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At present, research on relationships between carbon dioxide emissions and its influencing factors are concerned with linear causality relationships, and most literature has focused on the economic field to find its influencing factors. This article aims to investigate the causality relationships between carbon dioxide emissions and its influencing factors in China through the traditional Granger...
This study focuses on soil heavy metal pollution and the potential ecological risks associated with mining activities. For this work we collected 83 topsoil samples and 11 soil profile samples from a typical abandoned Pb-Zn mining area in Hunan Province, China. Concentrations of Cd, Pb, Zn, Cu, and Ni were measured using Inductively Coupled Plasma Mass Spectrometry (ICP-MS), and As was analyzed by...
The prime effort of the present investigation is to release the complex mixtures of cellulose and hemicellulose by delignification of cotton gin waste using a mixed culture of Trametes pubscens and Pycnoporus cinnabarinus. The delignification process was found to be efficient in the release of cellulose and hemicellulose and the pretreated biomass accessed to hydrolysis by producing C6 sugar. It is...
The mechanisms underlying the retention of inorganic N were still not well understood in an alpine meadow on the Tibetan Plateau as well as in other high-altitude meadow sites greatly grazed and disturbed. We conducted field soil and dominant species foliar nitrogen natural abundance of stable isotope ratios (δ¹⁵N) under four grazing intensities. It was demonstrated that soil δ¹⁵N decreased significantly...
The purpose of this work was to investigate whether weed infestation and weed coverage could be managed using less non-inversion soil disturbance. The study was carried out in a degraded chernozem soil in a long-term trial where five ploughless tillage treatments were applied in addition to the mouldboard ploughing treatment: subsoiling, tine tillage (deep and shallow), disk tillage, and direct drilling...
The structural configuration of bioretention plays an important role in the consumption and purification of nitrogen pollutants in rainfall runoff. Three layered bioretention tanks – 7#, 9#, and 10# – with artificial packing layers of fly ash mixing sand, blast furnace slag, and planting soil, respectively, were selected for intermittent and continuous operational tests. All load-reduction rates of...
The authors have examined the influence of biocomponents of different origin on exhaust gases emitted from a light duty vehicle with a compression ignition engine. The car was fuelled with diesel fuel containing 20% V/V fatty acid methyl esters and diesel fuel with 13% V/V hydrotreated vegetable oils and 7% V/V fatty acid methyl esters. Commercial diesel fuel containing 7% V/V esters was a reference...
The recommended process conditions and problems reported during anaerobic (co-)fermentation of waste biomass rich in proteins are discussed. Theoretical potentials of the individual biogas components (CH₄, CO₂, NH₃, H₂S) formed during chemical decomposition of aminoacids – feed additives commonly used in feeding animals – are shown, and we discuss side production of odors, e.g., ammonia and organic...
Environmental quality is a characteristic inherent to all ecosystems, and so knowledge of the indicators that define it, within those of sustainability as a whole, is of vital importance. In particular, environmental analysis of any area should include information on air quality together with data on water, soil, natural resources, and human beings. The distribution of individuals and their impact...
For this study we conducted a series of adsorption experiments to study the adsorption performance of reactive red 2 (RR-2), a typical anionic dye, on polyaniline-intercalated bentonite (Pani-Bent). The adsorbent was characterized by XRD, FTIR, SEM, TEM, and BET. We investigated the influences of several parameters, including pH, reaction time, temperature, inorganic salts, and initial concentrations...
The aim of the present study was to analyse commercially available compounds containing nanoparticles in the form of Ag, Cu, and Ag sulphate colloids applied in agriculture. The compounds were analysed with TEM and FTIR spectroscopy, i.e., methods that can complement the commonly used research techniques such as EDX or Raman spectroscopy. The results of the microscopic examinations evidenced the presence...
The ammonium sulfate ((NH₄)₂SO₄) seed aerosols commonly found in the Chinese urban atmosphere could affect the formation and aging of secondary organic aerosols (SOA). Aging of aromatic SOA is performed using UV-irradiation of 1,3,5-trimethylbenzene (135-TMB)/CH₃ONO/NO/air mixtures with high concentrations (~100 μg/m³) of (NH₄)₂SO₄ seeds in the laboratory chamber in this study. The particulate products...
This paper attempts to give a microeconomic explanation of the environmental Kuznets curve (EKC) hypothesis according to marginal cost and marginal revenue. The interpretation about the shape and inflection point of EKC is based on the comparison between marginal cost and marginal revenue. The emissions of carbon dioxide (CO₂), nitrous oxide (N₂O) and methane are used as the environmental indicators...
Playa Las Glorias is the main tourist destination for the inhabitants of the municipality of Guasave, Sinaloa, México, and it overlies a shallow coastal aquifer. In recent years, the momentum of the tourism industry in the region has brought a growing demand in the consumption of drinking water. Because of this, it is relevant to the precise knowledge of the interface of slightly brackish saltwater...
The occurrence of microorganisms and their relationships with total and available heavy metal concentrations (Cu, Zn, Pb, Cr, Ni, Cd, Hg, and As), as well as main soil chemical characteristics (pH, P, K, Ca, N tot, C org) were evaluated in naturally metalliferous serpentine soils and non-serpentine soils with elevated Ni and Cr concentrations. Significant negative correlations were detected between...
The aim of this research was to determine the interdependence between calcium and magnesium in drinking water, and the morbidity from ischemic heart disease (IHD). A structured epidemiological questionnaire was used to collect information on the amount of drinking water consumed by 200 respondents in areas with the highest and lowest values of Ca and Mg. In addition, information on various risk factors...
The Indian sandalwood tree is a highly valuable aromatic wood resource. But its population is declining at an alarming rate that cannot be controlled through manually employed management techniques. Also, the limitations of the automated management techniques in practice, such as the drawbacks of models like MAXENT, GARP, etc., can dealt with the usage of the techniques used in this research. ‘Strategy-oriented...
Ecological networks have been considered to be an effective strategy to counter habitat fragmentation, which is occurring in the urbanization context. Researchers and planners have begun to integrate ecological networks in both thematic planning and urban or regional planning for biodiversity conservation and sustainable development. In this paper, we integrated the least-cost path model, network...
The effect of sludge biochars obtained at different temperatures on the adsorption of Cd(II) by loess in northwestern China was investigated using the batch equilibrium method. The results showed that the pseudo second-order kinetic model can describe the kinetics of Cd(II) adsorption on the sludge biocharamended loess very well. The adsorption of Cd(II) by loess reached equilibrium in 6h. However,...
We investigated the biosorption characteristics of thallium (I) ions using dead biomass of Pseudomonas fluorescens strains as biosorbents. The biosorbents were characterized by Fourier transform infrared spectroscopy (FT-IR) and a scanning electron microscope (SEM). The effects of different environmental factors such as initial Tl concentration, initial solution pH, biomass dosage, and contact time...
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