Heavy Metals | भारी धातुएँ
What are Heavy Metals? | Heavy Metals क्या हैं?
The term heavy metal is commonly used for metallic elements with relatively high density that may become toxic at sufficiently high concentrations.
heavy metal term सामान्यतः relatively high density वाले metallic elements के लिए use होता है जो sufficiently high concentrations पर toxic हो सकते हैं।
Examples | उदाहरण
Commonly discussed toxic heavy metals include mercury, cadmium, lead, chromium and thallium. Arsenic is technically a metalloid but is often grouped with toxic heavy metals in environmental-health discussions.
commonly discussed toxic heavy metals में mercury, cadmium, lead, chromium और thallium शामिल हैं। Arsenic technically metalloid है, लेकिन environmental-health discussions में इसे अक्सर toxic heavy metals के साथ group किया जाता है।
Natural Presence | प्राकृतिक उपस्थिति
Heavy metals occur naturally in the Earth's crust and cannot be destroyed or biodegraded into nothing.
heavy metals Earth's crust में naturally occur करते हैं और इन्हें completely destroy या biodegrade नहीं किया जा सकता।
Human Exposure | मानव संपर्क
Humans may be exposed to heavy metals through food, drinking water, air, occupational activities and contaminated environments.
humans food, drinking water, air, occupational activities और contaminated environments के through heavy metals के contact में आ सकते हैं।
Essential Trace Elements | आवश्यक Trace Elements
Some metals such as copper and zinc are essential in trace amounts for normal metabolism, while selenium, though not a metal, is also an essential trace element.
copper और zinc जैसे कुछ metals trace amounts में normal metabolism के लिए essential हैं, जबकि selenium metal नहीं है लेकिन essential trace element है।
Toxicity | विषाक्तता
At high concentrations, several heavy metals can cause poisoning and damage the nervous system, kidneys, liver, blood or other organs.
high concentrations पर several heavy metals poisoning cause कर सकते हैं और nervous system, kidneys, liver, blood या other organs को damage कर सकते हैं।
Sources of Heavy Metal Poisoning | Heavy Metal Poisoning के स्रोत
- Contaminated drinking water, including old lead pipes. / contaminated drinking water, including old lead pipes।
- Industrial emissions and waste. / industrial emissions और waste।
- Mining and metal-processing activities. / mining और metal-processing activities।
- Food-chain contamination. / food-chain contamination।
Bioaccumulation | जैव संचय
Bioaccumulation refers to an increase in the concentration of a chemical in an organism over time when uptake occurs faster than metabolism or excretion.
Bioaccumulation उस process को कहते हैं जिसमें किसी organism में chemical की concentration समय के साथ बढ़ती जाती है क्योंकि uptake, metabolism या excretion से faster होता है।
Water Pollution | जल प्रदूषण
Heavy metals can enter rivers, lakes and groundwater through industrial waste, consumer waste, mining, acidic drainage and soil erosion.
heavy metals industrial waste, consumer waste, mining, acidic drainage और soil erosion के through rivers, lakes और groundwater में enter कर सकते हैं।
Major Metals of Concern | प्रमुख चिंताजनक धातुएँ
Mercury, lead and cadmium are among the most serious toxic metals because of their persistence, ability to bioaccumulate and capacity to travel through environmental systems.
Mercury, lead और cadmium सबसे serious toxic metals में से हैं क्योंकि ये persistent होते हैं, bioaccumulate कर सकते हैं और environmental systems में travel कर सकते हैं।