Determination of toxic metal release from metallic kitchen utensils and their health risks

2020 ◽  
Vol 145 ◽  
pp. 111651
Author(s):  
Ye Ji Koo ◽  
Eun Chul Pack ◽  
Ye Jin Lee ◽  
Hyung Soo Kim ◽  
Dae Yong Jang ◽  
...  
Keyword(s):  
Health Risks ◽  
Toxic Metal ◽  
Metal Release

Inhibition of carbon fixation as a function of zinc uptake in natural phytoplankton assemblages

1979 ◽  
Vol 59 (4) ◽  
pp. 937-949 ◽  
Author(s):  
Anthony G. Davies ◽  
Jillian A. Sleep
Keyword(s):  
Carbon Fixation ◽  
Natural Populations ◽  
Plant Cells ◽  
Toxic Metal ◽  
Vitamin B ◽  
Phytoplankton Assemblages ◽  
Metal Contents ◽  
Rate Limiting ◽  
Natural Phytoplankton

There is now a substantial body of evidence that the growth rates of phytoplankton in culture are more closely related to the cellular levels of the rate-limiting constituent, be it a nutrient, micronutrient or toxic metal, than to the concentrations in the supporting medium; nitrate, Caperon (1968); phosphate, Fuhs (1969); silicate, Paasche (1973); vitamin B12, Droop (1968); iron, Davies (1970); mercury, Davies (1974); cadmium, Davies (1978a). This has suggested the requirement for a technique which would allow the determination of comparable relationships for natural populations of phytoplankton - how, for instance, their carbon fixation rates depend upon the metal contents of the plant cells. Although the effects of metals upon carbon fixation in phytoplankton assemblages from several different sea areas have already been examined (Knauer & Martin, 1972; Patin et al. 1974; Zingmark & Miller, 1975; Ibragim & Patin, 1976) no data seem to have been obtained on the levels of the metals present in the phytoplankton at the time of the measurements.

scholarly journals Metallo-Graphene Nanocomposite Electrocatalytic Platform for the Determination of Toxic Metal Ions

Sensors ◽  
2011 ◽  
Vol 11 (4) ◽  
pp. 3970-3987 ◽  
Author(s):  
Chandre M. Willemse ◽  
Khotso Tlhomelang ◽  
Nazeem Jahed ◽  
Priscilla G. Baker ◽  
Emmanuel I. Iwuoha
Keyword(s):  
Metal Ions ◽  
Toxic Metal ◽  
Toxic Metal Ions ◽  
Graphene Nanocomposite

Solidification of Metal Finishing Slurry with Cement

1991 ◽  
Vol 24 (12) ◽  
pp. 193-200 ◽  
Author(s):  
J. R. Cláudio
Keyword(s):  
Wastewater Treatment ◽  
Soil Mechanics ◽  
Toxic Metal ◽  
Analytical Determination ◽  
Mechanical Resistance ◽  
Metallic Ions ◽  
Efficient Technology ◽  
Electroplating Wastewater ◽  
Cement Mixtures

From July, 1986 to March, 1987, the author developed laboratory, tests on cementation of electroplating wastewater treatment sludges. Perfomed at the laboratories of Escola Politécnica of the University of São Paulo and of CETESB, tests were conducted with three types of cement produced in Brazil: CPC - Portland Cement, POZ pozzolanic cement and CAF - blast furnace cement. The tests had the following steps:–characterization of electroplating industry wastewater treatment sludge and study of the sludge - cement mixtures;–preparation of sludge - cement mixtures with 3 different water/cement ratios;–measurements of mixture consistency with Casagrande soil mechanics equipment;–determination of leaching quality and resistance to compression of solidified specimen at 3 ages;–analytical determination in the sludge-cement mixture;–test for solubility in water;–analytical determination of cyanide and heavy metals in the cure water of specimen. Results showed that solidification with cement is an efficient technology for the fixation of toxic metal ions such as Cd, Hg and Pb and other metals such as Cr, Ni, Cu or Zn present in large concentrations in electroplating wastewater treatment sludges. With the only exception of Al+++ the other metallic ions determined in the leachate showed concentrations below drinking water standards. As to mechanical resistance after 90 days, the sludge - cement mixtures presented a performance similar to that of structural concrete.

scholarly journals Determination of Glyphosate in human urine from farmers in Mato Grosso-BR

2020 ◽  
Vol 3 ◽  
Author(s):  
Karolyne Gramlich De Melo ◽  
Siomara Regina Ferreira Jacobucci ◽  
Celia Regina Garlipp ◽  
Ângelo Zanaga Trape ◽  
Paulo César Pires Rosa
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Occupational Exposure ◽  
Health Risks ◽  
High Performance ◽  
Urine Samples ◽  
Mato Grosso ◽  
Rural Workers ◽  
Detection And Quantification

