Does micro/nano biochar always good to phytoremediation? A case study from multiple metals contaminated acidic soil using Salix jiangsuensis '172'

被引：1

作者：

Xiao J. ^{[1
]}

Li X. ^{[1
]}

Cao Y. ^{[1
]}

Chen G. ^{[1
]}

机构：

[1] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang district, Zhejiang, Hangzhou

来源：

Carbon Research | 2023年 / 2卷 / 01期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Acidic clay soils; Biochar; Heavy metal; Organic amendment; Willow;

D O I：

10.1007/s44246-023-00053-5

中图分类号：

学科分类号：

摘要：

Biochar amendments have shown great superiority in reduction of heavy metals (HM) toxicity and soil amelioration in severely contaminated mining areas, which suggested to facilitate vegetation rehabilitation using fast-growing trees. Bone biochar (BC) and ball-milled bone biochar (MBC) were fabricated by pyrolyzing bone meal at 600°C followed by eco-friendly wet-milling techniques. The effect of BC and MBC application (0, 0.5, 1.0, 2.0 and 4.0 wt%) on soil properties, plant growth and metal accumulation of Salix jiangsuensis '172' (SJ-172) in multi-metal (Cu, Pb, Cd and Mn)-contaminated acid clay soil was investigated in a 150-day pot experiment. The results showed that BC and MBC considerably improved the survival rate of SJ-172 when the application rate was larger than 1.0%. MBC displayed outstanding performance in reducing HMs bioavailability and improving N and P soil fertility, while BC enhanced the reduction in acidity and increase in K supply. Interestingly, BC enhanced HMs accumulation (Cd 115.23%, Pb 161.82%, Mn 285.23% and 219.29% Cu at 4% application rate) by SJ-172 compared with MBC. Taken together, the good performance of BC in enhancing HMs accumulation in SJ-172 indicated that it is a promising amendment for phytoremediation of clay soils, while MBC can be utilized as an excellent amendment for HMs stabilization. Graphical Abstract: [Figure not available: see fulltext.] © 2023, The Author(s).

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