scholarly journals Removal of Dyes Using Various Organic Peel-based Materials: A Systematic Review

2021 ◽  
Vol 11 (3) ◽  
pp. 3714-3727

This review recapitulates the recent adsorption study literature regarding the activated biochar and nanocomposites of agricultural peel-based bio-adsorbents for the removal of dyes from wastewater. The use of agricultural peel in decoloration technology is promising for efficiency, cost-effectiveness, and eco-friendliness. Various types of bio-adsorbents have been studied in the literature, such as orange peel, potato peel, banana peel, cucumber peel, Pomelo peel, and rambutan peel, respectively. The equilibrium data and kinetics were analyzed, and they fit known models are also summarized. This review article will help to know the applicability and potential of various peel-based bio-adsorbents in wastewater treatment. The conclusion has been drawn from the literature review, and few suggestions for further future studies are also proposed.

2020 ◽  
Vol 15 (3) ◽  
pp. 384-397
Author(s):  
Ajinkya Ravindra Telgote ◽  
Satish Sudhakarao Patil

Water pollution is increasing due to the different factors such as population growth, large-scale urbanization, deforestation, and unethical activities in the river or other sources of water. Various experts have been working in the field of the preparation ofactivated carbon from renewable energy including cost-effective technologies and products in an eco-friendly manner for various applications. This review article discusses methodologies utilized by various experts for the preparation of activated carbon for the abatement of water pollution. Biomasssuch ascoconut shell, Moringaoleifera seed, Peanut shell, Pomegranate peel, Rice husk, Lemon shell, Banana peel, and Orange Peel are found extremely helpful in the field of treatment of the contaminated water. The reviewed literature showed that the Biomass can be isolatespollutants from contaminated water through physical, mechanical, and biological techniques and removes various physicochemical pollutants such as pH, color, DO, turbidity, conductivity, turbidity, chloride, fluoride, TSS, TDS, BOD, COD, nitrate, phosphate, and heavy metal, etc. from contaminated water.


Author(s):  
Ali Ekber Ün

The purpose of this review article is to collaborate on future studies about hippotherapy to horse and riding trainers, health professionals, veterinarians, individuals in need and individuals with disabilities and their relatives and to shed light on academic studies. It has been stated in studies that hippotherapy is beneficial for patients in the world. Therefore, as a result of new private hippotherapy centers in public institutions and in Turkey, studies on hippotherapy have been started. The studies carried out in hippotherapy are increasing and widespread and continuing to contribute to the treatment of the individuals in need and individuals with disabilities with hippotherapy sessions with expert teams. However, in the studies, the sessions of the hippotherapy team with two common creatures have great duties on the equestrian coaches in order to meet the needs of the horse and the individual in need or individual with disability. For this reason, since hippotherapy is a multidisciplinary team work consisting of specialist professionals, it has been researched to contribute to the horse and rider coaches on the field and to the expert team attending the sessions, to the new experts and the families of the individuals in need and disabled individuals. In the current review, the information about the history of hippotherapy and development, information about hippotherapy institutions in Turkey, individuals in need and individuals with disabilities, benefits of hippotherapy, characteristics of the hippotherapy horse, training of the hippotherapy horse are emphasized, and especially emphasis is placed on the use of work in the field of horse and equestrian coaching.


2021 ◽  
Vol 5 ◽  
Author(s):  
Ahmed AlNouss ◽  
Prakash Parthasarathy ◽  
Hamish R. Mackey ◽  
Tareq Al-Ansari ◽  
Gordon McKay

Large quantities of fruit wastes are generated during the consumption and processing of fruits. The disposal of fruit wastes in an environmentally benign way is a challenging task. The biochar production from fruit wastes by pyrolysis is receiving huge attention because it can alleviate pollution of fruit wastes and provide a supply of biochar sustainably. In this study, five fruit waste types—orange peel, banana peel, mango endocarp, apricot kernel shell, and date pits—are examined. An Aspen Plus simulation tool was employed to develop a steady-state model to predict the pyrolysis product yields of the fruit wastes. The details of the proximate and elemental analyses of the fruit wastes were applied as input parameters in the model, and the simulation was carried out at 300–600°C and 1 atm pressure. Among the fruit wastes, the date pits presented the highest char yield (50.92 wt.%), while the mango endocarp offered the highest syngas yield (54.23 wt.%). From the simulation results, it can be inferred that the date pits are best suited for biochar production, whereas the mango endocarp and orange peel are appropriate for syngas generation. The study is further analyzed by studying the optimization of biomass feedstock blend to yield the highest char relative to bio-oil and syngas. The optimization results demonstrate apricot kernel shell and date pits to dominate the feedstock blend. It is hoped that the current outcomes will be helpful in the selection of appropriate feedstocks for biochar generation through pyrolysis.


