This study has employed aggregate energy augmented production framework utilizing the gross domestic product (GDP), labor input, capital stock, energy, and export over the years from 1980 to 2014 on annual time series of the variables for Pakistan and South Asia panel. There is statistically insignificant association amid the variables for Pakistan while there is indication of long-run association amid the variables for panel of South Asia. The findings imply that energy conservation is efficient without hindering the economic growth and export expansion in Pakistan, albeit such kind of policy option is not much promising for the panel of four other South Asian countries. Furthermore, energy demand models must consider the role of exports expansion and its due impacts on the energy conservation of fossil fuels-based energy source and thereby on the trajectory of sustainable economic growth in the region.

A sensitive, specific, precise, accurate, and fast method Swas suitably developed for the determination of selected heavy metals including Cd, Cu, Fe, Pb, and Zn in tap water samples by inductivity coupled plasma-optical emission spectrometry (ICP-OES) after pre-concentration using Chelex-100 ion exchange resin. This method is based on studying several parameters including pH, weight of Chelex-100, HNO₃ concentration, flow rate, and column diameter. It was found that the suitable conditions used for pH, weight of Chelex-100, HNO₃ concentration, flow rate, and column diameter were 6, 4 g, 2 M, 1 mL/min, and 1 cm, respectively. Under these conditions, high recoveries were achieved with values of 95%, 106%, 77%, and 91% for Cu, Fe, Pb, and Zn, respectively. A total of 90 tap water samples were collected from five sampling zones of Irbid City, North Jordan, including (A: Barha zone; B: West and Zabda zone, C: South zone, D: East and city center zone, and E: North zone), and analyzed for Cd, Cu, Fe, Pb, and Zn; also the pH and electric conductivity (EC) values were measured. Moreover, the correlations between metals’ concentrations and type of tanks (iron, plastic, or semantic), type of pipes (iron or plastic), age of tanks, and age of pipes were evaluated. The mean concentrations of tested metals in tap water samples collected from zone A, zone B, zone C, zone D, and zone E, respectively, were the following: Cu (9.9 μg/L, 56.2 μg/L, 139.3 μg/L, 139.5 μg/L, and ND μg/L), Fe (463.6 μg/L, 237.8 μg/L, 55.4 μg/L, 142.5 μg/L, and 359.4 μg/L), Pb (60.6 μg/L, 25.6 μg/L, ND, 7.7 μg/L, and 40.3 μg/L), and Zn (189.4 μg/L, 275.8 μg/L, 265.6 μg/L, 307.1 μg/L, and 147.6 μg/L), whereas Cd levels in all zones were below the detection limit. In addition, results indicated that Pb and Fe had the same trend that is exceeding the permissible limit set by WHO, EPA, and Jordanian guidelines. A high positive correlation (r = 0.93) was found between Pb and Fe. Also, the altitude had a positive correlation between Pb and Fe concentrations, that is, as the altitude increases the concentration of Pb and Fe increases.

Hexavalent chromium or Cr (VI) is a serious health risk that has been identified in drinking water and generally originates as industrial by-products and hazardous waste sites, although natural sources have been reported. Common methods to remove Cr (VI) employ adsorption, filtration, ion exchange technologies, and redox reactions. We report on a macro porous polystyrene anion exchange resin, a solid-supported equivalent of tetra-alkyl ammonium carbonate (Biotage® MP-Carbonate), to effectively remove Cr (VI) from synthetic wastewater with bidentate or monodentate binding modes of chromate, depending on the pH environment. Sorption capacity is pH dependent with 332, 161, and 163 mg CrO₄²⁻ per gram of MP-Carbonate adsorbed at pH 2, 6.8, and 10, respectively. Experimental data indicate an exergonic and endothermic adsorption process. Static vs. dynamic reaction conditions are discussed. Density functional theory calculations parallel the Gibbs free energy results of the bidentate binding of the large chromate ion compared to carbonate with the ammonium ions. These studies identify the potential uses of MP-Carbonate in the remediation of Cr (VI) wastewater unrelated to the pH of the water source.

