Spent tea leaves: A new non-conventional and low-cost biosorbent for ethylene removal

2015 ◽  
Vol 104 ◽  
pp. 67-73 ◽  
Author(s):  
Jing-Hua Tzeng ◽  
Chih-Huang Weng ◽  
Jenn-Wen Huang ◽  
Yu-Hao Lin ◽  
Chung-Wei Lai ◽  
...  
Keyword(s):  
Low Cost ◽  
Tea Leaves ◽  
Ethylene Removal ◽  
Spent Tea Leaves

scholarly journals Adsorption of chromium (Cr) from tannery wastewater using low-cost spent tea leaves adsorbent

2018 ◽  
Vol 8 (5) ◽  
Author(s):  
Md. Nur-E-Alam ◽  
Md. Abu Sayid Mia ◽  
Farid Ahmad ◽  
Md. Mafizur Rahman
Keyword(s):  
Low Cost ◽  
Tannery Wastewater ◽  
Tea Leaves ◽  
Spent Tea Leaves

Tea Waste: A New Adsorbent for the Removal of Reactive Dyes from Textile Wastewater

2013 ◽  
Vol 803 ◽  
pp. 26-29 ◽  
Author(s):  
Antonio Zuorro ◽  
Maria Laura Santarelli ◽  
Roberto Lavecchia
Keyword(s):  
Low Cost ◽  
Dye Adsorption ◽  
Reactive Dyes ◽  
Textile Wastewater ◽  
Tea Leaves ◽  
Thermally Activated ◽  
Reactive Blue 19 ◽  
Reactive Green 19 ◽  
Spent Tea Leaves

Spent tea leaves (STL), a valueless waste produced during the manufacturing of tea beverages, were investigated as a potential low-cost adsorbent for the removal of the azo dyes Reactive Blue 19 (RB19), Reactive Red 120 (RR 120), Reactive Violet 5 (RV5) and Reactive Green 19 (R19) from wastewater. Untreated STL showed very low removal efficiency (< 7%), while a significant increase in dye adsorption was observed when they were thermally activated. Heating STL to 300 °C for 1 hour resulted in removal efficiencies ranging from 68.5 to 98.4%. Characterization of the waste by FTIR and TG/DTA indicated that major structural and/or chemical changes of the cellulose and hemicellulose components of STL occurred during heating.

THE REMOVAL OF METHYLENE BLUE AND REMAZOL BRILLIANT BLUE R DYES BY USING ORANGE PEEL AND SPENT TEA LEAVES

2015 ◽  
Vol 74 (11) ◽  
Author(s):  
Zainab Mat Lazim ◽  
Elina Mazuin ◽  
Tony Hadibarata ◽  
Zulkifli Yusop
Keyword(s):  
Methylene Blue ◽  
Removal Rate ◽  
Low Cost ◽  
Orange Peel ◽  
Brilliant Blue ◽  
Batch Adsorption ◽  
Tea Leaves ◽  
Remazol Brilliant Blue R ◽  
Spent Tea Leaves ◽  
Dyes Removal

This study explored the low-cost adsorbent of orange peel and spent tea leave for Methylene Blue (MB) and Remazol Brilliant Blue R (RBBR) dyes removal from aqueous solutions. The removal rate and adsorption capacity on the adsorption of dyes were investigated using the batch adsorption study. The present study indicates that the MB was easier to remove by both orange peel and spent tea leave compared to RBBR with percentage removal of 95.72 % and 99.02 % respectively. The effects of morphology, functional groups, and surface area of adsorbents were investigated by using FESEM, FTIR, and BET. The result proved that orange peel and spent tea leave were promising material as an alternative adsorbent for the removal of MB from aqueous solution. 

scholarly journals Effect of temperature and duration of pyrolysis on spent tea leaves biochar: physiochemical properties and Cd(II) adsorption capacity

2020 ◽  
Vol 81 (12) ◽  
pp. 2533-2544
Author(s):  
Zhanbiao Yang ◽  
Xincong Liu ◽  
Mengdi Zhang ◽  
Lixia Liu ◽  
Xiaoxun Xu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Pyrolysis Temperature ◽  
Low Cost ◽  
Total Yield ◽  
Effect Of Temperature ◽  
Surface Porosity ◽  
Tea Leaves ◽  
Physiochemical Properties ◽  
Pseudo Second Order ◽  
Spent Tea Leaves

