Martina Pini

Environmental assessment of a bottom-up hydrolytic synthesis of TiO2 nanoparticles

A green metrics evaluation of the bottom-up hydrolytic sol–gel synthesis of titanium dioxide (TiO2) nanoparticles has been performed by following two different approaches, namely, EATOS software and LCA methodology. Indeed, the importance of engineered nanomaterials is increasing worldwide in many high-technological applications. Due to the as yet completely un-established environment and human health impact of nano-sized materials, the possibility of at least choosing a greener synthetic strategy through an accurate comparison of detailed environmental assessments will soon be of absolute importance in both the small and large scale production of these advanced inorganic materials. The present LCA study has been carried out following an ecodesign approach, in order to limit the environmental impacts and protect human health. The results of LCA analysis suggest that the highest environmental impact is mainly due to energy and the titanium isopropoxide precursor used in the synthesis process. Concurrently, software EATOS has been employed to calculate the environmental parameters that account for the environmental and social costs related to all the chemicals involved in the analyzed synthesis. As the EATOS approach is based purely on synthetic chemical mechanism considerations, thus neglecting any energy contributions, and its results cannot be directly compared to those arising from LCA analysis. However, similar and comparable outcomes are obtained by simply neglecting the energy contributions, broadening the application fields of the combined EATOS-LCA approach to the inorganic synthesis of engineered nanomaterials, highlighting the great potential of their synergy.

Human health characterization factors of nano-TiO2 for indoor and outdoor environments

PurposeThe increasing use of engineered nanomaterials (ENMs) in industrial applications and consumer products is leading to an inevitable release of these materials into the environment. This makes it necessary to assess the potential risks that these new materials pose to human health and the environment. Life cycle assessment (LCA) methodology has been recognized as a key tool for assessing the environmental performance of nanoproducts. Until now, the impacts of ENMs could not be included in LCA studies due to a lack of characterization factors (CFs). This paper provides a methodological framework for identifying human health CFs for ENMs.MethodsThe USEtox™ model was used to identify CFs for assessing the potential carcinogenic and non-carcinogenic effects on human health caused by ENM emissions in both indoor (occupational settings) and outdoor environments. Nano-titanium dioxide (nano-TiO2) was selected for defining the CFs in this study, as it is one of the most commonly used ENMs. For the carcinogenic effect assessment, a conservative approach was adopted; indeed, a critical dose estimate for pulmonary inflammation was assumed.Results and discussionWe propose CFs for nano-TiO2 from 5.5E−09 to 1.43E−02 cases/kgemitted for both indoor and outdoor environments and for carcinogenic and non-carcinogenic effects.ConclusionsThese human health CFs for nano-TiO2 are an important step toward the comprehensive application of LCA methodology in the field of nanomaterial technology.

Environmental and human health assessment of life cycle of nanoTiO2 functionalized porcelain stoneware tile

Recently, there has been a rise in the interest in nanotechnology due to its enormous potential for the development of new products and applications with higher performance and new functionalities. However, while nanotechnology might revolutionize a number of industrial and consumer sectors, there are uncertainties and knowledge gaps regarding toxicological effects of this emerging science. The goal of this research concerns the implementation into Life Cycle Assessment (LCA) of preliminary frameworks developed to evaluate human toxicity and exposure factors related to the potential nanoparticle releases that could occur during the life cycle steps of a functionalized building material. The present LCA case study examines the ecodesign of nanoTiO2 functionalized porcelain stoneware tile production. The aim of this investigation is to manufacture new eco-friendly products in order to protect human health and ecosystem quality and to offer the market, materials with higher technological properties obtained by the addition of specific nanomaterials.

