Effect of biochars on adsorption of Cu(II), Pb(II) and Cd(II) by three variable charge soils from southern China.
作者： Ren-kou Xu , An-zhen Zhao
DOI: 10.1007/S11356-013-1769-8
关键词: Adsorption 、 Cadmium 、 Agronomy 、 Desorption 、 Pyrolysis 、 Soil classification 、 Nuclear chemistry 、 Copper 、 Straw 、 Char 、 Chemistry
摘要: The purpose of this study is to compare the relative contribution different mechanisms enhanced adsorption Cu(II), Pb(II) and Cd(II) by variable charge soils due incorporation biochars derived from crop straws. were prepared straws canola peanut using an oxygen-limited pyrolysis method at 350 °C. effect on desorption three southern China was investigated with batch experiments. Based pre-adsorbed heavy metals, electrostatic non-electrostatic adsorptions separated. EDTA used replace metals complexed evaluate complexing ability metals. increased soil; straw char induced a greater increase in percentage much than that for Cu(II) Pb(II). two mainly through mechanism, while both contributed biochars. Peanut had specific capacity thus more did char. stronger Cd(II). Biochars metal mechanisms, varied
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