scholarly journals Sustainable Exploitation of Coffee Silverskin in Water Remediation

2018 ◽  
Vol 10 (10) ◽  
pp. 3547 ◽  
Author(s):  
Angela Malara ◽  
Emilia Paone ◽  
Patrizia Frontera ◽  
Lucio Bonaccorsi ◽  
Giuseppe Panzera ◽  
...  
Keyword(s):  
Adsorption Equilibrium ◽  
Water Remediation ◽  
Isotherm Models ◽  
Adsorption Efficiency ◽  
Spent Coffee Grounds ◽  
Ion Removal ◽  
Coffee Silverskin ◽  
Coffee Grounds ◽  
Adsorption Data ◽  
Potential Toxic Metals

Coffee silverskin (CS), the main solid waste produced from the coffee industry, has efficiently been used as adsorbent material to remove potential toxic metals (PTMs). In order to assess its suitability in water remediation, kinetic adsorption experiments of Cu2+, Zn2+, and Ni2+ ions from wastewater were carried out and the adsorption performance of the waste material was compared with that of another well-known waste from coffee industry, spent coffee grounds (SCG). By using CS as sorbent material, ion removal follows the order Cu2+ > Zn2+ > Ni2+ with the adsorption equilibrium occurring after about 20 min. The adsorption efficiency of Ni2+ ions is the same for both investigated materials, while Cu2+ and Zn2+ ions are removed to a lesser extent by using CS. Equilibrium-adsorption data were analyzed using two different isotherm models (Langmuir and Freundlich), demonstrating that monolayer-type adsorption occurs on both CS and SCG surfaces. The overall results support the use of coffee silverskin as a new inexpensive adsorbent material for PTMs from wastewater.

scholarly journals Utilization of galactomannan from spent coffee grounds as coagulant aid to treat synthetic Congo red wastewater

2021 ◽  
Author(s):  
Hans Kristianto ◽  
Sekar Astari Saraswati ◽  
Susiana Prasetyo ◽  
Asaf K Sugih
Keyword(s):  
Congo Red ◽  
Synthetic Wastewater ◽  
Isotherm Models ◽  
Spent Coffee Grounds ◽  
Adsorption Study ◽  
Natural Coagulant ◽  
Coffee Grounds ◽  
Bet Isotherm ◽  
Inorganic Chemical ◽  
Promising Source

Abstract Over the last few years, there is a significant growth in research exploring natural based coagulant due to its various benefits to decrease or even substitute the usage of inorganic chemical coagulants. Polysaccharide based coagulant and coagulant aid is a promising source for this purpose, due to its abundance. In this study, we reported utilization of galactomannan extracted from spent coffee grounds as natural coagulant aid in coagulation of Congo red synthetic wastewater. The coagulation was done at fixed dosage of FeCl3 (160 mg/L) and pH of 6. The effect of galactomannan as coagulant aid was observed by varying galactomannan dosage (0-140 mg/L) and Congo red concentration (20–70 mg/L). It was found that galactomannan as coagulant aid could increase the removal of Congo red, around 30–90% removal, depends on Congo red concentration, compared FeCl3 only (0–65%). The coagulation adsorption study was also investigated using Langmuir, Freundlich, and Brunauer – Emmet – Teller (BET) isotherm models. It was found that Congo red coagulation using FeCl3 only was following Langmuir isotherm, indicating monolayer – homogenous formation during the coagulation. On the other hand, with the presence of galactomannan the coagulation was best described by BET isotherm, indicating multilayer – heterogeneous adsorption, possibly due to interparticle bridging of galactomannan during colloid aggregation. The findings in this study suggest synergistic effect of galactomannan and FeCl3 in the coagulation process and proved potential of galactomannan from spent coffee grounds as natural coagulant aid.

scholarly journals Chemical, Functional, and Structural Properties of Spent Coffee Grounds and Coffee Silverskin

2014 ◽  
Vol 7 (12) ◽  
pp. 3493-3503 ◽  
Author(s):  
Lina F. Ballesteros ◽  
José A. Teixeira ◽  
Solange I. Mussatto
Keyword(s):  
Structural Properties ◽  
Spent Coffee Grounds ◽  
Coffee Silverskin ◽  
Coffee Grounds

