scholarly journals Study of Mangosteen Peel (Garcinia mangostana L.) Waste Capability to Recover Au(III) and Ag(I) in Aqueous Solution

2020 ◽  
Vol 21 (1) ◽  
pp. 251
Author(s):  
Mellia Harumi ◽  
Rian Kurniawan ◽  
Agustiwandina Saputri ◽  
Dian Hanna Saraswati ◽  
Meissha Ayu Ardini ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electronic Waste ◽  
Precious Metals ◽  
Soxhlet Extraction ◽  
Isotherm Model ◽  
Garcinia Mangostana ◽  
Maximum Capacity ◽  
Mangosteen Peel ◽  
Ph Conditions

Electronic waste (e-waste) has been confirmed containing some precious metals such as gold and silver. Mangosteen peel waste as eco-friendly adsorbent has been studied to recover Au(III) and Ag(I) successfully. Recovery was started through adsorbent preparation, consisting of soxhlet extraction and maceration. About 100 mg of adsorbent was dispersed into Au(III) and Ag(I) solutions in various pH conditions (2–6). The result proves that the optimum adsorptions of Au(III) and Ag(I) are at pH 2 and pH 6, respectively. Au(III) adsorption follows the isotherm model of Langmuir with a maximum capacity of 0.580 mmol/g (114.27 mg/g). Ag(I) adsorption follows the isotherm model of Freundlich with a maximum capacity of 0.511 mmol/g (55.10 mg/g).

scholarly journals Towards a Smart E-Waste System Utilizing Supply Chain Participants and Interactive Online Maps

Recycling ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 8
Author(s):  
Tetiana Shevchenko ◽  
Michael Saidani ◽  
Yuriy Danko ◽  
Ievgeniia Golysheva ◽  
Jana Chovancová ◽  
...  
Keyword(s):  
Waste Management ◽  
Business Model ◽  
Electronic Waste ◽  
Precious Metals ◽  
Local Delivery ◽  
Waste Collection ◽  
Business Model Canvas ◽  
Online Maps ◽  
Delivery Services ◽  
Reduction Of Co2

Efficient electronic waste (e-waste) management is one of the vital strategies to save materials, including critical minerals and precious metals with limited global reserves. The e-waste collection issue has gained increasing attention in recent years, especially in developing countries, due to low collection rates. This study aims to search for progressive solutions in the e-waste collection sphere with close-to-zero transport and infrastructure costs and the minimization of consumers’ efforts towards an enhanced e-waste management efficiency and collection rate. Along these lines, the present paper develops a smart reverse system of e-waste from end-of-life electronics holders to local recycling infrastructures based on intelligent information technology (IT) tools involving local delivery services to collect e-waste and connecting with interactive online maps of users’ requests. This system considers the vehicles of local delivery services as potential mobile collection points that collect and deliver e-waste to a local recycling enterprise with a minimum deviation from the planned routes. Besides e-waste transport and infrastructure costs minimization, the proposed smart e-waste reverse system supports the reduction of CO2 through the optimal deployment of e-waste collection vehicles. The present study also advances a solid rationale for involving local e-waste operators as key stakeholders of the smart e-waste reverse system. Deploying the business model canvas (BMC) toolkit, a business model of the developed system has been built for the case of Sumy city, Ukraine, and discussed in light of recent studies.

scholarly journals Kadar Polifenol Total Ekstrak Etanol Kulit Buah Manggis (Garcinia mangostana) Pada Variasi Asal Daerah

2017 ◽  
Vol 3 (1) ◽  
pp. 22 ◽  
Author(s):  
Any Guntarti
Keyword(s):  
Ethanol Extract ◽  
Total Phenol Content ◽  
Ammonia Vapor ◽  
Phenol Content ◽  
Garcinia Mangostana ◽  
Mangosteen Peel ◽  
Fruit Skin ◽  
Specific Parameter ◽  
Qualitative Test ◽  
Parameter Test

Background:Mangosteen peel is one of the waste of mangosteen, that nowadays have already utilized much to manage health problems. One of the ingredients in the mangosteen fruit skin is a polyphenols. Objective: to determine the polyphenols content of the ethanol extract of mangosteen peel variations based on different regions. Methods: Powder of dried mangosteen peel that come from 3 difference areas, Sumatera (Pekanbaru), Jawa (Yogyakarta) and Kalimantan (Martapura) extracted with ethanol 70% by multilevel maceration. Extract that obtained than tested specific parameter form of qualitative test of polyphenols compounds with FeCl3, AlCl3, ammonia vapor, Folin Ciucalteau and tannin test. Determination level of polyphenols (Gallic acid) with visible spectrophotometri after reacted with Folin Ciucalteau reagent. Results: The result of this research was quality test of extract etanol 70% Specific parameter test total phenol content (mg GAE/g ekstrak) from Sumatera, Jawa and Kalimantan are :824.13 (mg GAE/g ekstrak); 155,86 (mg GAE/g ekstrak); 688,9 (mg GAE/g ekstrak). Conclusions: There were difference in contents of polyphenol of mangosteen peel origin among Sumatera, Jawa and Kalimantan. 

scholarly journals FORMULASI NANOEMULGEL EKSTRAK KULIT MANGGIS (Garcinia Mangostana L.)

