Effect of Heterotrophic Bacteria in Mashhad Sewage on Removal of Mercury From Used Fluorescent Lamps

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ALIDADI HOSSEIN; Mohammad Hosseini Fatemeh; Gohari Samaneh; Bonyadi Ziaeddin

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Journal: Journal of Research in Environmental Health Year:2020 | Volume:6 | Issue:3 Page(s): 221-228

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Title

Effect of Heterotrophic Bacteria in Mashhad Sewage on Removal of Mercury From Used Fluorescent Lamps

Author(s)

ALIDADI HOSSEIN | Mohammad Hosseini Fatemeh | Gohari Samaneh | Bonyadi Ziaeddin | Issue Writer Certificate

Keywords

Fluorescent LampQ1

MercuryQ2

BiosorptionQ2

Heterotrophic Wastewater BacteriaQ1

Abstract

Background and Aim: Today, Fluorescent Lamps are the most common light sources in the world and Iran. Mercury in these lamps may enter the environment and exert harmful effects. The present study aimed to investigate the effect of heterotrophic bacteria in wastewater on Mercury removal from Fluorescent Lamps. Materials and Methods: In this study, different components of lamps were separated using a crushing machine and then, Mercury was separated from the phosphorus powder by acid washing. Bacteria isolated from wastewater were exposed to acid wash-extracted Mercury and the Mercury content in the lamps was measured by atomic absorption spectrophotometry. The highest concentration of Mercury extracted from lamps was 86. 03 ppb at the ratio of HCl to HNO3 of 4: 1, and the lowest Mercury concentration was 14. 03 ppb at HCl to HNO3 of 1: 1. The one-way ANOVA test was used to analyze the amount of Mercury extracted from the phosphorous powder of lamps at different ratios of acids. Results: The results of this study showed that heterotrophic bacteria could reduce the Mercury levels to less than 5 μ g/L. Besides, 19 bacteria isolated from wastewater were resistant to Mercury chloride at concentrations of 5 and 10 mg. Also, 10 bacteria could reduce Mercury. The highest rate of Mercury reduction (92. 24%) was related to Pseudomonas marginalis and the lowest rate (62. 47%) was related to Pseudomonas simiae. Conclusion: This study showed that sewage heterotrophic bacteria can be used as an efficient, low-cost, and environmentally friendly method for the detoxification of Mercury from out-of-date Fluorescent Lamps.

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APA: Copy

ALIDADI, HOSSEIN, Mohammad Hosseini, Fatemeh, Gohari, Samaneh, & Bonyadi, Ziaeddin. (2020). Effect of Heterotrophic Bacteria in Mashhad Sewage on Removal of Mercury From Used Fluorescent Lamps. JOURNAL OF RESEARCH IN ENVIRONMENTAL HEALTH, 6(3 ), 221-228. SID. https://sid.ir/paper/385655/en

Vancouver: Copy

ALIDADI HOSSEIN, Mohammad Hosseini Fatemeh, Gohari Samaneh, Bonyadi Ziaeddin. Effect of Heterotrophic Bacteria in Mashhad Sewage on Removal of Mercury From Used Fluorescent Lamps. JOURNAL OF RESEARCH IN ENVIRONMENTAL HEALTH[Internet]. 2020;6(3 ):221-228. Available from: https://sid.ir/paper/385655/en

IEEE: Copy

HOSSEIN ALIDADI, Fatemeh Mohammad Hosseini, Samaneh Gohari, and Ziaeddin Bonyadi, “Effect of Heterotrophic Bacteria in Mashhad Sewage on Removal of Mercury From Used Fluorescent Lamps,” JOURNAL OF RESEARCH IN ENVIRONMENTAL HEALTH, vol. 6, no. 3 , pp. 221–228, 2020, [Online]. Available: https://sid.ir/paper/385655/en

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