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Insights into influence of aging processes on zero-valent iron modified biochar in copper(II) immobilization: from batch solution to pilot-scale investigation

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Frontiers of Chemical Science and Engineering 2023年第7期17卷 880-892页

作者： Huabin Wang Dingxiang Chen Yi Wen Ting Cui Ying Liu Yong Zhang Rui Xu School of Energy and Environment Science Yunnan Normal UniversityKunming 650500China Yunnan Key Laboratory of Rural Energy Engineering Kunming 650500China

The zero-valent iron modified biochar materials are widely employed for heavy metals ***,these materials would be inevitably aged by natural forces after entering into the environment,while there are seldom studies reported the aging effects of zero-valent iron modified *** this work,the hydrogen peroxide and hydrochloric acid solution were applied to simulate aging conditions of zero-valent iron modified *** to the results,the adsorption capacity of copper(II)contaminants on biochar,zero-valent iron modified biochar-1,and zero-valent iron modified biochar-2 after aging was decreased by 15.36%,22.65%and 23.26%,*** surface interactions were assigned with chemisorption occurred on multi-molecular layers,which were proved by the pseudo-second-order and Langmuir *** aging,the decreasing of capacity could be mainly attributed to the inhibition of ion-exchange and zero-valent iron ***,the plant growth and soil leaching experiments also proved the effects of aging treatment,the zero-valent iron modified biochar reduced the inhibition of copper(II)bioavailability and increased the mobility of copper(II)after *** these results bridged the gaps between bio-adsorbents customization and their environmental behaviors during practical agro-industrial application.

关键词： zero-valent iron modified biochar aging processes copper removal adsorption pilot-scale experiments

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