Login Register Cart 0
Generic placeholder image

Recent Innovations in Chemical Engineering

Editor-in-Chief

ISSN (Print): 2405-5204
ISSN (Online): 2405-5212

Back
Journal Home About Journal Editorial Board Journal Insight Current Issue Volumes/Issues
Subscribe
Research Article

Study on Adsorption of Ag+ by Waste Tea: Adsorption Kinetics, Thermodynamics, Isotherm Properties

Author(s): Qing-Zhou Zhai* and Xiao-Dong Li

Volume 16, Issue 1, 2023

Published on: 04 April, 2023

Page: [69 - 85] Pages: 17

DOI: 10.2174/2405520416666230214100228

Price: $65

conference banner
Abstract

Aims: In order to explore the adsorption effect of tea on heavy metal ions in industrial wastewater, Ag+ is used as the research object in this paper.

Background: In recent years, heavy metal pollution in water has seriously affected human health and the stability of the ecological environment. In order to reduce the harmfulness of heavy metals, various countries have issued a variety of control standards for heavy metals in water, but there are still great restrictions in the prevention and control technology and level of heavy metal pollution. Therefore, how to effectively treat heavy metal pollution in water has become a hot topic in the field of water pollution management.

Objective: The optimized conditions of the adsorption are obtained. Properties of the thermodynamics, adsorption kinetics, and adsorption isotherm are obtained.

Methods: In order to determine the best adsorption conditions for Ag+, the influence of factors such as pH value, initial concentration of Ag+, tea dosage, contact time, and adsorption temperature on the adsorption effect of tea is studied. The thermodynamics, adsorption kinetics, and adsorption isotherm are studied.

Results: The results showed that when the temperature is 25°C, the pH of the solution was 3.5, the amount of adsorbent was 2.5 g/L, the initial concentration of Ag+ was 125 μg/L and the contact time was 30min, the adsorption rate was highest, reaching 98.11%. The thermodynamic study of adsorption showed that at room temperature and above (298.15-318.15 K), ΔG° < 0, indicating that the adsorption process can be spontaneous. The value of ΔG° in this study is between -20 and -80 kJ/mol, indicating that this is a physicochemical adsorption process. ΔH° = -80.111 kJ/mol < 0, indicating that the adsorption process of Ag+ is exothermic. ΔS° = -188.977 J/(mol·K) < 0, indicating that the adsorption is a process of entropy reduction. The adsorption kinetics study showed that the adsorption equilibrium capacity of different concentrations had a large gap with the experimental results, and the correlation coefficient was small by fitting the quasi-first-order kinetic equation and combining it with the experimental measurements. When the quasi-second-order kinetic equation was used, the calculated values of the equilibrium adsorption capacity of each concentration were basically close to the experimentally measured values, and the correlation coefficient was large, so the kinetics of the adsorption system of Ag+ by tea conformed to the quasi-second-order kinetic equation. The adsorption isotherm of this adsorption process is accorded with the Freundlich model and belonged to heterogeneous adsorption.

Conclusion: Tea is a good adsorbent and has the potential for adsorption of Ag+.

