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| Effects of different concentrations and sources of silver nanoparticles on growth and metal uptake by Sedum plumbizincicola |
| Received:August 11, 2016 |
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| KeyWord:silver nanoparticles(AgNPs);sewage sludge;Sedum plumbizincicola;cadmium;zinc |
| Author Name | Affiliation | E-mail | | WANG Zhao-yang | College of Environmental Science and Engineering, Anhui Normal University, Wuhu 241000, China
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China | | | MA Ting-ting | Institute of Hanjiang, Hubei University of Arts and Sciences, Xiangyang 441053, China | | | ZHOU Tong | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China | | | LI Zhu | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China | | | WU Long-hua | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China | lhwu@issas.ac.cn | | ZHOU Shou-biao | College of Environmental Science and Engineering, Anhui Normal University, Wuhu 241000, China | | | LUO Yong-ming | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China | |
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| Abstract: |
| The recent gradual increase in the use of silver nanoparticles(AgNPs) has resulted in a rapid increase in the release of silver(Ag) to the environment and has led to serious environmental risk. A glasshouse pot experiment was conducted in which treatments with and without sewage sludge application were set up with addition of AgNPs at concentrations ranging from 0 to 10 mg·kg-1. The effects of AgNP addition at different concentrations and from different sources to Sedum plumbizincicola on plant growth and Ag, cadmium(Cd), and zinc(Zn) uptake from the soil were studied. The results indicate that:AgNPs treatment alone had no significant effect on the growth of S. plumbizincicola at a concentration range of 0~10 mg·kg-1, but the application of sewage sludge significantly inhibited the growth and biomass of S. plumbizincicola plants(P<0.05); As the AgNPs concentration increased there was no significant change in Ag concentration in S. plumbizincicola shoots but the concentration in the roots increased markedly with a maximum concentration of 2.07 mg·kg-1. The enrichment factor of Ag in the roots(0.177~0.330) was significantly higher than that in the aboveground parts(0.001 01~0.004 02). Cadmium and Zn concentrations in the soil were not changed significantly after planting of S. plumbizincicola. The amounts of Cd and Zn taken up by potted plants from the test soils were 2.62%~7.14% and 2.39%~7.65%, respectively. Irrespective of whether AgNPs were added directly or mixed with sewage sludge they exerted no significant effect on the uptake of Cd or Zn by S. plumbizincicola. |
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