生物炭对粗放型绿色屋顶出流水质的影响  

Effect of Biochar on Effluent Quality of Extensive Green Roof

作　　者：刘芳 罗婷[2,3] 马悦阳 舒倩 夏栋 LIU Fang;LUO Ting;MA Yueyang;SHU Qian;XIA Dong(College of Hydraulic&Environmental Engineering,China Three Gorges Univ.,Yichang 443002,China;Hubei Engineering Research Center of Cement-based Ecological Restoration Technology,China Three Gorges Univ.,Yichang 443002,China;College of Civil Engineering&Architecture,China Three Gorges Univ.,Yichang 443002,China;College of Biological&Pharmaceutical Sciences,China Three Gorges Univ.,Yichang 443002,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]三峡大学水泥基生态修复技术湖北省工程研究中心,湖北宜昌443002 [3]三峡大学土木与建筑学院,湖北宜昌443002 [4]三峡大学生物与制药学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2023年第2期1-6,29,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(51979147);自然资源部城市国土资源监测与仿真重点实验室开放基金(KF-2019-04-071);宜昌市自然科学研究项目(A20-3-010)。

摘　　要：以粗放型绿色屋顶的基质层为研究对象,构建了2组不同基质的粗放型绿色屋顶装置,每组设置了4个梯度(0%、6%、8%、10%)的生物炭,考察各组在经历9次人工降雨过程中,基质淋失率、出流水样的水质和污染负荷削减率的差异.结果表明:添加生物炭在抑制基质淋失率和提高出流水质方面作用明显.其中以在植被混凝土为主要基材中添加8%生物炭对于基质淋失率和出流水样中的N、P质量浓度的抑制作用、污染负荷的整体削减作用都是最好的;以在园林废弃物为主要基材中添加10%生物炭对于提高出流水质、削减污染负荷的效果是最好的,但是在抑制基质淋失率方面添加6%生物炭的设施效果最好.Taking the substrate composition of extensive green roof as the research object, two groups of extensive green roof devices with different substrates were constructed. Each group contained four gradients(0%, 6%, 8%, 10%) of biochar respectively to investigate the differences of substrate leaching rate, water quality of effluent sample and pollution load reduction rate during 9 artificial rainfall processes. The results show that the addition of biochar plays an obvious role in inhibiting matrix leaching rate and improving effluent quality. The eco-restoration vegetation concrete as the main substrate with additional 8% biochar is the best for the inhibition of matrix leaching rate, N and P concentration in outflow water sample and the overall reduction of pollution load. Taking garden waste as the main substrate, additive of 10% biochar has the best effect on improving effluent water quality and reducing pollution load, while additive of 6% biochar has the best effect on inhibiting matrix leaching rate.

关 键 词：生物炭 粗放型绿色屋顶 基质淋失率 出流水质 污染负荷削减率 

分 类 号：X705[环境科学与工程—环境工程]