Abstract We analyzed the effects of pyrolysis temperature and duration on the physiochemical properties and Cd(II) adsorption capacity of spent tea leaves (STL) biochar. The STL biochar was produced by pyrolysis at 300, 400, 500 and 600 °C for 1 and 2 h. The pyrolysis temperature was positively correlated to the ash content, pH, electrical conductivity, specific surface area (SBET), pore volume (PV) and C content, and negatively with the total yield, O, H and N content, and the O/C and H/C atomic ratios. Furthermore, the surface porosity of STL biochar increased, the density of oxygen-containing functional groups decreased, and the formation of aromatic structures was enhanced at higher pyrolysis temperatures. The adsorption of Cd(II) onto STL biochar fitted with the pseudo-second-order kinetics and Langmuir isotherms model. The STL biochar produced at 600 °C for 2 h showed the maximum Cd(II) adsorption capacity of 97.415 mg/g. In addition, Cd(II) adsorption was mainly physical and occurred in monolayers. Thus, STL biochar is a suitable low-cost adsorbent for wastewater treatment.

Aspirin Adsorption onto Activated Carbon Derived from Spent Tea Leaves: Statistical Optimization and Regeneration Study

2021 ◽  
Author(s):  
Syie Luing Wong ◽  
Mohamed Hizam Mohamed Noor ◽  
Norzita Ngadi ◽  
Ibrahim Mohammed Inuwa ◽  
Ramli Mat ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Statistical Optimization ◽  
Tea Leaves ◽  
Regeneration Study ◽  
Spent Tea Leaves

Corrigendum to “Activated carbons from co-carbonization of waste truck tires and spent tea leaves” [Sustain. Chem. Pharm. (21) 2021 (100410)]

2021 ◽  
Vol 21 ◽  
pp. 100429
Author(s):  
Cansu Guclu ◽  
Koray Alper ◽  
Murat Erdem ◽  
Kubilay Tekin ◽  
Selhan Karagoz
Keyword(s):  
Activated Carbons ◽  
Tea Leaves ◽  
Truck Tires ◽  
Spent Tea Leaves

Removal of chlortetracycline from water using spent tea leaves-based biochar as adsorption-enhanced persulfate activator

Chemosphere ◽  
2021 ◽  
pp. 131770
Author(s):  
Yi-Ping Chen ◽  
Chao-Hong Zheng ◽  
Yao-Yi Huang ◽  
Yi-Ren Chen
Keyword(s):  
Tea Leaves ◽  
As Adsorption ◽  
Spent Tea Leaves

scholarly journals On the Desalination of Saline Waters via Batch Adsorption with Spent Tea Leaves

2017 ◽  
Vol 08 (03) ◽  
Author(s):  
Kim G ◽  
García H ◽  
Japhe T ◽  
Iyengar R ◽  
Llanos BP ◽  
...  
Keyword(s):  
Batch Adsorption ◽  
Tea Leaves ◽  
Saline Waters ◽  
Spent Tea Leaves

scholarly journals Preparation and Characterization of Chemically-Modified Biomaterials and Their Application as Adsorbents of Penicillin G

2018 ◽  
Vol 1 (1) ◽  
pp. 114-124 ◽  
Author(s):  
Jesie Silva ◽  
Lizebel Morante ◽  
Tesfamichael Demeke ◽  
Jacqueline Baah-Twum ◽  
Abel Navarro
Keyword(s):  
Chemical Modification ◽  
Functional Groups ◽  
Negative Impact ◽  
Ph Dependence ◽  
Sem Analysis ◽  
Penicillin G ◽  
Tea Leaves ◽  
Reaction Conditions ◽  
Spent Tea Leaves

The prevalence of antibiotics in water creates microbial resistance and has a negative impact on the ecosystem. Biomaterials such as spent tea leaves are rich in functional groups and are suitable for chemical modification for diverse applications. This research proposes the use of spent tea leaves of chamomile (CM), green tea (GT), and peppermint (PM) as structural scaffolds for the incorporation of carboxyl, sulfonyl, and thiol groups to improve the adsorption of Penicillin G (Pe). Adsorbents characterization reported a higher number of acidic functional groups, mainly in thiolated products. Scanning electron microscopy (SEM) analysis showed changes on the surfaces of the adsorbents due to reaction conditions, with a stronger effect on thiolated and sulfonated adsorbents. Elemental analysis by Energy dispersive X-ray spectrophotometry (EDS) corroborated the chemical modification by the presence of sulfur atoms and the increase in oxygen/carbon ratios. Batch experiments at different pH shows a strong pH-dependence with a high adsorption at pH 8 for all the adsorbents. The adsorption follows the trend CMs > GTs > PMs. Thiolation and sulfonation reported higher adsorptions, which is most likely due to the sulfur bridge formation, reaching adsorption percentages of 25%. These results create a new mindset in the use of spent tea leaves and their chemical modifications for the bioremediation of antibiotics.

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