scholarly journals Coffee Pulp: A Sustainable Alternative Removal of Cr (VI) in Wastewaters

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 403 ◽  
Author(s):  
Dora Luz Gómez Aguilar ◽  
Juan Pablo Rodríguez Miranda ◽  
Javier Andrés Esteban Muñoz ◽  
Jhon Fredy Betancur P.
Keyword(s):  
Agricultural Waste ◽  
Chemical Species ◽  
Maximum Adsorption Capacity ◽  
The Sustainable Development ◽  
Coffee Pulp ◽  
Charge Potential ◽  
Removal Of Heavy Metals ◽  
Stirring Time ◽  
Ir Spectrophotometry ◽  
Development Goals

Currently, agricultural waste is proposed as a sustainable alternative in the removal of heavy metals present in industrial wastewater, to fulfill some of the goals proposed in the Sustainable Development Goals stated for the 2030 Agenda, in particular in Sections 3.9 and 6.9. Considering this context, the coffee pulp (Castilla variety) of Caldas municipality (Colombia) was used in study for the removal of one of the most toxic chemical species of chromium: Cr (VI). Therefore, the agricultural residue was subjected to a bromatological characterization, determination of the lignocellulosic composition and elucidation of characteristic organic functional groups by IR spectrophotometry. Additionally, the optimal parameters for contaminant removal were identified, regarding particle size, biomass quantity, optimum pH, stirring time, temperature, adsorption kinetics, zero charge potential (pHpzc) and adsorption isotherms, to analyze the kinetic model that fitted the process, the explanation of the possible adsorption mechanism between the contaminant, the surface of the coffee pulp and the capacity of maximum adsorption, respectively. Finally, the innovation of the research is discussed considering two criteria: First, when a mixture was made in different proportions between two agricultural residues (coffee pulp and plantain pseudostem) to show if there was an increase in the removal of the contaminant under the same optimal conditions found experimentally; and the second criterion, the comparison of the maximum adsorption capacity, with the percentages of removal carried out by other authors using the pulp of unmodified coffee.

scholarly journals Biosorption of Pb(II) Using Coffee Pulp as a Sustainable Alternative for Wastewater Treatment

2021 ◽  
Vol 11 (13) ◽  
pp. 6066
Author(s):  
Dora Luz Gómez-Aguilar ◽  
Juan Pablo Rodríguez-Miranda ◽  
Deisy Baracaldo-Guzmán ◽  
Octavio José Salcedo-Parra ◽  
Javier Andrés Esteban-Muñoz
Keyword(s):  
Wastewater Treatment ◽  
Agricultural Waste ◽  
Green Technology ◽  
Point Of Zero Charge ◽  
Cellulose Content ◽  
The Sustainable Development ◽  
Coffee Pulp ◽  
Biosorption Process ◽  
Optimum Ph ◽  
Development Goals

The present research shows the results obtained from the biosorption process of Pb, using coffee pulp as a biosorbent in synthetic waters. To do this, the lignin and cellulose content and the percentage of removal of Pb2+ ions was determined; additionally, the sorption’s optimal variables, such as the optimum pH, the point of zero charge (pHpzc), the kinetics and the adsorption isotherm, were determined. A comparison was made with other by-products derived from coffee crops. According to the results obtained in this research, the cellulose percentage was 29.12 ± 0.22% and the lignin percentage was 19.25 ± 0.16% in the coffee pulp, the optimum pH was 2.0 units and the kinetic model, which adjusted to the biosorption’s process, was the pseudo-second order of Ho and McKay, presenting an isotherm of Langmuir’s model and pHpzc of 3.95 units. Lastly, the removal of the pollutant was 86.45%, with a capacity of maximum adsorption of 24.10 mg·g−1 obtained with a particle size of 180 µm, time of contact of 105 min and at 100 RPM. Finally, we express that (a) the coffee pulp can be used as a sustainable alternative for the removal of the pollutant mentioned in synthetic and/or industrial wastewater matrices, to meet goals 3.9 and 6.9 of the Sustainable Development Goals of the 2030 agenda, and (b) the novelty of this research is the use of an agricultural waste of easy acquisition as a sorbent, without chemical modification, since it presented a high percentage of efficiency in the removal of Pb2+ ions. In turn, the challenge of this research is implementing this green technology on a pilot, semi-industrial and/or industrial scale in wastewater treatment systems.

scholarly journals Removal of Zn(II) in Synthetic Wastewater Using Agricultural Wastes

