Environmental Science and Pollution Research - South Asia is comprised of several countries, including Bangladesh, Pakistan, India, and Sri Lanka, all ranked highly at risk of climatic variability.... 相似文献
Environmental Science and Pollution Research - The direct discharge of azo dyes and/or their metabolites into the environment may exert toxic, mutagenic, and carcinogenic effects on exposed fauna... 相似文献
Environmental Science and Pollution Research - Copper (Cu) is an extensively used heavy metal and an indispensible micronutrient for living beings. However, Cu is also toxic and exerts multiple... 相似文献
Environmental Science and Pollution Research - Massive discharge of wastes produced by the processing of leather so far confers the most important environmental challenge facing the tanneries... 相似文献
NH4^+ ion, a main pollutant in aquatic systems, not only causes eutrophication in rivers and lakes but also contributes to fish toxicity. In this study, an eco-friendly biosorbent was prepared from the pyrolysis of corn cob, a low-cost agricultural residue. The biochars produced by pyrolysis of corn cob at 400℃ and 600℃ were characterized and investigated as adsorbents for NH4+ -N from an aqueous solution. The biochars were characterized through elemental analysis, Brunauer-Emmett-Teller-N2 surface area analysis, scanning electron microscopy, and Fourier transform infrared spectroscopy. Batch experiments were conducted to investigate the NH4+ adsorption process of the corn cob biochars. The Freundlich isotherm model fitted the adsorption process better than the Langmuir and Dubinin-Radushkevich isotherm models. Moreover, the adsorption process was well described by a pseudo-second-order kinetic model. Results of thermodynamic analysis suggested that adsorption was a nonspontaneous exothermic process. Biochars produced at 400℃ had higher adsorption capacity than those produced at 600℃ because of the presence of polar functional groups with higher acidity. The exhausted biochar can be potentially used as soil conditioner, which can provide 6.37 kg NH4+-N-t^-1 (N fertilizer per ton of biochar). 相似文献
Extensive degradation of Indonesian peatlands by deforestation, drainage and recurrent fires causes release of huge amounts
of peat soil carbon to the atmosphere. Construction of drainage canals is associated with conversion to other land uses, especially
plantations of oil palm and pulpwood trees, and with widespread illegal logging to facilitate timber transport. A lowering
of the groundwater level leads to an increase in oxidation and subsidence of peat. Therefore, the groundwater level is the
main control on carbon dioxide emissions from peatlands. Restoring the peatland hydrology is the only way to prevent peat
oxidation and mitigate CO2 emissions. In this study we present a strategy for improved planning of rewetting measures by dam constructions. The study
area is a vast peatland with limited accessibility in Central Kalimantan, Indonesia. Field inventory and remote sensing data
are used to generate a detailed 3D model of the peat dome and a hydrological model predicts the rise in groundwater levels
once dams have been constructed. Successful rewetting of a 590 km2 large area of drained peat swamp forest could result in
mitigated emissions of 1.4–1.6 Mt CO2 yearly. This equates to 6% of the carbon dioxide emissions by civil aviation in the European Union in 2006 and can be achieved
with relatively small efforts and at low costs. The proposed methodology allows a detailed planning of hydrological restoration
of peatlands with interesting impacts on carbon trading for the voluntary carbon market. 相似文献
Sludge granulation is considered to be the most critical parameter governing successful operation of an upflow anaerobic sludge blanket and expanded granular sludge bed(EGSB)reactors.Pre-granulated seeding sludge could greatly reduce the required start- up time.Two lab-scale and a pilot-scale EGSB reactors were operated to treat Shaoxing Wastewater Treatment Plant(SWWTP) containing wastewater from real engineering printing and dyeing with high pH and sulfate concentration.The microbiological structure and the particle size distribution in aerobic excess sludge,sanitary landfill sludge digested for one year,and the granular sludge of EGSB reactor after 400 d of operation were analyzed through scanning electron microscopy (SEM) and sieves.The lab-scale EGSB reactor seeded with anaerobic sludge after digestion for one year in landfill showed obviously better total chemical oxygen demand (TCOD)removal efficiency than one seeded with aerobic excess sludge after cation polyacrylamide flocculation-concentration and dehydration.The TCOD removed was 470.8 mg/L in pilot scale EGSB reactor at short hydraulic retention time of 15 h.SEM of sludge granules showed that the microbiological structure of the sludge from different sources showed some differences.SEM demonstrated that Methanobacterium sp.was present in the granules of pilot-scale EGSB and the granular sludge produced by landfill contained a mixture of anaerobic/anoxic organisms in abundance.The particle size distribution in EGSB demonstrated that using anaerobic granular sludge produced by sanitary landfill as the seeding granular sludge was feasible. 相似文献
Environmental Science and Pollution Research - Urban stormwater runoff is considered as one of the major contributors to nonpoint source that contributes to the pollution of all water resources in... 相似文献
Sources of renewable energy have received wide attention in the literature because of serious threats to the environment. However, some renewable resources, including biomass energy role is debatable in the energy economics literature. This empirical work focuses to analyze the role of biomass energy in carbon dioxide (CO2) emissions using the framework of the environmental Kuznets curve (EKC) in Pakistan over the period from 1980 to 2015. The bound testing approach suggests there is cointegration among study variables. The study uses an auto-regressive distributed lag model (ARDL) with a structural break in the series. To summarize the findings of the study, it can be inferred that biomass energy increase CO2 emissions. In addition, biomass energy helps to form a U-shaped relationship between income and CO2 emissions that support the EKC hypothesis. Also, the feedback hypothesis is found between biomass energy and CO2 emissions. The findings would guide policymaker with practical guidelines to formulate policies to utilize a high amount of biomass energy in a sustainable manner.