The impact of regulatory compliance behavior on hazardous waste generation in European private healthcare facilities

Along with the increased provision of healthcare by private outpatient healthcare facilities within the EU countries, there is also an increase on waste generation from these facilities. A significant fraction of this waste is amongst the most hazardous of all wastes arising in communities, posing significant risks to people and the environment if inappropriately managed. The growing awareness that mismanagement of healthcare waste has serious environmental and public health consequences is reflected in the European waste legislation, aiming at waste prevention at the source and emphasizing the “management” aspects of the waste management process. Whether the increasingly large numbers of private healthcare facilities comply with the existing European waste legislation, and whether compliance with such legislation affects the fraction of healthcare waste classified as hazardous is an understudied subject. Using a large survey of private outpatient healthcare facilities, this study finds that although compliance with the law is far from ideal, it is the strongest factor influencing hazardous waste generation. These findings suggest that more public investments in monitoring healthcare facilities’ compliance with the law in EU countries is warranted, along with increased efforts to raise the facilities’ awareness of the cost savings brought about by compliance with the existing healthcare waste legislation

Anticipating the location of a waste collection point : an application based on Portugal

We study the optimal location of a waste facility in a horizontally differentiated duopoly where firms choose their location and price. The policymaker decides the location of a waste facility targeting social welfare maximization. Consistent with the observation of the location decisions of waste facilities in Portugal, we show that the optimal location of a waste facility is never in the city center under partial expost regulation. Ex-ante regulation ensures the highest level of social welfare, but from a theoretical point of view, it requires a waste facility located in the city center. A robustness check is then provided to justify that, in actual regulatory practice, a first-mover regulator maximizes social welfare without necessarily imposing the installation of a waste facility in the city center.info:eu-repo/semantics/publishedVersio

Does final energy demand in Portugal exhibit long memory? A fractional integration analysis

In this paper, we measure the degree of fractional integration in final energy demand in Portugal using an ARFIMA model with and without adjustments for seasonality. We consider aggregate energy demand as well as final demand for petroleum, electricity, coal, and natural gas. Our findings suggest the presence of long memory in all of the components of energy demand. All fractional-difference param- eters are positive and lower than 0.5 indicating that the series are stationary, although with mean reversion patterns slower than in the typical short-run processes. These results have important implications for the design of energy policies. As a result of the long-memory in final energy demand, the effects of temporary policy shocks will tend to disappear slowly. This means that even transitory shocks have long lasting effects. Given the temporary nature of these effects, however, permanent effects on final energy demand require permanent policies. This is unlike what would be suggested by the more standard, but much more limited, unit root approach, which would incorrectly indicate that even transitory policies would have permanent effects.info:eu-repo/semantics/publishedVersio

Surface vs. groundwater: the effect of forest cover on the costs of drinking water

Forests worldwide provide a variety of ecosystem services including carbon sequestration, soil protection and water purification. In particular, the minimal use of pesticides and fertilizers in forest operations coupled with the tree root system are associated with higher drinking water quality. However, forest coverage is expected to have a more influential impact in groundwater quality rather than surface as well as, consequently, on drinking water treatment costs. This study uses cross sectional data at firm level to assess the marginal effect of forest cover on drinking water treatment costs for the case of Portugal, the first of its kind for the country. Our analysis makes use of a range of GIS and spatial variables which capture the heterogeneity in local forest coverage. The results obtained suggest the existence of a positive and significant effect of local forest cover on water treatment cost savings of 0.056%. However, this effect applies to firms extracting water from groundwater intakes. Neighboring measures of forest coverage have a greater impact on costs from surface water firms. The crucial role of local forest coverage through groundwater provision relates to a problem of intertemporal variation of those costs. Given the expected impact of climate change on precipitation in some regions where drinking water is mostly supplied by groundwater intakes, and since around 97% of forest land is privately owned, these results may suggest that appropriate incentives (e.g., payments for ecosystem services) could contribute to ensuring the sustainable use of water and forest resources.publishe

Genotypic and phenotypic traits of blaCTX-M-carrying Escherichia coli strains from an UV-C-treated wastewater effluent

Wastewater treatment plants (WWTPs) are relevant sources of antibiotic resistance into aquatic environments. Disinfection of WWTPs’ effluents (e.g. by UV-C irradiation) may attenuate this problem, though some clinically relevant bacteria have been shown to survive disinfection. In this study we characterized 25 CTX-M-producing Escherichia coli strains isolated from a WWTP’s UV-C-irradiated effluent, aiming to identify putative human health hazards associated with such effluents. Molecular typing indicated that the strains belong to the phylogroups A, B2 and C and clustered into 9 multilocus sequence types (STs), namely B2:ST131 (n ¼ 7), A:ST58 (n ¼ 1), A:ST155 (n ¼ 4), C:ST410 (n ¼ 2), A:ST453 (n ¼ 2), A:ST617 (n ¼ 2), A:ST744 (n ¼ 1), A:ST1284 (n ¼ 3) and a putative novel ST (n ¼ 3). PCR-screening identified 9 of the 20 antibiotic resistance genes investigated [i.e. sul1, sul2, sul3, tet(A), tet(B), blaOXA-1-like, aacA4, aacA4-cr and qnrS1]. The more prevalent were sul1, sul2 (n ¼ 15 isolates) and tet(A) (n ¼ 14 isolates). Plasmid restriction analysis indicated diverse plasmid content among strains (14 distinct profiles) and mating assays yielded cefotaxime-resistant transconjugants for 8 strains. Two of the transconjugants displayed a multi-drug resistance (MDR) phenotype. All strains were classified as cytotoxic to Vero cells (9 significantly more cytotoxic than the positive control) and 10 of 21 strains were invasive towards this cell line (including all B2:ST131 strains). The 10 strains tested against G. mellonella larvae exhibited a virulent behaviour. Twenty-four and 7 of the 25 strains produced siderophores and haemolysins, respectively. Approximately 66% of the strains formed biofilms. Genome analysis of 6 selected strains identified several virulence genes encoding toxins, siderophores, and colonizing, adhesion and invasion factors. Freshwater microcosms assays showed that after 28 days of incubation 3 out of 6 strains were still detected by cultivation and 4 strains by qPCR. Resistance phenotypes of these strains remained unaltered. Overall, we confirmed WWTP’s UV-C-treated outflow as a source of MDR and/or virulent E. coli strains, some probably capable of persisting in freshwater, and that carry conjugative antibiotic resistance plasmids. Hence, disinfected wastewater may still represent a risk for human health. More detailed evaluation of strains isolated from wastewater effluents is urgent, to design treatments that can mitigate the release of such bacteria.N/