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In modern parlance, arsenic is viewed as being synonymous with “toxic”. by Dr. Nitish Priyadarshi As old as recorded history, arsenic has existed through the centuries as a curative, a pigment, a cosmetic, on mirrors, part of alchemical lore, and most notoriously, the deadliest of poisons. In its various forms- as tasteless and odorless arsenic trioxide, the gold-bearing yellow arsenic sulfide, the deadly gas arsine, the practical alloy copper-arsenic, common pesticide white arsenic, and the electronics staple gallium arsenide-arsenic has served with fascinating ease human impulses both noble and wicked. The long history of arsenic in science, medicine and technology has been over shadowed by its notoriety as a preferred poison in homicides. In modern parlance, arsenic is often viewed as being synonymous with “toxic”. Widespread arsenic contamination of groundwater has led to a massive epidemic of arsenic poisoning in India and Bangladesh and neighbouring countries. Presently 42 major ...

Sky above Ranchi city is covered with red clouds. by Dr. Nitish Priyadarshi On 19th night layers of Red coloured clouds were seen in the sky of Ranchi city, the capital of Jharkhand State of India. These colour is due to pollution mixed with reflection of city light. From last several days lots of fire crackers were used due to Diwali and other festivals.

Toxic smoke is seen in the sky above Ranchi city. by Dr. Nitish Priyadarshi. In the above picture stagnant toxic smoke is seen above Ranchi city in Jharkhand state of India. It is due to the fire crackers and other explosives burnt during Diwali night and the next day. Such smokes are contaminated with toxic heavy metals injurious to lungs, eyes etc. It may cause breathing problems, irritation in eyes, increase in blood pressure etc. If it rains it may also cause acid rain. Lighting firecrackers increases the sulphur dioxide level 200-fold, above the safety levels prescribed by the World Health Organisation. More chemicals are added to give colour, Metals, such as aluminum , magnesium , and titanium , burn very brightly and are useful for increasing the temperature of the firework. Fireworks produce smoke and dust that may contain residues of heavy metals , sulfur-coal compounds and some low concentration toxic chemicals. These by-products of fireworks combustion will vary de...