Department of Cultural Heritage Conservation, National Yunlin University of Science and Technology, Douliu, Taiwan.
Environmental Protection Administration, Taipei, Taiwan.
Int J Phytoremediation. 2022;24(4):334-341. doi: 10.1080/15226514.2021.1937933. Epub 2021 Jun 24.
Phytoextraction by native Taiwanese chenopod ( Koidz.) and Napier grass () for heavy metals such as chromium (Cr), nickel (Ni), and copper (Cu) was reported first. Maximum bioconcentration factors of Cu and Cr were 8.8 and 12.5 by Taiwanese chenopod. Napier grass cultivar Taishi No.4 plants demonstrated higher survivals than that of Taiwanese chenopod, under heavy metal stress in soils. All heavy metal accumulation and biomass data were employed, as well as historical engineering data were collected for conventional excavation-and-refill remediation of two sites. Life cycle assessment (LCA) was conducted for comparing environmental performances of phytoextraction and conventional remediation for two contaminated sites. Assuming one-year growth, three harvests were done and biomass was collected and sent to the nearest municipal incinerators, phytoextraction by both plants demonstrated superior environmental performances than conventional methods for contaminated site remediation. High quantities of fuels to haul the soils of conventional methods mainly contributed to the greenhouse gas emission. Phytoextraction has the most advantages for sites with lesser extents of pollution and time restraints. Environmental performances of phytoremediation were even better if energy recovered from biomass incineration is counted. Phytoextraction by native Taiwanese chenopod and Napier grass was firstly reported. Life cycle assessment was conducted for comparing the phytoextraction and conventional remediation. Phytoextraction demonstrated superior environmental performances. Energy reutilization of biomass recovered made phytoremediation more sustainable.
首次报道了本地台湾藜（Chenopodium formosanum Koidz.）和象草（Pennisetum purpureum Schum.）对铬（Cr）、镍（Ni）和铜（Cu）等重金属的植物提取作用。台湾藜对 Cu 和 Cr 的最大生物浓缩系数分别为 8.8 和 12.5。在土壤重金属胁迫下，台饲 4 号象草的存活率高于台湾藜。所有重金属积累和生物量数据以及传统挖掘和回填修复的历史工程数据都被收集用于两个地点的修复。为了比较两种污染场地的植物提取和传统修复的环境性能，进行了生命周期评估（LCA）。假设一年的生长周期，进行了三次收获，并收集了生物量并送到最近的城市垃圾焚烧厂，两种植物的植物提取都表现出比传统方法更优越的环境性能，用于污染场地修复。传统方法中大量运输土壤的燃料主要导致温室气体排放。对于污染程度较小和时间限制较大的场地，植物提取具有最大的优势。如果计入从生物质焚烧中回收的能源，植物修复的环境性能甚至更好。首次报道了本地台湾藜和象草的植物提取作用。进行了生命周期评估以比较植物提取和传统修复。植物提取表现出优越的环境性能。生物质回收的能源再利用使植物修复更加可持续。
