Δευτέρα 20 Απριλίου 2020

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Ecological risk evaluation and source apportionment of heavy metals in park playgrounds: a case study in Xi’an, Shaanxi Province, a northwest city of China
Abstract Park playgrounds recently are suffering serious heavy metals contamination in China. It is urgent to assess the ecological risk and identify the sources for heavy metals. A total of 111 topsoil samples were collected from four park playgrounds in Xi’an, and the X-ray fluorescence (XRF) instrument was used to measure the concentrations of heavy metals including chromium(Cr), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), lead (Pb), manganese (Mn), and cobalt (Co), respectively....
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2d
Effect of char addition on anaerobic digestion of animal by-products: evaluating biogas production and process performance
Abstract The effect of char addition on the digestion of animal by-products was evaluated as a way for enhancing the performance of the process. Two different types of carbonaceous materials were tested as carbon conductive elements to improve biological treatment. One was derived from a torrefaction process intended for increasing the energy density of lignocellulosic biomass, and the other was obtained from a hydrothermal carbonisation process. In this research, batch digestion...
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2d
Phytotoxicity and phytogenotoxicity of soil and air in the vicinity of a petrochemical plant in Płock (Poland)
Abstract Petrochemical industries have been widely recognised as important emission sources of airborne contaminants including heavy metals and polycyclic aromatic hydrocarbons PAHs, which affect the quality of air, soil and vegetation. In this study, our aim was to examine the phytotoxicity and phytogenotoxicity of soils and air in the vicinity of a petrochemical plant, in order to assess the potential threat of such industrial objects for crops and natural vegetation, in the...
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2d
Characterization of urea SCR using Taguchi technique and computational methods
Abstract Use of biodiesel in diesel engine helps to reduce HC, CO, and smoke emissions due to their enormous oxygen content, whereas NOx emissions formed by Zeldovich mechanism shoot up. Implementation of Bharat Stage (BS) VI by April 2020 in India has created extreme pressure on automobile manufacturers to include after treatment technology in their systems. Selective catalytic reduction (SCR), a NOx control technology, is operated using aqueous urea solution as the reductant....
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2d
Trends in air quality and hospital admissions due to respiratory diseases since the standstill of an industrial plant in Brazil
Abstract At the end of 2015, the rupture of an iron ore tailings dam resulted in the standstill of a pelletizing plant in the city of Anchieta, southeastern Brazil. Despite the negative environmental impact due to the dam rupture, the pelletizing plant standstill has provided a valuable opportunity for the assessment of the changes in local air quality. This work presents a statistical analysis of the spatial and temporal patterns of PM10, PM2.5, SO2, NO2, and O3, between 2012...
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2d
Enhanced composting as a way to a climate-friendly management of coffee by-products
Abstract This study investigated the performance of aerobic windrow systems by using coffee by-products and green waste to reduce gaseous emissions. Thereafter, a comparison with the current treatment and gaseous emissions at a Coffee Mill in Costa Rica was made. Two different studies where performed in Germany (pile I and II) and one study in a Coffee Mill in Costa Rica (pile III). Temperature, water content, and pH were the key parameters controlled over 35 days in all the systems....
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2d
Are Malaysian airline passengers willing to pay to offset carbon emissions?
Abstract Recently, greenhouse gas (GHG) emissions become the hottest issue in the transportation sector. The air transport sector contributes approximately 2% of global greenhouse gas emissions. Reducing greenhouse gas emissions from aircraft is one of the issues taken seriously by the transportation sector. However, air transportation has implemented several ways to reduce carbon emissions, and one of them is by launching a carbon offset program. This study estimates the willingness...
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2d
Effects of meteorology and soil on the herb species diversity in plantations in a reclamation area of coal mine after 6 years
Abstract The ecological restoration of mining areas has always been emphasized in ecological research. This study has investigated herb species diversity of plantations in a reclamation area of the Antaibao opencast coal mine in China after 6 years, aiming to investigate the changes over time and spontaneous succession patterns. One hundred fifty-six species of naturally colonizing herb belonging to 26 families and 86 genera in the six plantations were chosen. Most of 24 herb-dominant...
