr Univ, Coll Nat Resources & Environm, Guangdong Prov Key Lab Agr & Rural Pollut Abateme, Guangz;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
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关键词
H 3 PO 4 activation; Fe 3 C-Loaded activated biochar; Hydrogen bond; Singlet oxygen degradation; Degradation pathway;

H_3PO_4 activation mediated the iron phase transformation and enhanced the removal of bisphenol A on iron carbide-loaded activated biochar

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