Lembit Nei

Simultaneous determination of fluoroquinolones, sulfonamides and tetracyclines in sewage sludge by pressurized liquid extraction and liquid chromatography electrospray ionization-mass spectrometry.

A new scheme for the quantitative determination of traces of fluoroquinolones (FQs), tetracyclines (TCs) and sulfonamides (SAs) in sewage sludge was developed. The compounds were simultaneously extracted from sewage sludge by pressurized liquid extraction (PLE). A novel and effective method for PLE was developed. Solid-phase extraction was used for cleaning up the extracts. Identification and quantification of the compounds was done using high-performance liquid chromatography with electrospray ionization mass spectrometry in selected reaction monitoring mode. The best recovery of FQs and TCs was obtained by using hydrophilic-lipophilic balance cartridges, recoveries ranged 59% for norfloxacin to 82% for ofloxacin and 95% for doxycycline; for SAs strong cation-exchange cartridges were more efficient, recoveries were 96% for sulfamethoxazole and 43% for sulfadimethoxine. Limit of quantification ranged from 0.1 ng/g for SAs to 160 ng/g for tetracycline. Method precision for TCs was 5.06% and 1.12%, and for SAs 0.43% and 2.01%. FQs precision ranged from 0.77% to 1.89%.

Presence of fluoroquinolones and sulfonamides in urban sewage sludge and their degradation as a result of composting

The concentrations of some widely used pharmaceuticals, namely fluoroquinolones (ciprofloxacin C17 H18FN3O3, norfloxacin C17 H18FN3O3 and ofloxacin C18 H20FN3O4 and sulfonamides (sulfadimethoxine C12 H14N4O4s and sulfamethoxazole C10 H11N3O3S were determined in urban sewage sludge utilized for making compost. The levels of degradation of these pharmaceuticals resulting from sludge treatment were assessed. The concentrations of the studied pharmaceuticals sufficiently varied both in sewage sludge and in compost and due to this phenomenon the possible danger resulting from the presence of pharmaceuticals in sewage sludge, used for composting, can not be ignored. The concentrations of the studied pharmaceuticals were lower in compost, if compared to the relevant concentrations in sewage sludge. The highest pharmaceutical concentration in sewage sludge — 426 μg/kg — was detected in the case of ciprofloxacin. The highest concentrations present in compost were 22 μg/kg of norfloxacin and 20 μg/kg of ciprofloxacin. Results show that before using the sewage sludge for making compost or before using the compost a fertilizer for food plants, they should be carefully tested against the content of commonly used pharmaceuticals.

Plant uptake of some pharmaceuticals commonly present in sewage sludge compost

The application of sewage sludge compost as a fertilizer can be a source of the contamination of food plants by pharmaceutical products. In this study the uptake of ciprofloxacin, ofloxacin, norfloxacin, sulfadimethoxine and sulfamethoxazole from soil into potato was demonstrated. The concentrations of the studied pharmaceuticals were of considerable magnitude in the plant samples, if compared to their concentrations in soil.