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2d
Nexus between urbanization, emission, openness, and energy intensity: panel study across income groups
Abstract Energy is a basic need for the fulfillment of human activities, and usage of energy causes a rise in the carbon emission levels. This paper examines the impact of trade openness, urbanization, imports and exports on carbon emission, and energy intensity for 192 countries from higher, upper-middle, lower-middle, and low-income groups. The data are taken from the year 1990 to 2017 and Generalized method of moments (GMM) is applied for the empirical analyses. Results showed...
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2d
Heavy metal removal from water by adsorption using a low-cost geopolymer
Abstract In the present study, a geopolymer from dolochar ash was synthesized and used for the removal of heavy metal ions such as Co(II), Ni(II), Cd(II), and Pb(II) from the aqueous solution through the adsorption process. The geopolymer was characterized by a series of analytical techniques. The XRD pattern revealed the loss of dolochar ash crystallinity on geoploymerization. The peak at 982 cm−1 observed in the FTIR spectrum due to Si–O–Si and Si–O–Al bonds confirmed the formation...
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2d
Resource recovery from wastewater, solid waste, and waste gas: engineering and management aspects
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2d
Effects of nitrogen source and N/P on growth and photosynthesis in the invasive marine macroalga Chaetomorpha valida
Abstract The invasive marine macroalga Chaetomorpha valida blooms frequently in Apostichopus japonicus culture ponds in North China, resulting in negative environmental consequences. The factors driving this algal overgrowth are unclear. Previous studies observed that eutrophication strongly influences abnormal growth of nuisance macrophytes, but relatively few studies have addressed the types and abundance of nitrogen in A. japonicus culture ponds during the seasonal progression...
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2d
Enhancement in the selectivity of O 2 /N 2 via ZIF-8/CA mixed-matrix membranes and the development of a thermodynamic model to predict the permeability of gases
Abstract Zeolitic imidazolate framework-8 (ZIF-8) has a sodalite topology. ZIF-8 is composed of zinc ion coordinated by four imidazolate rings. The pore aperture of ZIF-8 is 3.4 Å, which readily retains large gas molecules like N2. In this work, mixed-matrix membranes (MMMs) have been fabricated by utilizing ZIF-8 and pristine cellulose acetate (CA) for O2/N2 separation. Membranes of pristine CA and MMMs of ZIF-8/CA at various ZIF-8 concentrations were prepared in tetrahydrofuran...
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2d
Chromium (VI) in phosphorus fertilizers determined with the diffusive gradients in thin-films (DGT) technique
Abstract Phosphorus (P) fertilizers from secondary resources became increasingly important in the last years. However, these novel P-fertilizers can also contain toxic pollutants such as chromium in its hexavalent state (Cr(VI)). This hazardous form of chromium is therefore regulated with low limit values for agricultural products even though the correct determination of Cr(VI) in these fertilizers may be hampered by redox processes, leading to false results. Thus, we applied the...
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3d
Climate change–induced human conflicts and economic costs in Pakistani Punjab
Abstract Understanding causes of interpersonal conflicts, related costs, and the effects on investment in agriculture are important concerns of social sciences. The present study was designed to explore these aspects in relation to climate change, since rising temperature and precipitation are considered crucial causal factors in fueling interpersonal conflicts. The study used cross-sectional data collected from rural farm households from a large district of Pakistani Punjab. Cost...
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3d
Determining optimum sampling numbers for survey of soil heavy metals in decision-making units: taking cadmium as an example
Abstract Optimum sampling number (OSN) is one critical issue to achieve credible results when surveying heavy metals in soil and undertaking risk assessment for sustainable land use or remediation decisions. Although traditional methods, such as classical statistics, geostatistics, and simulated annealing algorithm, have been used to determine OSN for surveying soil heavy metals, their usefulness is limited because the distribution of soil heavy metal concentration approximately...
