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

作　　者：Huabin Wang Dingxiang Chen Yi Wen Ting Cui Ying Liu Yong Zhang Rui Xu 

机构地区：[1]School of Energy and Environment Science,Yunnan Normal University,Kunming 650500,China [2]Yunnan Key Laboratory of Rural Energy Engineering,Kunming 650500,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第7期880-892,共13页化学科学与工程前沿（英文版）

基　　金：The authors appreciate the support from the National Natural Science Foundation of China(Grant No.22264025);the Yunnan Province Education Department Scientific Research Foundation Project(Grant No.2022J0136);the Applied Basic Research Foundation of Yunnan Province(Grant Nos.202201AS070020,202201AU070061).

摘　　要：The zero-valent iron modified biochar materials are widely employed for heavy metals immobilization.However,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 biochar.In this work,the hydrogen peroxide and hydrochloric acid solution were applied to simulate aging conditions of zero-valent iron modified biochar.According 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%,respectively.The surface interactions were assigned with chemisorption occurred on multi-molecular layers,which were proved by the pseudo-second-order and Langmuir models.After aging,the decreasing of capacity could be mainly attributed to the inhibition of ion-exchange and zero-valent iron oxidation.Moreover,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 aging.All 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 

分 类 号：TQ424[化学工程]