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(a) Variation of ion contents in leachate against elapsed time and (b) variation of removal efficiency of Pb2+ against elapsed time against different dry densities
Figures of the Article
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Grain-size distribution curve of loess
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Adsorption curves of loess, biochar and biochar-amended loess
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(a) Variation of ion contents in leachate against elapsed time and (b) variation of removal efficiency of Pb2+ against elapsed time against different dry densities
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(a) Variation of ion contents in leachate against elapsed time and (b) variation of removal efficiency of Pb2+ against elapsed time against different dry densities
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XRD test results before and after seepage tests
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FTIR test results before and after seepage tests
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XRF test results before and after seepage tests
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Electron microscopic energy spectra of loess and biochar-amended loess before and after adsorption
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Schematical illustration of interaction between biochar and Pb2+
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Chemical mechanism in adsorption of Pb2+ by biochar-amended loess
Tables of the Article
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Initial physicochemical properties of loess
物性参数 数值 元素 相对含量/% 砂粒/% 3.3 Si 25.45 粉粒/% 87.4 Ca 11.82 黏粒/% 9.3 Mg 1.59 孔隙比 0.898 Na 0.87 天然含水率/% 16.5 K 2.69 相对质量密度Gs 2.69 Fe 4.99 液限${w_{\text{L}}}$/% 31.6 Al 7.00 塑性指数PI/% 12.1 pH值 8.30 比表面积/(m2·g-1) 24.1 土壤分类 CL -
Physicochemical properties of biochar
生物炭 热解温度/% 灰分 有机质/(g·kg-1) pH 比表面积/(m2·g-1) 木质 500 9.45 680.52 9.0 63.8 -
Adsorption capacities of Pb2+ by loess and biochar- amended loess
材料 拟合参数 Q/(mg∙g-1) b/(L∙mg-1) R2 黄土 254.81 0.060 0.979 生物炭 334.66 0.030 0.980 生物炭改良黄土 299.86 0.046 0.986