Domestic organic waste treatment through vermitechnology

Vermitechnology has become a popular method for the safe and cost-effective treatment of domestic and agricultural solid wastes. Since 2010, a remarkable number of excellent papers have been published in Waste Management & Research on this environmentally friendly transformation of energy-rich organic matter into humus-like product. Among these, the work of Rajpal et al. (2010), is of special interest, as the indigenous earthworm species Perionyx sansibaricus and Perionyx excavates are successfully used in India instead of exotic species for vermicomposting. These authors claim that the vermicomposting process is limited, because the users have to purchase non-native earthworm species (usually Eisenia fetida) and if they are lost for some reason, they have to be purchased again. In this study it was shown that the performance of indigenous species was comparable with that of the exotic species, although the exotic species degraded the organic matter faster. However, after continuous application of vermicompost produced by Eisenia fetida, the local earthworm species vanished from that area. Kurian and Velmourougane (2010) have shown in India, that both exotic (Eudrilus eugeniae) and native earthworm (Perionyx ceylanesis) species can be used in vermicomposting, and that the efficiency of composting with indigenous species was found to be higher in their study. In Estonia, Eisenia fetida is one of the native earthworm species inhabiting manure and compost piles. Vermicomposting has not found wide usage in Nordic countries, due to insufficient efficiency at low and moderate temperatures. However, on-site small-scale vermicomposting of kitchen waste could be a reasonable way of obtaining valuable fertilizer for the gardens and small fields of private households. We conducted a comparable on-site vermicomposting experiment in the range of temperatures from 16 to 31 °C, using kitchen waste that consisted of fresh and boiled fruits, vegetables and plants, coffee grounds and teabags, eggshells, kitchen paper, milk and meat, etc. As a result of this study, it may be concluded that on-site vermicomposting using Eisenia fetida is a beneficial way of treating kitchen waste in Estonia. The biomass of the earthworms doubled during 120 days, the pH increased from 5.4 to 8.3, the change in the content of total phosphorous increased from 0.3 to 0.7%, and a two-fold reduction of organic carbon was observed. These results are in good agreement with the results obtained by Rajpal et al. and they clearly show that there is no need to adapt non-native earthworm species for vermicomposting in Estonia. Moreover, the legislation of Estonia determines that the release of non-native species into the wild should be fully excluded. Vermicomposting is an efficient way of reusing organic waste materials and indigenous earthworm species should be preferably used for this purpose. Most of the relevant studies have been carried out in countries with a warm climate. Novel intelligent protocols should be developed, so that this attractive approach could also be widely applied in regions with a moderate climate. We propose that the editors encourage the scientists dealing with vermicomposting to publish the results of their studies in Waste Management & Research more actively.

Mackereth Oxygen Sensor: Measurement Uncertainty

The measurement of oxygen concentrations in natural and waste water is a major requirement of environmental monitoring. Since 1953 amperometric membrane-covered sensors are commonly used for dissolved oxygen measurements. The device consists of a two-electrode electrochemical cell with a thin gas-permeable membrane separating the electrodes and the electrolyte solution from the analyzed media. The reliability of dissolved oxygen analysis has been extensively discussed in the relevant literature. There is a remarkable disagreement between the values of measurement uncertainty of dissolved oxygen measurement reported by different authors. We draw out the main uncertainty sources and show the potential measures for increasing the reliability of continuous electrochemical oxygen measurements, carried out in environmental monitoring and waste water treatment.