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3d
Identification of mercury and nanoparticles in roots with different oxidation states of an abandoned coal mine
Abstract The morphology and composition of roots with different degrees of oxidation as a function of time were evaluated aiming to identify possible hazardous elements and nanoparticles. The roots were obtained from an abandoned coal mine located in the city of Criciúma, Santa Catarina, Brazil. From the roots, analyses were performed to identify nanoparticles (NPs) and ultrafine particles (UFPs), containing possible hazardous elements (PHEs) that cause potential environmental...
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3d
Screening of chemical composition and risk index of different origin composts produced in Lithuania
Abstract The application of composts could be accompanied by potential hazards to soil and humans, caused by heavy metals and organic persistent pollutants. A total of 115 compost samples from four different origins (green waste composts, sewage sludge composts, mixed municipal waste composts after mechanical-biological treatment and mixed municipal waste compost) were collected to analyse the chemical composition, nutrients levels, seven heavy metals, 15 polycyclic aromatic hydrocarbons...
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3d
Development and cost-benefit analysis of a novel process for biofuel production from microalgae using pre-treated high-strength fresh cheese whey wastewater
Abstract In this study, a novel two-step integrated process is proposed to facilitate the microalgae biofuel production as well as fresh cheese whey wastewater (FCWW) treatment simultaneously. The pre- and post-treatment of high-strength FCWW were performed by means of coagulation and algal cultivation, respectively. The pre-treatment of FCWW for maximum removal of chemical oxygen demand (COD), turbidity (TUR) and total solids (TS) as responses was obtained by statistical optimization...
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3d
Evaluation of toxicological responses and promising biomarkers of topmouth gudgeon ( Pseudorasbora parva ) exposed to fipronil at environmentally relevant levels
Abstract Fipronil is an insecticide commonly used in agriculture. We report here on the sublethal and sub-chronic effects of fipronil on non-target topmouth gudgeon (Pseudorasbora parva) at environmentally relevant levels. The results showed that fipronil did not cause significant changes in brain acetylcholinesterase activities, glutathione S-transferase (GST) activities in the intestine, and GST, glutamic pyruvic transaminase (GPT), and glutamic oxaloacetic transaminase (GOT)...
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3d
Seasonal variation of biomarker responses in Cantareus aspersus and physic-chemical properties of soils from Northeast Algeria
Abstract This study belongs to the biomonitoring program of soil qualities using a land snail, Cantareus aspersus, as bioindicator. The metal-soil contamination in some sites (National Park of El Kala (NPK), El Bouni, Sidi Amar, Nechmaya, and Guelma) located in Northeast Algeria were determined during two seasons (winter and spring 2015, 2016). Glutathione (GSH) content and acetylcholinesterase (AChE) activity were significantly decreased in snails collected during spring as compared...
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3d
Role of transitory starch on growth, development and metal accumulation of Triticum aestivum cultivars grown under textile effluent fertilization
Abstract Accumulation of transitory starch in leaves is an environment-dependent multifaceted process affected through stress caused by nutrient deficiency or excess of heavy metals in growing medium. On the other hand, textile effluent is one of the major pollution causing industrial waste due to the presence of heavy metal and organic contaminants. Besides the presence of higher pollution load, this effluent also contains some minerals essential for plant growth and metabolism...
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3d
Induction of fetal abnormalities and genotoxicity by molybdenum nanoparticles in pregnant female mice and fetuses
Abstract Increasing the uses of molybdenum (Mo) nanoparticles in a wide range of applications including food, industry, and medicine, resulted in increased human exposure and necessitated the study of their toxic effects. However, almost no studies are available on their genotoxic effects, especially on pregnant females and their fetuses. Therefore, this study was undertaken to estimate the possible induction of genotoxicity and fetal abnormalities, especially fetal malformations...
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3d
Potential health risk assessment for inhabitants posed by heavy metals in rice in Zijiang River basin, Hunan Province, China
Abstract The contents of total arsenic (tAs), inorganic arsenic (iAs), Cd, Cr, Cu, Mn, Ni, Pb, Sb, and Zn in 135 rice grain samples from Zijiang River basin were determined, and the probabilistic distribution of noncarcinogenic and carcinogenic risks associated with ingesting locally produced rice was determined by Monte Carlo simulation. Further, multivariate statistical analysis was used to analyze the potential sources of the heavy metals in rice grains. The average concentrations...
