Role of Activated Carbon Modified by H<SUB>3</SUB>PO<SUB>4</SUB> and K<SUB>2</SUB>CO<SUB>3</SUB> From Natural Adsorbent for Removal of Pb (II) From Aqueous Solutions

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon Letters / 13권 / 3호
· 저자명 : MahboobehManoochehri, AmenehKhorsand, ElhamHashemi

목차

Abstract
1. Introduction
2. Materials and Methods
3. Results and Discussion
References

초록

Most heavy metals are well-known toxic and carcinogenic agents and when discharged into
wastewater represent a serious threat to the human population and the fauna and flora of the
receiving water bodies. The present study aims to develop a procedure for Pb (II) removal.
This procedure is based on using powdered activated carbon, which was prepared from
walnut shells that were generated as plant wastes and modified with potassium carbonate
and phosphoric acid as chemical agents. The main parameters, such as effect of pH, effect of
sorbent dosage, Pb (II) concentrations, and various contact times influence the sorption process.
The experimental results were analyzed by using Langmuir, Freundlich, Tempkin, and
Dubinin-Radushkevich adsorption models. The kinetic study of Pb (II) on activated carbon
from walnut shells was performed based on pseudo- first order and pseudo- second order
equations. The data indicate that the adsorption kinetics follow the pseudo- second order
rate. The procedure was successfully applied for Pb (II) removal from aqueous solutions.

영어초록

Most heavy metals are well-known toxic and carcinogenic agents and when discharged intowastewater represent a serious threat to the human population and the fauna and flora of thereceiving water bodies. The present study aims to develop a procedure for Pb (II) removal.This procedure is based on using powdered activated carbon, which was prepared fromwalnut shells that were generated as plant wastes and modified with potassium carbonateand phosphoric acid as chemical agents. The main parameters, such as effect of pH, effect ofsorbent dosage, Pb (II) concentrations, and various contact times influence the sorption process.The experimental results were analyzed by using Langmuir, Freundlich, Tempkin, andDubinin-Radushkevich adsorption models. The kinetic study of Pb (II) on activated carbonfrom walnut shells was performed based on pseudo- first order and pseudo- second orderequations. The data indicate that the adsorption kinetics follow the pseudo- second orderrate. The procedure was successfully applied for Pb (II) removal from aqueous solutions.

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