بررسی تأثیر غلظت جریان ورودی به ستون بستر ثابت بر روی حذف کادمیم توسط جاذب کنوکارپوس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه رازی کرمانشاه.

2 استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه رازی کرمانشاه.

3 دانشگاه علوم پژشکی، دانشکده بهداشت محیط، کرمانشاه

چکیده

حضور فلزات سنگین در محیط زیست به دلیل آثار مضر آن­ها بر سلامت انسان، بعنوان یک مشکل تلقی می­گردد. امروزه جاذب های گیاهی با عملکرد بالا برای تصفیه فاضلاب حاوی فلزات سنگین از جمله کادمیم توسعه یافته و نسبت به بقیه جاذب­ها  ارجحیت دارند. هدف از این مطالعه بررسی تأثیر تغییر غلظت جریان ورودی به ستون بر حذف کادمیم  بوسیله جاذب کنوکارپوس می­باشد. کنوکارپوس از مواد زائد گیاهی باغ­های شهر دهلران تهیه و ساختار ظاهری جاذب بررسی شد. در مطالعه حاضر تأثیر غلظت ورودی به ستون بر جذب کادمیم توسط جاذب کنوکارپوس بررسی و از دو مدل آدامز- بوهارت و توماس برای مدلسازی داده­های ستون جذب استفاده شد. نتایج بررسی خصوصیات ظاهری نشان داد که سطح جاذب دارای گودی‌های عمیق بوده و جاذب مورد مطالعه دارای ساختاری پیچیده، درهم، ناهموار و نامنظم می­باشد. نتایج بررسی منحنی­های شکست نشان داد که در غلظت­های بالاتر، شکست بستر در طی زمان کمتری اتفاق می افتد. با افزایش غلظت ورودی به ستون، منحنی­های شکست دارای شیب بیشتر شده و حجم شکست کاهش می­یابد. همچنین مدل آدامز- بوهارت دارای برازش بهتری از داده­های ستون جذب می­باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of effect of influent concentration on cadmium removal in a fixed- bed column using adsorbent Conocarpus

نویسندگان [English]

  • Pejamn poormohammadi 1
  • Masoumeh Farasat 2
  • Behnam Farhadi
  • Meghdad Pirsaheb 3
1 razi university
2 Assistant professor, Department of Water Engineering, Razi University, Kermanshah
3 University of Medical Sciences, Faculty of Environmental Health, Kermanshah, Iran.
چکیده [English]

The presence of heavy metals in the environment due to their harmful effects on human health, regarded as a problem. Today, high-performance biosorbents for wastewater treatment containing heavy metals such as cadmium were developed and are preferable than other absorbents. The aim of this study was investigation of effect of influent concentration on cadmium removal in a fixed- bed column using adsorbent Conocarpus. Conocarpus was prepared from waste vegetable of DEHLORAN city gardens and surface structure of absorbent was investigated. In this study, the effect of influent concentration on cadmium removal wasinvestigatedand Adams- Bohart  and Thomas models were used to the column adsorption modeling. Physical characteristics results showed that the adsorbent has deep pores and complex, intricate, uneven and irregular surface of filamentary structure. The results of breakthrough curves review showed that in higher concentrations, breakthrough time of bed was decreased. breakthrough curves slope increased and breakthrough volume decreased with increasing initial cadmium concentration. Also Adams- Bohart  model has a better fit of the column data

کلیدواژه‌ها [English]

