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Science of the Total Environment

Andrey A Toropov, Alla P Toropova
The interpretation of the mutagenic potential of silver nanoparticles as a mathematical function of (i) dose; (ii) coating; and (iii) type of mutagenicity (TA98 and TA100) gives quantitative models with good statistical quality. So-called quasi-SMILES are used to represent examined objects (silver nanoparticles under different conditions) for building up models. Simplified molecular input-line entry systems (SMILES) is a well-known sequence of symbols for representation of the molecular structure. Quasi-SMILES is a similar sequence of symbols for representation of experimental conditions...
May 10, 2019: Science of the Total Environment
Kristina Tolić, Dragana Mutavdžić Pavlović, Dolores Židanić, Mislav Runje
Nitrofurantoin is nitrofuran antibacterial drug that is most used as a veterinary pharmaceutic compound. This compound, as well as other pharmaceuticals can greatly affect the environment, the soil and organisms in it and pollute aquatic ecosystems. Since it has been used for only a few decades, knowledge of their fate and behaviour in the environment is still limited. Because of that, the aim of this study was to experimentally determine the Kd values of nitrofurantoin in seven different natural soil and seven different sediment samples with different physico-chemical properties...
May 9, 2019: Science of the Total Environment
Josu Narbarte-Hernández, Eneko Iriarte, Carlos Rad, Ángel Carrancho-Alonso, Penélope González-Sampériz, Leonor Peña-Chocarro, Juan Antonio Quirós-Castillo
Evolution and change in agricultural practice is a major factor in the codification of social relations and represents one of the main resources employed by human societies to establish a durable relationship with their environment. Using a multi-proxy integrated approach, this paper seeks to decipher the long-term dynamics that have shaped agricultural landscapes in the Basque Country (N Spain). Social and economic indicators (archival records, toponymy and oral sources) are used along with geological core sampling (geochemistry, magnetic, palynological and carpological analyses) to reconstruct a diachronic sequence of human settlement and agricultural management in the village of Aizarna over the last ~1500 years...
May 9, 2019: Science of the Total Environment
Vincenzo Del Gaudio, Pierpaolo Pierri, Nicola Venisti
One basic element for seismic hazard assessment is the empirical definition of ground motion prediction equations (GMPE) to estimate shaking expected for earthquakes of given magnitude and distance. GMPEs are calibrated from data of accelerometric stations, distinguishing among site categories of different lithological type (e.g. hard rocks, more or less stiff soils) expected to cause different levels of ground motion amplification. Such a site classification is commonly based on geological observations and/or geophysical parameters like the mean propagation velocity of seismic waves through subsoil surficial layers...
May 9, 2019: Science of the Total Environment
Hahyun Park, Whasun Lim, Seungkwon You, Gwonhwa Song
Fenbendazole, is an effective benzimidazole anthelmintic that prevents parasite infection in both human and veterinary health care. Although the well-known and effect of benzimidazole was recently shown to have a broad spectrum of biological abilities, such as anticancer and anti-inflammation activities, the mechanism of benzimidazole's antiproliferative effect via cell signaling pathways and its role in preimplantation has not been studied. Therefore, the purpose of this study was to determine the effects of fenbendazole on porcine trophectoderm and luminal epithelial cells...
May 9, 2019: Science of the Total Environment
Jiao Ma, Lei Zhang, Lan Mu, Kongyun Zhu, Aimin Li
As a prerequisite additive, bulking agent played an essential role on organic wastes biodrying by affecting the organics degradation and microbial consortia. In this study, a series of experiments were conducted to explore the relationships among the type of bulking agents, organics degradation and microbial community evolution. In line with the excellent physiochemical properties, corncob was found to be more desirable for biodrying with more water removal (62.13% vs. 53.70% for sawdust and 51.72% for straw) and higher energy efficiency...
May 9, 2019: Science of the Total Environment
Jingwei Zhang, Jianmin Chen, Chaoyang Xue, Hui Chen, Qiang Zhang, Xingang Liu, Yujing Mu, Yitian Guo, Danyun Wang, Yong Chen, Jialin Li, Yu Qu, Junling An
The Weather Research and Forecasting/Chemistry (WRF-Chem) model updated with six potential HONO sources (i.e., traffic, soil, biomass burning and indoor emissions, and heterogeneous reactions on aerosol and ground surfaces) was used to quantify the impact of the six potential HONO sources on the production and loss rates of OH and HO2 radicals and the concentrations of secondary organic aerosol (SOA) in the Beijing-Tianjin-Heibei (BTH) region of China during a winter heavy haze period of Nov. 29-Dec. 3, 2017...
