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Int. J. Environ. Res. Public Health 2016, 13(1), 69; doi:10.3390/ijerph13010069

Synthesis of Minerals with Iron Oxide and Hydroxide Contents as a Sorption Medium to Remove Arsenic from Water for Human Consumption

1
Instituto Mexicano de Tecnología del Agua, Paseo Cuahnáhuac 8532, Col. Progreso, Jiutepec, CP. 62550 Morelos, México
2
Universidad Politécnica del Estado de Morelos, Paseo Cuauhnáhuac 566, Col. Lomas del Texcal, Jiutepec, CP. 62550 Morelos, México
*
Author to whom correspondence should be addressed.
Academic Editors: Ravi Naidu and Mohammad Mahmudur Rahman
Received: 25 September 2015 / Revised: 8 December 2015 / Accepted: 15 December 2015 / Published: 23 December 2015
(This article belongs to the Special Issue Arsenic in Drinking Water: Current Perspectives and Future Directions)
View Full-Text   |   Download PDF [4134 KB, uploaded 23 December 2015]   |  

Abstract

Arsenic has been classified as a toxic and carcinogenic chemical element. It therefore presents a serious environmental problem in different regions of the country and the world. In the present work, two adsorbent media were developed and evaluated to remove arsenic from water in the Pájaro Verde mine shaft, Huautla, Tlaquiltenango, Morelos. The media were synthesized and characterized, obtaining a surface area of 43.04 m2·g−1 for the goethite and 2.44 m2·g−1 for silica sand coated with Fe(III). To conduct the sorption kinetics and isotherms, a 23 factorial design was performed for each medium in order to obtain the optimal conditions for the factors of arsenic concentration, pH and mass of the adsorbent. The best results were obtained for goethite, with a removal efficiency of 98.61% (C0 of As(V) 0.360 mg·L−1), and an effluent concentration of 0.005 mg·L−1, a value that complies with the modified Official Mexican Standard NOM-127-SSA1-1994 [1] and WHO guidelines (2004) [2]. The kinetic equation that best fit the experimental data was the pseudo-second-order, resulting in the highest values for the constants for synthetic goethite, with a rate constant sorption of 4.019·g·mg−1·min−1. With respect to the sorption isotherms, both media were fitted to the Langmuir-II linear model with a sorption capacity (qm) of 0.4822 mg·g−1 for goethite and 0.2494 mg·g−1 for silica sand coated with Fe(III). View Full-Text
Keywords: arsenic; kinetic; experimental design; isotherm; adsorbent media arsenic; kinetic; experimental design; isotherm; adsorbent media
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Garrido-Hoyos, S.; Romero-Velazquez, L. Synthesis of Minerals with Iron Oxide and Hydroxide Contents as a Sorption Medium to Remove Arsenic from Water for Human Consumption. Int. J. Environ. Res. Public Health 2016, 13, 69.

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