نتایج جستجو برای: bioaccumulation factor

تعداد نتایج: 847279  

2013
Swayamprava Dalai Sunandan Pakrashi Natarajan Chandrasekaran Amitava Mukherjee

The ever increasing industrial and consumer applications of titanium dioxide nanoparticles (TiO2 NPs) raise concern over the possible risk associated with their environmental exposure. Still, the knowledge regarding nanoparticle behavior in a freshwater ecosystem is lacking. The current study focuses on the toxicity of TiO2 NPs towards Ceriodaphnia dubia (a dominant daphnid isolated from the fr...

Journal: :Chemosphere 2002
Hai Yan Gang Pan

The effective concentrations of copper on the inhibition of the growth of Scenedesmus obliquus, Chlorella pyrenoidosa and Closterium lunula at 96 h (96 h EC50) were determined to be 50, 68 and 200 microg/l, respectively. The low initial bioaccumulation of Cu by C. lunula was found to be responsible for its tolerance to Cu. The amount of Cu accumulated by all three microalgae reached the maximum...

Journal: :Nigerian Journal of Life Sciences 2022

The concentration of some heavy metals, Lead, Nickel, Zinc and Iron from the waters, sediment liver Malapterurus electricus collected Lekki Lagoon were investigated. parasites found inside M.electricus also investigated for these metals. Pb, Ni, Zn Fe in M . exceeded WHO (1993) approved limits significantly higher (P<0.01) than those water (Pb, 0.976 + 0.79mg/kg, Fe, 24.54 55.07mg/kg, Zn, 6....

Journal: :Chemosphere 2006
Chao-Yang Wei Tong-Bin Chen

In an area near an arsenic mine in Hunan Province of south China, soils were often found with elevated arsenic levels. A field survey was conducted to determine arsenic accumulation in 8 Cretan brake ferns (Pteris cretica) and 16 Chinese brake ferns (Pteris vittata) growing on these soils. Three factors were evaluated: arsenic concentration in above ground parts (fronds), arsenic bioaccumulatio...

2016
M. Bhat A. Mesquita D. Ray B. Fernandes

This study highlights the behaviour of Mercury in the abiotic and biotic segments of the Mandovi-Zuari estuarine system. Spatial, seasonal (Premonsoon and Postmonsoon) and tidal, distribution of THg in dissolved/particulate fractions, sediment concentrations were mapped of the river mouths, Mormugao Port, inner and outer environs of this estuarine system. Observed seasonal partition studies pro...

Journal: :Chemosphere 2014
Peng Xu Yinghuan Wang Yanfeng Zhang Jianzhong Li Huili Wang

Earthworms represent an important food source for many vertebrates and as a result, predators may encounter toxic effects via the food chain from consumption of contaminated worms. Therefore, including an assessment of xenobiotic to worms in risk assessment procedures is advisable. Here we studied the acute toxicity, bioaccumulation and elimination of ethofumesate enantiomers in earthworm, Eise...

2013
Chad L. Loflen

The spotted sand bass (Paralabrax maculatofasciatus) is an important recreational sport and subsistence food fish within San Diego Bay, a large industrialized harbor in San Diego, California. Despite this importance, few studies examining the species life history relative to pollutant tissue concentrations and the consumptive fishery exist. This study utilized data from three independent spotte...

2011
Yoshiyuki Inoue Naoki Hashizume Erina Kikushima Masanori Otsuka

Carp (Cyprinus carpio L.) were exposed to nitrofen (NIP) by different routes (via water or food) to compare bioaccumulation parameters and tissue distribution. The bioconcentration factor of NIP was 5,100, and the lipid-corrected biomagnification factor was 0.137. Growth-corrected elimination half lives were 2.1-3.0 days via aqueous exposure and 2.7-2.9 days via dietary exposure. From either up...

Journal: :international journal of environmental research 0

spirulina platensis, a cyanobacterium of economic important was studied for the tolerance to cadmium. the bioassay studies showed the ec50 value to be 1.53 mg/g. the cyanobacterium was very sensitive to low metal concentration and the productivity was also reduced. the chlorophyll pigments reduced with decreasing the algal biomass. the algal survival rate showed a marked reduction in their surv...

Journal: :journal of advances in environmental health research 0
hamdollah eskandari associate professor, department of agriculture, payame noor university, tehran, iran. ashraf alizadeh amraie instructor, department of agriculture, payame noor university, tehran, iran.

the  present study was aimed  at comparing the ability of three crop plants for phytoremediation of zinc (zn) and nickel (zn) from soils. a factorial (3×2×3) experiment based on rcbd was  used to compare the treatments,  and was repeated three times. the first factor was crop type (wheat, clover and rapeseed), the second factor was heavy metal types (zinc (zn) and nickel (ni)) and the third fac...

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