2019 ◽  
Vol 1 (3) ◽  
pp. 166-176
Author(s):  
Hilda Damayanti ◽  
Saleh Wikarsa ◽  
Garnadi Jafar
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Garcinia Mangostana ◽  
Mangosteen Peel ◽  
Dpph Method ◽  
Nanoemulsion Gel ◽  
Materials Used ◽  
Peel Extract

Antioxidant-containing cosmetic has antiaging therapy that can inhibit the free radical formation. Mangosteen peel extract has very strong antioxidant activity. To enhance the effect and comfortness of mangosteen peel extract use on the skin, it could be made into nanoemulgel. The article provides the information about method of preparation and evaluation of nanoemulsion-gel. The purpose of this study was to formulate a stable microemulgel of mangosteen peel extractusing halal materials declared halal according to Islamic Shari’a.  the materials used don’t contain carrion, blood, pig and/ animals that don’t conform to Islamic Shari’a. Microemulgel mangosteen peel extract was made by varying plantacare® 1200 UP concentration as cosurfactant (5, 10, 15, 20 and 25%) in the microemulsion and it was incorporated into the gel base. Evaluations were included the antioxidant activity test and organoleptic, pH, viscosity, stability, particle size analysis and panelist test. The antioxidant activity determined by DPPH method showed that IC50 value of mangosteen peel extract was 5.54 ppm. The third microemulsion formula containing cosurfactant of 15% resulted in the best results in that the parameter of the product can be penetrated by ray laser was at particle size of  23.65 nm, was determined by tranmission Electron Microscopy (TEM). Microemulgel containing Viscolam® MAC 10 of seven percent gave the stable formula proofed by freeze thaw and sentrifuga test. The five microemulgel formulations were stable.    

scholarly journals Methanol extract of mangosteen peel (Garcinia mangostana L.) increase activity acetylcholinesterase and glutathione peroxidase and reduce MDA in diazinon exposed rat

2018 ◽  
Vol 7 (3) ◽  
Author(s):  
I Gusti Ayu Kunti Sri Panca Dewi ◽  
Ida Bagus Putra Manuaba ◽  
I Wayan Putu Sutirta Yasa ◽  
Bagus Komang Satriyasa
Keyword(s):  
Glutathione Peroxidase ◽  
Methanol Extract ◽  
Garcinia Mangostana ◽  
Mangosteen Peel

Marine Fungi as Potential Eco-Sustainable Resource for Precious Metals Recovery from Electronic Waste

2021 ◽  
Author(s):  
Christian Galasso ◽  
Xabier Lekube ◽  
Ibon Cancio ◽  
Antonio Dell’Anno ◽  
Christophe Brunet ◽  
...  
Keyword(s):  
Marine Fungi ◽  
Electronic Waste ◽  
Precious Metals ◽  
Metals Recovery ◽  
Precious Metals Recovery

Status of Electronic Waste Management in India

2019 ◽  
pp. 238-250
Author(s):  
Sanjay Kumar Koli ◽  
Athar Hussain
Keyword(s):  
Developing Countries ◽  
Waste Management ◽  
Human Health ◽  
Electronic Waste ◽  
Precious Metals ◽  
Health Resources ◽  
Hazardous Materials ◽  
Informal Recycling ◽  
Toxic Materials ◽  
Global Issue

Electronics waste is becoming a major global issue. Huge accumulation of e-waste and its recycling through primitive means for extraction of precious metals are a real concern in the developing countries due to the presence of hazardous materials in e-waste. The major portion of e-waste generated domestically as well as illegally imported is recycled in a crude manner leading to pollution of the environment. Current practices of e-waste management in India encounters many challenges like the difficulty in inventorization, ineffective regulations, pathetic and unsafe conditions of informal recycling, poor awareness of consumers, and reluctance on part of stakeholders to address the issues. As a result, toxic materials enter waste stream with no special precautions to avoid the known adverse impacts on the environment and human health. Resources are wasted when economically valuable materials are dumped. This chapter highlights the hazards caused due to improper handling of e-wastes and also describes some appropriate measures to be adopted for its management and safe disposal.

Adsorption of Pb(II) from Solution by Mangosteen Peel Charcoal Powder

2017 ◽  
Vol 866 ◽  
pp. 116-118 ◽  
Author(s):  
Sangwoei Sawekwiharee ◽  
Suejit Pechprasarn ◽  
Anchana Kuttiyawong ◽  
Naphat Albutt
Keyword(s):  
Wastewater Treatment ◽  
Color Change ◽  
Cost Effective ◽  
Powder Form ◽  
Garcinia Mangostana ◽  
Mangosteen Peel

This research investigates the use of charcoal produced from waste peels of the mangosteen (Garcinia mangostana L.) fruit as adsorbents of lead contaminants for cost effective wastewater treatment. Test solutions of lead (Pb (NO3)2) were prepared over 0.003 M to 0.5 M, to observe a color change KI was added to the solution. Charcoal from mangosteen peel was added in powder form or as flakes. We found that at least 1.5 g of charcoal was required to adsorb lead from 20 ml of a 0.015 M (Pb (NO3)2) solution, as indicated by low sediment and reduced color change.

Sign in / Sign up

Export Citation Format

Share Document