Research Article
Effect of Organic Amendments on Selected Heavy Metals (Cd, Cr and Pb) Uptake by Tomato (Lycopersicon Esculentum Miller) Plant
Dagne Bekele*,
Lijalem Abeble,
Mohammed Yimam
Issue:
Volume 9, Issue 4, December 2023
Pages:
138-146
Received:
Oct. 05, 2023
Accepted:
Oct. 23, 2023
Published:
Nov. 11, 2023
DOI:
10.11648/j.ajasr.20230904.11
Downloads:
Views:
Abstract: The accumulation of heavy metals in agricultural products and soil is a serious issue since it affects crop development and productivity as well as food safety and marketability. Global interest in the cleanup of heavy metal-contaminated soils has grown. The amendment of contaminated soil with organic materials is considered an environmentally friendly technique to immobilize heavy metals and minimize their subsequent bioaccumulation in plants. The aim of this experiment was to remediate waste Akaki River-irrigated Akaka irrigation farm soil with organic materials (animal manure, compost, and vermicompost) in a pot experiment with 3%, 6%, and 9% rates of organic material and contaminated soil in a greenhouse with ten treatments. Soil Comparative research on the impact of organic soil additives on heavy metal remediation from contaminated soil with heavy metals (Cd, Pb, and Cr) and the uptake of these elements by tomato (Lycopersicon esculentum Miller) plants was carried out. Also, the heavy metal removal efficiency of organic additives from contaminated soil was examined, and vermicompost showed good removal efficiency compared to compost and animal manure. Organic amendments led to decreased heavy metal content in tomatoes and this decrease was best expressed with 9% vermicompost. It shows with increasing amount of organic materials the heavy metal removal efficiency also increases. Organic amendments were especially effective in reducing the lead content of tomatoes.
Abstract: The accumulation of heavy metals in agricultural products and soil is a serious issue since it affects crop development and productivity as well as food safety and marketability. Global interest in the cleanup of heavy metal-contaminated soils has grown. The amendment of contaminated soil with organic materials is considered an environmentally frie...
Show More
Research Article
Reconfiguration of the Global Geopolitical Map: Challenges and Perspectives
Mario González Arencibia,
Emilio Horacio Valencia Corozo,
Dania Onora De León Nazareno
Issue:
Volume 9, Issue 4, December 2023
Pages:
147-162
Received:
Oct. 24, 2023
Accepted:
Nov. 08, 2023
Published:
Nov. 17, 2023
DOI:
10.11648/j.ajasr.20230904.12
Downloads:
Views:
Abstract: The reconfiguration of the global geopolitical map is a topic of great relevance today due to the transformations taking place in the international arena, which are influencing relations between countries. Several factors are contributing to this reconfiguration. On one hand, there are changes in the global economy, with the rise of emerging countries such as China and India challenging the economic and political hegemony of the United States and Europe. Additionally, there is an increase in geopolitical rivalry between powers, such as the competition between the United States and China for influence in the Asia Pacific and Latin America, as well as tensions between Russia and the European Union in Eastern Europe. In light of this context, several questions arise: What are the main challenges faced by the international community in this reconfiguration of the geopolitical map? What prospects can be glimpsed for the future? What is the role of international organizations in this scenario? The objective of this study is to analyze the challenges and prospects of the reconfiguration of the global geopolitical map. To do so, a documentary review was conducted using specialized databases in international relations and geopolitics. A random sample of important documents that comprehensively address the topic was selected. The findings reveal that the challenges of geopolitical reconfiguration are numerous and include the risk of regional conflicts and the threat of nuclear proliferation. Various perspectives are identified, such as the strengthening of regional alliances and the need to establish new mechanisms of international cooperation. In conclusion, the reconfiguration of the global geopolitical map poses a series of challenges and prospects that must be adequately addressed by the international community. It is crucial to promote cooperation among countries and strengthen international institutions to address the challenges that arise in this new global scenario.
Abstract: The reconfiguration of the global geopolitical map is a topic of great relevance today due to the transformations taking place in the international arena, which are influencing relations between countries. Several factors are contributing to this reconfiguration. On one hand, there are changes in the global economy, with the rise of emerging countr...
Show More