Cover systems can efficiently limit acid mine drainage generation from sulfidic mine wastes by controlling oxygen diffusion. Their performance relies on their high degree of saturation, as oxygen diffusion is substantially reduced in water or saturated medium. However, natural soils available in the mine vicinities do not necessarily have the hydrogeological properties required for the construction of sealing layers. A common strategy is to improve the characteristics of local soils using bentonite amendment, but this usually induces high costs and environmental footprint. An alternative is to reuse (or valorise) waste materials, such as mine wastes or industrial wastes like green liquor dregs (GLD). Blends of till and GLD can have advantageous properties regarding water retention capacity and hydraulic conductivity. In this study, the effective oxygen diffusion coefficient Dₑ of till-GLD blends was evaluated using 81 diffusion tests. Various quantities and different types of GLD were tested. The diffusion coefficient was found to vary greatly depending on the degree of saturation. Even though the GLD contained naturally a substantial amount of water, a high water content of the till was still required to reach a low Dₑ. Measurements were also compared with modified Millington-Shearer predictive model which could generally predict the diffusion coefficient within an acceptable range. Results also indicated that the till-GLD mixes should not be exposed to evaporation as significant performance loss may rapidly occur upon drying. Main experimental results are presented in this paper together with recommendations in terms of cover design using till-GLD mixes.

Alkylphenols (APₛ)—nonylphenol (NP) and octylphenol (OP)—are well-known environmental contaminants due to their widespread application and have been identified as endocrine-disrupting chemicals. A novel APₛ-tolerant fungus designated F6 was isolated from the bottom sediments of the coastal part of the Eastern Gulf of Finland (Neva Bay) and was identified as Aspergillus tubingensis F6 based on ITS sequencing and morphological analysis. The APₛ presence caused morphological and ultrastructural changes in fungal cells. Major differences were detected in mitochondria, vacuoles, and cell walls. Nonenzymatic antioxidants—pigments, reduced glutathione, exopolysaccharides—played important roles in A. tubingensis F6 resistance to APₛ toxicity. A low level of lipid peroxidation showed that the protective effects of the antioxidant system were sufficient despite the fact that antioxidant enzymes activity levels were low. Another defense response employed by A. tubingensis F6 against the tNP- and 4-tert-OP-induced stress was based on the ability of the strain to efficiently utilize xenobiotics. After 120 h of cultivation, < 10% of APₛ (initially added to the culture at 100 mg/l) remained in the culture medium of A. tubingensis F6. The APₛ degradation by A. tubingensis F6 led to the formation of nontoxic products. These data indicate the potential role for A. tubingensis F6 in APₛ degradation in natural environments, as well as its possible biotechnological application in wastewater treatment to remove xenobiotics with endocrine activity. To our knowledge, this is the first report demonstrating that marine-derived fungus A. tubingensis strain is capable of utilizing branched-chain NP and OP.

Although the number of cholera infection decreased universally, climate change can potentially affect both incidence and prevalence rates of disease in endemic regions. There is considerable consistent evidence, explaining the associations between cholera and climatic variables. However, it is essentially required to compare and interpret these relationships globally. The aim of the present study was to carry out a systematic review in order to identify and appraise the literature concerning the relationship between nonanthropogenic climatic variabilities such as extreme weather- and ocean-related variables and cholera infection rates. The systematic literature review of studies was conducted by using determined search terms via four major electronic databases (PubMed, Web of Science, Embase, and Scopus) according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach. This search focused on published articles in English-language up to December 31, 2018. A total of 43 full-text studies that met our criteria have been identified and included in our analysis. The reviewed studies demonstrated that cholera incidence is highly attributed to climatic variables, especially rainfall, temperature, sea surface temperature (SST) and El Niño Southern Oscillation (ENSO). The association between cholera incidence and climatic variables has been investigated by a variety of data analysis methodologies, most commonly time series analysis, generalized linear model (GLM), regression analysis, and spatial/GIS. The results of this study assist the policy-makers who provide the efforts for planning and prevention actions in the face of changing global climatic variables.

The oily wastewater was treated by electrocoagulation with Fe₇₈Si₉B₁₃ amorphous ribbons as anode and graphite plates as cathode under such processing parameters as different pH values and current density, respectively. The degradation effect on the oily wastewater was characterized by chemical demand oxygen (COD), while the ribbons before and after using were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results indicate that under the conditions of pH = 3 and current density being 3.125 A/cm², the optimal COD removal efficiency was obtained to be 73.22%. Compared with the ordinary crystalline iron plate, the COD removal efficiency of resultant wastewater degraded by the amorphous ribbons is more than doubled. Simultaneously, the Fe₇₈Si₉B₁₃ amorphous ribbons exhibit good structural stability even after four cycles of using.

