三种铁改性生物炭在富营养化水体中的修复效果对比研究  

Comparative Study on Remediation Effects of Three Types of Iron-Modified Biochar in Eutrophication Water

作　　者：奚霄松 金辰 

机构地区：[1]上海园林绿化建设有限公司,上海 [2]南大(常熟)研究院有限公司,江苏 常熟

出　　处：《植物学研究》2022年第1期81-88,共8页Botanical Research

摘　　要：本文以三种农业常见废弃秸秆为材料,以上海市闵行区外环绿道富营养化水体为受试对象,研究在原位修复基础上,三种秸秆生物炭的氯化铁改性产物对水体氮磷的去除效率。研究发现,经氯化铁改性后,三种秸秆生物炭物理表征均出现明显改变,以水稻秸秆生物炭为著,在表面官能团丰富度、比表面积、孔度、pH值等方面均有改变。原位修复试验结果表明,三种氯化铁改性秸秆生物炭均能够有效降低富营养化水体中的COD、铵态氮、总磷浓度,有效降低水体pH,显示出良好的富营养化水体修复效率,其中,以水稻秸秆生物炭改善效果最为显著。综上,经氯化铁改性后的秸秆生物炭,能够在小流域景观水系中发挥较好的修复能力,为改善城市景观水域富营养化状态提供了一种低成本、高能效的可选方案。In this article, three kinds of common agricultural waste straws are used as materials, and the eutrophic water body of the outer ring greenway in Minhang district of Shanghai is taken as the test object. On the basis of in-situ remediation, the removal efficiency of nitrogen and phosphorus by three ferric chloride modified products of straw biochar is studied. The study found that the physical characterization of the three kinds of straw biochar changed significantly after modification by ferric chloride, and rice straw biochar was the most notable one, as its surface functional group richness, specific surface area, porosity and pH value all changed to some extent. The results of in-situ remediation test show that the three kinds of straw biochar modified by ferric chloride are able to effectively reduce the concentration of nitrate nitrogen, ammonium nitrogen and calcium superphosphate in eutrophic waterbody, showing a good remediation efficiency of eutrophic water body, with rice straw biochar displaying the most significant improvement. In conclusion, straw biochar modified by ferric chloride can play a good role in the restoration of landscape water systems in small watersheds, and provide a low-cost and energy-efficient alternative to improve the eutrophication condition of urban landscape waters.

关 键 词：生物炭 铁改性 富营养化 氮磷 原位修复 

分 类 号：S816.5[农业科学—饲料科学]