نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه صنعتی سیرجان، سیرجان، ایران
2 بخش مهندسی عمران، دانشگاه صنعتی سیرجان، سیرجان، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
One of the factors contributing to the water pollution is heavy metals that excessive amounts of them cause problems for human health and the environment. In the present study, herbal extracts of Chamomile and Green tea as a manganese reducing agents were used to prepare adsorbents of sepiolite clay compounds and the effect of pH, ionic strength and adsorbent amount were investigated. Adsorbents were analyzed by FE-SEM and Nano-Mn were observed on surfaces. High amounts of Mn along with Si and Al revealed the modification of clay soil. XRF results demonstrated that adding Mn to sepiolite clay soil lead to reducing Mn amount. The results showed that with increasing pH, nickel removal efficiency increased. The highest amount of Ni ion adsorption was obtained by chamomile absorbent (8.64 mg/g). The adsorption values of heavy metal ion of Ni with its initial concentration is in the reverse trend. The results demonstrated that the adsorption rate of Ni in the solution has a straight relation with the amount of adsorbent, but there was no significant effect on the Ni adsorption when the amount of adsorbent is increased from 1 gram to 2 grams and then 5 g.
کلیدواژهها [English]
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