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Eco-friendly poly (3-hydroxybutyrate)synthesis fron textile wastewaterand its process optimization

100%

Taran M. , Bagheri S. , Bakhtiyari S.

Polish Journal of Environmental Studies

2012

tom 21

nr 5

The textile industry is one of the biggest industries in the world and its wastewater is one of the most important threats to the environment and human health. In this study, the ability of Haloarcula sp. IRU1 to produce poly(3-hydroxybutyrate) (PHB) was investigated using a basal salts medium. Different factors like textile wastewater, yeast extract, and KH₂PO₄ (as carbon, nitrogen, and phosphorus sources, respectively) were optimized to achieve maximum synthesis of PHB by Haloarcula sp. IRU1. Under the optimal conditions of textile wastewater 30% (v/v), yeast extract 0.2% (w/v) and KH₂PO₄ 0.008% (w/v), the highest PHB synthesis (1.54 g/L) occurred in a shake-flask culture. The results provided evidence that Haloarcula sp. IRU1 could be a potential microorganism for production of PHB from textile wastewater in different conditions.

Effects of palm leaf biochar on the availability of soil nutrients, leaf nutrient concentration, and physiological characteristics of melon plants (Cucumis melo L.) under drought stress

100%

Bagheri S. , Hassandokht M. R. , Mirsoleimani A. , Mousavi A.

Acta Agrobotanica

2020

tom 73

nr 1

Examining total concentration and sequential extraction of heavy metals in agricultural soil and wheat

88%

Kahkha M. R. R. , Bagheri S. , Noori R. , Piri J. , Javan S.

Polish Journal of Environmental Studies

2017

tom 26

nr 5

Soil contamination by heavy metals not only directly affects soil physical and chemical properties, reduces biological activity, and reduces soil biological nutrient achievement, but also is considered a serious risk to human health by entering the food chain and environmental security through penetrating groundwater. In this study we examined the concentrations and sequential extractions of such heavy metals as iron, lead, copper, zinc, and nickel in soil and wheat in the central part of Sistan, Iran. 160 soil samples and 160 samples of wheat from 20 specified units of soil of agricultural land of central Sistan were randomly sampled. The values of iron, lead, zinc, nickel, and copper were measured using atomic absorption spectrometry according to the standard method. Average concentrations of iron, nickel, copper, zinc, and lead in terms of mg/kg, respectively, were 9,647.34, 18.56, 7.26, 19.80, and 29.90. After examination of sequential extraction, the metals’ mobilities were as follows: iron (99%)> nickel (33%)> copper (31%)> lead (27%)> zinc (6%). Wheat measurement results showed that metal accumulation in wheat grain was less than other parts. And also the comparison with the standard shows that the values of the metals in agricultural soil in the area were below the World Health Organization standard and in this sense there is nothing wrong with the health of the soil.