Sewage Sludge Composting and Pharmaceuticals

This study examines the relationship between climate change and undernourishment and its negative impact on child health. The focus of this study is Palghar District (which was formed on August 1, 2014, in State of Maharashtra, India). This paper examines the efficacy of the role of healthy government initiatives and their awareness among people in overcoming the adverse effects of climate-change. The study is based on interviews with the District Collector, various government officials and anthropologists working in the area, as well as secondary data collected from the Palghar District Collectorate. As the data made available by the government were limited, the study is unable to supply extensive information about such aspects as the beneficiaries of various welfare schemes, project costs and cost analysis. Palghar district has reported 64 per 1000 child deaths and 44 per 1000 infant deaths between April and October, 2016. The researcher tried to find links between various potential variables and child mortality in this administrative region. The researcher hopes that by giving voice to a localised issue and discussing possible solutions for curbing the problem of child mortality due to undernourishment, it may be possible to find a long-term and comprehensive model for a solution for the same problem around the world.In modern conditions of globalization, the quality of static data of foreign economic relations of the country plays an important role in decision-making about the foreign economic sphere of the country. This is without their quality leading to wrong static analysis of the indicators of foreign economic relations and methods of evaluation. As a result, it is impossible for correct decision not to be made by the government. Also, there are questions about what are the important priorities in the development of foreign economic relations of the country. According to the analysis of static indicators of foreign economic relations of Syria before and during the crisis, we noted that there was a deterioration of all indicators of foreign economic relations due to armed conflict. This includes the increase in the external debt 2.75 times in 2014 compared with the period before the crisis, the decline in exports and imports, and the improvement of egovernment. In addition, work without high-quality cannot control foreign trade transactions.Liability of the custodian or custodian body for the damage caused by the persons totally divested from the ability to act due to mental disability is a kind of liability for the damage caused by the actions of the other person. In this case, his/her custodian or custodian body that is liable for his/her supervision shall be liable even for the damage caused by the person with mental disabilities. Obligation for supervision and care of the custodian or custodian body for the person with mental disabilities shall be the reason based on which they should respond in cases when the person with mental disabilities causes a damage to the third person. In order this kind of liability to come into consideration, in advance, there should be met some conditions as follows: 1. The damage is caused, 2. The damage is caused by the person that is incapable to judge and by the person who is under custody, 3. The damage has been caused since the custodian has not exercised adequately the supervision function as required according to the Law, decision of a body or any contract. These conditions should be fulfilled together in order that this kind of liability to come into consideration. Theoretical treatments regarding these kinds of liabilities, not in all cases, have brought the due clearance. In theoretical treatments of various authors that have treated this kind of liability there are presented dilemma which require a different analysis and approach in order that there to be identified some cases that have been left untreated until nowadays. Those authors, in their theoretical treatments, have ascertained that the custodian or custodian body shall be released from the liability for the damage caused by the person with mental disabilities or with mental slowdown development or any other circumstance according to which they could not judge his/her actions, if they can prove their innocence whether they have exercised adequately the supervision towards the person with mental disabilities or with mental slowdown development but the same authors have not given further explanations that who will be liable in such cases if the person with mental disabilities does not have economic conditions to make the compensation of the damage. This issue is regulated with legal framework of some countries treated in this paper. We have done this comparative analysis between the legal framework of these countries with the purpose of identifying the similarities and differences between them in regulating this liability. Even that there are some differences in legal determinations, we should say that Kosovo, Croatia, Serbia, Albania, France, Italy, Germany and Spain have approximately similar regulation regarding this liability since all these countries cover this kind of liability with their legal framework.This study is an effort to characterize the legal and social aspects of the polish regulations relating to the employment of people with disabilities in sheltered conditions. In Poland, the role of activation of the disabled in the protected labor market performs three types of operations: sheltered workshops, factories professional activity, and social co-operation. Authors discuss the formal requirements to obtain the status, specific rights, and the obligations of employers who are employing the establishment of protected or reinsured activity. The research included in the study was supplemented by an analysis of available statistical data based on the number of operators protected labor market and the number of disabled people employed in these workplaces.Starting from 1st May, 2004 countries of European Fifteen have gradually opened their labour markets for the new EU members, including the Poles. The first to take this step was Great Britain, Ireland and Sweden, the last - Germany and Austria. For the new EU citizens, emerging opportunities were connected with benefits and wide possibilities, but also with limitations and adaptation difficulties. They had to deal with the language barrier as much as the different culture, accepted behaviours, traditions, work culture and model of spending leisure time. Mentality of migrants – whether they were able or