The study of Effective Factors in Mercury Removed from Aqueous Solutions Using Granular Activated Carbon

J Derayat; A Rezaee; SB Mortazavi; Y Yamini; A Khavanin; A Soleimanian

Journal of Kermanshah University of Medical Sciences

Peer-reviewed Medical Quarterly

Current Issue All Issues In Press Accepted Manuscripts Search

Journal Information Boards and Committees Indexing and Listing Sources Journal Metrics Open Peer Review (OPR)Publication Ethics and Malpractice Statement Reviewer and AE Registration Form Contact Us Support

Authors Guide Submit Manuscript

The study of Effective Factors in Mercury Removed from Aqueous Solutions Using Granular Activated Carbon

Author(s):

J Derayat^1,*,

A Rezaee¹,

SB Mortazavi¹,

Y Yamini¹,

A Khavanin¹,

A Soleimanian¹

1Iran

Journal of Kermanshah University of Medical Sciences:Vol. 9, issue 1; e81520

Published online:Jun 19, 2005

Article type:Research Article

Received:Jan 10, 2005

Accepted:May 10, 2005

How to Cite:J DerayatA RezaeeSB MortazaviY YaminiA KhavaninA Soleimanianet al.The study of Effective Factors in Mercury Removed from Aqueous Solutions Using Granular Activated Carbon.J Kermanshah Univ Med Sci.9(1):e81520.

Abstract

Introduction:Wastewaters of chemical, petrochemical, electrical, pharmaceutical and paper industries are the main sources of mercury and its compounds. Mercury is one of the toxic elements, so its removal from water and industrial wastewaters seems to be important and essential. The objective of this study was to investigate effective factors such as PH, contact time, absorbent dose, mixing rate and initial concentration in mercury removed by employing Granular Activated Carbon (GAC).

Materials and Methods: In this study GAC was used as absorbent of the mercury. Mercury solution was prepared by mercury chloride. 136 samples were analyzed and the mixture of samples and activated carbon in 100^cc flasks were shaked. Then the samples filtered and the filtrates were tested to determine the mercury concentration by employing Cold Vapor Atomic Absorption Method at the wavelength of 253.7 nm.

Results: Mercury removal increased at pH from 2 to 4 and optimum pH occurred in the range of 4-8. Increasing processing time to more than 10 min, had no significant effect on the absorption rate of mercury. Removal percentage increased with increasing weight of GAC but the amount of absorbed mercury ion per unit weight decreased from 2.216 mg to 0.0806 mg.

conclusion: Increasing the amount of mercury at pH>4 was due to formation of predominant species of Hg(OH)₂ which retained in micro pores of GAC particles. The kinetic of mercury absorption by GAC was remarkably fast and increasing processing time to more than 10 min up to equilibrium absorption had no significant effect.
The results showed that the mercury removal had increased with increasing weight of GAC. This phenomenon happened as the result of increasing absorbent surface

Keywords

Fulltext

The full text of this article is available on PDF

comments