Dilute acid and alkaline pretreatment of spent tea leaves to determine the potential of carbon sources

2018 ◽  
Vol 8 (3) ◽  
pp. 529-544 ◽  
Author(s):  
Mustafa Germec ◽  
Nour Ben Bader ◽  
Irfan Turhan
Keyword(s):  
Carbon Sources ◽  
Alkaline Pretreatment ◽  
Dilute Acid ◽  
Tea Leaves ◽  
Spent Tea Leaves

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 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

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.

Advances in bioconversion of spent tea leaves to value-added products

2021 ◽  
pp. 126409
Author(s):  
Taru Negi ◽  
Yogesh Kumar ◽  
Ranjna Sirohi ◽  
Shikhangi Singh ◽  
Ayon Tarafdar ◽  
...  
Keyword(s):  
Value Added ◽  
Tea Leaves ◽  
Spent Tea Leaves ◽  
Value Added Products

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.

Physical and Sound Absorption Properties of Spent Tea Leaf Fiber Filled Polyurethane Foam Composite

2014 ◽  
Vol 660 ◽  
pp. 541-546 ◽  
Author(s):  
Qumrul Ahsan ◽  
Chia Pooi Ching ◽  
Mohd Yuhazri bin Yaakob
Keyword(s):  
Absorption Coefficient ◽  
Polyurethane Foam ◽  
High Resistance ◽  
Sound Absorption ◽  
Filler Loading ◽  
Tea Plant ◽  
Sound Absorption Coefficient ◽  
Tea Leaves ◽  
Absorption Properties ◽  
Spent Tea Leaves

Spent tea leaves (STL) from tea producing factories can be considered as new resources for sound absorbing polyurethane (PU) matrix composite materials because STL are rich in polyphenols (tannins) which cause high durability, high resistance to fungal and termites, and high resistance to fire. The research aims to study the physical characteristics of STL and the effect of dispersion morphology of STL on the sound absorption properties of polyurethane foam composites by varying filler loading. Three grades of STL fibers either as received or granulated are used in this study, namely BM-FAE and SWBHE derived from the stalk while FIBER-FAE derived from the leaves of the tea plant. The PU/STL composites are fabricated through open molding method with a fiber loading of 16 wt. %. The fabricated composites are then subjected to physical and sound absorption testing as well as microscopic observations to analyze the distribution of filler in composite. The study shows that as-received FIBER-FAE spent tea leaves provide the best sound absorption coefficient and for composites using granulated fibers from any grade have lower sound absorption coefficient. These results show that a novel kind of sound absorption materials with the recycling of waste materials can be obtained for the solution of noise and environmental pollution.

scholarly journals Glucose recovery from different corn stover fractions using dilute acid and alkaline pretreatment techniques

2017 ◽  
Vol 41 (1) ◽  
Author(s):  
D. Aboagye ◽  
N. Banadda ◽  
R. Kambugu ◽  
J. Seay ◽  
N. Kiggundu ◽  
...  
Keyword(s):  
Corn Stover ◽  
Alkaline Pretreatment ◽  
Dilute Acid ◽  
Glucose Recovery
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