not to immerse into the “new” – had impact on finding themselves in another environment. Most of those, who left Poland did not plan to settle, they were leaving “for some time”, temporarily. Mentally, they were still connected with previous place of residence, more interested in environment left behind than new one. Such behaviour was not conducive to adaptation; on the contrary, it made adaptation harder. Migrants through listening to Polish radio, watching Polish television stations, using the Polish Internet portals and reading national press, separated themselves from the new environment. All of these was due to the assumption that engaging in new place has no point since their stay is only temporary. Their attitude to the kind of work and workplace was similar. Majority of migrants from the EU-8 countries was taking up secondary employment, regardless of educational background. Wages comparable with Polish were supposed to compensate depreciation on the labour market. A wide spectrum of adaptation problems of Polish migrants is an issue raised in reports prepared by specialized research institutions, the Polish Ministry of Foreign Affairs and Polish Community organisations.The system of support for women within the framework of the social policy of the Second Polish Republic included: the adequate regulations of work legislation, the rules of social insurance, the activities towards the maternity protection of the insured and, finally, social services directly or indirectly provided to women by the central as well as local governments. These activities were extensive and, in many cases, very modern. What is more, they were directed towards solving the most important social problems of women. However, rather than common, the scope of those activities was very limited and selective. Moreover, the implementation of those activities was not always in accordance with the plans and expectations of their authors. From the point of view of the existing social needs, the most advanced solutions were those which resulted from a privileged position of women in the work legislation and the system of health insurance. The problem of the insignificant influence always had its roots in the socio-professional structure of the country. Only women in employment or covered by the insurance could receive the benefits. For the rest the offer was no longer that beneficial.In a society genetically endowed with great cognitive potential, the paradigmatic failure of the post-communist education system divide young people into three categories: young elitists who join foreign universities and companies, well-prepared young people eager to study in their country and young NEETs. The increasing percentage of the latter ones is confirmed by the national results obtained in the PISA tests and high school dropout rates. No community in this world can be strong when the investment in education lacks. Non-aligned job policies to educational ones will give birth to worrying imbalances, highlighting the phenomenon of migration. Demographic decline and the lack of strategies to stimulate birth rate will increase the impossibility to ensure generational change within the active population and all these will lead to a block of the pension system. Romania, in the next 20 years will follow the model of the European countries, which face labor importation and the migration of non-European capital. Are there any solutions to counterbalance these trends? This is the question which, the whole rethink of theoretical-methodological analysis of some policies meant to give value to the huge Romanian qualitative human force, deprecated within the large globalization, is based on.The essay deals with the difficult relationship between fiscal responsibility and representation: it seems that the traditional rule “no taxation without representation” is less and less true, as the responsibility of the representatives, be they those of the national parliament or of the representative bodies of local institutions, is no longer a real guarantee. The case of the Italian system is significant: local taxes have been interpreted in a very singular way by the constitutional case law, as the representatives’ responsibility connected with local government levies is limited to the determining only of certain aspects of the fiscal phenomenon. One first goal is therefore to analyse the atypical fiscal and financial responsibility of local administrators. But a specific phenomenon of the Italian Regions with a special level of autonomy deserves attention. These special Regions have negotiated with the central government a specific regime: since the constitutional implementation process of 2009, they dispose of undeniably high percentages of their territories’ tax revenue. The profiles of derived finance have been eliminated and it has been decided to return to the self-financing model, understood as the prevailing allocation in a fixed share of tax revenues produced within the territory. The case of the special regional revenues of Trentino-Alto Adige is a peculiar one and it is specifically studied in this essay. This work discusses the question of representation regarding tax revenues in a different way, based on a particular type of relation between the wealthproducing context and the institutions.Today, internet plays an indisputable role as a means of communication, information flow, and as a point of meeting the needs of a growing number of people. The authors noted more and more important role that mass communication plays in social media. This article presents various definitions of the phenomenon and the proposed typology, and threats which entails using either incompetent social media today. This article is intended to facilitate the communication process for researchers, sociologists, media experts, and people interested in the study of the phenomenon of online communication.A change depending on the time of the flood wave moving in a stream using flood routing approach is examined. Flood routing of flood discharge along the river with their account and calculating the changes in the water level of flood protection structure size is determined to safety. The aim of this study, Sutculer flood event will be modeled by Genetic Expression Programing (GEP) method. The GEP method makes use of few hydrologic parameters such as inflow, outflow, and time. Simulation results indicate that the proposed a predictive model is an appropriate for the flood routing. Case study is presented to demonstrate that the GEP model is an alternative in implementation of the Muskingum model.