Green low cost nanomaterial produced from Moringa oleifera seed waste for enhanced removal of chlorpyrifos from wastewater: Mechanism and sorption studies

Author(s):  
Hala M. Hamadeen ◽  
Elsayed A. Elkhatib ◽  
Mohamed E.I. Badawy ◽  
Samir A.M. Abdelgaleil
2017 ◽  
Author(s):  
Faridah Ghafar ◽  
Aminullah Mohtar ◽  
Norzahir Sapawe ◽  
Norulakmal Nor Hadi ◽  
Marmy Roshaidah Mohd Salleh

2019 ◽  
Vol 61 (1) ◽  
pp. 101-109
Author(s):  
Nguyen Van Hoai Phong ◽  
Phan Thi Kim Thi ◽  
Nguyen Thao Nhu ◽  
Huynh Thi Thanh Truc ◽  

The use of plant-deriveded natural coagulants in water treatment systems is seen as solution to replace chemical coagulants. Among them, the Moringa oleifera has proved to be one of the most effective natural, low - cost, environmentally friendly water coagulants. In this study, Moringa oleifera has used from 0 g (control sample without coagulants) to 2.0 g of Moringa oleifera seed powder in one liter of the Tien river water sample, coagulation time in 1 hour, 3 hours, 6 hours. The results of the study showed that Moringa oleifera seed powder has antibacterial ability when adding 0.4 g per liter of water treated. The water sample has TSS of 93.3 mg/l, COD of 101 mg/l, and the presence of 1530 MPN/100ml Coliform bacteria. After one hour coagulation of treatment, it reduced to TSS, COD, and Coliform were found to be 13.3 mg/l, 18.7 mg/l, and 9 MPN/100ml, respectively. The efficiency of reduction for 76.92% TSS, 81.57% COD, and 99.41% Coliform.


Author(s):  
Semirames Do N. Silva ◽  
Suiane M. Moraes ◽  
Joana D’arc P. Matos ◽  
Roberta de S. O. Wanderley ◽  
Luís P. F. R. Silva ◽  
...  

Aims: The use of natural, on-site, low-cost coagulants can reduce problems related to the consumption of non-potable water and untreated wastewater discharges into receiving bodies. A natural solution for acting as a coagulant is the Moringa oleifera seed. The objective of this study is to analyze the efficiency of turbidity removal through the application of moringa seeds as a natural coagulant in three different retention times. Methodology: The research was carried out at the Agricultural Products Storage Processing Laboratory of the Federal University of Campina Grande. The powder obtained after trituration of the seeds and the seed without bark was used. A jar test was used to test the application of the coagulant based on powder and moringa seeds. To obtain artificial water, 0.5 g of clay was added to the jars of the jar test. The Jar Test was connected to a rotation of 120 rpm for 30 minutes, then was turned off and kept at rest for 45, 53 and 61 minutes. Subsequently, approximately 50 mL of sample was collected from each pitcher for analysis of the turbidity parameter. Results: The application of the seeds was more efficient than the powder. Sedimentation times influenced the removal of turbidity. Conclusion: The turbidity values are outside of what is allowed by current Brazilian legislation.


2016 ◽  
Vol 23 (7) ◽  
pp. 645-649 ◽  
Author(s):  
José H.E.S. Freitas ◽  
Keissy V. de Santana ◽  
Pollyanna M. da Silva ◽  
Maiara C. de Moura ◽  
Luana C.B.B. Coelho ◽  
...  

2017 ◽  
Vol 329 ◽  
pp. 102-109 ◽  
Author(s):  
William K. Garde ◽  
Steven G. Buchberger ◽  
David Wendell ◽  
Margaret J. Kupferle

2012 ◽  
Vol 65 (8) ◽  
pp. 1435-1440 ◽  
Author(s):  
Thiago L. Marques ◽  
Vanessa N. Alves ◽  
Luciana M. Coelho ◽  
Nívia M. M. Coelho

