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Studies from University of Arizona Provide New Data on Nanomaterials (Engineered Nanomaterials Impact Biological Carbon Conversion in Soils)

August 20, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- New research on Nanomaterials is the subject of a report. According to news originating from Tucson, Arizona, by VerticalNews correspondents, research stated, "Engineered nanomaterials (ENMs) increasingly used in commercial products can accumulate in biosolids. Land application of biosolids potentially leads to consequent exposure of ENMs to soils."

Our news journalists obtained a quote from the research from the University of Arizona, "This article examines the impact of ENM-amended biosolids on biological carbon dioxide production in soils. ENMs, including nano-silver (Ag), zinc oxide (ZnO), titanium dioxide (TiO2), and cerium oxide (CeO2), were applied to soils with dosages of 1 and 1,000mg/kg, simulating the normal and high concentration exposure scenarios, respectively. Under dark conditions, 1,000mg/kg of nano-Ag and ZnO exhibited inhibitory effects on aerobic carbon conversion in both a 28-day basal respiration test and a modified 24-h substrate-induced respiration (SIR) test. At 1 and 1,000 mg/kg levels, nano-TiO2 was found to be inert to carbon conversion in both respiration tests. Nano-CeO2 at 1,000mg/kg exhibited an increased basal respiration rate (48% higher than in the control soil), but having a minimum inhibitory effect in the SIR test. Single particle-inductively coupled plasma-mass spectrometry was used to determine the presence of nano-sized particles in water extracted from soils after 28 days of respiration test. Soils treated with nano-TiO2, CeO2, and Ag released < 1% of nanoparticles into the extracted water, while the majority of ENMs were still retained in the soil. Nano-and micron-sized particles containing zinc were not detected even in soils treated with 1,000mg/kg of nano-ZnO."

According to the news editors, the research concluded: "The findings of this article will inform scientific and regulatory communities about the potential effects of ENMs on microbial respiration in biosolid-amended soils."

For more information on this research see: Engineered Nanomaterials Impact Biological Carbon Conversion in Soils. Environmental Engineering Science, 2014;31(7):381-392. Environmental Engineering Science can be contacted at: Mary Ann Liebert, Inc, 140 Huguenot Street, 3RD Fl, New Rochelle, NY 10801, USA. (Mary Ann Liebert, Inc. - www.liebertpub.com; Environmental Engineering Science - www.liebertpub.com/overview/environmental-engineering-science/15/)

The news correspondents report that additional information may be obtained from Y. Yang, University of Arizona, Water Resources Res Center, Tucson, AZ, United States. Additional authors for this research include X.Y. Bi, P. Westerhoff, K. Hristovski and J.E. McLain.

Keywords for this news article include: Tucson, Arizona, Engineering, United States, Nanotechnology, Emerging Technologies, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Engineering


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