This study compared the degradation of indigenous bisphenol A (BPA) and triclosan (TCS) in a biosolids-amended soil, to the degradation of spiked labelled surrogates of the same compounds (BPA-d16 and TCS-(13)C12). The aim was to determine if spiking experiments accurately predict the degradation of compounds in biosolids-amended soils using two different types of biosolids, a centrifuge dried ...

Organic waste beneficial-use programs effectively recycle plant nutrients when applied at agronomic rates. Our objectives were to determine: biosolids nitrogen (N) fertilizer equivalency; biosolids N mineralization during years of above and below average precipitation and long-term N mineralization; which soil phosphorus (P) phases dominate following years of biosolids application; and the pote...

Triclocarban (TCC) and triclosan (TCS), two of the most commonly used antimicrobial compounds, can be introduced into ecosystems by applying wastewater treatment plant biosolids to agricultural fields. Concentrations of TCC and TCS were measured in different trophic levels within a terrestrial food web encompassing land-applied biosolids, soil, earthworms (Lumbricus), deer mice (Peromyscus mani...

oncerns over the long-term reliability of land application of Class B biosolids are causing many utilities to examine alternatives for effectively disposing of biosolids. Most wastewater treatment plants in Florida rely upon private contractors to dispose of residual biosolids in either a liquid or cake form. Currently, the predominant disposal method is application of digested biosolids on agr...

This study examines polybrominated diphenyl ethers (PBDE) levels, trends in biosolids from a wastewater treatment plant, and evaluates potential factors governing PBDE concentrations and the fate in agricultural soils fertilized by biosolids. The mean concentration of the most abundant PBDE congeners in biosolids ( summation operatorBDE-47, BDE-99, and BDE-209) generated by one wastewater treat...

The transmissible spongiform encephalopathies (TSE) are a group of neurological prion diseases of mammals caused by infectious prion proteins. Prions may be present in raw wastewater through the discharge, animal rendering and meat processing operations that may process BSE-contaminated cattle or scrapie infected sheep. Recently, a cell culture method was developed to detect the infectivity of ...

Title of Thesis: ENVIRONMENTAL FATE OF POLYBROMINATED DIPHENYL ETHERS IN AGRICULTURAL SOILS WHICH HAVE RECEIVED BIOSOLIDS APPLICATION Natasha Almeida Andrade, Master of Science, 2008 Directed By: Professor Alba Torrents Department of Civil and Environmental Engineering and Dr. Laura McConnell U.S. Department of Agriculture Polybrominated diphenyl ethers (PBDEs) are used as additives in consumer...

This study evaluated the influence of 20 annual land applications of Class B biosolids on the soil microbial community. The potential benefits and hazards of land application were evaluated by analysis of surface soil samples collected following the 20th land application of biosolids. The study was initiated in 1986 at the University of Arizona Marana Agricultural Center, 21 miles north of Tucs...

There is a growing need for better assessment of health risks associated with land-applied biosolids. This study investigated in-situ decay of seeded human adenovirus (HAdV), Salmonella enterica, Escherichia coli, and bacteriophage (MS2) in biosolids-amended soil under wheat cultivation. The biosolids seeded with microorganisms were placed in decay chambers which were then placed in the topsoil...

Concerns over the possible increase in phytoavailability of biosolids-applied trace metals to plants have been raised based on the assumption that decomposition of applied organic matter would increase phytoavailability. The objectives of this study were to assess the effect of time on chemical extractability and concentration of Cd, Cu, Ni, and Zn in plants on plots established by a single app...