Removal of Heavy Metals by Waste Tea Leaves from Aqueous Solution
Abstract
In this paper, tea leaves were shown to be an effective, low‐cost biosorbent. Removal of lead, iron, zinc and nickel from 20 mg/L metal solution by dried biomass of waste tea leaves amounted to 96, 91, 72 and 58 %, respectively, at equilibrium, which followed Langmuir and Freundlich adsorption isotherms. Adsorption of metal was in the order of Pb > Fe > Zn > Ni from 5–100 mg/L of metal solution. From a multi‐metallic mixture, 92.5, 84 and 73.2 % of lead, iron and zinc, respectively, were removed. Fourier transform infrared (FTIR) studies indicated that the carboxyl group was involved in the binding of lead and iron, whereas the amine group was involved in the binding of nickel and zinc. A flow through sorption column packed with dried biomass demonstrated a sorption capacity of 73 mg Pb/g of biomass, indicating its potential in cleaning metal containing wastewater. The metal laden biomass obtained could be disposed off by incineration.
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TW and t-TW comprise numerous functional groups that can adsorb Cr(VI).
“The TW and t-TW comprise numerous functional groups that can adsorb Cr(VI)13,25,28–30.”
From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [28]
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References 23 · Cited by 374
- Authors
- Ahluwalia, S. S., & Goyal, D.
- Affiliations
- Thapar Institute of Engineering & Technology (IN)
- Corresponding author
- Goyal, D.
- ORCID
- Goyal, D.
- Venue
- Engineering in Life Sciences
- Publisher
- Wiley
- Published
- 2005-04
- Volume
- 5
- Issue
- 2
- Pages
- 158-162
- ISSN
- 1618-0240 (ISSN-L)
- 1618-2863
- OpenAlex
- W2114051417
- Cited by
- 374
- References
- 23
- Citations by year
- 2026: 8 · 2025: 5 · 2024: 15 · 2023: 32 · 2022: 32 · 2021: 19 · 2020: 27 · 2019: 21 · 2018: 24 · 2017: 21 · 2016: 15 · 2015: 21 · 2014: 19 · 2013: 20 · 2012: 22
- FWCI
- 10.86
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Engineering in Life Sciences (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Environmental Science › Water Science and Technology › Heavy Metal Pollution Remediation
- Keywords
- heavy metal removal, biosorption, low-cost biosorbent, lead, iron, zinc, nickel, adsorption isotherms, Langmuir isotherm, Freundlich isotherm, metal mixtures, carboxyl groups, amino groups, wastewater treatment, biomass incineration
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