Articles Related to Heavy Metal

The results obtained from heavy metal pollution assessment of River Ureje using Heavy Pollution Index (HPI) and Contamination Index (Cd ). HPI values at upstream and downstream point of the river, Cd, Pb, Cr had high pollution load that exceeded threshold value of 100 while Mn, Cu, Zn, Ni had low pollution index which are below threshold value. This indicated that high pollution status of Cd, Pb, Cr were observed because they compete with other essential metallic cations for binding sites and inhibits enzyme activity while there is no pollution presence of Zn, Mn, Ni, Cu. Cd value results in both upstream and downstream point revealed that Zn, Cd, Cu, Pb had a low contamination index below <1 contamination value and tends to show no effect on aquatic environment and drinking water quality. However, Cr, Ni had medium contamination compared to (Cd=1-3) Cd value, this indicates slight contamination of these heavy metals and have slight effect on drinking water quality and aquatic life present while Manganese had high Cd value compared to (Cd>3) Cd value which to tends have high effect on drinking water quality and aquatic system. In conclusions, this study revealed that High level of HPI above critical index value was observed for Cd, Cr, Pb while Mn shows high Cd far above contamination index value.

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This study reports the adsorption capacity of copper Cu (II) and nickel Ni (II) of biochar obtained from peanut shell. The kinetics and equilibrium of biosorption were examined in detail. Two kinetic models (pseudo-first order and pseudo-second order) were used to correlate the experimental data and to determine the kinetic parameters. Two well-known adsorption isotherms were chosen to describe the biosorption equilibrium (Langmuir and Freundlich). The equilibrium isotherms showed that modified peanut shells possess high affinity, sorption capacity for Cu (II) and Ni (II) ions, sorption capacities of 37.443 mg/g Cu (II) and 28.626 mg/g Ni (II) biomass, respectively. All results showed that peanut shells biomass is an attractive, alternative low-cost bio sorbent for removal of heavy metal ions from aqueous media, therefore biomass materials find good application prospects.

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The objective of this investigation was to evaluate the efficacy and safety of purified Shilajit in moderately arthritic dogs. Ten client-owned dogs in a randomized double-blinded study received either a placebo or Shilajit (500 mg) twice daily for a period of five months. Dogs were evaluated each month for physical condition (body weight, body temperature, heart rate, and respiration rate) and pain associated with arthritis (overall pain, pain from limb manipulation, and pain after physical exertion).

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