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3d
Protective potential of curcumin or taurine on nephrotoxicity caused by bisphenol A
Abstract Bisphenol A (BPA) received heightened attention in the recent years due to humans continuously being exposed to it. This study explores the effect of taurine or curcumin on subacute BPA treatment-induced nephrotoxicity in rats (Rattus norvegicus). Forty-two adult albino male rats were exposed to BPA (130 mg/kg daily) for 28 days by gastric gavage. BPA led to lipid peroxidation, inhibiting antioxidant enzyme activities like catalase (CAT), superoxide dismutase (SOD), glutathione...
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3d
Carbon emissions and carbon trade balances: International evidence from panel ARDL analysis
Abstract International trade plays crucial roles in the evolution of carbon emissions given the prevalence of complex global supply chains. Production reallocation across countries promotes the cross-border trade of emission-embodied products and is closely related to emission transfer or carbon trade balance, which is defined as the difference between territorial and consumption emissions. One important issue addressed in this study is how carbon trade balances relate to carbon...
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3d
Comparative study on respiratory function among rural women using biomass fuel and non-biomass fuel: evidence of a cross-sectional survey in Bangladesh
Abstract Respiratory diseases’ mortality and morbidity have been a major public health burden primarily attributed to widespread exposure to indoor and outdoor pollutants in the environment. The study conducted among 510 Bangladeshi women residing in the northeastern zone of the Sylhet division from semi-urban and rural settings to compare the biomass fuel users (N = 255) with the non-biomass users (N = 255). It has been observed that all the symptoms had a higher prevalence among...
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3d
Health risks associated with accumulation of heavy metals in fish of Keenjhar Lake, Pakistan
Abstract The Keenjhar Lake in the southern part of Pakistan is exposed to heavy metal contamination, mainly due to the lack of proper upstream industrial effluent treatment. In this study, accumulation of heavy metals in five frequently consumed fish species Cirrhinus mrigala (Morakhi), Labeo rohita (Kur’ro), Solea solea (Mundi), Sperata seenghala (Singharo), and Anguilla bengalensis (Baam) from Keenjhar Lake were investigated. A total of 30 fish samples were collected from fishermen...
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3d
The valorisation of residual waste bales by urban mining
Abstract In the last decade, the approach to waste management has undergone severe changes. The urgent need to face the sustainable demand for energy and materials while limiting the burdens associated to traditional waste handling practices have figured out the concept of waste as a resource. New strategies boosting the extensive recovery and diverting waste from disposal activities have been promoted and framed in the wider context of the urban mining, promoting the full exploitation...
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3d
Optimal design of groundwater pollution monitoring network based on the SVR surrogate model under uncertainty
Abstract The simulation-optimization method is widely used in the design of the groundwater pollution monitoring network (GPMN). The uncertainty of the simulation model will significantly affect the design results of GPMN. When the Monte Carlo method is used to consider the influence of model uncertainty on the optimization results, the simulation model needs to be invoked many times, which will cause a huge amount of calculation. To reduce the calculation load, the study proposed...
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3d
Co-exposure to non-toxic levels of cadmium and fluoride induces hepatotoxicity in rats via triggering mitochondrial oxidative damage, apoptosis, and NF-kB pathways
Abstract Fluoride (F) and cadmium (Cd) are two common water pollutants. There is low information about their co-exposure in low doses. So, in this study, we evaluated the combination effects of non-toxic doses of F and Cd and the possible mechanism of their combined interaction. Male rats were exposed to non-toxic doses of sodium fluoride (30 mg/l) and/or cadmium chloride (40 mg/l) in drinking water for 6 weeks. Then, liver tissues were separated and several factors including oxidative...
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3d
Investigating the development efficiency of the green economy in China’s equipment manufacturing industry
Abstract The equipment manufacturing industry is the industrial base of China, which makes it imperative to coordinate the relationship between industrial development and environmental protection. Using panel data of the seven sub-industries in China’s equipment manufacturing industry from 2011 to 2015, this paper evaluates the static and dynamic aspects of green economic development efficiency by combining the super-efficiency slack-based measure model of unexpected output and...
