Journal
WATER AIR AND SOIL POLLUTION
Volume 227, Issue 4, Pages -Publisher
SPRINGER INT PUBL AG
DOI: 10.1007/s11270-016-2818-y
Keywords
Modified excess sludge; Artemisia ordosica; Heavymetal; Transformation; Species distribution
Funding
- National Natural Science Foundation of China [21203163]
- National Natural Science Gold Project
- Shaanxi Provincial Science and Technology Department Foster Industrialization Projects [15JF035]
- Scientific Research Starting Foundation [12GK04]
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A greenhouse experiment was accomplished to investigate the feasibility of excess sludge modified by coal fly ash pretreatment and gamma-ray irradiation in soil application for cultivation of Artemisia ordosica. The results showed that modified excess sludge provided a positive effect on the growth of Artemisia ordosica. The modified excess sludge and aeolian sandy soil at the volume ratio of 1: 2 was optimal, and nutrient concentrations of Artemisia ordosica reached the highest. In the aeolian sandy soil, the bio-concentration factor values of most heavy metals were less than 1.0 except for Cu, Zn, and Ni. The average bio-concentration factor values of heavy metals in Artemisia ordosica increased in a sequence of Mo< Cd< Fe< V < Cr < Co< Mn< Pb< Cu< Zn< Ni for all samples. Artemisia ordosica could be used to decrease the bioavailability and eco-toxicity of Ni, V, and Mo in all cultivation experiments of artificial soil, and Artemisia ordosica could also reduce the bioavailability and eco-toxicity of Cu, Cd, Cr, and Mn in the artificial soil of modified excess sludge and aeolian sandy soil at the volume ratio of 1: 2.
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