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1465
Author(s):  
Dora Luz Gómez Aguilar ◽  
Juan Pablo Rodríguez Miranda ◽  
María Xóchitl Astudillo Miller ◽  
Rayma Ireri Maldonado Astudillo ◽  
Javier Andrés Esteban Muñoz
Keyword(s):  
Agricultural Waste ◽  
Green Technology ◽  
Agricultural Wastes ◽  
Synthetic Wastewater ◽  
Point Of Zero Charge ◽  
Maximum Adsorption Capacity ◽  
The Sustainable Development ◽  
Coffee Pulp ◽  
Optimum Ph ◽  
Linearized Model

In the present investigation, results obtained from the process of the biosorption of Zn(II) in synthetic wastewaters are presented, using three agricultural wastes (coffee pulp, banana pseudo-stem, and corncob). Firstly, the percentage of lignin and cellulose for each material was determined. Then, using the free software XLSTAT, the waste with the highest removal for this metal was selected and, after this, the optimum pH, kinetics, adsorption isotherm, and point of zero charge (pHpzc) were found. Finally, a comparison with other lignocellulosic materials derived from banana, corn, and coffee crops was carried out. According to the results obtained, coffee pulp was the material that showed a high removal compared to the other two (63.58%), for which the optimum pH was 5.0 units. The kinetic model, which was adjusted to the process of biosorption, was the pseudo second order of Ho and McKay, which in turn presented an isotherm of Langmuir’s linearized model where the maximum adsorption capacity with that waste was 13.53 mg × g−1, obtained with a particle size of 180 µm, contact time of 90 min at 100 RPM, temperature of 25 °C, and pHpzc 3.95 units. Lastly, the authors state that this type of agricultural waste can be used as a green technology in the treatment of wastewater, particularly in the removal of the aforementioned pollutant, in order to fulfill goals 3.9 and 6.9 of the Sustainable Development Goals of the 2030 Agenda; to the level of challenge of the research, the authors propose for the future to carry out the implementation of this type of waste, without chemical modification, in the treatment of wastewater for the removal of the mentioned pollutant in a pilot study with different wastewaters and industries.

scholarly journals Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2500 ◽  
Author(s):  
Dora Luz Gómez Aguilar ◽  
Juan Pablo Rodríguez Miranda ◽  
Deisy Baracaldo Guzmán ◽  
Javier Andrés Esteban Muñoz
Keyword(s):  
Heavy Metals ◽  
Lignin Content ◽  
Attenuated Total Reflection ◽  
Synthetic Wastewater ◽  
Maximum Adsorption Capacity ◽  
Cellulose Content ◽  
The Sustainable Development ◽  
Coffee Pulp ◽  
Adsorption Mechanisms ◽  
Optimum Ph

This research focuses on the removal of contaminants from wastewaters as a matter of great interest in the field of water pollution. The first decades of the 21st century have brought numerous approaches for the development of cheaper and more effective adsorbents capable of eliminating heavy metals. The study aims to examine the way coffee pulp (Castilla variety from Caldas, Colombia) was used as a bioadsorbent for the removal of Mn (II) from synthetic wastewater to fulfill goals 3 and 6 proposed in the Sustainable Development Goals stated for the 2030 Agenda, particularly in Sections 3.9 and 6.9. In order to achieve this objective, the agricultural residue was subjected to bromatological characterization, determination of the lignocellulosic composition, and identification of characteristic organic functional groups through IR spectrophotometry, using the ATR (attenuated total reflection) technique. Additionally, the optimal parameters for contaminant removal were identified, regarding the biomass quantity, the optimum pH, the stirring time, the adsorption kinetics, the zero charge potential (pHpzc), the adsorption isotherms, and the explanation of the possible adsorption mechanisms between the contaminant, the surface of the coffee pulp, and the capacity of maximum adsorption. The results show that lignocellulosic material presented a cellulose content of 29.93 ± 0.21% and a lignin content of 19.25 ± 0.16%. The optimum parameters found were as follows: Particle size of 180 µm, contact time from 90 min to 100 RPM, optimum pH of 4.0 pH units, room temperature; the kinetic model adjusted to the bioadsorption process was Ho and McKay’s pseudo-second-order, under an isotherm of the Langmuir model, for which the removal presented was 53.40%, with a maximum adsorption capacity of 8.01 mg·g−1. Finally, the novelty of the reported research consists of using coffee pulp as a bioadsorbent without chemical modification, for the removal of heavy metals, in this case Mn (II), in industrial wastewater, which would be another application of this coffee by-product.

