Investigation of modified orange peel in the removal of Cd2+, Co2+ and Zn2+ from wastewater

Sara S. Mahrous ◽  
E. A. Abdel Galil ◽  
Muhammad S. Mansy
Fuel ◽  
2021 ◽  
Vol 291 ◽  
pp. 120222
R. Vignesh ◽  
B. Ashok ◽  
A.K. Jeevanantham ◽  
Ashwin Jacob ◽  
Raunak Devdatta Prabhu Bhembre ◽  

2021 ◽  
Vol 42 ◽  
pp. 100402
Jacques Romain Njimou ◽  
John Godwin ◽  
Hugues Pahimi ◽  
S. Andrada Maicaneanu ◽  
Fridolin Kouatchie-Njeutcha ◽  

Mohamed G. Shehata ◽  
Tarek S. Awad ◽  
Dalal H. Asker ◽  
Sobhy A. El sohaimy ◽  
Nourhan M. Abd El- Aziz ◽  

2021 ◽  
Vol 13 (14) ◽  
pp. 7945
Matteo Vitale ◽  
María del Mar Barbero-Barrera ◽  
Santi Maria Cascone

More than 124 million tons of oranges are consumed in the world annually. Transformation of orange fruit generates a huge quantity of waste, largely composed of peels. Some attempts to reuse by-products derived from citrus waste have been proposed for energy production, nutrient source or pharmaceutical, food and cosmetic industries. However, their use in the building sector had not been researched. In this study, orange peels, in five different ratios, from 100% of wet peels to 75% and from 0% of dry peels to 25%, were submitted to a thermo-compression procedure. They were evaluated according to their physical (bulk density, water absorption, thickness swelling, surface soundness and thermal conductivity) and mechanical properties (bending strength and modulus of elasticity). The results showed that orange peels can be used as thermal insulation material. The addition of dried peels makes the structure of the board heterogeneous and thus increases its porosity and causes the loss of strength. Hence, the board with the sole use of wet peel, whose thermal conductivity is 0.065 W/mK while flexural strength is 0.09 MPa, is recommended.

2021 ◽  
Vol 11 (14) ◽  
pp. 6346
Laura Patiño-Saldivar ◽  
José A. Hernández ◽  
Alba Ardila ◽  
Mercedes Salazar-Hernández ◽  
Alfonso Talavera ◽  

Bioremediation is a pollutant removal method that has had a great boom due to the diversity of agroindustrial waste that can be used for this purpose, and that has shown having great efficiency and profitability in the adsorption of heavy metals, such as Pb, Cu, and Co. Based on the above, the present work carried out kinetic and equilibrium studies of bioadsorption of Cr (III) using orange peel (OP) as adsorbent, previously treated with methanol, water, and a water–methanol mixture at different pH (0.91, 1.78 and 2.72), and at 30 °C, finding that the adsorption capacity at equilibrium increases with increasing pH, having a maximum of 55 mg g−1 at pH 2.72—under these conditions, lower adsorption energy was used to remove Cr (III). In addition, it was determined that there are no external mass transfer limitations. An isoelectric point analysis indicated that the adsorption is not carried out by electrostatic forces and a FTIR study of the functional groups of OP showed a decrease in the main functional groups (pectin, cellulose, and lignin, among others), which is directly related to the adsorption capacity of the bioadsorbent.

2021 ◽  
Vol 1055 (1) ◽  
pp. 012043
Somasundaram Periasamy ◽  
Jegadheesan Chinnasamy ◽  
Jeyaprakash Natarajan ◽  
Saravanan Ravirajan ◽  
Dhavaneeswaran Nagharajan

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