| 徐颖, 谭婷, 任劲松, 李玉, 向彪, 朱永乐, 汤家喜.不同条件下生态缓冲带对氟化物面源污染的阻控效果[J].水土保持学报,2022,36(2):361~367 |
| 不同条件下生态缓冲带对氟化物面源污染的阻控效果 |
| Interception and Control Effects of Ecological Buffer Zone on Fluoride Non-point Source Pollution Under Different Conditions |
| 投稿时间：2021-08-29 |
| DOI：10.13870/j.cnki.stbcxb.2022.02.046 |
| 中文关键词: 生态缓冲带 生物炭 氟化物 径流 阻控 |
| 英文关键词: vegetation filter strips biochar fluoride runoff interception |
| 基金项目:国家自然科学基金青年科学基金项目（41501548） |
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| 中文摘要: |
| 生态缓冲带可有效截留阻控非点源污染物向水体中迁移。选取紫花苜蓿(Medicago sativa L.)、高羊茅(Festuca elata Keng ex E. Alexeev)、草木樨(Melilotus officinalis (Linn.))、早熟禾(Poa annua L.)和黑麦草(Lolium perenne L.)5种草本植物构建模拟生态缓冲带,通过人工模拟径流试验,探讨不同植被类型、污染物入流浓度、生态缓冲带坡度以及施加生物炭种类条件下,生态缓冲带对径流中氟离子阻控效果的影响。结果表明:早熟禾生态缓冲带对径流中氟化物的阻控效果最好,当流量为0.5 L/min,入流浓度 为4 mg/L,坡度为5°时,其对氟化物浓度的阻控效率为13.1%,质量阻控效率为92.6%;当流量为0.5 L/min,入流浓度为8 mg/L,坡度为5°时,其浓度阻控效率为20.6%,质量阻控效率为96.4%;坡度越小,生态缓冲带对氟化物阻控效果越好;当流量为0.5 L/min,入流浓度为4 mg/L,坡度为5°时,添加玉 米秸秆生物炭后的生态缓冲带径流阻控效率均有提高,其中草木樨缓冲带最为明显,其地表径流的阻控效率提高23.8%。 |
| 英文摘要: |
| The ecological buffer zone can effectively intercept and control the migration of non-point source pollutants into the water body. Alfalfa, tall fescue, sweet clover, Kentucky bluegrass and ryegrass were selected to construct a simulated ecological buffer zone. Through an artificial runoff simulation experiment, the effects of ecological buffer zone on the inhibition and control effect of fluoride ion in runoff under the different conditions, including different vegetation types, pollutant inflow concentrations, ecological buffer zone slopes and biochar types were discussed. The results showed that the ecological buffer zone of Kentucky bluegrass had the best effect on the inhibition and control of fluoride in runoff. When the flow was 0.5 L/min, the inflow concentration was 4 mg/L and the slope was 5°, the inhibition and control efficiency of fluoride concentration was 13.1% and the quality inhibition and control efficiency was 92.6%. When the flow rate was 0.5 L/min, the inflow concentration was 8 mg/L and the slope was 5°, the concentration resistance control efficiency was 20.6% and the mass resistance control efficiency was 96.4%. This means the smaller the slope, the better effect of ecological buffer zone on fluoride inhibition and control. When the flow was 0.5 L/min, the inflow concentration was 4 mg/L and the slope was 5°, the runoff inhibition and control efficiency of the ecological buffer zone was improved by adding corn straw biochar, especially the sweet clover buffer zone, whose surface runoff inhibition and control efficiency was increased by 23.8%. |
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