  • Cadmium
  • Conocarpus
  • Fixed- bed column
  • modeling
 
. Seiler, H.G, H. Sigel, A. Sigel. 1988.  Handbook on toxicity of inorganic compounds.
. Park, J.D, Y. Liu, CD. Klaassen. 2001. Protective effect of metallothionein against the toxicity of cadmium and other metals. Toxicology; 163(2):93-100
. Bortoleto, GG, G.T. Macarovscha, S. Cadore. 2004. Determination of cadmium by flame-atomic absorption spectrometry after preconcentration on silica gel modified with cupferron. Journal of the Brazilian Chemical Society, 15(2):313-317
Reddy, D.H.K, S.M. Lee. 2012. Water pollution and treatment technologies. Journal of Environmental & Analytical Toxicology.
.Farzi, S., M.  Farasati, B. Farhadi Bansouleh and M. Pirsaheb. 2018. Evaluation of batch and continuous adsorption kinetic models of cadmium from aqueous solutions using Sugarcane Straw nano-structure absorbent. Desalination and water treatment. 115 (2018) 135–144.
.Farasati, M. Haghighi, S. and S. Boroun. 2016. Cd removal from aqueous solution using agricultural wastes. Desalination and Water Treatment; 57(24). pp.11162-11172.
.Dorado A.D., X. Gamisans, C. Valderrama, M. Sole, C. Lao. 2014. Cr (III) removal from aqueous solutions: A straightforward model approaching of the adsorption in a fixed-bed column. Journal of Environmental Science and HealthPart A; 49(2):179-186.
Padmesh, T.V.N, K. Vijayaraghavan, G. Sekaran, M. Velan. 2005. Batch and column studies on biosorption of acid dyes on fresh water macro alga Azollafiliculoides. Journal of Hazardous Materials; 125:121-129
Samatya S, N. Kabay, U.Y. ksel, Mu. erref Arda, M. Yuksel. 2006. Removal of nitrate from aqueous solution by nitrate selective ion exchange resins. Reactive & Functional Polymers; 66:1206–1214.
Jain M, V.K. Garg and K. Kadirvelu. 2013. Cadmium (II) sorption and desorption in a fixed bed column using sunflower waste carbon calcium–alginate beads. Bioresource technology; 129. pp.242-248.
.Vijayaraghavan, K., J. Jegan, K. Palanivelu, M. Velan. 2004. Removal of nickel (II) ions from aqueous solution using crab shell particles in a packed bed up-flow column. Journal of hazardous materials; 113(1):223-230.
.Zulfadhly, Z., M.D. Mashitah, S. Bhatia. 2001. Heavy metals removal in fixed-bed column by the macro fungus Pycnoporus sanguineus. Journal of Environmental Pollution; 112(3):463-470.
.Thomas, H.C. 1944. Heterogeneous ion exchange in a flowing system. Journal of the American Chemical Society; 66(10):1664-1666
Aksu, Z., F. Gonen. 2004. Biosorption of phenol by immobilized activated sludge in a continuous packed bed: prediction of breakthrough curves. Process Biochemistry; 39:599- 613
.Goel, J. K. Kadirvelu, C. Rajagopal, V.K. Garg. 2005. Removal of lead (II) by adsorption using treated granular activated carbon: Batch and column studies. Journal of Hazard Mater; 125:211-220
.Guler, U.­A., and M. Sarioglu. 2013. Single and binary biosorption of Cu (II), Ni (II) and methylene blue by raw and pretreated Spirogyra sp.: Equilibrium and kinetic modeling. Journal of Environmental Chemical Engineering; 1(3): 369-377.
.Mohan, S.V, S.V. Ramanaiah, B. Rajkumar and P.N. Sarma. 2007. Removal of fluoride from aqueous phase by biosorption onto algal biosorbent Spirogyra sp.-IO2: Sorption mechanism elucidation. Journal of Hazardous Materials; 141(3), 465-474.
.Chao, H.P., C.C. Chang and A. Nieva. 2014. Biosorption of heavy metals on Citrus maxima peel, passion fruit shell, and sugarcane bagasse in a fixed-bed column. Journal of Industrial and Engineering Chemistry; 20(5), pp.3408-3414.
.Shaheen, S.M, F.I. Eissa, Kh.M. Ghanem, Gamal El-Din HM and Al Anany FS. Metal Ion Removal from Wastewaters by Sorption on Activated Carbon, Cement Kiln Dust, and Sawdust.  Water Environment Research; 2014,128: 514-521.
.Unuabonah EJ, Adebowale KO, B.J. Olu-Owolabi, L.Z. Yang and L.X. Kong. 2008. Adsorption of Pb and Cd from aqueous solutions onto sodium tetraborate-modified kaolimiteclay: Equilibrium and thermodynamic studies. Hydrometallurgy; 93: 1-9.
.Nguyen, T.A.H, H.H. Ngo, W.S. Guo, T.Q. Pham, F.M. Li, T.V. Nguyen, X.T. Bui. 2015. Adsorption of phosphate from aqueous solutions and sewage using zirconium loaded okara (ZLO): fixed-bed column study. Science of the Total Environment; 523:40-49.
.Jain M, V.K. Garg, K. Kadirvelu. 2013. Cadmium (II) sorption and desorption in a fixed bed column using sunflower waste carbon calcium–alginate beads. Bioresource technology; 129:242-248.