| 黄玉芬，杜 毅，王钰静，周丽萍，Houssou Assa Albert，黄连喜，魏 岚，刘忠珍.桑树枝和肉桂枝生物炭吸附及钝化土壤镉效果比较[J].广东农业科学,2022,49(3):96-105 |
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桑树枝和肉桂枝生物炭吸附及钝化土壤镉效果比较 |
| Comparison of the Adsorption and Inactivation of Soil Cadmium by Two Biochars Derived from Mulberry and Cinnamon Branches |
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| DOI：10.16768/j.issn.1004-874X.2022.03.011 |
| 中文关键词: 桑树枝 肉桂枝 生物炭 镉 等温吸附 小白菜 |
| 英文关键词: mulberry branch cinnamon branch biochar cadmium isothermal adsorption Brassica chinensis L. |
| 基金项目:广东省烟草育种与综合利用工程技术研究中心 / 广东省农作物遗传改良重点实验室联合开放课题（202003）；广州市科技计划项目（202102080407）；广东省农业科学院“十四五”学科团队建设项目（202120TD） |
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| 中文摘要: |
| 【目的】探讨桑树枝和肉桂枝生物炭对水和土壤环境中镉（Cd）污染的修复效果，为实现木质农
林废弃物的资源化利用和 Cd 污染环境修复提供理论依据。【方法】将桑树枝和肉桂枝置于 400 ℃慢速热裂解
2 h 制备生物炭，采用等温吸附试验研究其吸附 Cd 特征，通过盆栽试验检验其钝化土壤 Cd 以及阻止小白菜吸收
富集 Cd 的作用效果。【结果】桑树枝生物炭（MB400）和肉桂枝生物炭（CB400）对 Cd 的吸附均可用 Langmuir
等温吸附模型进行拟合，最大吸附容量（Q0
）分别达到 4 305.61、442.77 mg/kg，MB400 吸附 Cd 的能力较强，这
可能与其 pH 值、灰分（Ash）、阳离子交换量（CEC）和有效磷（AP）含量较高有关。添加 MB400 可显著降低
土壤中有效态镉（AvCd）含量，但 CB400 处理没有显著效果。添 加 3% 的两种生物炭，小白菜生物量明显提高，
Cd 的生物富集因子（BCF 值）从对照的 5.95 分别降至 4.29（MB400）和 4.85（CB400）。【结论】两种生物炭
对 Cd 具有较强的吸附能力，能够钝化土壤 Cd，阻止小白菜吸收富集，且桑树枝生物炭的效果更好。 |
| 英文摘要: |
| 【Objective】The study was conducted to explore the remediation effects of biochars derived from mulberry
and cinnamon branches on cadmium(Cd) pollution in water and soil environments, with a view to providing a theoretical
basis for the resource utilization of woody agroforestry wastes and the remediation of Cd-contaminated environment.【Method】Both mulberry and cinnamon branches were slowly pyrolyzed under 400℃ for 2 h. The obtained biochars were tested
for their isothermal adsorption of Cd, and then added into the Cd contaminated soil grown with Brassica chinensis L. in a pot
experiment.【Result】Adsorption of Cd b y either mulberry biochar (MB400) or cinnamon biochar (CB400) could be fitted
by Langmuir isothermal equation, and the maximum adsorption capacities (Q0
) were 4 305.61 mg/kg and 442.77 mg/kg,
respectively. It was obvious that MB400 had much higher capacity for adsorption of Cd than that of CB400 treatment, which may
be attributed to its higher values in pH, ash and CEC and available phosphorus(AP). Furthermore, MB400 addition significantly
reduced the content of available cadmium(AvCd) while it showed little effect under CB400 treatment. The dry matter of
B. chinensis L. was remarkably enhanced by adding both biochars. The bioconcentration factor(BCF) of Cd decreased from 5.95
in the control to 4.29 (MB400) and 4.85 (CB400).【Conclusion】Both biochars had high adsorption capacity for Cd, and could
inactivate Cd availability and thereafter inhibited Cd accumulation in cabbage tissue. MB400 showed better effect than CB400. |
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