History, Heritage and Sustainable Development: A Position Statement on the Scottish Highlands

2018 ◽  
Vol 9 (1) ◽  
pp. 1-16
Author(s):  
S. Karly Kehoe ◽  
Chris Dalglish
Keyword(s):  
Sustainable Development ◽  
Rural Communities ◽  
Position Statement ◽  
The Sustainable Development ◽  
Scottish Highlands ◽  
The Past ◽  
Taking Charge ◽  
Rural World ◽  
Development Goals ◽  
Crucial Part

Evidence of how history and culture have been or should be harnessed to promote sustainability in remote and rural communities is mounting. To be sustainable, development must come from within, it must serve future generations as well as those in the present and it must attend to the vitality of culture, society, the economy and the environment. Historical research has an important contribution to make to sustainability, especially if undertaken collaboratively, by challenging and transcending the boundaries between disciplines and between the professional researchers, communities and organisations which serve and work with them. The Sustainable Development Goals’ motto is ‘leaving no one behind’, and for the 17 Goals to be met, there must be a dramatic reshaping of the ways in which we interact with each other and with the environment. Enquiry into the past is a crucial part of enabling communities, in all their shapes and sizes, to develop in sustainable ways. This article considers the rural world and posits that historical enquiry has the potential to deliver insights into the world in which we live in ways that allow us to overcome the negative legacies of the past and to inform the planning of more positive and progressive futures. It draws upon the work undertaken with the Landscapes and Lifescapes project, a large partnership exploring the historic links between the Scottish Highlands and the Caribbean, to demonstrate how better understandings of the character and consequences of previous development might inform future development in ways that seek to tackle injustices and change unsustainable ways of living. What we show is how taking charge of and reinterpreting the past is intrinsic to allowing the truth (or truths) of the present situation to be brought to the surface and understood, and of providing a more solid platform for overcoming persistent injustices.

National Human Rights Institutions and Sustainable Development with Specific Reference to Selected African Examples

2020 ◽  
Vol 53 (1) ◽  
Author(s):  
John Mubangizi
Keyword(s):  
Sustainable Development ◽  
Human Rights ◽  
Best Practice ◽  
Specific Reference ◽  
African Countries ◽  
The Sustainable Development ◽  
Study Approach ◽  
National Human ◽  
Development Goals ◽  
National Human Rights Institutions

That National Human Rights Institutions (NHRIs) play an important role in the protection and promotion of human rights is a well-known fact. This has been widely acknowledged by the United Nations (UN). Also well-known is the fact that several African countries have enacted new constitutions during the last two to three decades. One of the most salient features of those new constitutions is that they establish NHRIs, among other things. Given their unique role and mandate, these NHRIs can and do play an important role in the realisation of the sustainable development goals contained in the UN 2030 Agenda for Sustainable Development. Adopting a case study approach, this article explores the role NHRIs have played in the promotion and protection of human rights in selected African countries and implications for sustainable development in those countries. The main argument is that there are several lessons African countries can learn from each other on how their NHRIs can more meaningfully play that role. Accordingly, best practice and comparative lessons are identified and it is recommended that NHRIs can contribute to sustainable development more meaningfully if they can make themselves more relevant, credible, legitimate, efficient and effective.

Analysis of pre-service teachers’ perception towards the economic, environmental, social and cultural dimensions of Education for Sustainable Development

Think India ◽  
2019 ◽  
Vol 22 (3) ◽  
pp. 972-978
Author(s):  
Manisha Jetly ◽  
Dr. Nandita Singh
Keyword(s):  
Sustainable Development ◽  
Environmental Sustainability ◽  
Qualitative Content Analysis ◽  
Holistic Approach ◽  
Education For Sustainable Development ◽  
Cultural Dimensions ◽  
The Sustainable Development ◽  
Depth Study ◽  
Development Goals ◽  
Class Room

Education for sustainable development (ESD) enjoys a huge momentum worldwide in which the role of teachers for making sustainable development goals a reality has been recognized significantly. Teachers through their knowledge, attitudes and skills can bring the learning about these concepts to the curriculum and class room interaction and are in a position to influence their students. Therefore it is pertinent, that teachers are sensitised towards these issues, so that they prepare and nurture their students for making appropriate and responsible choices which contribute to a sustainable future. At this juncture it becomes crucial to understand their priorities and awareness level in context of the sustainable development. The present research paper aims to analyse the perception of forty post graduate pre-service teachers of the Chandigarh region, towards ESD through the dimensions of economic sustainability, environmental sustainability, social sustainability and cultural sustainability. For this researchers have adopted qualitative content analysis methodology for an in-depth study of the subjective responses through an open ended question. The findings suggest that most of the respondents associated the perception of ESD strongly with environmental sustainability. It is noted that the pre-service teachers lack a holistic approach towards ESD. On the basis of the findings it is recommended that there is an urgent need of integrating the concept of ESD consciously and conscientiously in India’s teacher education programmes.

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