Ehsan Neshan Shahjooei - Faculty of chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran
Mohsen Mehdipour Ghazi - Faculty of chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran
Farshad Varaminian - Faculty of chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran

The main source of arsenic intake by humans is to drink arsenic contaminated water. In many countries, exposure to inert organic arsenic is a concern. In the Asia continent, more than 100 million people are exposed to high-concentration arsenic groundwater, which is 10 ppb more than the WHO guidelines. Long-term exposures of arsenic to arsenic lead to skin lesions, vascular diseases, blood pressure and various types of cancer. There are several methods for removing arsenic from drinking water, which is a conventional and conventional method for absorbing adsorbents with absorbent species. This research has been used with natural mesh zeolite with mesh (0.19-1.16 mm) of 12,15,20 and 25grams. The concentration of arsenic in all experiments according to the source of contamination in one of the wells of the province Semenan ppb40, the temperature of the experiments at ambient temperature and the pH between 4.5 and 5.5 (kept below the pHPZC, the point of zero charge). The amount of arsenic after an hour was 3.08 - 1.92 ppb, with a percentage of adsorption of arsenic from 21.9% to 94.71%. This amount is below the limit for arsenic in accordance with the WHO guidelines.

Arsenic, Adsorption, modified zeolite clinoptilolite, Drinking Water