بررسی تاثیر اسید نیتریک با نرمالیته های مختلف بر کارایی اسکوریا در حذف رنگ مالاشیت از محیط های آبی: تعیین مدل، ایزوترم و سینتیک واکنش
الموضوعات :کیومرث شرفی 1 , عبداله درگاهی 2 , ناهید عزیزی 3 , ژیلا امینی 4 , مهدی غایب زاده 5 , زهرا رضایی 6 , مسعود مرادی 7
1 - دانشجوی دکترای تخصصی مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران
2 - دانشجوی دکترای تخصصی مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی اردبیل، اردبیل، ایران
3 - دانشجوی کارشناسی ارشد، کمیته تحقیقات دانشجویی، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران
4 - دانشجوی کارشناسی ارشد، کمیته تحقیقات دانشجویی، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران
5 - دانشجوی دکترای تخصصی مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تبریز، تبریز، ایران
6 - دانشجوی کارشناسی ارشد، کمیته تحقیقات دانشجویی، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران
7 - دکترای تخصصی مهندسی بهداشت محیط، مرکز تحقیقات عوامل محیطی مؤثر بر سلامت دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران*(مسوول مکاتبات)
الکلمات المفتاحية: اسید نیتریک, اسکوریا, مالاشیت, مدل, ایزوترم, سینتیک واکنش,
ملخص المقالة :
زمینه و هدف: رنگ مالاشیت به دلیل ویژگی های ساختاری قابلیت تجزیه بسیار کمی داشته و در محیط های آبی به سختی حذف می شود. با توجه به تاثیر اسید نیتریک بر ویژگی های فیزیکی و شیمیایی اسکوریا، هدف از این مطالعه بررسی کارایی فرم های مختلف اصلاح شده اسکوریا با اسید نیتریک 1، 6 و 12 نرمال در حذف رنگ مالاشیت از محیط های آبی می باشد. روش بررسی: فرایند جذب در شرایط آزمایشگاهی در pH، دوز جاذب، زمان های تماس مختلف و غلظت ثابت رنگ انجام شد. سپس غلظت باقیمانده در محلول رنگ از طریق جذب بوسیله دستگاه اسپکتروفتومتر (Cary 50 ساخت کمپانی (Perkin Elmerدر طول موج nm 665 اندازه گیری شد. جهت تعیین حجم نمونه نیز از برنامه نرم افزاری DOE استفاده گردید. همچنین به منظور درک چگونگی جذب، داده های بدست آمده با ایزوترم های جذب لانگمیر، فروندلیچ و سینتیک های واکنش شبه درجه اول و دوم برازش داده شدند.. یافته ها: نتایج نشان داد که با افزایش نرمالیته اسید، pH، مقدار جاذب و زمان تماس، کارایی جاذب در حدف رنگ افزایش می یابد، بطوری که بیشترین راندمان حذف (100٪) برای جاذب های اصلاح شده با اسید نیتریک 1، 6 و 12 نرمال در 11 = pH ، مقدار جاذب 4/1 گرم در لیتر و زمان 75 دقیقه به دست آمد. همچنین جذب رنگ از هر دو ایزوترم لانگمیر و فروندلیچ و سینتیک شبه درجه دوم تبعیت مناسبی داشت. بحث و نتیجه گیری: با توجه به نتایج می توان گفت که جذب رنگ هم به صورت چند لایه ای و تک لایه ای صورت می گیرد و اصلاح اسکوریا با اسید نیتریک به دلیل تغییرات وسیع شیمیایی(بویژه نسبت سیلیکا به آلومینا) در ساختار جاذب موجب افزایش کارایی آن نسبت به اسکوریا طبیعی می شود.
- Andre B, Santos D, Francisco J, Jules B, Lier V. Review paper on current technologies for decolourisation of textile wastewater: Perspectivs for anaerobic biotechnology. Bioresour. Technol. 2007; 98:2369-2385.
- Shokoohi R, Dargahi A, Amiri R, Ghavami Z. Evaluation of US/S2O8-2 compilative process performance in the removal of Erythrosine B dye from aqueous solution. Journal of Advances in Environmental Health Research. 2018;1;6(1):1-8.
- Banat F, Al-Ahmad R, Bni –Khalid F. Bench-scale and packed bed sorption of methylene blue using treated olive pomace and. Charcoal Bioresour Technol.2007;98:3017-3025
- Pirsaheb M, Zinatizadeh AA, Dargahi A. Performance Evaluation of Coagulation Process in Removal of Low Turbidity and Color from Water Using Different Inorganic Coagulants. Journal of water and wastewater. 2012;23(1): 111-118. (In Persian)
- Gupta VK, Mittal A, Krishnah L, Gajbe V.Adsorption kinitics and column operations for the removal and recovery of malachite green from wastewater using bottom ash. Sep.Purif Technology 2004; 87-96.
