烟草生物炭及其不同固定剂对多金属污染土壤中微量元素稳定化的残留效应。
Residual effects of tobacco biochar along with different fixing agents on stabilization of trace elements in multi-metal contaminated soils.
机构信息
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shannxi 712100, China; Department of Environmental Sciences, Sindh Madressatul Islam University, Karachi, Pakistan.
Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakowal, Mickiewicza 2131-120, Krakow, Poland.
出版信息
J Environ Sci (China). 2020 Jan;87:299-309. doi: 10.1016/j.jes.2019.07.003. Epub 2019 Jul 10.
The residual effect of tobacco biochar (TB ≥ 500°C) mono and co-application with Ca-hydroxide (CH), Ca-bentonite (CB) and natural zeolite (NZ) on the bio-availability of trace elements TE(s) in alkaline soils has not been deeply studied yet. A pot study that had earlier been investigated TB mono and blended with CH, CB and NZ on the immobilization of Pb, Cu Cd, and Zn by Chinese cabbage. Maize crop in the rotation was selected as test plant to assess the residual impact of amendments on stabilization of Pb, Cu Cd, and Zn in mine polluted (M-P), smelter heavily and low polluted (S-HP and S-LP, respectively) soils. The obtained results showed that stabilization of Pb, Cd, Cu and Zn reached 63.84% with TB + CB, 61.19% with TB + CH, 83.31% with TB + CH and 35.27% with TB + CH for M-P soil, 36.46% with TB + NZ, 38.46% with TB + NZ, 19.40% with TB + CH and 62.43% with TB + CH for S-LP soil, 52.94% TB + NZ, 57.65% with TB + NZ, 52.94% with TB + NZ, and 28.44% with TB + CH for S-LP soil. Conversely, TB + CH and TB alone had mobilized Pb and Zn up to 19.29% and 34.96% in M-P soil. The mobility of Zn reached 8.38% with TB + CB and 66.03% with TB for S-HP and S-LP soils. The uptake and accumulation of Pb, Cd, Cu and Zn in shoot and root were reduced in three polluted soils. Overall, the combination of TB along with CH, CB and NZ has been proven to be effective in Pb, Cd, Cu and Zn polluted mine/smelter soils restoration.
尚未深入研究烟草生物炭（TB≥500°C）单施和与 Ca 氢氧化物（CH）、Ca 膨润土（CB）和天然沸石（NZ）共施对碱性土壤中微量元素 TE(s) 生物有效性的残留效应。一项盆栽研究曾研究过 TB 单施和与 CH、CB 和 NZ 混合对小白菜固定 Pb、Cu、Cd 和 Zn 的效果。选择玉米作物作为轮作中的测试植物，以评估改良剂对矿区污染（M-P）、冶炼厂高污染和低污染（S-HP 和 S-LP）土壤中 Pb、Cu、Cd 和 Zn 稳定化的残留影响。研究结果表明，TB+CB 使 M-P 土壤中 Pb、Cd、Cu 和 Zn 的稳定化率达到 63.84%，TB+CH 为 61.19%，TB+CH 和 TB+CH 为 83.31%，分别为 35.27%；TB+NZ 对 S-LP 土壤中 Pb、Cd、Cu 和 Zn 的稳定化率为 36.46%，TB+NZ 为 38.46%，TB+CH 为 19.40%，TB+CH 为 62.43%；TB+NZ 对 S-LP 土壤中 Pb、Cd、Cu 和 Zn 的稳定化率为 52.94%，TB+NZ 为 57.65%，TB+NZ 为 52.94%，TB+CH 为 28.44%。相反，TB+CH 和 TB 单独使 M-P 土壤中的 Pb 和 Zn 分别增加了 19.29%和 34.96%。TB+CB 和 TB 使 S-HP 和 S-LP 土壤中 Zn 的迁移率分别达到 8.38%和 66.03%。在三种污染土壤中，Pb、Cd、Cu 和 Zn 在茎叶和根系中的吸收和积累减少。总的来说，TB 与 CH、CB 和 NZ 的组合已被证明可有效修复 Pb、Cd、Cu 和 Zn 污染的矿山/冶炼厂土壤。
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