Romanian Journal of Ecology & Environmental Chemistry最新文献_第5页

Sustainable sludge management - its use for remediation of degraded lands 可持续污泥管理-用于退化土地的修复

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.224

V. Nicorescu, Ladislau Andres, S. Negrea, D. Neidoni, C. Lehr, Corina Orha

{"title":"Sustainable sludge management - its use for remediation of degraded lands","authors":"V. Nicorescu, Ladislau Andres, S. Negrea, D. Neidoni, C. Lehr, Corina Orha","doi":"10.21698/rjeec.2020.224","DOIUrl":"https://doi.org/10.21698/rjeec.2020.224","url":null,"abstract":"The sludge resulted from the urban wastewater treatment plants, can be used, from a circular economy, as a fertilizer for agricultural and degraded lands, for horticulture and forestry. This paper aims to propose an alternative for the use of this type of sludge in a sustainable way, with a low impact on the environment. The study consisted of experiments done to recover the stabilized sludge from the urban wastewater treatment plants in the process of degraded land rehabilitation, using the energetic willow, Salix sp. The experimental results showed that the use of stabilized sludge as fertilizer for naturally and anthropogenic degraded lands determined the improvement of nutritional characteristics of the lands cultivated with Salix sp., and allowed the growth, development, and maintenance of this plant. Taking into consideration the characteristics of the cultures and the quantities of metals accumulated by Salix sp., it can be concluded that these plants were adapted to the environmental conditions and the substrate toxically composition. The results obtained on two degraded lands indicate that Salix sp. can be used for its introduction in the economic circuit, both for salty soils and ash dumps.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76829952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of wastewater quality using water quality index 用水质指标评价污水水质

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.213

C. Dinu, R. Scutariu, G. Vasile, Anda Tenea, J. Pêtre, L. Cruceru

{"title":"Evaluation of wastewater quality using water quality index","authors":"C. Dinu, R. Scutariu, G. Vasile, Anda Tenea, J. Pêtre, L. Cruceru","doi":"10.21698/rjeec.2020.213","DOIUrl":"https://doi.org/10.21698/rjeec.2020.213","url":null,"abstract":"A study for evaluating the quality of wastewater discharged into the sewerage network of Bucharest, for several economic agents with various activity profiles: a car wash, a sweet producer, and a provider of automatic access systems were presented in this paper. The study was conducted over five years (2013- 2017). The results obtained for the analyzed parameters were compared with the maximum allowed values (MAV) by the legislation in force. The results showed that for the car wash there was only one exceeding of the chemical oxygen demand (COD) parameter during the whole study period. The sweet producer and the provider of the automatic access systems evacuated wastewater with exceedances of MAV for the parameters: COD, BOD5, zinc, suspended solids, extractable substances in organic solvents, and total phosphorus. To evaluate the quality of the wastewater discharged by these two agents, the quality indices of wastewater (WWQI) were calculated. For the sweet producer, the calculated water quality indices had values between 62.4 - 92.7%, with a classification of wastewater, discharged in the quality class: marginal to good quality. For the provider of automatic access systems, the value of the quality index was between 74.2 and 85.5, the discharged wastewater being considered fair or good.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"236 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80365687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Spatio-temporal variation of nitrate and nitrite levels in groundwater samplesfrom Romania 罗马尼亚地下水硝酸盐和亚硝酸盐含量的时空变化

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.208

F. Pirvu, I. Paun, F. Chiriac, M. Niculescu, Nicoleta Vasilache, L. Pascu, T. Galaon

{"title":"Spatio-temporal variation of nitrate and nitrite levels in groundwater samples\u0000from Romania","authors":"F. Pirvu, I. Paun, F. Chiriac, M. Niculescu, Nicoleta Vasilache, L. Pascu, T. Galaon","doi":"10.21698/rjeec.2020.208","DOIUrl":"https://doi.org/10.21698/rjeec.2020.208","url":null,"abstract":"This study investigated the spatial and temporal distribution of nitrate and nitrite concentration in groundwater from different geographical regions, in Romania. A special emphasis was put on a descriptive statistical analysis of data, namely on the determination of seasonal indices during dry and wet seasons. Nitrate and nitrite concentrations were monitored in 24 groundwater sources situated in different areas,\u0000between January 2016 and February 2020. The obtained data showed that the values of nitrate concentrations were situated between 8.03 mg/L in the North-Eastern part of Romania, 6.37 mg/L in the South-Eastern part of the country, and 3.55 mg/L in the\u0000Western part towards the center of the country. Nitrite concentration values were situated under the national maximum admitted limit, 0.5 mg/L, in all the investigated areas. The obtained data shows small changes in water quality during the monitoring period, which leads to the conclusion that, in this long interval of time, there were no significant groundwater contaminations with nitrate and nitrite. For adequate control of water pollution and rigorous management of groundwater sources, seasonal indices were calculated.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91255371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of various surfactant classes on the microorganism community used for WWTP biodegradation treatment 不同表面活性剂对污水处理厂微生物群落的影响

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.226

Daniel Mitru, I. Lucaciu, M. Nita-Lazar, C. Covaliu, G. Nechifor, I. Moga, B. Marin, I. Paun, Bucharest Romania Dfr Systems Srl

引用次数: 2

HPLC detection of synthetic dyes in residual waters from wastewater treatmentusing adsorption on magnetic materials 磁性材料吸附法检测废水处理余液中合成染料

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.203

Alina Tătăruş, Claudia Maria Simionescu, R. Scutariu, V. Iancu, F. Pirvu, D. Puiu, T. Galaon