Pathways of photochemical degradation of a cardiovascular drug verapamil under conditions relevant to natural waters and the toxicity of the photoproducts to Daphnia magna were investigated. Photodegradation was shown to proceed via photocatalysed mechanism. Two main photodegradation pathways were recognised: the first leading to hydroxylation at the methylamino position followed by splitting of verapamil molecule into two fragments, and the second providing the main active metabolite of verapamil, norverapamil, and a series of norverapamil isomers, followed again by their splitting at the amino group position. Twenty-two products of photodegradation were identified. Toxicity assays in sublethal concentrations of the parental drug, of the photoproduct mixture, and of norverapamil revealed no direct negative response in Daphnia magna to verapamil. On the other hand, photochemical products significantly lowered the number of juveniles, number of clutches, and body size of Daphnia. The exposition of Daphnia to norverapamil showed the same but even more pronounced effects than its exposition to the mixture of photoproducts, which leads to the conclusion that norverapamil is mainly responsible for the toxicity of photoproduct mixture and represents a noteworthy threat to aquatic invertebrates.

Climate change issues and adaptation strategies have drawn much attention from many fields in recent years. Taiwan, an island state, is deeply threatened by the multiple threats posed by climate change. However, different urban and rural areas have numerous adaptation approaches due to their differences in vulnerability. In Taipei City (urban), its biophysical vulnerability is mainly affected by flooded areas and high flood depths caused by landslides and heavy rains. Its social vulnerability is affected by economic development, high household assets, and population concentration. In Yunlin County (rural), its biophysical vulnerability is also affected by flooded areas and high flood depths caused by heavy rains. Its social vulnerability is affected by the elderly living alone, low household assets, and low healthcare. In order to propose appropriate adaptation strategies of urban and rural areas under different vulnerabilities, this study uses an overlapping method to examine the relationship between the integrated vulnerability (biophysical and social) of Taipei and Yunlin along with the ecological footprint (EF), a measurement of human demands for resources and ecological services. This study reviews the literature and uses Taiwan’s NCDR (National Science and Technology Center for Disaster Reduction) data to analyze the biophysical vulnerability and the social vulnerability and further calculate the integrated vulnerability. In this study, questionnaire surveys were conducted. In Taipei, 446 valid questionnaires were collected, while 393 were collected in Yunlin. The results show that personal EF in Taipei is higher than that in Yunlin. In the end, this study elucidates the relationship between integrated vulnerability and personal EF of Taipei and Yunlin. Four types of risk areas in urban Taipei and rural Yunlin are sorted out (high vulnerability/high EF, high vulnerability/low EF, low vulnerability/high EF, and low vulnerability/low EF). The empirical results can be adopted by local governments, communities, and NGOs to establish appropriate strategies for mitigation and adaptation in the different risk areas.

In this study, we clarified the accumulation and concentration of Cs, Na, and K in each organ (leaves, stem, and panicle) of quinoa (Chenopodium quinoa Willd.) under NaCl application condition. Pot experiments using Wagner pots (1/5000a) were conducted in an experimental field at Nihon University in 2018 and 2019, using quinoa variety CICA-127. The growth of quinoa as well as Cs accumulation and concentration was promoted by increasing the amount of NaCl applied. Quinoa accumulated most of the Cs in the leaves, and it was not translocated from the leaves to panicle after the seed filling stage. Cs accumulation by the aboveground parts under NaCl application was at least four times higher than that in the control. Accumulation of Na in stem was highest among organs. The quinoa plants had the mechanism to accumulate Na in the stem. Quinoa has bladder cells on the leaf surface, and excess Na accumulates in these cells. It is unknown whether bladder cells are present on the surface of the stem. Since Cs and Na inhibited the growth of plants, it is necessary to clarify the suppression method of stunting by Cs and Na. Thus, we believe that quinoa can be used for phytoremediation of Cs. Quinoa varieties with high Cs absorption need to be selected for effective phytoremediation in the future experiment.