No abstract

The use of bio-polymers due to bio-degradability and low cost has been considered for the removal of heavy metals from water and wastewater. Chitosan polymer is a hydrophilic Cation that removes acetyl ketamine from the alkaline environment and is widely used as a sorbent for the removal of heavy metals. Chitosan is a biopolymer that has been widely used in a variety of fields, such as bio-medicine, water purification and food industries, due to its low prices and biological properties, such as biodegradability, antibacterial and harmlessness. After preparation, it was measured by atomic absorption and FT-IR methods. The impact of various parameters such as: pH, metal ion density, amount of adsorbent and the duration of mixing was studied to provide stable and optimal conditions for determining the selectivity of removing heavy metals from copper and nickel. The absorption isotherm was studied by Langmuir and Freundlich models. The results show that the adsorption rate with chitosan agent is optimized at pH = 5, the time of 30 minutes and the amount of adsorbent 120 mg and the concentration of ion 4 mg with an absorption of 99% and the amount of adsorption with operating chitosan in optimized conditions at pH = 9, the duration of 5 minutes and the absorbance of 100 mg and the concentration of ion 2 mg with absorption is 93.8%.

This paper sets out to examine the differences in people's reactions to each other as a function of dress style to see how a stranger clothed in different modes of dress is reacted against. Effects of two dress conditions, the former normally worn by upper-middle class members of society and the latter often worn by lower-class members (style A and style B, hereafter), were investigated under controlled conditions. To this end, three female housewives clothed in the two sets of polar garment styles were selected as buyers to have shopping experiences in different settings. Results indicated that participants (clients) of the study received different reactions from their respondents (sellers) in the two different conditions of dressing. In other words, participants in style A were accepted more readily than when they were dressed in the style B. This seems to indicate that clothing has a great impact on social interaction and impression management.