Soil Awareness and Education : Developing a pan European Approach

This paper describes the activities of the Working Group (WG) on Soil Awareness and Education established in 2008 under the banner of the European Soil Bureau Network (ESBN), sponsored by the Joint Research Centre (JRC) of the European Commission (EC). In their individual countries members of the group have been involved in a range of activities reaching out to the education sector and policy and public stakeholder groups. This group plans to build on these activities, share best practice and develop initiatives to take forward at the European level

Comparison of Surface and Spectral Properties of Optical Sensor Layers Prepared by Spin/Spray Coating and Printing Techniques

This study investigated the surface properties of optical sensor layers prepared using sol-gel technology and their response to dissolved NH3. A glass substrate was used to fabricate the optical sensor layers. The sol-gel solution was applied to the glass substrate using three different techniques: spin coating (SC), inkjet printing (IP), and spray coating (SP). In this work, we have attempted to investigate the effects of the different techniques for producing the sensor layers and to determine their response in the presence of ammonia. The surface properties (surface free energy—SFE and surface chemical composition—XPS) and spectral properties (response to ammonia and real-time response) of the prepared optical sensor layers were characterised. The results show that the sensor layers prepared by different techniques have similar SFE and XPS values, but different responses to dissolved NH3 solution and different responses in real-time measurements (exposure to fresh fish). Sensor layers prepared with a spray coating (SP) are the most responsive, the most sensitive, and have a higher response over time and the biggest colour change compared to SC and IP sensor layers

Single application of sewage sludge - impact on the quality of an alluvial agricultural soil.

The effects of sewage sludge on soil quality with regard to its nutrient and heavy metal content, microbial community structure and ability to maintain specific soil function (degradation of herbicide glyphosate) were investigated in a three months study using an alluvial soil (Eutric Fluvisol). Dehydrated sewage sludge significantly increased soil organic matter (up to 20.6% of initial content), total and available forms of N (up to 33% and 220% of initial amount, respectively), as well as total and plant available forms of P (up to 11% and 170% of initial amount, respectively) and K (up to 70% and 47% of initial amount, respectively) in the upper 2cm soil layer. The increase of organic matter was most prominent 3d after the application of sewage sludge, after 3months it was no longer significant. Contents of nutrients kept to be significantly higher in the sewage sludge treated soil till the end of experiment. Contents of some heavy metals (Zn, Cu, Pb) increased as well. The highest increase was found for Zn (up to 53% of initial amount), however it was strongly bound to soil particles and its total content was kept below the maximum permissible limit for agricultural soil. Based on molecular fingerprinting of bacterial 16S rRNA gene and fungal ITS fragment on 3rd day and 3rd month after sewage sludge amendment, significant short term effects on bacterial and fungal communities were shown due to the sewage sludge. The effects were more pronounced and more long-term for bacterial than fungal communities. The mineralization of (14)C-glyphosate in the sewage sludge soil was 55.6% higher than in the control which can be linked to (i) a higher glyphosate bioavailability in sewage sludge soil, which was triggered by the pre-sorption of phosphate originating from the sewage sludge and/or (ii) beneficial alterations of the sewage sludge to the physical-chemical characteristics of the soil

The FOOTPRINT software tools: pesticide risk assessment and management in the EU at different spatial scales.

Original paper can be found at: http://www.ask-eu.com/default.asp?Menue=149&AnbieterID=586 [Full text of this paper is not available in the UHRA]In the EU-project FOOTPRINT three pesticide risk assessment and management tools were developed, for use at different spatial scales. The three FOOTPRINT tools share the same underlying science, based on the consistent identification of environmental characteristics driving the fate of agriculturally applied pesticides and their interpretation to parameterise state of the art modelling applications thus providing an integrated solution to pesticide risk assessment and management in the EU

Removal of Pb2+, CrT, and Hg2+ Ions from Aqueous Solutions Using Amino-Functionalized Magnetic Nanoparticles

In this paper, a circular economy approach with the adsorption and desorption of heavy metal (HM) ions—i.e., lead (Pb2+), chromium (CrT), and mercury (Hg2+)—from aqueous solutions was studied. Specific and selective binding of HM ions was performed on stabilized and amino-functionalized iron oxide magnetic nanoparticles (γ-Fe2O3@NH2 NPs) from an aqueous solution at pH 4 and 7. For this purpose, γ-Fe2O3@NH2 NPs were characterized by thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), specific surface area (BET), transmission electron microscopy (TEM), EDXS, and zeta potential measurements (ζ). The effects of different adsorbent amounts (mads = 20/45/90 mg) and the type of anions (NO3−, Cl−, SO42−) on adsorption efficiency were also tested. The desorption was performed with 0.1 M HNO3. The results showed improvement of adsorption efficiency for CrT, Pb2+, and Hg2+ ions at pH 7 by 45 mg of g-Fe2O3@NH2 NPs, and the sequence was as follows: CrT > Hg2+ > Pb2+, with adsorption capacities of 90.4 mg/g, 85.6 mg/g, and 83.6 mg/g, respectively. The desorption results showed the possibility for the reuse of γ-Fe2O3@NH2 NPs with HNO3, as the desorption efficiency was 100% for Hg2+ ions, 96.7% for CrT, and 91.3% for Pb2+

Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing

Surface-enhanced Raman spectroscopy is a powerful and sensitive analytical tool that has found application in chemical and biomolecule analysis and environmental monitoring. Since its discovery in the early 1970s, a variety of materials ranging from noble metals to nanostructured materials have been employed as surface enhanced Raman scattering (SERS) substrates. In recent years, 2D inorganic materials have found wide use in the development of SERS-based chemical sensors owing to their unique thickness dependent physico-chemical properties with enhanced chemical-based charge-transfer processes. Here, recent advances in the application of various 2D inorganic nanomaterials, including graphene, boron nitride, semiconducting metal oxides, and transition metal chalcogenides, in chemical detection via SERS are presented. The background of the SERS concept, including its basic theory and sensing mechanism, along with the salient features of different nanomaterials used as substrates in SERS, extending from monometallic nanoparticles to nanometal oxides, is comprehensively discussed. The importance of 2D inorganic nanomaterials in SERS enhancement, along with their application toward chemical detection, is explained in detail with suitable examples and illustrations. In conclusion, some guidelines are presented for the development of this promising field in the future

Superparamagnetic Spinel-Ferrite Nano-Adsorbents Adapted for Hg²⁺, Dy³⁺, Tb³⁺ Removal/Recycling: Synthesis, Characterization, and Assessment of Toxicity

In the present work, superparamagnetic adsorbents based on 3-aminopropyltrimethoxy silane (APTMS)-coated maghemite (γFe2O3@SiO2–NH2) and cobalt ferrite (CoFe2O4@SiO2–NH2) nanoparticles were prepared and characterized using transmission-electron microscopy (TEM/HRTEM/EDXS), Fourier-transform infrared spectroscopy (FTIR), specific surface-area measurements (BET), zeta potential (ζ) measurements, thermogravimetric analysis (TGA), and magnetometry (VSM). The adsorption of Dy3+, Tb3+, and Hg2+ ions onto adsorbent surfaces in model salt solutions was tested. The adsorption was evaluated in terms of adsorption efficiency (%), adsorption capacity (mg/g), and desorption efficiency (%) based on the results of inductively coupled plasma optical emission spectrometry (ICP-OES). Both adsorbents, γFe2O3@SiO2–NH2 and CoFe2O4@SiO2–NH2, showed high adsorption efficiency toward Dy3+, Tb3+, and Hg2+ ions, ranging from 83% to 98%, while the adsorption capacity reached the following values of Dy3+, Tb3+, and Hg2+, in descending order: Tb (4.7 mg/g) > Dy (4.0 mg/g) > Hg (2.1 mg/g) for γFe2O3@SiO2–NH2; and Tb (6.2 mg/g) > Dy (4.7 mg/g) > Hg (1.2 mg/g) for CoFe2O4@SiO2–NH2. The results of the desorption with 100% of the desorbed Dy3+, Tb3+, and Hg2+ ions in an acidic medium indicated the reusability of both adsorbents. A cytotoxicity assessment of the adsorbents on human-skeletal-muscle derived cells (SKMDCs), human fibroblasts, murine macrophage cells (RAW264.7), and human-umbilical-vein endothelial cells (HUVECs) was conducted. The survival, mortality, and hatching percentages of zebrafish embryos were monitored. All the nanoparticles showed no toxicity in the zebrafish embryos until 96 hpf, even at a high concentration of 500 mg/L

Le projet européen FOOTPRINT – vers des outils d'évaluation et de gestion du risque pesticides à différentes échelles

FOOTPRINT was a research project in the 6th Framework Programme which developed a suite of three pesticide risk prediction and management tools, for use by three different end-user communities: - farmers and extension advisors at the farm scale; - water managers at the catchment scale; and - policy makers/registration authorities at the national/EU scale. The tools were based on state-of-the-art knowledge of processes, factors and landscape attributes influencing pesticide fate in the environment and integrate innovative components that allow users to: - identify the dominant contamination pathways and sources of pesticide contamination in the landscape; - estimate pesticide concentrations in local groundwater resources and surface water abstraction sources; - make scientifically-based assessments of how the implementation of mitigation strategies will reduce pesticide contamination of adjacent water resources. The three tools share the same overall philosophy and underlying science and therefore provide a coherent and integrated solution to pesticide risk assessment and risk reduction at the various scales. The tools developed within FOOTPRINT allow stakeholders to make consistent and robust assessments of risk of contamination to water bodies relevant to management, mitigation and regulation (i.e. field/farm, catchment and national/EU). In particular, they allow pesticide users to assess whether their pesticide practices ensure the protection of local water bodies, and provide site-specific mitigation recommendations. The FOOTPRINT tools are expected to make a direct contribution to the revision of the Council Directive 91/414/EEC, the implementation of the Water Framework Directive and the future Thematic Strategy on the Sustainable Use of Pesticides.Non peer reviewe

FOOTPRINT, an EU project for pesticide risk assessment and management.

FOOTPRINT was a research project in the 6th Framework Programme which developed a suite of three pesticide risk prediction and management tools, for use by three different end-user communities: - farmers and extension advisors at the farm scale; - water managers at the catchment scale; and - policy makers/registration authorities at the national/EU scale. The tools were based on state-of-the-art knowledge of processes, factors and landscape attributes influencing pesticide fate in the environment and integrate innovative components that allow users to: - identify the dominant contamination pathways and sources of pesticide contamination in the landscape; - estimate pesticide concentrations in local groundwater resources and surface water abstraction sources; - make scientifically-based assessments of how the implementation of mitigation strategies will reduce pesticide contamination of adjacent water resources. The three tools share the same overall philosophy and underlying science and therefore provide a coherent and integrated solution to pesticide risk assessment and risk reduction at the various scales. The tools developed within FOOTPRINT allow stakeholders to make consistent and robust assessments of risk of contamination to water bodies relevant to management, mitigation and regulation (i.e. field/farm, catchment and national/EU). In particular, they allow pesticide users to assess whether their pesticide practices ensure the protection of local water bodies, and provide site-specific mitigation recommendations. The FOOTPRINT tools are expected to make a direct contribution to the revision of the Council Directive 91/414/EEC, the implementation of the Water Framework Directive and the future Thematic Strategy on the Sustainable Use of Pesticides.Non peer reviewe