This study was conducted based on the evaluation of glyphosate levels present in rural workers in the region of Nova Mutum-MT. We analyzed 90 urine samples from farmers between 2017 and 2018. The samples were analyzed based on the development of the high-performance liquid chromatography (HPLC-FL) method. The results showed that 12% of the farmers presented glyphosate levels, but that the highest concentration determined by the method used was not above the limits allowed by Brazilian regulators. The HPLC-FL method proved to be practical and accurate for the determination of glyphosate in urine samples with limits of detection and quantification of 0.34 and 1.15ng/mL, respectively. These data show the importance of evaluating the occupational exposure of farmers to adopt strategies for the biomonitoring of this region, considering that casual exposures to pesticides can generate health risks, as well as cases of intoxication.

scholarly journals Fluorescence Based Comparative Sensing Behavior of the Nano-Composites of SiO2 and TiO2 towards Toxic Hg2+ Ions

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3082
Author(s):  
Ekta ◽  
Divya Utreja
Keyword(s):  
Solid State Nmr ◽  
Metal Ion ◽  
Ph Effect ◽  
Toxic Metal ◽  
Nano Composites ◽  
Fluorescence Detector ◽  
Fluorescence Signaling ◽  
Ft Ir ◽  
Sensitive Determination

We have synthesized sulfonamide based nano-composites of SiO2 and TiO2 for selective and sensitive determination of toxic metal ion Hg2+ in aqueous medium. Nano-composites (11) and (12) were morphologically characterized with FT-IR, solid state NMR, UV-vis, FE SEM, TEM, EDX, BET, pXRD and elemental analysis. The comparative sensing behavior, pH effect and sensor concentrations were carried out with fluorescence signaling on spectrofluorometer and nano-composites (11) and (12), both were evaluated as “turn-on” fluorescence detector for the toxic Hg2+ ions. The LODs were calculated to be 41.2 and 18.8 nM, respectively of nano-composites (11) and (12). The detection limit of TiO2 based nano-composites was found comparatively lower than the SiO2 based nano-composites.

scholarly journals Health Risk Assessment and Determination of Some Heavy Metals in Commonly Consumed Traditional Herbal Preparations in Northeast Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Mihreteab Meseret ◽  
Gebremariam Ketema ◽  
Haile Kassahun
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Health Risks ◽  
Microwave Plasma ◽  
Daily Intake ◽  
Permissible Limit ◽  
Potential Health ◽  
Herbal Preparations ◽  
Northeast Ethiopia

Background. Most traditional medicines were prepared from plant origins. These plants could be contaminated by heavy metals, pesticides, and/or toxins. Therefore, the aim of the present study was to determine the level of heavy metals such as lead (Pb), cadmium (Cd), chromium (Cr), and copper (Cu) in frequently used traditional herbal preparations sold in Northeast Ethiopia and to estimate their health risks associated with their daily intake. Methods. A total of 6 traditional herbal preparations were randomly collected from local herbal shops of Dessie and Kombolcha town, Northeast Ethiopia. The samples were prepared for analysis by wet digestion method using nitric acid and hydrochloric acid treatment. The accuracy of the method was analyzed by the spike recovery test. Determination of Pb, Cd, Cr, and Cu by microwave plasma atomic emission spectroscopy was made in herbal preparations traditionally used in Dessie and Kombolcha town, Northeast Ethiopia. By calculating estimated daily intake (EDI), hazard quotients (HQ), and Hazard Index (HI) of metals, the health risk associated with the consumption of the analyzed herbal preparations was also evaluated. Results. The levels of heavy metals were in the range of 3.0–3.92 mg/kg for Pb, 5.35–10.7 mg/kg for Cr, and 0.815–12.3 mg/kg for Cu. However, cadmium was not detected in any of the traditional herbal preparations. This study revealed that the level of Pb and Cu in all analyzed samples was within the WHO maximum permissible limit of 10 mg/kg and 40 mg/kg, respectively. The level of Cr in all traditional herbal preparations was beyond the WHO maximum permissible limit (2 mg/kg). From the health point of view, the HQ value of Cr for KD-03 and KD-04 is greater than 1, suggesting potential health risk. Furthermore, the HI value had revealed that the consumption of KD-02, KD-03, and KD-04 samples had the potential of posing health risks to consumers over long-term consumption of herbal preparations. Conclusion. This study showed that most of the metal concentration levels in the herbal products were within the WHO maximum permissible limits. However, all samples had Cr levels above the WHO maximum permissible limit. Based on the results of this study, there would be a noncarcinogenic health risk to the consumer associated with the consumption of some herbal preparations marketed in Northeast Ethiopia.

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