The nano-Fe(0)/mesoporous carbon supported on biochar (MCFe/BC) was synthesized by a co-assembly process followed with carbon thermal reduction method. The specific surface area of MCFe/BC was 582.0 m 2 /g. The highest removal efficiency of pyrene in sand can reach about 40% after 7 h duration on MCFe6.2/BC with 6.2 wt% of iron by the peroxydisulfate advanced oxidation process (PDS-AOP). The removal efficiency of pyrene by adsorption at pH values varied from 4 to 10 in 24 h is around 40%, which shows that adsorption is independent with the pH values, while PDS-AOP is pH dependent, which is more efficient in acidic and basic conditions. The graphitic structure and oxygen-containing groups of carbon materials are benefit for adsorption of PAH. The presence of Nano-Fe(0) is responsible for the activation of peroxydisulfate especially at acidic condition. Our results indicate the potential of PDS-AOP using zero valent iron/porous biochar composite as the activator in practical soil remediation.

中文翻译：

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纳米Fe（0）/中等碳负载在生物炭上，用于活化过二硫酸盐以去除多环芳烃

通过共组装法和碳热还原法合成了负载在生物炭上的纳米Fe（0）/中碳（MCFe / BC）。MCFe / BC的比表面积为582.0m 2 / g。通过过氧化二硫酸盐高级氧化工艺（PDS-AOP），在MCFe6.2 / BC上含6.2 wt％的铁的条件下，经过7 h的持续时间，砂中of的最高去除率可达到约40％。在24小时内，pH值从4变到10时，adsorption的吸附去除率约为40％，这表明吸附与pH值无关，而PDS-AOP依赖于pH，在酸性和碱性条件下更有效情况。碳材料的石墨结构和含氧基团有利于PAH的吸附。纳米铁（0）的存在负责过氧二硫酸盐的活化，尤其是在酸性条件下。我们的结果表明在实际土壤修复中使用零价铁/多孔生物炭复合物作为活化剂的PDS-AOP的潜力。