摘要
为选择超积累重金属和对气候具有耐性的植物,以达到利用植物修复重金属污染土壤的目的。采用田间种植,比较了超积累重金属植物大叶红苋菜(298)与野苋菜、向日葵、玉米等4种植物修复铬污染。根茎叶经晒干灼烧,回收铬处理,而实现无二次污染修复土壤。研究结果表明:这些植物的根茎叶对皮革工业铬污染具有较强的吸收和积累能力,野苋菜的地上部生物量分别是向日葵的1.5倍、玉米的1.2倍、大叶红苋菜(298)的1.05倍。对于地下部生物量而言,4种植物的高低顺序依次为野苋菜>大叶红苋菜(298)>玉米>向日葵。4种植物的根茎叶对铬累积量的高低顺序依次为野苋菜>大叶红苋菜(298)>向日葵>玉米。野苋菜能吸收富集铬重金属并且具有耐铬重金属的特性,基于其具有生物量较大、生长速度快、耐高温、耐干旱的特点,作为重金属污染的修复植物具有较好的应用前景。
The enrichment of chromic in the Amarantus viridis L., Amarantus viridis L（298）, Helianthus annuus and Zea mays L.by field-planted were compared to phytoremediate the soil of leather industry polluted by chromic heavy metal. Caudexes and leaves of Amarantus viridis L. were cauterized after being insolated to recycle for chromic and carry out the phytoremediation in the soil without pollution. The results showed that the effect on chromic uptake and accumulation in those plants were marked,the biomass in shoot of Arnarantus viridis L.were 1.5 times higher than Helianthus annuus, 1.2 times higher than Zea mays L, 1.0.5 times higher than Amarantus viridis L （298）.Otherwise,among in root of those plants,Amarantus viridis L was the highest,then was Amarantus viridis L （298）, Zea mays L. and Helianthus annuus, respectively. The chromic content of Amarantus viridis L. was the highest,then was Amarantus viridis L （298）, Helianthus annuus and Zea mays L., respectively. Showing by comprehensive analysis that, Amarantus viridis L. could concentrate chromic heavy metals and had the characteristics of a greater biomass, resisting high temperature and drought, which had a better potential and practical use in phytoremediation.
出处
《食品工业科技》
CAS
CSCD
北大核心
2010年第1期105-106,111,共3页
Science and Technology of Food Industry
基金
浙江省质量技术监督局计划项目(20070228)
关键词
重金属
野苋莱
植物修复
超积累植物
heavy metal
Amarantus viridis L.
phytoremediation
hyperaccumulator