Author(s):  
A. Santhosh ◽  
S. S. Dawn

Abstract Food waste has been a complex component added to the Municipal solid waste, making it a major reason for the evolution of greenhouse gases, foul odour and a dwelling habitat for insects and microbes. Diversion of the mixed food waste (unsegregated) to useful materials (activated carbon) would have immense industrial significance. In this study, rice, vegetables, oil and spice (WCVR); mixed fruit peels including banana peel, pomegranate peel, orange peel and lemon peel (MFPW); plain rice (WCR) and mixed food waste (rice, dhal, vegetables, fruits, meat and bones) (MFW) were used. Food waste samples were heated at a temperature of 350 °C for 3 h in an incinerator and then activated with zinc chloride for 2 h in a muffle furnace maintained at 500–600 °C temperature. Zinc chloride activated carbon was characterized through XRD, FESEM and FTIR. WCR carbon resulted to be best-activated carbon, yielding nanomaterials with 2θ = 25.81, 31.76, 34.41 and 56.54, which was in accordance with JCPDS card number. The mixed food waste activated carbon reduced the biodiesel wash water pH from 10 to 6.5 making it suitable for recycle. Turbidity by 98.41%, COD by 41.33%, oil and grease by 99.05% for mixed food waste carbon.


RSC Advances ◽  
2017 ◽  
Vol 7 (87) ◽  
pp. 54969-54979 ◽  
Author(s):  
Dezhi Chen ◽  
Shasha Xie ◽  
Caiqin Chen ◽  
Hongying Quan ◽  
Li Hua ◽  
...  

In recent years, the application of biochar to remove contaminants from aqueous solutions has become interesting due to favorable physical/chemical properties and abundant feedstocks.


2021 ◽  
Vol 47 (3) ◽  
pp. 44-50
Author(s):  
Gábor István Bíró ◽  

This response addresses some points raised by Eduardo Beira’s review article found in this issue of TAD and suggests new directions for future studies focusing on the economic thought of Michael Polanyi.


Author(s):  
Susan Marlow ◽  
Angela Martinez Dy

This article develops a critique of contemporary approaches to analysing the impact of gender upon entrepreneurial propensity and activity. Since the 1990s, increasing attention has been afforded to the influence of gender on women’s entrepreneurial behaviour; such analyses have highlighted an embedded masculinity within the entrepreneurial discourse which privileges men as normative entrepreneurial actors. While invaluable in revealing a prevailing masculine bias within entrepreneurship, this critique is bounded by positioning women as a proxy for the gendered subject. This is a potentially limiting analysis that does not fully recognise gender as a human property with myriad articulations enacted throughout entrepreneurial activity. To progress debate, we engage more deeply with the notion of gender as a multiplicity, exploring the implications of such for future studies of entrepreneurial activity.


2015 ◽  
Vol 72 (4) ◽  
Author(s):  
Mohd Ismid Mohd Said ◽  
Shaikhah Sabri ◽  
Shamila Azman

Contamination of metals in aquatic environment is a worldwide problem because of its toxicity and capability to accumulate in biological chain, as well as persistence in the natural environment. Therefore various expensive technologies have been applied to treat metal-polluted water. In Malaysia there are abundance of banana species available which could provide cheap, low cost and environmental friendly bio-materials. Preliminary study was conducted on two species of banana i.e. Musa balbisiana (Nipah) and Musa acuminata (Kapas). The banana peels were washed, dried and grounded into various range of particle sizes (0.20–1.18 mm). The ability of the adsorbents were determined by agitation of 1.0 g banana peel and 100 ml of cadmium standard solution at the concentration of 100 mg/L. Musa balbisiana showed the highest removal of cadmium at 89.58% from the initial concentration compared to Musa acuminate with the particle size of 0.30-0.60 mm. Adsorption equilibrium data are well described by Langmuir isotherm model. The result also shows that different species have different capabilities to adsorb metal. Hence, their potential as bio-adsorbent could be further be examined for metal removal from wastewater.


2008 ◽  
Vol 1 (2) ◽  
pp. 139-146 ◽  
Author(s):  
M. dos Santos Oliveira ◽  
E. Badiale Furlong

The antifungal and antimycotoxigenic activities of extracts from edible plants were tested by the agar dilution method using the growth diameter of Aspergillus flavus as response and the determination of aflatoxins B1 and B2 in the culture medium. On the 7th incubation day, the greatest fungal inhibitions were reached by the extracts from potato peel; rice and wheat; lemon peel and pulp; eggplant peel; orange peel and pulp; and apple pulp. After the 14-day incubation, the extracts from banana (30 µg phenol/ml agar), eggplant (30 µg phenol/ml agar), and potato (50 and 67 µg phenol/ml agar) pulp reduced the production of aflatoxin B1 by 3.2%/µg phenol/ml agar, 2.9%/µg phenol/ml agar, 1.8%/µg phenol/ml agar and 0.85%/µg phenol/ml agar, respectively, in relation to the control. The extracts from the other vegetables fully inhibited the synthesis of the mycotoxin. These results point to the studied plants and their residues as potential sources of phenolic compounds that may have an inhibitory effect on fungal development and the production of mycotoxins in food.


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