environment engineering science

Key words: Sorption; Pb2+; Brick powder; Kinetics; Isotherm; Building rubbish
Fo
rP
ee
rR
ev
iew
*
To whom correspondence should be addressed. Email: yezhengfang@, liyf@
Sorption of Pb2+ from aqueous solutions by brick powder
Yaolong Wang2, Lincheng Zhou2, Yanli Yue2, Yun Zhang2, Zhengfang Ye1*, Xiaoning Jia2, Yanfeng Li2* 1 Department of Environmental Engineering, Key Laboratory of Water and Sediment Sciences of the Ministry of Education, Peking University, Beijing 100871, P.R.China 2 College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, P.R.China
Pe
er
Re
vi
ew
Page 1 of 27
Environmental Engineering Science
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Journal:
Environmental Engineering Science EES-2011-0337 Original Article 11-Jul-2011
Manuscript ID: Manuscript Type:
Date Submitted by the Author: Complete List of Authors:
Mary Ann Liebert, Inc., 140 Huguenot Street, New Rochelle, NY 10801
r Fo
Keyword:
Wang, Yaolong; lanzhou university, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology Zhou, Lincheng; Lanzhou University, college of chemistry and chemical engineering yue, yanli; College of Chemistry and Chemical Engineering, Biochemical Engineering & Environmental Technology zhang, yun; Lanzhou University, college of chemistry and chemical engineering, Institute of Biochemical Engineering & Environmental Technology Ye, Zhengfang; Peking University, Department of Environmental Engineering Jia, Xiaoning; Lanzhou university, College of Chemistry and Chemical Engineering,Institute of Biochemical Engineering & Environmental Technology Li, Yanfeng; Lanzhou university, college of chemistry and chemical engineering Chemical and Physical Treatment Processes for Water and Wastewater, Adsorption < Chemical and Physical Treatment Processes for Water and Wastewater
Introduction With the growth of industrial, more and more pollutants are released into the environment. Contamination of the environment from a variety of pollutants sources has become an increasingly serious problem in recent years. The presence of heavy metals in the aquatic environment is a major concern due to their extreme toxicity towards aquatic life, human beings, and the environment (Han et al., 2006a). Pb2+ is one of the most toxic metals that affect the environment (World Health Organization, Geneva, 1988). Even at low concentrations, it can be toxic to organisms, including humans. Pb2+ is accumulated in the human system through a number of processes like breathing in fumes from industrial environment (lead smelting, refining and manufacturing industries), ingesting plants or food grown on contaminated soils, drinking contaminated water and using lead (leaded-glass, ceramics)(Unuabonah et al., 2007). The Toxic effects of Pb2+ on neuro behavioural development and brain cell function (Krishna G Bhattacharyya, Arunima Sharma, 2004; Boujelben et al., 2009) have been investigated. The maximum allowable limit of Pb2+ in drinking water is 0.05 mg/L (World Health Organization, 1984). Among the various treatment processes, adsorption is one of the effective and attractive processes to remove Pb2+ in view of its efficiency and the ease with which it can apply to the treatment of waste water containing Pb2+ ion. Many adsorbents have been reported for the removal of Pb2+ from aqueous solution such as betonite (S. Zhu et al., 2008), olive stones (Fiol, Nuria, 2006), kaolin and ball clay(Brigatti et al., 2000), fly ash(Naiya, Tarun Kumar et al., 2009), lignite material (Havelcova, Martina et al., 2009), peat(Bulgariu, Laura;et al., 2011), groundnut husk (Le, Huu Thieng et al., 2009) and peanut shell carbon (Tao et al., 2008), bagasse(Rao, 2003), Fe(III)/Cr(III) sludge(Namasivayam et al., 1995), Water treatment sludge (Zhou et al., 2010), crude coniferous bark (Dupont et al., 2002), sawdust (Syed MuzaffarAli Andrabi, 2011), sugar beet pulp(Reddad et al., 2002), palm kernel fibre (Ho et al., 2005), waste biomass (Horshfall et al., 2003), and on Azadirachta indica (Neem) leaf powder(Bhattacharyya et
Mary Ann Liebert, Inc., 140 Huguenot Street, New Rochelle, NY 10801
Environmental Engineering Science来自Page 2 of 27
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Abstract
Batch sorption experiments were conducted using brick powder (BP) an important part of the building rubbish, as an adsorbent to adsorb Pb2+ from aqueous solutions in which experimental parameters were studied including solution pH, contact time, adsorbent dose, initial concentration of Pb2+, temperature and ionic strength. The equilibrium isotherms were determined at pH=4.0 under constant ionic strength and at different temperatures. The results showed that the maximum adsorption capacity of Pb2+ (96.8 mg/g) was obtained at 1000 mg/L with an initial pH value of 4.0 and temperature of 293K. Removals of about 70% occurred in 30min, and equilibrium was attained around 120 min. Various kinetic models such as the pseudo-first, pseudo-second and intraparticle diffusion were testedand it was found that the kinetic adsorption fitted well to the pseudo-second-order model and the corresponding rate constants were acquired. Furthmore, the equilibrium data for the adsorption of Pb2+ on BP was tested with various adsorption isotherm models among which Freundlich model was found to be suitable for the Pb2+ adsorption.
Environmental Engineering Science
Environmental Engineering Science Manuscript Central: /environmental
Sorption of Pb2+ from aqueous solutions by brick powder