May 9, 2019: Science of the Total Environment
Wanrong Hu, Yi Xie, Shan Lu, Panyu Li, Tonghui Xie, Yongkui Zhang, Yabo Wang
Nitrogen-doped carbon (NC) materials have been extensively investigated for their great potential applications in adsorption, catalysis, etc. Herein, we report a facile one-step pyrolysis process for NC synthesis using abundant bio-waste of excess sludge as carbon source and cheap precursor of urea as nitrogen source. The developed materials were evaluated for organic pollutants removal through adsorption and catalytic oxidation by peroxymonosulfate (PMS) activation. Experimental results demonstrated that nitrogen doping significantly affected the elemental composition and microstructure of NC, leading to improved adsorption capability as well as PMS activation activity for methylene blue (MB) removal...
May 9, 2019: Science of the Total Environment
Xuehua Ye, Leilei Li, Carol C Baskin, Jerry M Baskin, Juan Du, Zhenying Huang
Sand burial plays important role in the life history of species in sandy areas of arid and semi-arid temperate regions, by affecting seed germination, seedling growth and survival and plant community. However, few studies have focused on the effects of sand burial on the dynamics of seed dormancy in such areas. In this study, seed germination characteristics of Allium tenuissimum, a dominant perennial herb in the dune ecosystem in Ordos Plateau in northern China, was investigated. Dormancy dynamics were monitored for seeds buried at sand depths of 0, 2 and 5 cm in the natural habitats for 13 months...
May 9, 2019: Science of the Total Environment
Yangyang Chu, Xinyu Zhang, Weixiao Chen, Fan Wu, Peng Wang, Yu Yang, Shu Tao, Xilong Wang
Hybrid microsphere of polyacrylic acid (PAA) grafted TiO2 /SiO2 /Fe3 O4 (TSF-PAA) was synthesized via coating polyacrylic acid on the core-shell-shell TiO2 /SiO2 /Fe3 O4 (TSF) structure with the aid of plasma technique. The synthesized microsphere was applied to remove Pb2+ from water. The state-of-the techniques including TEM, FTIP, TGA, and XPS were used to characterize the morphology and the surface functionalities of the microsphere and confirmed that PAA was successfully grafted on TSF surfaces and active functional groups were introduced...
May 8, 2019: Science of the Total Environment
Jiaqing Xiong, Shichun Yu, Yisong Hu, Yuan Yang, Xiaochang C Wang
Wastewater is increasingly recognized as a valuable resource rather than as a waste, motivating a shift in the perspective of wastewater treatment from pollution control to resource recovery. This study proposes the recovery of organic matter from domestic wastewater for the production of bioenergy through a novel process of wastewater preconcentration based on dynamic membrane filtration (DMF). The selection of a dynamic membrane (DM) supporting material, the preconcentration performance of organics, and the biomethane production potential (BMP) of the organic concentrate were investigated...
May 8, 2019: Science of the Total Environment
Yi-Bo Zhao, Guang-Zhou Wu, Yong-Xi Gong, Ming-Zheng Yang, Hong-Gang Ni
Electronic commerce has been becoming the new driver of the retail industry. The large-scale expansion of electronic commerce with additional packaging certainly increases stress on the environment. However, a comparative analysis of environmental impacts of electronic commerce and conventional retail trade channels is unavailable. In this study, an Average Package Difference Model (APDM) was developed to evaluate CO2 emissions difference via the two retail channels in Shenzhen, China based on a life-cycle perspective...
May 8, 2019: Science of the Total Environment
Shuo Li, Yongdeng Lei, Yaoyao Zhang, Jiangang Liu, Xiaoyu Shi, Hao Jia, Chong Wang, Fu Chen, Qingquan Chu
In order to feed a population of nearly 1.4 billion people with limited arable land resources, China's high crop production has been maintained by an intensive cropping system with excessive inputs of chemical fertilizers, resulting in high environmental costs. This study attempted to explore the reasonable balance between yield increase and nitrogen (N) inputs in the intensive wheat-maize cropping system in the North China Plain, which is one of the most important grain production regions in China. Based on yield simulations with the DSSAT-CERES-Wheat and DSSAT-CERES-Maize models and a household survey of 241 farmers' fields, we conducted a coupled analysis of the regional crop yields, N fertilizer inputs, and farmers' technical conversion efficiency with respect to winter wheat and summer maize production in four representative study areas...
