Articles
International Journal of Phytoremediation (15497879)25(3)pp. 381-392
The profiles of trace and major elements in three Odontarrhena species from the ultramafics of Western Iran (O. callichroa, O. penjwinensis and O. inflata) were evaluated to provide detailed information on their soil-plant relationships and potentials for agromining. The mean concentrations of Ni in leaf dry matter of these three species were 877, 3,270 and 2,720 mg kg−1, respectively. The mean concentrations of total soil Ni at sites Mazi Ban, Kamyaran and Ghala Ga were 1,470, 2,480, 1,030 mg kg−1, respectively. The Bioconcentration Factor (BCF) for Ni was >1 in O. penjwinensis and O. inflata, but not in O. callichroa. A positive relationship between shoot Ni and soil pH was found for all three species. They display Ni hyperaccumulation in the leaves, but with pronounced variation in the Ni concentrations attained. Odontarrhena penjwinensis emerged as the most promising potential candidate for future Ni agromining. The progress made in this study will enable further consideration of the three Odontarrhena species, especially O. penjwinensis, for any future commercial Ni agromining of the serpentinic ultramafic soils in Western Iran. © 2022 Taylor & Francis Group, LLC.
Journal of Geochemical Exploration (03756742)237
The Ni hyperaccumulator Odontarrhena penjwinensis (Brassicaceae) is a species endemic to the ultramafic soils of Western Iran. Seven ultramafic outcrops and the populations of O. penjwinensis they support were investigated for Ni and other elemental concentrations to assess their potential for future Ni agromining operations. Nickel hyperaccumulation was confirmed in at least one individual plant sampled from all seven populations. The highest and lowest concentrations of Ni in leaves were recorded for two sites (3270 and 660 mg kg−1, respectively). The highest concentrations of Mn, Cr, and Co were 3110, 79, and 193 mg kg−1, respectively. A positive relationship was found between the concentrations of Ni and Fe, and Mg and Ca in roots and shoots. Correlation analysis of edaphic factors also revealed positive correlations between Ni concentration in the shoots, water-holding capacity, and soil pH, whereas it was negatively correlated for soil organic matter. The highest Ni yield (c. 0.4 g per plant), biomass (115 g per plant) and maximum plant height (43 cm) were recorded for one population where the total soil Ni concentration was 2550 mg kg−1. This O. penjwinensis population is likely to be a promising candidate for the development of Ni agromining in the region. © 2022 Elsevier B.V.
Sohrabi, D.,
Jazini, M.,
Mobasheri, S.,
Tohidi, M.,
Shariati, M. Applied Biochemistry and Biotechnology (02732289)194(3)pp. 1178-1192
In the production of natural sausage casings, three layers of serosa, muscular, and mucosa are removed from gastro-intestinal wall of sheep as waste materials. The submocusa layer is taken for further processing. There is no report about generating added value out of these wastes. In this study, a novel approach was introduced for bioconversion of waste gastro-intestinal wall (WGW) to a value-added product. Alkaline hydrolysis of WGW was investigated and the hydrolysate was utilized for cultivation of Dunaliella salina, a value-added biomass. The hydrolysate that contained the highest total soluble protein was used for three sets of cultivations on different medium compositions, i.e., (1) cultivations on the modified Johnson’s medium enriched with different percentage of hydrolysate (0.5, 1, 2.5, 5, and 10 (%v/v)), (2) cultivations on modified Johnson’s medium which was free of nitrogen and carbon sources and enriched with different percentage of hydrolysate (0.5, 1, 2.5, 5, and 10 (%v/v), and (3) cultivation on modified Johnson’s medium which was free of nitrogen source and enriched with 2.5% hydrolysate. The results showed that WGW contained 60.7, 8.4, 15.8, and 15.2% protein, lipid, moisture, and ash, respectively and the enrichment of the medium with the hydrolysate (2.5%) increased biomass productivity by 20%. Additionally, substitution of 2.5% hydrolysate for nitrogen source (KNO3) resulted in the same biomass productivity. The results of this study revealed the potential of the hydrolysate as an alternative for KNO3 in cultivation of D. salina. Overall, this work proposed a novel approach for converting waste gastro-intestinal wall to value. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