« Previous
Graphical Abstract

[1]
Fu F, Wang Q. Removal of heavy metal ions from wastewaters: A review. J Environ Manage 2011; 92(3): 407-18.
[http://dx.doi.org/10.1016/j.jenvman.2010.11.011] [PMID: 21138785]
[2]
Ahmed AMM, Ali AE, Ghazy AH. Adsorption separation of nickel from wastewaterby using olive stones, Adv. J Chem-Section A 2019; 2: 79-93.
[3]
VandeVoort AR, Arai Y. Environmental chemistry of silver in soils: Current and historic perspective. Adv Agron 2012; 114: 59-90.
[http://dx.doi.org/10.1016/B978-0-12-394275-3.00005-5]
[4]
Naushad M. Surfactant assisted nano-composite cation exchanger: Development, characterization and applications for the removal of toxic Pb2+ from aqueous medium. Chem Eng J 2014; 235: 100-8.
[http://dx.doi.org/10.1016/j.cej.2013.09.013]
[5]
Zhou Y, Zhang M, Hu X, Wang X, Niu J, Ma T. Adsorption of cationic dyes on a cellulose-based multicarboxyl adsor-bent. J Chem Eng Data 2013; 58(2): 413-21.
[http://dx.doi.org/10.1021/je301140c]
[6]
Naushad M, Ahamad T, Sharma G, et al. Synthesis and characterization of a new starch/SnO2 nanocomposite for efficient adsorption of toxic Hg2+ metal ion. Chem Eng J 2016; 300: 306-16.
[http://dx.doi.org/10.1016/j.cej.2016.04.084]
[7]
Ma Y-X, Xing D, Tuan Y-X, Du X-Y, La P-Q. Fabrication of amino-functionalized magnetic graphene oxide nanocom-posites for adsorption of Ag(I) from aqueous solution. Environ Eng Sci 2007; 35(1): 1-12.
[8]
Zeng Q, Sun W, Zhong H, He Z. Efficient and selective removal of Ag+ as nano silver particles by the composite of SiO2 supported nano ferrous oxalate. Environ Res 2021; 202: 111696.
[http://dx.doi.org/10.1016/j.envres.2021.111696] [PMID: 34331922]
[9]
Zhao J, Wang S, Zhang L, Wang C, Zhang B. Kinetic, isotherm, and thermodynamic studies for Ag(I) adsorption using carboxymethyl functionalized poly(glycidyl methacrylate). Polymers (Basel) 2018; 10(10): 1090.
[http://dx.doi.org/10.3390/polym10101090] [PMID: 30961015]
[10]
Zhang C, Li X, Zheng T, Zhao R, Wang C. Acyl thioacetamide-group chelated nanofiber to adsorb silver ions from aqueous systems. Chem Res Chin Univ 2014; 30(4): 685-9.
[http://dx.doi.org/10.1007/s40242-014-4190-z]
[11]
Alandis NM, Mekhamer W, Aldayel O, Hefne JAA, Alam M. Adsorptive applications of montmorillonite clay for the removal of Ag(I) and Cu(II) from aqueous medium. J Chem 2019; 2019: 7129014.
[12]
Nitayaphat W, Jintakosol T. Removal of silver(I) from aqueous solutions by chitosan/bamboo charcoal composite beads. J Clean Prod 2015; 87: 850-5.
[http://dx.doi.org/10.1016/j.jclepro.2014.10.003]
[13]
Li Q, Zhang Y, Ren HJ. Adsorption of Cr(VI) on peanut shells modified by H2O2. Yingyong Huagong 2019; 48(2): 272-5.
[14]
Geng AF, Zhai QZ. Determination of nickel in tea with arsenazo-III by spectrophotometry. J Chem Pharm Res 2014; 6(1): 521-3.
[15]
Ali A, Bilal M, Khan R, Farooq R, Siddique M. Ultrasound-assisted adsorption of phenol from aqueous solution by using spent black tea leaves. Environ Sci Pollut Res Int 2018; 25(23): 22920-30.
[http://dx.doi.org/10.1007/s11356-018-2186-9] [PMID: 29858994]
[16]
Liu L, Fan S, Li Y. Removal behavior of methylene blue from aqueous solution by tea waste: kinetics, isotherms and mechanism. Int J Environ Res Public Health 2018; 15(7): 1321-7.
[http://dx.doi.org/10.3390/ijerph15071321] [PMID: 29937528]
[17]
