期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 17, 期 3, 页码 256-263出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2014.883497
关键词
Calendula officinalis L; cadmium; lead; photosynthetic pigments; humic acid; oilcake manure; EDDS; remediation ratio
资金
- University Grant Commission, India
The ability of hyperaccumulator oilcake manure as compared to chelates was investigated by growing Calendula officinalis L for phytoremediation of cadmium and lead contaminated alluvial soil. The combinatorial treatment T-6 [2.5 g kg(-1) oilcake manure + 5 mmol kg(-1) EDDS] caused maximum cadmium accumulation in root, shoot and flower up to 5.46, 4.74 and 1.37 mg kg(-1) and lead accumulation up to 16.11, 13.44 and 3.17 mg kg(-1), respectively at Naini dump site, Allahabad (S-3). The treatment showed maximum remediation efficiency for Cd (RR = 0.676%) and Pb (RR = 0.202%) at Mumfordganj contaminated site (S-2). However, the above parameters were also observed at par with the treatment T-5 [2.5 g kg(-1) oilcake manure + 2 g kg(-1) humic acid]. Applied EDDS altered chlorophyll a, chlorophyll b, and carotene contents of plants while application of oilcake manure enhanced their contents in plant by 3.73-8.65%, 5.81-17.65%, and 7.04-17.19%, respectively. The authors conclude that Calendula officinalis L has potential to be safely grown in moderately Cd and Pb-contaminated soils and application of hyperaccumulator oilcake manure boosts the photosynthetic pigments of the plant, leading to enhanced clean-up of the cadmium and lead-contaminated soils. Hence, the hyperaccumulator oilcake manure should be preferred over chelates for sustainable phytoremediation through soil-plant rhizospheric process.
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