生物炭
吸附
木质素
化学
降水
碱金属
离子交换
环境修复
热解
化学工程
无机化学
有机化学
污染
离子
工程类
物理
气象学
生物
生态学
作者
Fangfang Wu,Long Chen,Peng Hu,Yunxiao Wang,Jie Deng,Baobin Mi
标识
DOI:10.1016/j.biortech.2020.124539
摘要
Developing a cost-effective and high-efficiency biochar is critical in various environmental applications. Lignin-based materials are natural and abundant adsorbents to heavy metals benefited from their special polyphenol structure and physicochemical properties. In this study, adsorption capacities to Pb(II) by alkali lignin (AL) and its biochar derivative (ALB) were comparatively discussed, and the latter exhibited superior adsorption performance, with a maximum adsorption capacity almost twice that of the former, and a much faster absorption rate. The qm value of ALB was significantly superior to that of other reported biochar materials. Pb(II) was mainly adsorbed into ALB in three forms: mineral precipitation, ion exchange, and surface complexation, with complexation and mineral precipitation being the dominant mechanisms of adsorption. This study demonstrates that alkali-lignin derived biochar is a promising material for the remediation of polluted by Pb(II).
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