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" Fate of Engineered Nanomaterials in Wastewater Biosolids, Land Application, and Incineration : "
Paul Westerhoff
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BL
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763534
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b583515
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| Main Entry
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Paul Westerhoff
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Fate of Engineered Nanomaterials in Wastewater Biosolids, Land Application, and Incineration : : WERF Research Report Series.\ Paul Westerhoff
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| Publication Statement
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[Place of publication not identified] : IWA Publishing, 2014
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(104 pages)
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| ISBN
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1780405499
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: 9781780405490
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| Contents
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Cover; Copyright; Acknowledgments; Abstract and Benefits; Table of Contents; List of Tables; List of Figures; List of Acronyms; Executive Summary; Chapter 1.0: Introduction; 1.1 Background; 1.2 Goals and Research Questions; 1.3 Organization of Report; Chapter 2.0: Experimental Methods and Materials; 2.1 Laboratory Methods; 2.1.1 Batch NM Sorption Tests; 2.1.2 Sources and Size Discrimination of Titanium Dioxide NMs in Food and PCPs; 2.1.3 SBRs; 2.1.4 Biosolids Incineration Tests; 2.1.5 Effect of ENMs on Biological Carbon Conversion in an Arizona Soil Under Dark Conditions; 2.2 Field Sampling. 2.2.1 Analysis of Aqueous Samples by sp-ICP-MS2.2.2 Biosolids Processing Facilities; 2.2.3 Biosolid Management Facility (Texas); 2.3 Analytical Methods; 2.3.1 Chemical Analysis; 2.3.2 Electron Microscopy Analysis; Chapter 3.0: Absorption of ENM to Wastewater Biomass; 3.1 Batch Sorption Experiments; 3.2 Composition and Properties of Food-Grade Titanium Dioxide; 3.3 Titanium Content of Foods; 3.4 Titanium Content in PCPs; 3.5 Titanium Content of Paints and Adhesives; 3.6 Selection of Titanium Dioxide Models for Environmental Studies; 3.7 Sorption of E171/P25 --; Titanium Dioxide to Biomass. 3.8 SummaryChapter 4.0: Occurrence of ENMs in Treated Effluents and Biosolids; 4.1 Detection of ENMs in Water by Single Particle ICP-MS; 4.2 Mass Flow of Titanium During Biosolids Treatment; 4.3 Metals in EPA Composite Biosolid Samples; 4.3.1 Sample Description; 4.3.2 Normalized Metal Concentrations in Biosolids; 4.3.3 Partitioning of Metals from Sewage into Biomass; 4.4 Occurrence of ENMs in Biosolids from the 2001 EPA NSSS; 4.4.1 Identification of Metallic Particles in Biosolids by SEM/EDX; 4.4.2 Occurrence of Nano Titanium Dioxide Particles in Biosolids by TEM/EDX. 4.4.3 Mixed Metal Precipitate by SEM-Element Mapping4.4.4 The Probability to Locate Metallic Particles in Biosolids by Electron Microscopy; 4.5 Change of ENMs in Biosolids Incineration; 4.6 Summary; Chapter 5.0: Occurrence and Impacts of ENMs in Biosolids Amended Soils; 5.1 Metal Accumulation Survey and Occurrence of Metallic ENMs in Biosolids Amended Soils; 5.1.1 The Accumulation of Selected Metals in Biosolids Amended Soils; 5.1.2 Metal Profiles in Different Depth of Soils; 5.1.3 Nanoparticle Related Metal Profiles in Biosolids Amended Soils (Austin, TX) 5.1.4 The Potential Highest Concentrations of ENMs in Soils5.1.5 The Presence of Titanium Dioxide Nanoparticles and Micro Particles in TX Soil; 5.2 Effects of ENMs on Basal Respiration in Soils; 5.3 Effects of ENMs on SIR in Soils; 5.4 Summary; Chapter 6.0: Summary, Conclusions, and Recommendations; 6.1 Summary and Conclusions; 6.1.1 Absorption of ENM to Wastewater Biomass; 6.1.2 Occurrence of ENMs in Wastewater Effluent and Biosolids; 6.1.3 Occurrence and Impacts of ENMs in Biosolids Amended Soils; 6.2 Recommendation for Future Research; References.
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| Abstract
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Laboratory experiments were conducted using two types of well characterized ENMs, including ENMs of similar size but different surface functional group and ENMs contained in consumer products. A sorption protocol was developed to study the sorption behaviors of hydrophobic, cationic organic molecules and ionic silver on fresh and freeze dried biomass. Partition coefficients of model ENMs with wastewater biomass were determined in a series of batch experiments. In order to assess the occurrence of ENMs in biosolids and biosolids amended soils, field samples were collected from WWTPs, a set of EPA biosolids composite samples and full scale biosolids handling facilities. ENMs were found to be present in biomass, biosolids and soils receiving land-application of biosolids. The most common ENM observed was titanium dioxide. Other metallic particles in micro meter size were identified in biosolids, including precious metals such as gold and silver. This study is among the first to conduct in-depth and extensive characterization of metallic materials in biosolids, using scanning (SEM) and transmission (TEM) electron microscopy. To support these full-scale observations that ENMs accumulate in biomass, the laboratory work explored ways to predict the presence of ENMs in biosolids in the future as more ENMs are used by industry, commercial sectors and residences.
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Nanostructured materials -- Environmental aspects.
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SCIENCE / Applied Sciences
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Sewage -- Purification -- Sequencing batch reactor process.
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Paul Westerhoff
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