Uppal, Himani and Chawla, Sneha and Joshi, Amish G. and Haranath, Divi and Vijayan, Narayanasvamy and Singh, Nahar (2019) Facile chemical synthesis and novel application of zinc oxysulfide nanomaterial for instant and superior adsorption of arsenic from water. Journal of Cleaner Production , 208. pp. 458-469. ISSN 0959-6526

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Abstract

Several methods such as hydrothermal, co-precipitation, solution combustion, and pulsed laser deposition have been reported for the synthesis of zinc oxysulfide (ZnOxS1-x). The photocatalytic activity of ZnOxS1-x for the inactivation of organic pollutants and bacteria are well-known. This paper is the first ever study on novel application of ZnOxS1-x as an instant and excellent adsorbent for carcinogenic arsenic (As) species present in water. For this, ZnOxS1-x nanomaterial has been synthesized using a facile and economical chemical precipitation method. As per WHO guidelines, the maximum permissible concentration of As in potable water is 10 mu g/L. However, ZnOxS1-x nanomaterial efficiently adsorb As within this concentration in about a minute without deteriorating the quality of water. The adsorption efficiency of ZnOxS1-x nanomaterial has been estimated as a function of pH, adsorbent dose, time and concentration of As. Interestingly, the adsorption efficiency was >99% at each pH with highest (99.9%) in 6-8 pH range. The adsorption capacity of ZnOxS1-x was calculated to be 299.4 mg/g, which is superior to several reported adsorbents. An electrostatic interaction was investigated between positively charged ZnOxS1-x and negatively charged oxyanionic As species. The synthesis and adsorption process were also augmented by several spectral and microscopic techniques.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Engineering > Engineering (General) Environmental Science > Environmental Geology Environmental Science > Environmental Geology Environmental Science > Environmental Geology Environmental Science > Environmental Geology
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	19 Aug 2026 11:10
Last Modified:	19 Aug 2026 11:10
URI:	https://npl.csircentral.net/id/eprint/4202

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