Environmental Risk Implications of Metals in Sludges from Waste Water Treatment Plants: The Discovery of Vast Stores of Metal-Containing Nanoparticles
| Autor: | Xing-pan Guo, Yi Yang, Jing-nan Feng, Fei-yun Tou, Zuo-shun Niu, Michael F. Hochella, Hui Pan, Xiang-Zhou Meng, Min Liu, Yukun Qin |
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| Rok vydání: | 2017 |
| Předmět: |
China
Particle number chemistry.chemical_element 02 engineering and technology Zinc Wastewater 010501 environmental sciences Mass spectrometry 01 natural sciences Water Purification Metals Heavy Environmental Chemistry Inductively coupled plasma mass spectrometry 0105 earth and related environmental sciences Cadmium Sewage Extraction (chemistry) Water General Chemistry 021001 nanoscience & nanotechnology chemistry Environmental chemistry Nanoparticles Sewage treatment 0210 nano-technology Sludge Environmental Monitoring |
| Zdroj: | Environmental Science & Technology. 51:4831-4840 |
| ISSN: | 1520-5851 0013-936X |
| Popis: | Nanoparticle (NP) assessment in sludge materials, although of growing importance in eco- and biotoxicity studies, is commonly overlooked and, at best, understudied. In the present study, sewage sludge samples from across the mega-city of Shanghai, China were investigated for the first time using a sequential extraction method coupled with single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) to quantify the abundance of metal-containing NPs in the extraction fractions and transmission electron microscopy to specifically identify the nanophases present. In general, most sludges observed showed high concentrations of Cr, Cu, Cd, Ni, Zn, and Pb, exceeding the maximum permitted values in the national application standard of acid soil in China. NPs in these sludges contribute little to the volume and mass but account for about half of the total particle number. Based on electron microscopy techniques, various NPs were further identified, including Ti-, Fe-, Zn-, Sn-, and Pb-containing NPs. All NPs, ignored by traditional metal risk evaluation methods, were observed at a concentration of 10 |
| Databáze: | OpenAIRE |
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