Microbial characteristics of a Zn and Cd contaminated soil chemically amended for growth of a heavy metal-hyperaccumulating plant

Article

Peng, Gui-xiang, Cai, Jing and Lin, Chu-xia. 2005. "Microbial characteristics of a Zn and Cd contaminated soil chemically amended for growth of a heavy metal-hyperaccumulating plant." Ecology and Environment. 14 (5), pp. 654-657.
Article Title

Microbial characteristics of a Zn and Cd contaminated soil chemically amended for growth of a heavy metal-hyperaccumulating plant

Article CategoryArticle
AuthorsPeng, Gui-xiang (Author), Cai, Jing (Author) and Lin, Chu-xia (Author)
Journal TitleEcology and Environment
Journal Citation14 (5), pp. 654-657
Number of Pages4
Year2005
Place of PublicationChina
Web Address (URL)http://www.jeesci.com
Abstract

A pot experiment was conducted to examine the effects of chemical amendment on the microbial characteristics of a
heavy metal-contaminated soil used for the growth of a hyperaccumulating plant, Sedum alfredii Hance. The results show that the abundance of the soil microbes bacteria, actinomycetes and fungi) is significantly (at p=0.01) related to the removal rate of Zn and Cd from the soil, the dry biomass of Sedum alfredii Hance, Cmic, and Cmic/Nmic except that the number of fungi is only significantly
(at p=0.05) related to Cmic/Nmic. All the soil treatments enhanced the activities of soil microbes. In general, the increase in activity of different types of microbes was in the following decreasing order: bacteria>actinomycetes>fungi. Of all the treatments, Treatment 7 (mixing 1 000 g of the contaminated soil with 6 g of red mud, 15 g of zeolitic rock powder and 15 g of biosolids) formed a best soil medium for the growth of the soil microbes. The microbial biomass C concentration in Treatment 7 was as high as 345.64 mg·kg-1, which was statistically different from other treatments and represented the highest value among all the treatments in this experiment. This work has implications for the future development of a combined chemical and biological remediation technique for the cleanup of Zn and Cd contaminated soils.

Keywordssoil microbes; heavy-metal contamination; phytoremediation; soil amendment; Sedum alfredii Hance
ANZSRC Field of Research 2020419999. Other environmental sciences not elsewhere classified
Public Notes

c. China Academic Journal Electronic Publishing House. Text in Chinese.

Byline AffiliationsSouth China Agricultural University, China
Institution of OriginUniversity of Southern Queensland
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