Use of a Smart Natural Material to Remove Zinc and Cadmium from Water

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چکیده

Heavy metals, such as, cadmium, zinc, Strontium and Arsenic have different chemical and physical properties. Also, each metal has its specific toxicological effects; in general, the contamination caused by heavy metals can have different effects in a human health. It is worth to summarize the effect of each element on human health. Scientific literature shows that cadmium affects the cardiovascular system in several ways. Much of the literature supports a role for Cd in inducing hypertension [1] and diabetes [2], with apparent direct toxic impact on gene transcription in the vascular endothelium [3]. The effect of Zinc is different since this element has known beneficial and necessary effects on a human body. Even though Zinc is vital to many bodily functions, at higher concentrations, toxic effects take control. At higher concentrations, zinc can become potentially serious if the dose exceeds 450 mg a day [4]. Strontium is not highly toxic but strontium and calcium have similar chemistry therefore strontium can accumulate in bone and affect bone formation at sufficiently high doses [5]. Arsenic is introduced into water through the dissolution of rocks, minerals and ores, from industrial effluents, including mining wastes, and via atmospheric deposition [6]. The predominant form is arsenic (III. Long-term exposure to arsenic in drinkingwater is causally related to increased risks of cancer in the skin, lungs, bladder and kidney, as well as other skin changes such as hyperkeratosis and pigmentation hanges) [7,8].

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تاریخ انتشار 2018