IOSR-JESTFT   Volume-15 ~ Issue-9 ~ Sep. 2021

Abstract: Bentoniteclay is an aluminum phyllosilicate material that has been extensively studied as a suitable adsorbent for many pollutants. However, the activation of bentonite clay for color removal or bleaching has been reported to improve the porosity, surface area, and adsorption efficiencies. According to literature survey, physical, chemical and pillaring activations using diverse activating agents such as organic/inorganic acids, alkali, thermal or microwave heating, and so on have led to the preparation of highly improved bentonite clay composites, with superior adsorption capacities via cation exchange mechanism or physisorption/chemisorption mechanisms than commercially available adsorbent and inactivated bentonites. Furthermore, the activation of bentonites with biopolymers is an aspect of research that will develop new non-toxic, eco-friendly, and green adsorbent materials with enhanced tunable porosity, thermal stability, and adsorption capacities towards color removal in various oil extracts and gas condensates.

Keywords: Bentonite clay, Color removal, Adsorption, Bentonite activation

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Abstract: Résumé La présente étude a pour objectif, d'évaluer la diversité floristique et vulnérabilité de la végétation ligneuse dans le département de Illela notamment dans quatre villages (Nagaro, Guidan Karo I et II et Mazan korai) de deux communes (Illela et Badaguichiri). A cet effet, un inventaire de la végétation a été effectué dans trois unités d'occupation du sol (couloirs du passage, aires de pâturage etchamps de culture).Aussi, des enquêtes individuelles ont été menées auprès de 60 chefs d'exploitationafin de recenser les espèces ligneuses vulnérables selon leur perception.Les résultats montrent une flore ligneuse très pauvre avec 20 espèces réparties dans 10 familles et 15 genres. La......

Keywords: espèces ligneuse, rare, vulnérable, occupation du sol,Illela, Tahoua, Niger

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Abstract: Supan-supan is the local name for water mimosa, an aquatic weed found in South Kalimantan's Lebak swamp. It is consumed by some as an indigenous vegetable. A study on the effect of water and fertilizer types on yield and protein content on Ultisol soil media has been carried out in Banjarbaru from May to June 2021. The experimental design used was a factorial completely randomized design consisting of two treatments. The first treatment was the type of water which consisted of tap water and swamp water. The second treatment was a type of fertilizer consisting of chicken manure, NPK, and water hyacinth bokashi. The doses of the three types of fertilizers were equalized based on the N content......

Keywords: Indigenous vegetables, legume, nitrogen, water mimosa, wetlands

[1]. Atabaki N., Shaharuddin N.A., Ahmad S.A., Nulit R., & Abiri R. (2020). Assessment of water mimosa (Neptunia oleracea Lour.) morphological, physiological, and removal efficiency for phytoremediation of arsenic-polluted water. Plants (9) : 1500, 2 -24. https://doi.org/10.3390/plants9111500
[2]. Chen J.B., Dong C.C., Yao X.D., & Wang W. (2017). Effects of nitrogen addition on plant biomass and tissue elemental content in different degradation stages of temperate steppe in northern China. Journal of Plant Ecology, 11(5) : 730–739. https://doi.org/10.1093/jpe/rtx035
[3]. Hei Z., Xiang H., Zhang J., Liang K., Zhong J., Li M., & Lu Y. (2021). Rice intercropping with water mimosa (Neptunia oleracea Lour.) can facilitate soil N utilization and alleviate apparent N loss. Agriculture,Ecosystems and Environment, 313, 107378. https://doi.org/10.1016/j.agee.2021.107378
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Abstract: Although environmental concerns are nothing new, it has been only recently that environmental issues have been considered as having national security implications. Along with increased environmental awareness, security planners now include nonmilitary concerns, including the environment, into what has traditionally been a military-oriented policy. Though beginning to take place, this transition or "broadening" of national security policy to include these issues is proving slow and controversial. The nature of environmental issues is such that their inclusion into a national security framework is not an easy one, especially due to the challenge posed by overpopulation. Overpopulation has become a key demographic factor affecting policies and decision-making processed, and thus plays a key role in the demarcation of policies to counter environmental degradation......

Keywords: Sustainability, Degradation, Overpopulation, Policymaking

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Abstract: Background of Study: Engineers are faced with the problem of providing very suitable materials for highway and other foundation construction. Owing to this fact, many researches has been carried out and still on-going by individuals, firms and institutions on ways to improve the engineering properties and characteristics of soils. The most accessible soil may lack some engineering properties to bear the expected loads, so improvements have to be made to make these soils better [3]. Soil type is one of the key features used to determine which method and material should be used for achieving best compaction [9]. In this regard, this study aims to assess the suitability of bamboo leaf ash as stabilization material for lateritic soil.......

Keywords: Soil Stabilization, Lateritic Soil, Bamboo Leaf ash, Soil.

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