Thermodynamic and Kinetic Models for Removal of Thorium from Aqueous Solution

2017 ◽  
Vol 6 (1) ◽  
pp. 148-156
Author(s):  
P. Indhumathi ◽  
S. Sathiyaraj ◽  
U. S. Shoba ◽  
P. S. Syed Shabudeen ◽  
C. Jayabalakrishnan
Keyword(s):  
Aqueous Solution ◽  
Kinetic Models ◽  
Metal Ion ◽  
Adsorption Equilibrium ◽  
Cost Effective ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Adsorptive Removal ◽  
Adsorption Data ◽  
Water And Wastewater

Adsorption is a unique process for the removal of pollutants from water and wastewater since the process is cost effective, easily adoptable and environmentally compatible. The micro algae are a promising way to produce a useful adsorbent for Thorium (VI) removal from aqueous solution. The specific surface area of the microalgae was determined and its properties studied by scanning electron microscopy (SEM). Adsorptive removal of Thorium (VI) from aqueous solution on micro algae has been studied under varying conditions of agitation time, metal ion concentration, adsorbent dose and pH to assess the kinetic and equilibrium parameters. Adsorption equilibrium was obtained in 120 min for 20 to 120 mg/L of Thorium (VI) concentrations. The Langmuir, Freundlich, Temkin, Redlich-Peterson isotherm models, kinetic models and thermodynamic models were found to provide an excellent fitting of the adsorption data. The adsorption capacity of thorium 91.73% maximum percent removal in thorium at pH 3. This adsorbent was found to be effective and economically attractive.

scholarly journals Metal ion removal using waste byssus from aquaculture

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Devis Montroni ◽  
Giorgia Giusti ◽  
Andrea Simoni ◽  
Genny Cau ◽  
Claudio Ciavatta ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
High Efficiency ◽  
Water Remediation ◽  
Isotherm Models ◽  
Metal Ion Removal ◽  
Chemical Systems ◽  
Ion Removal ◽  
Adsorption Isotherm Models ◽  
Ideal Solutions

AbstractByssus is a thread-like seafood waste that has a natural high efficiency in anchoring many metal ions thanks to its richness of diverse functional groups. It also has structural stability in extreme chemical, physical and mechanical conditions. The combination of these properties, absent in other waste materials, has novelty suggested its use as matrix for water remediation. Thus, pristine byssus, upon de-metalation, was studied to remove metal ions from ideal solutions at pH 4 and 7, as model chemical systems of industrial and environmental polluted waters, respectively. The byssus matrix’s uptake of metal ions was determined by ICP-OES and its surface microstructure investigated by SEM. The results showed that the byssus matrix excellently uptakes metal ions slightly reorganizing its surface micro-structure. As example of its efficiency: 50 mg of byssus absorbed 21.7 mg·g−1 of Cd2+ from a 10 mM solution at pH 7. The adsorption isotherm models of Freundlich and Langmuir were mainly used to describe the system at pH 7 and pH 4, respectively. In conclusion, we showed that the byssus, a waste material that is an environmental issue, has the potential to purify polluted industrial and environmental waters from metal ions.

scholarly journals Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Ilyasse Loulidi ◽  
Fatima Boukhlifi ◽  
Mbarka Ouchabi ◽  
Abdelouahed Amar ◽  
Maria Jabri ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Cost Estimation ◽  
Aquatic Ecosystems ◽  
Adsorption Equilibrium ◽  
Low Cost ◽  
Optimum Conditions ◽  
Spent Coffee Grounds ◽  
Order Model ◽  
Chromium Vi ◽  
Coffee Grounds

Industrial discharges loaded with heavy metals present several problems for aquatic ecosystems and human health. In this context, the present study aims to evaluate the potential of raw spent coffee grounds to remove chromium from an aqueous medium. A structural and textural study of coffee grounds was carried out by FTIR, XRD, and TGA analysis. The optimum conditions for the removal of Cr(VI), for a solution with an initial concentration of 100 mg/l, were adsorbent dose 2.5 g/l, pH 4.0, and contact time 90 min. The adsorption equilibrium results show that the Langmuir isotherm best describes the process with an adsorption capacity of 42.9 mg/g and that the adsorption kinetics follows the pseudosecond-order model. The calculated thermodynamic parameters showed that the adsorption is exothermic and spontaneous. The activation energy value (Ea) indicated that the retention is physisorptive in nature. The regeneration of the adsorbent was carried out by three eluents, among which HCl was the best. Finally, a brief cost estimation showed the great potential of coffee grounds as a low-cost adsorbent.

scholarly journals Adsorption Characteristics of Spent Coffee Grounds as an Alternative Adsorbent for Cadmium in Solution