Metal contaminants are generally removed from effluents by chemical and physical processes which are often associated with disadvantages such as the use of toxic reagents, generation of toxic waste and high costs. Hence, new techniques have been developed, among them the study of natural adsorbents, for instance, the use of Moringa oleifera seeds. The potential of M. oleifera seeds for nickel removal in aqueous systems was investigated. The seeds utilized were obtained from plants grown in Uberlândia/Brazil. After being dried and pulverized, the seeds were treated with 0.1 mol/L NaOH. Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analyses were used for the characterization of the material. Using the optimized methodology (50 mL of 4.0 mg/L Ni(II), pH range of 4.0–6.0, agitation time of 5 min and adsorption mass of 2.0 g) more than 90% of Ni(II) could be removed from water samples. The sorption data were fitted satisfactorily by the Langmuir adsorption model. Evaluation applying the Langmuir equation gave the monolayer sorption capacity as 29.6 mg/g. The results indicate that this material could be employed in the extraction of nickel, considering its ease of use, low cost and environmental viability, which make it highly attractive for application in developing countries.


2020 ◽  
Vol 15 (3) ◽  
pp. 15-23
Author(s):  
J.B. Hussein ◽  
J.O.Y. Ilesanmi ◽  
H.M Aliyu ◽  
V. Akogwu

The possible combination of cowpea with moringa seed flour for the production of nutrient dense moimoi (steamed cowpea paste) and akara (deep-fat fried balls) were investigated. Composite blends of cowpea and moringa seed flour in different proportions (98:2, 96:4 and 94:6) were used in moimoi and akara production while 100% cowpea flour served as control. The proximate and sensory analyses of the products were determined using standard methods. The results showed a positive influence in the proximate compositions of these products as the proportion of moringa seed flour substitution increased. The moimoi samples ranged between 10.77 – 26.92%, 18.27 – 21.16%, 8.12 – 10.72%, 1.80 – 2.19%, 0.76 – 0.84%, 44.07 – 53.99% and 269.87 – 335.18 Kcal/100g while akara samples ranged between 9.73 – 10.77%, 19.51 – 22.12%, 7.41 – 9.90%, 2.39 – 2.71%, 0.87 – 0.93%, 54.69 – 59.00% and 320.26 – 332.08 Kcal/100g respectively for moisture contents, protein contents, crude fats, ash, crude fibers, carbohydrates and energy values. The sensory evaluation results of these products favourably competed with the control except samples D (94:6) which showed a slight difference in all parameters tested. Thus, the substitution of cowpea with moringa seed flour up to 2% and 4% proportions are adequate to produce acceptable moimoi and akara, respectively.The possible combination of cowpea with moringa seed flour for the production of nutrient dense moimoi (steamed cowpea paste) and akara (deep-fat fried balls) were investigated. Composite blends of cowpea and moringa seed flour in different proportions (98:2, 96:4 and 94:6) were used in moimoi and akara production while 100% cowpea flour served as control. The proximate and sensory analyses of the products were determined using standard methods. The results showed a positive influence in the proximate compositions of these products as the proportion of moringa seed flour substitution increased. The moimoi samples ranged between 10.77 – 26.92%, 18.27 – 21.16%, 8.12 – 10.72%, 1.80 – 2.19%, 0.76 – 0.84%, 44.07 – 53.99% and 269.87 – 335.18 Kcal/100g while akara samples ranged between 9.73 – 10.77%, 19.51 – 22.12%, 7.41 – 9.90%, 2.39 – 2.71%, 0.87 – 0.93%, 54.69 – 59.00% and 320.26 – 332.08 Kcal/100g respectively for moisture contents, protein contents, crude fats, ash, crude fibers, carbohydrates and energy values. The sensory evaluation results of these products favourably competed with the control except samples D (94:6) which showed a slight difference in all parameters tested. Thus, the substitution of cowpea with moringa seed flour up to 2% and 4% proportions are adequate to produce acceptable moimoi and akara, respectively. Keywords: Moimoi, Akara, Cowpea flour, Moringa oleifera seed flour and Sensory properties: Moimoi, Akara, Cowpea flour, Moringa oleifera seed flour and Sensory properties


2021 ◽  
pp. 1-47
Author(s):  
Alessandra Marjorie de Oliveira ◽  
Márcia Maria dos Anjos Szczerepa ◽  
Maria Cristina Bronharo Tognim ◽  
Benício Alves de Abreu Filho ◽  
Lúcio Cardozo-Filho ◽  
...  

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