| 引用本文: | 孙子涵,成杰民,李欣芮.改性纳米碳黑对钝化修复Cd污染土壤中速效氮的影响[J].灌溉排水学报,2017,36(8):. |
| SUN Zihan,CHENG Jiemin,LI Xinrui.改性纳米碳黑对钝化修复Cd污染土壤中速效氮的影响[J].灌溉排水学报,2017,36(8):. |
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| 摘要: |
| 采用盆栽试验，在Cd模拟污染土壤中施入硝酸-高锰酸钾改性纳米碳黑（MBC）钝化重金属，分别种植重金属耐受植物黑麦草（Lolium Perenne L.）和重金属超积累植物红叶菾菜（Beta vulgaris L. var. cicla L.），研究了MBC在钝化修复Cd污染土壤过程中对土壤速效氮的影响。结果表明，MBC在土壤中能够有效降低土壤中DTPA-Cd质量分数，且植物和MBC联合作用更能有效地降低其质量分数。MBC能够明显增加土壤中速效氮量，更稳定地为植物生长提供营养物质。黑麦草和红叶菾菜对土壤速效氮量影响效果差异不显著，MBC可应用于有植物种植的轻污染土壤修复中，不会影响土壤中速效氮养分的量。MBC添加到土壤中会减缓土壤速效氮量的下降速率，有利于土壤养分的保持。研究结果可以为重金属原位钝化技术提供理论支持，为改性纳米碳黑成功地应用于重金属轻微、轻度污染农田土壤修复提供科学依据。 |
| 关键词: 改性纳米碳黑； Cd污染； 速效氮； 植物修复 |
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| The Effect of Modified Nano-carbon Black Particles on Available Nitrogen in Remediating Cd-Contaminated Soil |
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SUN Zihan, CHENG Jiemin, LI Xinrui
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College of Geography and Environmental, Shandong Normal University, Jinan 250014, China
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| Abstract: |
| Pot experiment was conducted in this paper to study the effect of nano-carbon black particles modified by nitric acid-potassium permanganate (MBC) on available N in remediating Cd-contaminated soils. We used ryegrass (Lolium Perenne L.) and red beet (Beta vulgaris L. var. cicla L.) as the plant model. The results showed that although MBC alone can reduce the content of DTPA-Cd in soil, a combined use of it with the two plants was more efficient. MBC significantly increased the available nitrogen and hence promoted plant growth; there is no significant difference in the available N between ryegrass and red beet. Adding MBC to the soil could slow down the decrease of available N and hence increased nutrient retention in soil. Our results provided an efficient in-situ technology to remediate soils slightly polluted by heavy metals. |
| Key words: modified nano-carbon black; Cd pollution; available nitrogen; phytoremediation |
