| 何 雨 1
，罗云霞1
，樊 仙 2
，杨梓润 1
，高鹏飞 1
，王 启1
，苏小娟 1.淹水条件下羊粪生物炭对重金属复合污染土壤中 Pb、Zn 有效性影响[J].广东农业科学,2024,51(7):142-150 |
|
查看全文
HTML
淹水条件下羊粪生物炭对重金属复合污染土壤中 Pb、Zn 有效性影响 |
| Effect of Sheep Manure Biochar Application Under Flooding Condition on the Availability of Pb and Zn in Heavy Metal Contaminated Soil |
| |
| DOI：10.16768/j.issn.1004-874X.2024.07.013 |
| 中文关键词: 淹水 羊粪生物炭 钝化 重金属 生态风险 |
| 英文关键词: flooding sheep manure biochar passivation heavy metal ecological risk |
| 基金项目:云南省农业联合专项（202101BD070001-031）；云南省基础研究项目（202101AT070037）；西南林业
大学博士科研启动项目（01102/112114） |
|
| 摘要点击次数: 268 |
| 全文下载次数: 282 |
| 中文摘要: |
| 【目的】探讨淹水条件下羊粪生物炭对重金属复合污染土壤中 Pb、Zn 有效性的影响，为矿区重金属
污染农田土壤治理提供依据。【方法】以云南某铅锌矿区附近受污染的农田土壤为研究对象，通过静态培养试验，
研究淹水条件下不同添加量（0%、2.5%、5.0% 和 7.5%）羊粪生物炭对污染土壤中 pH 和 Pb、Zn 有效性的影响，
并用毒性特征淋溶方法（TCLP）对其生态环境风险进行评价。【结果】与对照相比，羊粪生物炭处理土壤 pH 值提
高 0.04~0.11 个单位，土壤有效态 Pb、Zn 质量分数显著降低 32.01%~58.09%、6.44%~9.15%，土壤 pH 与土壤有效
态 Pb、Zn 质量分数分别呈极显著负相关和显著负相关；从重金属赋存形态来看，羊粪生物炭明显促进土壤中 Pb、
Zn 钝化，其中 5.0% 羊粪生物炭处理下钝化效果最佳，土壤中更稳定的可氧化态和残渣态 Pb 质量分数最高、分别
为 64.05% 和 27.50%；土壤中 Zn 主要向可氧化态转化，残渣态 Zn 为降低趋势，但降幅较小。随着羊粪生物炭添加
量增加，TCLP 提取态 Pb、Zn 质量分数均显著降低，可有效降低污染农田土壤生态风险。【结论】针对铅锌矿区
附近受重金属污染农田土壤，采用淹水配施羊粪生物炭的方法，可降低土壤中 Pb、Zn 有效性和生态风险，5.0% 羊
粪生物炭添加量对土壤重金属 Pb、Zn 的钝化效果最佳。 |
| 英文摘要: |
| 【Objective】The study was conducted to explore the effect of sheep manure biochar on the availability of
Pb and Zn in soil polluted by compound heavy metals under flooding conditions, and provides the basis for controlling heavy
metal pollution of farmland soil.【Method】Using the polluted farmland soil near a lead-zinc mining area in Yunnan as the
research object, static culture experiments were conducted to study the effects of different addition rates of sheep manure
biochar (0%, 2.5%, 5.0% and 7.5%) on the pH and availability of Pb and Zn in polluted soil under flooding condition. And the ecological and environmental risks were evaluated by the toxicity characteristics leaching procedure (TCLP).【Result】
Compared with the control, the soil pH value of sheep manure biochar treatment increased by 0.04-0.11 units, and the mass
fractions of soil available Pb and Zn were significantly reduced by 32.01%-58.09% and 6.44%-9.15%, respectively. The soil
pH and mass fractions of soil available Pb and Zn showed extremely significant negative correlation and significant negative
correlation, respectively. From the perspective of heavy metal occurrence forms, sheep manure biochar significantly promoted
the passivation of Pb and Zn. Among them, 5.0% sheep manure biochar treatment had the best passivation effect, promoting
the transformation of heavy metal Pb into more stable forms in soil, resulting in the highest mass fractions of oxidizable and
residual forms, which were 64.05% and 27.50%, respectively. In the soil, Zn mainly transformed into an oxidizable state, but
residual Zn showed a decreasing trend with a relatively small decrease. The mass fractions of Pb and Zn extracted by TCLP
significantly decreased with the increase of biochar addition rate, effectively reducing the ecological risk of polluted farmland
soil. 【Conclusion】For heavy metal contaminated farmland soil near lead-zinc mining areas, the method of flooding combined
with applying sheep manure biochar can reduce the availability and ecological risks of Pb and Zn in soil. The addition amount of
5.0% sheep manure biochar has the best passivation effect on soil heavy metals Pb and Zn. |
|
查看/发表评论 下载PDF阅读器 |
