Temporal variation of vegetation at two operating landfills and its implications for landfill phytoremediation
Temporal variation of vegetation at two operating landfills and its implications for landfill phytoremediation
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DOI：
10.1080/09593330.2018.1508253
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发表时间：
2018-09
影响因子：
2.8
通讯作者：
Zhengkai Tao;W. Shi;Yang Liu;Xiaoli Chai
中科院分区：
文献类型：
--
作者：
Zhengkai Tao;W. Shi;Yang Liu;Xiaoli Chai
摘要垃圾填埋是世界各国普遍采用的固体废物处理方法，但这种方法不可避免地会带来空气和水污染等负面后果，并可能对健康造成危害。植物修复技术是解决这些问题的一种经济而有前途的技术。为了选择适合中国垃圾填埋场修复的树种，对两个不同垃圾填埋场的植被特征及其生理活性进行了研究。结果表明，两个垃圾填埋场的植被盖度均随封闭时间的延长而增加。崇明垃圾填埋场的物种多样性随着关闭时间的延长而降低，而姜村沟垃圾填埋场的物种多样性则呈现出相反的趋势。在崇明垃圾填埋场和江村沟垃圾填埋场分别鉴定出5种优势种(加拿大狗尾草、狗尾草、田菁、灰白碱蓬和芦荟)和4种优势种(高羊茅、反枝茅、多花黑麦草和地肤草)，这些优势种主要是一年生植物。此外，崇明垃圾填埋场的净光合速率最高，江村沟垃圾填埋场的净光合速率最高。气孔导度对它们的光合作用有显著影响。根据总体结果，在已确定的优势物种中，澳大利亚紫云英和狭叶锦鸡儿是潜在的非常适合用于中国垃圾填埋场修复的植物，因为它们对垃圾填埋场环境和垃圾填埋场中的自然存在具有很强的适应性。图形摘要
ABSTRACT Landfilling is a popular method to dispose of solid waste around the world, but this practice is associated with inevitable negative consequences such as air and water pollution and potential health hazards. Phytoremediation is an economical and promising technology to address these problems. To select suitable species for restoring landfills in China, the vegetation characteristics and their physiological activities were investigated in two different landfills. The results showed that the vegetation coverage of the two landfills both increased with the closure time. The species diversity decreased with the closure time in the Chongming landfill, whereas it showed the opposite trend in the Jiangcungou landfill. Five dominant species (Conyza canadensis, Setaria viridis, Sesbania cannabina, Suaeda glauca, and Phragmites australis) and four dominant species (Festuca elata Keng, Amaranthus retroflexus, Lolium multiflorum, and Kochia scoparia) were identified in the Chongming landfill and Jiangcungou landfill, respectively, and these dominant species were mainly annual plants. In addition, the net photosynthetic rate of P. australis and K. scoparia was the highest in the Chongming landfill and Jiangcungou landfill, respectively. Their photosynthetic rates were influenced significantly by stomatal conductance. Based on the overall results, among the dominant species identified, P. australis and K. scoparia represent potentially well suited plants to use in the remediation of landfills in China, because of their strong adaptability to landfill environments and natural occurrence in landfills. GRAPHICAL ABSTRACT