Abstract
Arsenic is a common constituent of the earth's crust. It is a potential carcinogenic element which presents in natural water systems as a result of both natural and anthropogenic activities. Arsenic poisoning is a burning issue for some parts of the world, and the complete removal of arsenic from water is still being studied. Arsenic is readily soluble and transports easily through groundwater, and, in addition to a human health problem, arsenic flow can create a vulnerable situation in the underground oil and gas reservoir. Some underground oil and gas reservoirs are made up of porous and permeable rocks. The properties of these rocks can cause the arsenic to be adsorbed when they come in contact. This research was focused on finding a limestone filter for purification of arsenic-rich water, which can also prove the possible arsenic effect on a limestone reservoir. Three types of limestone were considered to measure the propagation rate of arsenic through them. Results show that limestone can adsorb a significant amount of arsenic from aqueous streams and can be used as a potential filter for arsenic removal for a small community or for industrial purposes. Limestone can inhibit the release of arsenic water in nature. The predictive numerical model shows that oil and gas reservoirs are not in threat where there is abundant limestone available on the earth crust.
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