Xue G. Color reaction of multicomponet complex in the system of silver-5-Br-PADAP-triethalamine-sodium laural sul-phate. Chin J Anal Chem 1986; 14(1): 50-2.
[18]
Wang DM, Gong ZJ, Chen Y, Sun CY. Adsorption of copper from wastewater by ZnCl2 modified peanut shell. Guang-dong Agricult Sci 2013; 40(19): 175-7.
[19]
Gerçel Ö, Özcan A, Özcan AS, Gerçel HF. Preparation of activated carbon from a renewable bio-plant of Euphorbia rigida by H2SO4 activation and its adsorption behavior in aqueous solutions. Appl Surf Sci 2007; 253(11): 4843-52.
[http://dx.doi.org/10.1016/j.apsusc.2006.10.053]
[20]
Singh R, Singh TS, Odiyo JO, Smith JA, Edokpayi JN. Evaluation of methylene blue sorption onto low-cost biosorbents: Equilibrium, kinetics, and thermodynamics. J Chem 2020; 2020: 8318049.
[http://dx.doi.org/10.1155/2020/8318049]
[21]
Langmuir I. The adsorption of gases on plane surfaces of glass, mica and platinum. J Am Chem Soc 1918; 40(9): 1361-403.
[http://dx.doi.org/10.1021/ja02242a004]
[22]
Freundlich H. Over the adsorption in solution. J Phys Chem 1906; 57: 385-470.
[23]
Veerakumar P, Jeyapragasam T. Surabhi, Salamalai K, Maiyalagan T, Lin K-C. Fuctionalized mesoporous carbon na-nostructures for efficient removal of eriochrome from aqueous solutions. J Chem Eng Data 2019; 64(4): 1305-21.
[http://dx.doi.org/10.1021/acs.jced.8b00878]
[24]
Lagergren S. About the theory of the so-called adsorption of soluble substances, Kungliga Svenska Vetenskapsakad-mius. Hadndlingar 1898; 24(1): 1-9.
[25]
Veerakumar P, Tharini J, Ramakrishnan M, Panneer Muthuselvam I, Lin KC. Graphene oxide nanosheets as an effi-cient and reusable sorbents for eosin yellow dye removal from aqueous solutions. ChemistrySelect 2017; 2(13): 3598-607.
[http://dx.doi.org/10.1002/slct.201700281]
[26]
Ho YS, McKay G. Pseudo-second order model for sorption processes. Process Biochem 1999; 34(5): 451-65.
[http://dx.doi.org/10.1016/S0032-9592(98)00112-5]
[27]
Kononova ON, Kholmogorov AG, Danilenko NV, Kachin SV, Kononov YS, Dmitrieva ZV. Sorption of gold and silver on carbon adsorbents from thiocyanate solutions. Carbon 2005; 43(1): 17-22.
[http://dx.doi.org/10.1016/j.carbon.2004.08.021]
[28]
Wang L, Li QB, Fu MX, Liu YY, Sun DH, Deng X. Study on the physical-chemical properties of biosorption of silver by laminaria japonica. Ion Exch Adsorp 2004; 20(1): 32-9.
[29]
Rasulov BA, Yili A, Aisa HA. Removal of silver from aqueous solution by azotobacter chroococcum XU1 biomass and exopolysaccharide. Adv Microbiol 2015; 5(3): 198-203.
[http://dx.doi.org/10.4236/aim.2015.53019]
[30]
He Q, Zhang Q, Chen W, Li FL. Experimental analysis and theoretical study on the adsorption of silver ions by polythiourea resin. J Nankai Univ 2020; 53(6): 97-104.
[31]
Hasany SM, Saeed MM, Ahmed M. Sorption of traces of silver ions onto polyurethane foam from acidic solution. Talanta 2001; 54(1): 89-98.
[http://dx.doi.org/10.1016/S0039-9140(00)00634-2] [PMID: 18968229]
[32]
Wang C. Study on adsorption properties of functionalized mesoporous materials for 2, 4, 6 - trinitrophenol and Ag+ ions. Liaoning Chem Ind 2016; 45(6): 702-4.
[33]
Simmons P, Singleton I. A method to increase silver biosorption by an industrial strain of Saccharomyces cerevisiae. Appl Microbiol Biotechnol 1996; 45(1-2): 278-85.
[http://dx.doi.org/10.1007/s002530050684] [PMID: 8920202]

Rights & Permissions Print Cite
© 2024 Bentham Science Publishers | Privacy Policy