{"title":"HPLC detection of synthetic dyes in residual waters from wastewater treatment\u0000using adsorption on magnetic materials","authors":"Alina Tătăruş, Claudia Maria Simionescu, R. Scutariu, V. Iancu, F. Pirvu, D. Puiu, T. Galaon","doi":"10.21698/rjeec.2020.203","DOIUrl":"https://doi.org/10.21698/rjeec.2020.203","url":null,"abstract":"Surface water contamination by synthetic dyes generates human and wildlife adverse health effects and causes photosynthesis decrease due to intense sun-light absorption of these pollutants. 50% of total discharged industrial effluents contain azo dyes. Congo Red is a benzidine based anionic azo dye that is usually employed in rubber, paper and plastic industries. Congo Red can cause eye and skin irritation and is potentially carcinogenic in nature. This study explores the development of a new HPLC method to detect synthetic dyes in residual waters coming from wastewater treatment technologies based on magnetic material adsorption. Cobalt ferrite (CoFe2O4) and chitosan-coated cobalt ferrite (CoFe2O4-Chit) prepared by a simple co-precipitation method were tested as adsorbents for Congo Red (CR). Effect of contact time, solution pH, and initial dye concentration were studied with respect to Congo Red adsorption efficiency. The adsorption experiments were performed at pH = 4.5 and 10.8. The highest value for the removal efficiency using the magnetic material of cobalt ferrite coated with chitosan (CoFe2O4-Chit) was obtained at pH 10.8.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90711217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Acid neutralizing capacity, an important waste management parameter 酸中和能力，一个重要的废物管理参数

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.220

Georgiana Cernica, G. Catrina, Georgeta Madalina Arama, A. Serbanescu, A. Cuciureanu, B. Stanescu

引用次数: 0

Modeling of broad crested weirs by using dynamic similarity and CFD 基于动态相似和CFD的宽顶堰建模

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.212

A. Yıldız, Goknur Elif Yarbasi, A. Yarar, A. İ. Marti

{"title":"Modeling of broad crested weirs by using dynamic similarity and CFD","authors":"A. Yıldız, Goknur Elif Yarbasi, A. Yarar, A. İ. Marti","doi":"10.21698/rjeec.2020.212","DOIUrl":"https://doi.org/10.21698/rjeec.2020.212","url":null,"abstract":"Broad crested weirs and steps are used to regulate the flow in the channel, increase the water level at the upstream side, and measure the discharge. The construction of the broad crested weirs is more practical and also they are more stable compared with the other types of weirs. To serve in accordance with the purpose of their construction, broad crested weirs should be designed and built by considering certain criteria. Before the hydraulic structures are built, model experimental setups are constructed in the laboratory and problems to be encountered are tried to be determined. However, there may be differences between the structure to be built in real life (prototype) and model due to scale effect. These possible differences must be determined and necessary measures must be taken. In this study, the model and prototype of the broad crested weir are constructed in two different open channel systems by using Froude similarity. The geometric similarity between model and prototype is determined as Lr = 4. 44 experimental data were collected from model and prototype. The results obtained from the model and prototype are compared according to hydraulic similarity rules. In addition to the physical experimental setups, numerical models were created using the ANSYS Fluent for the model and prototype separately. By comparing the numerical model and physical experimental setups, optimum mesh size is tried to be determined. According to the results obtained from experimental setups, differences were observed in the position of critical flow depths and downstream water levels due to scale effects.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"55 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88469805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Elisa preliminary studies of immobilization and specific detection of bacterial strains Elisa法固定化及特异性检测菌株的初步研究

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.209

Mădălina Mihalache, A. Banciu, L. Ionescu, M. Nita-Lazar

引用次数: 0

The current state of the quality of urban soils in Bucharest 布加勒斯特城市土壤质量现状

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.225

B. Stanescu, A. Cuciureanu, Georgiana Cernica, G. Catrina

{"title":"The current state of the quality of urban soils in Bucharest","authors":"B. Stanescu, A. Cuciureanu, Georgiana Cernica, G. Catrina","doi":"10.21698/rjeec.2020.225","DOIUrl":"https://doi.org/10.21698/rjeec.2020.225","url":null,"abstract":"The soil cover is subject to anthropogenic changes as well as other geoecosystems subjected to pressures due to sources. The results are recorded for the soil cover depending on the type of anthropogenic manifestations, intensity, nature, and number of their manifestations. Moreover, the interferences with the natural landscapes intervene, and from here appear the evaluation process difficulties. In most cases, it is considered that the urban landscape is distinguished by a series of peculiarities regarding the quality of the urban hydrosphere, an atmosphere, and the biosphere, as well as a series of changes in the pedosphere, as a result of land use. Notable for the soil cover, being particularly important is the soil cover the surface of the pedosphere. The complex of ecological parameters can provide important information on the flows and balance within the ecological system. The ecological importance of urban soils has long been underestimated. Urban soils were protected only as a support for construction. It was not until the early 1970s that the first approaches to the study and classification of urban soils were initiate. We can say that in 2020 the situation is completely different, in the sense that urban soilsare studied and evaluated periodically in terms of quality.","PeriodicalId":21370,"journal":{"name":"Romanian Journal of Ecology & Environmental Chemistry","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82176103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Groundwater quality assessment for drinking and irrigation purpose using GIS, Piper diagram, and water quality index 基于GIS、Piper图和水质指数的饮用灌溉用地下水水质评价

Romanian Journal of Ecology & Environmental Chemistry Pub Date : 2020-10-14 DOI: 10.21698/rjeec.2020.214

Nicoleta Vasilache, G. Vasile, E. Diacu, C. Modrogan, I. Paun, F. Pirvu

引用次数: 3