Carcinogenic properties of Chromium(VI) have been studied extensively and reported. The majority of the environmental releases of chromium are from industrial sources. Rhodamine B is a synthetic dye widely used as colourant in the manufacture of textiles and food stuffs. Rhodamine dyes present in drinking water could lead to subcutaneous tissue borne sarcoma which is highly carcinogenic. Other toxicities like reproductive and neurotoxicity have been investigated and proved. The work reported involves the removal of Cr(VI) as well as Rhodamine B dye using pine needles by the process of adsorption. The adsorption studies were performed by batch process and the detection done using UV–visible spectrophotometer at 540 nm for Cr(VI) and 554 nm for Rhodamine B. Various parameters like pH, concentration of adsorbent, mass of adsorbate, time of contact were optimized. The percentage efficiency for removal under optimized conditions, of Cr(VI) and Rhodamine B dye was up to 96 and 92% respectively. The adsorption studies were performed using Freundlich and Langmuir adsorption isotherms as well as the kinetic and thermodynamic parameters have also been determined. This technique can be effectively used for the detoxification of water by the removal of metal ions and dyes obtained from industries.
Spectrophotometry Hexavalent chromium Rhodamine B Pine needles
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The authors are grateful to Amity University for providing the necessary infrastructure and facilities for performing the experiments and doing the study.
Conflicts of Interest
The authors declare no conflict of interest.
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