Phytoremediation of perchlorate by free floating macrophytes

被引：17
作者：
Bhaskaran, Krishnakumar [1 ]
Nadaraja, Anupama Vijaya [1 ]
Tumbath, Soumya [1 ]
Shah, Liji Babu [1 ]
Veetil, Prajeesh Gangadharan Puthiya [1 ]
机构：
[1] Natl Inst Interdisciplinary Sci Technol CSIR Indi, Thiruvananthapuram 19, Kerala, India
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2013年 / 260卷
关键词：
Perchlorate; Phytoremediation; Phytoaccumulation; Rhizodegradation; CONTAMINATED WATERS; DRINKING-WATER; REDUCTION; ACCUMULATION; LETTUCE; BIOREACTOR; CHLORIDE; NITRATE; PLANTS;
D O I：
10.1016/j.jhazmat.2013.06.008
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Phytoremediation of perchlorate by free floating macrophytes (Eichornia, Pistia, Salvinia and Lemna) was evaluated in this study. Among the plants tested, Pistia showed 63.8 +/- 4% (w/v) removal of 5 mg/L level perchlorate in 7 days, whereas the removal was absent in other plants. Phyto-accumulation (18.2%) and rhizo-degradation (45.68%) were identified as the mechanisms involved in perchlorate removal in Pistia. Whole plant extraction yielded 45.4 mu g perchlorate/g dry weight biomass in 7 days period. High intensity of light and presence of nitrate negatively affected perchlorate removal by Pistia. An enrichment of Pistia root homogenate exhibited faster reduction of perchlorate where 100 mg/L of the compound was reduced completely in 48 h under anoxic condition. A novel perchlorate reducing bacterium, isolated from Pistia root homogenate enrichment was identified as Acinetobacter sp. NIIST (Genbank JX467695). (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：901 / 906
页数：6
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