May 8, 2019: Science of the Total Environment
Christian Sonne, Rune Dietz, Sophia V Hansson, Jens Søndergaard, Jean-Pierre Desforges, Aage K O Alstrup
Japans' decision to withdraw from the International Whaling Commission and reinstate commercial hunting on minke, sei and Bryde's whales has recently been discussed in several journals. Here we discuss mercury exposure to the public eating baleen whales, toothed whales and tuna in relation to the European Food Safety Authority (EFSA) tolerable weekly intake (TWI).
May 8, 2019: Science of the Total Environment
Xiaomin Xie, Tingting Zhang, Michael Wang, Zhen Huang
Shale gas production in China could strengthen energy security while cutting CO2 emissions for China. However, the availability of and access to water could become major issue for shale gas development in certain parts of China. This study aims to estimate the water intensity (WI) of shale gas extraction in China, and to examine the impact of regional shale gas development on local water resources, from the water footprint (WF) point of view. Results of this study indicate that WI of shale gas is in the range of 0...
May 8, 2019: Science of the Total Environment
Alberto Rodríguez Bachiller, José Luis García Rodríguez, José Carlos Robredo Sánchez, David López Gómez
The world's reservoirs are losing capacity at a rate of 0.5-1% a year due to sedimentation processes. The strategies to reverse this trend must include an accurate estimation of sedimentation rates in terms of Specific Sediment Yield (SSY). This research develops an empirical and statistical model based on data from the CEDEX (Spanish Studies and Experimentation Centre for Public Works). From an initial number of 131 reservoirs studied in the period 19,672,004, a group of 26 reservoirs with medium-sized basins (750 to 1750 km2 ) was selected for analysis...
May 7, 2019: Science of the Total Environment
Meena K Yadav, Michael D Short, Cobus Gerber, John Awad, Ben van den Akker, Christopher P Saint
Drugs of addiction, have been recognized as potential contaminants of concern to the environment. Effluent wastewater discharge is a major source of contamination to aquatic receiving environments. A year-long monitoring program was undertaken in Australia to characterise the fate of four emerging drugs of addiction: methamphetamine; MDMA; pharmaceutical opioids: codeine and morphine and a metabolite: benzoylecgonine in four wastewater treatment plants operating with different secondary treatment technologies: conventional activated sludge (CAS), membrane bioreactors (MBR), integrated fixed-film AS (IFAS) and sequencing batch reactor (SBR)...
May 7, 2019: Science of the Total Environment
Diana Uivarosan, Delia Mirela Tit, Ciprian Iovan, Delia Carmen Nistor-Cseppento, Laura Endres, Liviu Lazar, Cristian Sava, Anca Maria Sabau, Camelia Buhas, Lavinia Cristina Moleriu, Simona Bungau, Lotfi Aleya
Stroke is the main cause of disability after age 65, leaving survivors with sequels that require care and recovery treatment lasting years. It is estimated that by the year 2030 this pathology will be leading cause of mortality. To determine the efficacy of Lokomat training combined with neurotrophic medication and balneo-physiotherapeutic treatment in rehabilitation of post-stroke patients, a prospective study of 3 parallel groups was conducted: Group I (n = 22) - Lokomat, balneo-physiotherapy, and Cerebrolysin; Group II (n = 18) - Lokomat associated with balneo-physiotherapy; and Group III (n = 30) - balneo-physiotherapy alone (Control group)...
May 7, 2019: Science of the Total Environment
Haiyang Chen, Xiaomei Bai, Yuezhao Li, Lijun Jing, Ruihui Chen, Yanguo Teng
The peri-urban rivers are one of the critical interfaces between urban-rural symbiotic ecosystems and appear to be a reservoir of antibiotic resistance genes (ARGs) in the environment. To prevent the transmission risks of ARGs between peri-urban river and human, it is essential to explore the prevalence and source of ARGs in the environment for designing potential mitigation strategies. In this study, we focused on the characterization and source-tracking of ARGs in the sediments of a typical peri-urban river in Beijing, Chaobai River...
May 7, 2019: Science of the Total Environment
Li Xie, Knut Asbjørn Solhaug, You Song, Dag Anders Brede, Ole Christian Lind, Brit Salbu, Knut Erik Tollefsen
High dose rates of ionizing radiation have been reported to cause adverse effects such as reduction in reproduction and growth, and damage to protein and lipids in primary producers. However, the relevant effects of ionizing radiation are still poorly understood in aquatic plants. This study was intended to characterize the biological effects and modes of action (MoAs) of ionizing radiation using gamma radiation as the prototypical stressor and duckweed Lemna minor as a model organism. Lemna minor was exposed to 1, 14, 24, 46, 70 mGy/h gamma radiation dose rates from a cobalt-60 source for 7 days following the testing principles of the OECD test guideline 221...
May 7, 2019: Science of the Total Environment
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