The life cycle approach as an innovative methodology for the recovery and restoration of cultural heritage

Purpose – In this paper, of exploratory character, the purpose of this paper is to propose the analysis of the life cycle for assessing the environmental, economic, and social impact in the activity of recovery, restoration, and valorization of Cultural Heritage. Design/methodology/approach – The analysis protocol is applied to the case of recovery and restoration processes and then outlining the salient features of what may become a model of Cultural Heritage Life Cycle Management (CH-LCM). Findings – The authors propose the approach of the life cycle, normally used to assess the impact of materials, processes or products, to the management of cultural heritage as an innovative methodology with great potential. Originality/value – The methodology for this sector is highly innovative, especially in its interdisciplinary approach, through the use of different technical, historical, and economic skills which can provide the tools for the preparation of a management plan according to the logic of the life cycle.

Environmental and social impact assessment of cultural heritage restoration and its application to the Uncastillo Fortress

PurposeThe restoration of cultural heritage, like in other production sectors, requires an innovative approach to integrate the principles of sustainability into processes. The main purpose of this article is to demonstrate that an integrated environmental and social impact assessment of restoration works can be conducted through the use of an operational model, which for the first time is applied to a real case of public private partnership (PPP) in the cultural heritage sector.MethodsThe evaluation of the proposed strategy is carried out through an approach based on life cycle assessment (LCA) methodology, which takes into account environmental and social aspects. An environmental LCA analysis was conducted on a case study, assessing the effects of an intervention of a historical site that was restored to become a museum. The social effects arising from the intervention were then examined and evaluated with an approach based on the key points of the UNEP/SETAC S-LCA guidelines involving stakeholders, social topics, and performance indicators, thus defining a reference framework that can be adapted to the case study.Results and discussionThe environmental LCA analysis identified the phases of the restoration with the most impact as those related to the reconstruction of materials and elements that was necessary when the originals were too damaged to be recovered. The use and periodic replacement of electronic equipment in the museum also had a significant impact in the use phase of the buildings. The evaluation method for the social aspects scored each social theme, outlining the benefits produced by the restoration. The results show that the restoration had several positive effects, particularly in terms of social issues related to the local community.ConclusionsThe environmental LCA assessed the advantages and the hotspots in the recovery and reuse of heritage buildings. The framework developed from the guidelines for the S-LCA of products is a suitable tool for the evaluation of social aspects related to cultural heritage interventions, after adapting the methodology of S-LCA to the context and to the reference case study. In some cases, evaluations are based on subjective judgments, but the results provide a reliable overview of the social impact generated.

Environmental assessment of different synthetic strategies towards engineered oxide nanomaterials

L is a potential renewable raw material for synthesis of various value-added chemicals that can substitute fossil-derived consumer products. A huge amount of lignin is produced as a by-product of paper industry while cellulosic components of plant biomass are utilized for the production of paper pulp. In spite of vast potential, lignin remains the least exploited component of plant biomass due to its extremely complex cross-linked three dimensional structures. Nature has provided a few enzymes known to degrade lignin biomass; however, till date there are no efficient processes available for enzymatic degradation of these extremely complex molecules. Development of effective lignin degrading enzymes may be possible by amending activity of some currently available enzymes, using protein engineering techniques. Directed evolution is one such protein engineering tool that could be used for this purpose but application of this technique for improving efficiency of potential lignin degrading enzymes is limited due to lack of an effective high throughput screening method. With an objective of detecting the Lignin Degradation Products (LDPs), we identified E. coli promoters that are up-regulated by vanillin and a few other potential lignin degradation products. 7 potential promoters were identified by RNA-Seq analysis of E. coli BL21 cells pre-exposed to a sub-lethal dose of vanillin for different exposure times. A ‘Very Green Fluorescence Protein’ (vGFP) gene was recombinantly placed under control of these promoters within a customized plasmid and transformed in E. coli BL21 cells to generate the whole cell biosensors. Fluorescence of two biosensors enhanced significantly while grown in the presence of the lignin degradation products (e.g. vanillin, acetovanillone and guaiacol), which was detected by Fluorescence-Activated Cell Sorting (FACS) analysis. The sensors did not show any increase of fluorescence by the presence of lignin, lignin model compounds or non-specific chemicals. The fluorescence change by the presence of LDPs was dose-dependent; one sensor can detect vanillin at the concentration as low as 0.5mm.