Environments ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 24 ◽  
Author(s):  
Min-Suk Kim ◽  
Jeong-Gyu Kim
Keyword(s):  
Adsorption Capacity ◽  
Low Cost ◽  
Test Solution ◽  
Initial Solution ◽  
Isotherm Models ◽  
Spent Coffee Grounds ◽  
Solution Ph ◽  
Batch Tests ◽  
Coffee Grounds ◽  
Cd Adsorption

The present study was conducted to ascertain the potential of spent coffee grounds (SCGs) as an alternative adsorbent for the removal of cadmium (Cd) from aqueous solutions. Therefore, Cd adsorption batch tests, using SCGs that had not undergone any chemical pretreatment, were conducted using Cd solutions with a wide concentration range (i.e., 0.1–120 mM) under various adsorption conditions, e.g., ion strength, pH, and solid/solution ratio. For comparison, zeolite, as a well-known common representative adsorbent, was included to determine the adsorption efficiency. The adsorption capacity of the SCGs increased with the decreasing ionic strength of the test solution from 200 to 0 mM of Ca(NO3)2 and the increasing solid:solution ratio from 1:4 to 1:400. The most significant factor influencing the adsorption capacity of the SCGs was the pH of the test solution, with increases in the adsorption capacity as the initial solution pH was increased from 2 to 10. However, the rate for Cd removal remained constant, at 71.19%, when the initial solution pH was between 4 and 8 due to the buffer capacity of SCGs. The obtained data were fitted with the Freundlich, Langmuir, and Dubinin-Radushkevich isotherm models. The Langmuir isotherm provided the best correlation for Cd adsorption onto SCGs (R2 = 0.96) and zeolite (R2 = 0.92), and the maximum Cd adsorption capacity of the SCGs was 19.32 mg g-1, which was higher than that of zeolite (13.91 mg g−1). These results mean that the SCGs can be utilized as alternative low-cost biosorbents to replace conventional adsorption materials.

scholarly journals Feasibility of Vermicomposting of Spent Coffee Grounds and Silverskin from Coffee Industries: A Laboratory Study

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1125
Author(s):  
M.A. González-Moreno ◽  
B. García Gracianteparaluceta ◽  
S. Marcelino Sádaba ◽  
J. Zaratiegui Urdin ◽  
E. Robles Domínguez ◽  
...  
Keyword(s):  
Total Biomass ◽  
Eisenia Andrei ◽  
Spent Coffee Grounds ◽  
Germination Test ◽  
Cocoon Production ◽  
Coffee Silverskin ◽  
Production And Consumption ◽  
Coffee Grounds ◽  
Seed Germination Test ◽  
By Products

In the coffee industry, several by-products are generated during the production and consumption of coffee and represent an important waste from an environmental viewpoint. For improving the knowledge about this issue, a laboratory vermicomposting study of coffee silverskin (CS) and spent coffee grounds (SCG) spiked with mature horse manure (HM) in different proportions and using earthworm Eisenia andrei was carried out. The 60-day study focused on biological parameters such as total biomass gain, growth rate, cocoon production, and mortality. This study also investigated whether the vermicompost obtained could be useful and lacked toxicity through a seed germination test using hybrid wheat seeds. Results showed a disparity depending on the type of residue and the mixture used. Best options were those treatments with a medium–low amount of residue; 25% for SCG and 25% or 50% for CS. In addition, lack of toxicity was confirmed in all treatments. In conclusion, it is possible to carry out a vermicomposting of SCG and CS with some specific features.

Preparation and Characterization of Magnetically Responsive Biosorbents from Coffee Industry Residues

2013 ◽  
Vol 394 ◽  
pp. 3-7 ◽  
Author(s):  
Antonio Zuorro ◽  
Roberto Lavecchia
Keyword(s):  
Adsorption Equilibrium ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Spent Coffee Grounds ◽  
X Ray ◽  
Coffee Grounds ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data

Spent coffee grounds (SCG) and coffee silverskin (CS), the two main coffee industry residues, were magnetically modified by contact with an aqueous ferrofluid containing magnetite nanoparticles. The materials were characterized by SEMEDX analysis, X-ray diffraction and FTIR spectroscopy. Batch adsorption experiments were performed to assess their suitability as biosorbents, using methylene blue as a model pollutant. Adsorption equilibrium data were analysed by the Langmuir model, which allowed estimation of the maximum adsorption capacity. The magnetic biosorbents were easily regenerated by treatment with hydrochloric acid.

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