metals

The article describes the gamma activation analysis method used to determine the gold content in rock samples using the Aura measuring complex. The physicochemical basis of gold extraction in the process of cyanide leaching is considered. The technology for extracting gold from solutions of tailing waste “ponds” of tailings dumps of hydrometallurgical plants of the Joint Stock Company “Navoi Mining and Metallurgical Combine” (JSC NMMC) is presented. It has been shown that in the dynamic mode of sorption of tailing waste solutions acidified to pH = 3.3÷3.5 through AM-2B and VP-1P ion exchange resins, gold is sorbed on the AM-2B anion exchanger up to 3.9 mg/g and on the VP-1P anion exchanger up to 1.5 mg/g. It has been shown that when solutions of tailing waste are exposed to ammonia, ammonia complex compounds of base metal impurities are formed, which decompose, while the gold cyanide complex does not decompose and is sorbed on the AM-2B ion exchange resin up to 3.0 mg/g. The mechanisms of the chemical reactions of the process of extracting gold from tailing waste and the technological scheme of the installation for extracting gold from solutions of the tailing waste “pond” are presented.

Background: In addition to being used to keep babies clean and comfortable, baby care products may also include hazardous substances that are harmful to the baby’s health. To safeguard the health of new-borns, it is crucial to understand the potential toxins included in baby care products.Objective: This paper focuses on the very bothering aspect of baby care products. The objective of this study is to identify and summarise the effect of toxicants present in baby care products including their source, exposure, toxicity, and adverse effects on infants.Methods: Utilizing several internet databases including various open source, including PubMed, Scopus, and research gate, a thorough literature search was carried out. The review covered articles that were written in English and published in last fifteen years. Studies reporting on the sources, effects, and potential exposure pathways of toxicants found in infant care products have been included.Result: The study deals with a list of harmful toxicants like phthalates, asbestos, parabens, heavy metals, sodium laurel sulphates, etc., and their sources and modes of exposure. Exposure to toxicants such as phthalates, asbestos, parabens, heavy metals, and sodium laurel sulphates can lead to cancer, developmental disorders, and endocrine disruption.Conclusion: It can be concluded that baby care products are having adverse effects on infants, on their skin or health, or in other ways. To avoid the same, the root cause of it should be avoided, which is the inclusion of toxicant chemicals in such baby care products. Parents and caretakers should be aware of the dangers of toxicant chemicals in baby care products and use non-toxic products to protect their babies' health, while manufacturers should use safer components. Government and authorized agencies should enforce restrictions.