Removal of inorganic As5+ from a small drinking water system | Zendy

Marjana Simonič | Zendy

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Removal of inorganic As5+ from a small drinking water system

Author(s) -

Marjana Simonič

Publication year - 2009

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0901085s

Subject(s) - arsenic , adsorption , chemistry , environmental chemistry , water treatment , chemical engineering , environmental science , environmental engineering , organic chemistry , engineering

The drinking water from a small drinking water system contained arsenic in a concentration of about 50 μg/L. Chemical analyses showed that the pentavalent form of arsenic was present. Since the MCL value is 10 μg/L, it was necessary to implement a technological treatment to make the water suitable for drinking. In order to do so, two technologies were suggested: activated alumina and α-FeOOH (TehnoArz, TA) adsorption media. Experiments using both adsorption media were performed on a laboratory scale. It was possible to remove arsenic to below 1 μg/L. The maximal adsorption capacity was found to be 12.7 mg of As5+ per gram of α-FeOOH. Moreover, all the important physico-chemical parameters of the water remained practically unchanged after the treatment. Only a slight release of iron from the media was observed. The Fe-As bond was studied by means of chemical analysis and X-ray powder diffraction. Finally, in addition to showing the capability of arsenic removal by α-FeOOH, a comprehensive optimization of the technological parameters of the selected technology is provided.

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