Author/Authors :
Omidi-Khaniabadi, yusef Department of Environmental Health Engineering - School of Health - Lorestan University of Medical Sciences, Khorramabad, Iran , Kamarehei, bahram Department of Environmental Health Engineering - School of Health - Lorestan University of Medical Sciences, Khorramabad, Iran , Nourmoradi, heshmatollah Department of Environmental Health Engineering - School of Health - Ilam University of Medical Sciences, Ilam, Iran , Jourvand, M. Department of Environmental Health Engineering - School of Health - Lorestan University of Medical Sciences, Khorramabad, Iran , Basiri, H. Department of Environmental Health Engineering - School of Health - Lorestan University of Medical Sciences, Khorramabad, Iran , Heidari, S. Department of Environmental Health Engineering - School of Health - Lorestan University of Medical Sciences, Khorramabad, Iran
Abstract :
in this study, montmorillonite (MMT) modified with a cationic surfactant (Hexadecyl trimethyl ammonium bromide, (HDTMA)) was used for the removal of methyl red (MR) from aqueous solution. The effect of different parameters like surfactant loading rate, contact time, pH, adsorbent dosage and initial MR content was investigated on the sorption. The sorption capacity was increased by increasing the surfactants loading rate up to 120% cation exchange capacity (CEC) of the MMT. The optimum uptake capacity of the sorbent (84.28 mg/g) was achieved within 30 min at pH of 6. The experimental data of the sorption was well fitted by pseudo-second-order kinetic and Freundlich isotherm models. The results showed that the HDTMA-MMT can be applied as an effective and inexpensive sorbent for the removal of MR from aqueous solution.
Farsi abstract :
در اﯾﻦ ﻣﻄﺎﻟﻌﻪ، ﻣﻮﻧﺖ ﻣﻮرﯾﻨﻮﻟﯿﺖ (MMT) اﺻﻼح ﺷﺪه ﺑﺎ ﯾﮏ ﺳﻮرﻓﮑﺘﺎﻧﺖ ﮐﺎﺗﯿﻮﻧﯽ (ﻫﮕﺰا دﺳﯿﻞ ﺗﺮي ﻣﺘﯿﻞ آﻣﻮﻧﯿﻮم ﺑﺮوﻣﺎﯾﺪ، HDTMA ) ﺑﺮاي ﺣﺬف ﻣﺘﯿﻞ رد از ﻣﺤﻠﻮل آﺑﯽ اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. اﺛﺮ ﭘﺎراﻣﺘﺮﻫﺎي ﻣﺨﺘﻠﻒ ﻣﺎﻧﻨﺪ ﻣﯿﺰان ﺑﺎرﮔﺬاري ﺳﻮرﻓﮑﺘﺎﻧﺖ، زﻣﺎن ﺗﻤﺎس، ﭘﯽ اچ، دوز ﺟﺎذب وﻏﻠﻈﺖ اوﻟﯿﻪ ﻣﺘﯿﻞ رد روي ﻇﺮﻓﯿﺖ ﺟﺬب، ﺑﺮرﺳﯽ ﮔﺮدﯾﺪ. ﻇﺮﻓﯿﺖ ﺟﺬب ﺟﺎذب ﺑﺎ اﻓﺰاﯾﺶ ﻣﯿﺰان ﺑﺎرﮔﺬاري ﺳﻮرﻓﮑﺘﺎﻧﺖ ﺗﺎ 120% ﻇﺮﻓﯿﺖ ﺗﺒﺎدل ﯾﻮﻧﯽ ﻣﻮﻧﺖ ﻣﻮرﯾﻨﻮﻟﯿﺖ، اﻓﺰاﯾﺶ داﺷﺘﻪ اﺳﺖ. ﻇﺮﻓﯿﺖ ﺟﺬب ﺑﻬﯿﻨﻪ ﺟﺎذب (84/28 ﻣﯿﻠﯽ ﮔﺮم ﺑﺮ ﮔﺮم) در زﻣﺎن 30 دﻗﯿﻘﻪ و ﭘﯽ اچ ﺑﺮاﺑﺮ 6 ﺑﺪﺳﺖ آﻣﺪ. داده ﻫﺎي آزﻣﺎﯾﺸﮕﺎﻫﯽ ﺑﻪ ﺧﻮﺑﯽ ﺑﺎ ﻣﺪل ﻫﺎي ﮐﯿﻨﺘﯿﮏ درﺟﻪ دوم ﮐﺎذب و اﯾﺰوﺗﺮم ﻓﺮوﻧﺪﻟﯿﭻ ﻣﺘﻨﺎﺳﺐ ﺑﻮدﻧﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ HDTMA-MMT ﻣﯿﺘﻮاﻧﺪ ﺑﻪ ﻋﻨﻮان ﯾﮏ ﺟﺎذب ﻣﻮﺛﺮ و ارزان ﺑﺮاي ﺣﺬف ﻣﺘﯿﻞ رد از ﻣﺤﻠﻮل آﺑﯽ ﺑﮑﺎر ﺑﺮده ﺷﻮد
Keywords :
Adsorption , Montmorillonite , Surfactant , Methyl Red