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3d
Synthesis of nanohybrids of polycarbazole with α-MnO 2 derived from Brassica oleracea : a comparison of photocatalytic degradation of an antibiotic drug under microwave and UV irradiation
Abstract The present work describes the synthesis of α-MnO2 nanorods using a natural extract of Brassica oleracea (cabbage) and the formulation of its nanohybrids with polycarbazole, i.e., α-MnO2/PCz. Synergistic interaction between PCz and MnO2 is revealed from infrared spectroscopy (IR) studies while the composition is determined by X-ray photoelectron spectroscopy (XPS). The formation of α-MnO2 nanorods is confirmed via high-resolution transmission electron microscopy (HRTEM)....
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3d
Assessment of heavy metal pollution in Vistula river (Poland) sediments by using magnetic methods
Abstract The present study evaluated the level of heavy metal (HM) pollution in Vistula river sediments in a highly urbanized Warsaw agglomeration (Poland). Magnetometry was used to assess the pollution level by measuring the fine fractions (0.071 mm and < 0.071 mm) of sediments collected from the surface layer of the riverbank. The magnetic methods (e.g., mass magnetic susceptibility χ, temperature-dependence magnetic susceptibility, and hysteresis loop parameters) were supplemented...
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3d
Degradation of ciprofloxacin using a low-grade titanium ore, persulfate, and artificial sunlight
Abstract In this study, the magnetic fraction (MF) of a low-grade titanium ore (TO) was successfully used as an alternative Fe2+ source in five reuse cycles, in combination with persulfate (PS) and simulated sunlight (SSL) for the degradation of ciprofloxacin (CIP). The best response of the CIP initial concentration, irradiation time, and doses of MF and PS to degrade completely this pollutant were determined based on an experimental design. However, the individual application...
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3d
Acute toxicity of gold nanoparticles synthesized from macroalga Saccharina japonica towards Daphnia magna
Abstract This study was performed to explore acute toxicity of biologically synthesized gold nanoparticles (AuNPs) to a model organism Daphnia magna. Hence, using aqueous extract of marine macroalga Saccharina japonica, two AuNPs including SJ-AuNPs-72 (72.6 ± 43.8 nm) and SJ-AuNPs-10 (10.8 ± 2.8 nm) were synthesized. These AuNPs were characterized by different techniques such as UV-Vis spectrophotometry, transmission electron microscopy (TEM), dynamic light scattering (DLS), scanning...
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3d
Orthosilicic acid (OSA) reduced grain arsenic accumulation and enhanced yield by modulating the level of trace element, antioxidants, and thiols in rice
Abstract Arsenic (As), a toxic metalloid, is finding its route to human through intake of As-contaminated water and consumption of food grown on contaminated soil. Rice is the most As-affected crop. Present study is aimed to assess the impact of stabilized orthosilicic acid (a proprietary formulation for plant-available silicon (Si) and earlier used as fertilizer for rice to enhance growth and yield) in reducing the accumulation of As in rice grains. Application of arsenic in the...
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4d
Examination of a coupling coordination relationship between urbanization and the eco-environment: a case study in Qingdao, China
Abstract A better understanding of the relationship between urbanization and the eco-environment is necessary to guide sustainable urban development and formulate environmental policies. In this study, the city of Qingdao was taken as an example. We evaluated the quantitative evolution of the relationship between urbanization and the eco-environment development from 2000 to 2018 by establishing the comprehensive index system and applying it to the coupling coordination model. Results...
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4d
Presence of organophosphate esters in plasma of patients with hypertension in Hubei Province, China
Abstract Organophosphate esters (OPEs) are widely used as fire retardants, so they are almost ubiquitous pollutants. Recent studies had found that OPEs were detectable in human blood samples. However, the studies on the presence of OPEs in hypertensive patients were limited. In this study, 12 OPEs were detected and analyzed in plasma samples collected from hypertensive patients (case group) and unpaid blood donors (control group). The values of ∑12 OPEs concentrations ranged from...
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4d

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