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Environment

Extraction of Pb(II) from water samples by ionic liquid-modified silica sorbents
submitted by doasakm 2 hours ago - Topic: Environment
Removal of toxic heavy metals from water matrices is an important challenge in water pollution. In this study, a solid-phase extraction method based on physical adsorption is reported for the removal of Pb(II). Two modified silica sorbents were developed by direct immobilization of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (C4) and 1-hexyl-3-methylimidazolium bis(trifluorom...



Application of salt extracted peanut seeds in the pretreatment of palm oil mill effluent (POME)
submitted by doasakm 3 hours ago - Topic: Environment
This paper presents a study on the effectiveness of salt extracted peanut seeds after oil extraction as a novel coagulant for turbidity, total suspended solids (TSS) and chemical oxygen demand (COD) removal in palm oil mill effluent (POME) pretreatment process. The coagulation activity was investigated for the peanuts seeds after its oil extraction. The active coagulation component was extracte...

An Experimental Investigation of Hard and Soft Price Ceilings in Emissions Permit Markets
submitted by sothesh 3 hours ago - Topic: Environment
Tradable emissions permits have been implemented to control pollution levels in various markets and represent a major component of legislative efforts to control greenhouse gas emissions. Because permits are supplied for a fixed level of pollution, allowing the market for permits to determine the price, price control mechanisms may be needed to protect firms from price spikes caused by fluctuat...

Optimal Multi-species Harvesting in Ecologically and Economically Interdependent Fisheries
submitted by sothesh 3 hours ago - Topic: Environment
Single-species management of multi-species fisheries ignores ecological interactions in addition to important economic interactions to the detriment of the health of the ecosystem, the stocks of fish species, and fishery profits. This study maximizes the net present value from a multi-species fishery where species interact ecologically in the ecosystem, and economically through vessels’ multi...

Setting Environmental Policy When Experts Disagree
submitted by sothesh 3 hours ago - Topic: Environment
How can a decision-maker assess the potential of environmental policies when a group of experts provides divergent estimates on their effectiveness? To address this question, we propose and analyze a variant of the well-studied (alpha )-maxmin model in decision theory. In our framework, and consistent to the paper’s empirical focus on renewable-energy R&D investment, experts’ subjective...



The effects of estrone and 17β-estradiol on microbial activity and bacterial diversity in an agricultural soil: Sulfamethoxazole as a co-pollutant
submitted by morteno 3 hours ago - Topic: Environment
Estrogens and veterinary antibiotics (VAs) that are contained in animal excrements are spread into agricultural soil when using animal wastes on farmland. The impacts of VAs on soil health have already been well documented. However, there is limited knowledge regarding the influence of estrogens, particularly the combined effects of estrogens and VAs, on the soil microbial community. In this st...

Assessment of mutagenic potential of pyrolysis biochars by Ames Salmonella/mammalian-microsomal mutagenicity test
submitted by morteno 3 hours ago - Topic: Environment
Biochar is of raising interest in sustainable biomass utilization concepts. Particularly biochar derived from pyrolysis attaches important agricultural capacities mandatory for an improved carbon sequestration, soil fertility and amelioration, respectively. In fact, large scale field trials and commercial business with biochar materials have already been started but still only few are known abo...


The trans-generation effect during pulsed cadmium exposure: Tolerance and induction of hsp70
submitted by morteno 3 hours ago - Topic: Environment
Although the importance of pulse exposure has gained ground in recent years, it still needs to be better evaluated and understood. Two successive generations of Daphnia magna were exposed to four concentrations (40, 60, 80 and100µgCdl−1) of 6h cadmium (Cd) pulses. The increase of pulsed concentration of parent generation (F0) led to the decrease of EC50 and an increase of 21-day cumulative m...

Low and high doses of UV-B differentially modulate chlorpyrifos-induced alterations in nitrogen metabolism of cyanobacteria
submitted by morteno 3 hours ago - Topic: Environment
The present study assessed the comparative responses on the specific growth rate, nitrogen metabolism and enzymes associated with nitrogen metabolism in two nitrogen fixing cyanobacteria—Nostoc muscorum and Phormidium foveolarum exposed to two UV-B doses (low; UV-BL: 0.5472kJm−2 and high; UV-BH: 5.472kJm−2) and two doses of the insecticide chlorpyrifos (O,O-diethyl O-3,5,6-trichloro-2-pyr...


Cloning and expression of ophB gene encoding organophosphorus hydrolase from endophytic Pseudomonas sp. BF1-3 degrades organophosphorus pesticide chlorpyrifos
submitted by morteno 3 hours ago - Topic: Environment
Chlorpyrifos is an organophosphate pesticide that has adverse effect on animals and plants. We isolated endophytic bacterial strain, Pseudomonas sp. BF1-3, from balloon flower root which can hydrolyze chlorpyrifos. A gene (ophB) encoding a protein involved in chlorpyrifos degradation from this strain was cloned into Escherichia coli DH5α for confirming enzyme activity. After sequencing, total ...

Inhalation and dermal exposure to atmospheric polycyclic aromatic hydrocarbons and associated carcinogenic risks in a relatively small city
submitted by morteno 3 hours ago - Topic: Environment
The aim of this study was to conduct a carcinogenic risk assessment for exposure to polycyclic aromatic hydrocarbons (PAHs) via routes of inhalation and dermal contact. Concentrations of 19 PAH species were determined during a heating period at a site in the city of Balikesir, Turkey. Two questionnaires were administered to a sample of inhabitants to determine time-activity budgets and demograp...


Impact of UV-B on drought- or cadmium-induced changes in the fatty acid composition of membrane lipid fractions in wheat
submitted by morteno 3 hours ago - Topic: Environment
Uv-b radiation may have either a positive or negative impact under the same conditions in wheat, depending on the type of secondary abiotic stressor: Cd or drought. Supplemental uv-b prevented the wilting and leaf rolling induced by PEG treatment. In contrast, combined uv-b and Cd treatment resulted in pronounced oxidative stress. The opposite effect of uv-b radiation in the case of drought or ...

Occurrence, sources, and potential human health risks of polycyclic aromatic hydrocarbons in agricultural soils of the coal production area surrounding Xinzhou, China
submitted by morteno 3 hours ago - Topic: Environment
A comprehensive investigation of the levels, distribution patterns, and sources of polycyclic aromatic hydrocarbons (PAHs) in agricultural soils of the coal production area surrounding Xinzhou, China, was conducted, and the potential human health risks associated with the levels observed were addressed. a total of 247 samples collected from agricultural soils from the area were analyzed for six...

Qualitative toxicity assessment of AgNPs on the fresh water bacterial isolates and consortium at low level of exposure concentration
submitted by morteno 3 hours ago - Topic: Environment
Silver nanoparticles (AgNPs) pose a high risk of exposure to the natural environment owing to their extensive usage in various consumer products. In the present study we attempted to understand the harmful effect of AgNPs at environmentally relevant low concentration levels (≤1ppm) towards two different freshwater bacterial isolates and their consortium. The standard plate count assay suggest...

Effects of atrazine and chlorpyrifos on DNA methylation in the liver, kidney and gill of the common carp (Cyprinus carpio L.)
submitted by morteno 3 hours ago - Topic: Environment
Pesticide exposure has repeatedly been associated with cancers, although the molecular mechanisms behind this association are largely undetermined. Abnormal DNA methylation plays a key role in the process of some disease. However, little was known about the effect of pesticides on DNA methylation in the common carp. In this study, we investigated the mRNA levels of DNA methyltransferases (DNMTs...