- Zhang J, Li Y, Zhang C, Jing Y. Adsorption of malachite green from aqueous solution onto carbon prepared from Arundo donax root. Journal of Hazardous Materials 2008; 150: 774-782.
- Almasi A, Amirian F, Mohammadi M, Yari A R, Dargahi A, Ahmadidoust G. Evaluation Low Cost Adsorbent of Walnut Bark Granule for Methylene Blue Dye Removal from Aqueous Environments. Arch Hyg Sci. 2018; 7 (2) :112-117.
- Sharma YCU. Removal of Malachite Green from Aqueous Solutions by Adsorption on to Timber Waste. International Journal of Environmental Engineering and Management 2013; 4(6): 631-638. http://www.ripublication.com/ ijeem.htm
- Akbal F, Akdemir N, Onar AN. FT-IR spectroscopic detection of pesticide after sorption on to modified pumice. Talanta 2000; 53:131-135.
- Wesley LD. Determination of specific gravity and void ratio of pumice matrials. Geotech Test J 2001; 24:418-422.
- Kitis M, Kaplan SS, Karakaya E, Yigit NO, Civelekoglu G. Adsorption of natural organic Matter (NOM) from waters by iron coted pumice. Chemospher 2007; 66:130-138.
- Geitgey RP. pumice and volcanic cider In: carr ,D.D.(ED),Industrial Minerals and Rocks.,Society for Mining, Metallurgy,and Exploration . littleeton Co USA PP 1994;803-813.
- Bassari A, Akyuz T, Kurtcebe T. The removal of Th, Cs and Sr ions from solution using granulated pumice stone. J Inclusion phenommol 1996; 26:83-88.
- Njau KN, Minja RJA, Katima J HY. Pumice soil:Apotential wetland substrate for treatment of domestic wastewater. Water Sci Technol 2003; 48:85-92.
- Lale M, Temocim Z, Bag N. Sorption behavior of copper (Ц), zinc (Ц) and nickel (Ц) on formaldehyde cross-linked Saccharomyces cerevisias immobilized on pumice stone. Fresenius Environ Bull 2001; 10:736-740.
- Esmaili A, Nasseri S, Mahvi AH. Adsorption of divalent copper and nickel from aqueous solutions by a natural mineral cartridge (volcanic ash). Journal of Hormozgan University of Medical Sciences 2004:8(1):33-39. (In Persian)
- Wohanka W, Lendtke H, luebke M. optimization of slow filtration as ameans of disinfecting nutrient solution. Acta HORTIC 1999; 481:539-543.
- Farizoglu B, Nuhoglu A, Yildis E, Keskinler B.The performance of pumice as filter bed matrial under rapid filtration condition filter. 2003; 40:41-46.
- Rachel A, Rao KVS, Subrahmanyam M, Boule P. Immobilization of Tio2 on pumice stone for the photocatalyti degradation of dyes and dye industry pollutants. Appl CATAL b Environ 2003; 46:77-85.
- Rachel A, Lavedrine B, Subrahmanyam Boule MP.Use of porous lavas as supports of photocatalysts.catal commun 2002; 3:165-171.
- Eze kA, Nwadiogbu JO, Nwankwere ET, et al. Effect of Acid Treatments on the Physicochemical Properties of Kaolin Clay. Archives of Applied Science Research 2012; 4 (2):792-794.
- Huang CC, Li HS, Chen CH. Effect of surface acidic oxides of activated carbon on adsorption of ammonia. Journal of Hazardous Materials 2008; 159:523–527.
- Anbia M, Ghaffari A. Removal of Malachite Green from Dye Wastewater Using Mesoporous Carbon Adsorption. Journal of the Iranian chemical society 2011;8: 567 – 576.
- Ferial A. Adsorption of basic dyes from aqueous solution onto pumice powder. Journal of Colloid Interface Science 2005; 286:455-458
- Jimenez MMD, Gonzalez MPE, Cid AAP. Adsorption interaction between natural adsorbents and textile dyes in aqueous solution, Colloids Surf 2005; 254:107–114.
- Samarghandi MR, Noorisepeher M, Zarabi M, SHahrokhi E, Amraie F. The study of effecincy and mechanism of acid dye black removal using sorbent mineral pumice. Journal of Health and Environment 2009; 3(4):399-410 (In Persian)
- Foo KY, Hameed BH. Insights into the modeling of adsorption isotherm systems. Chemical Engineering Journal 2010; 156:2–10.
- Kitis M, Kaplan S S, Karakaya E, Yigit N O and Civelekoglu G. Adsorption of natural organic Matter (NOM) from waters by iron coted pumice. chemospher66, 2007: 130-138.
- Lagergren, S. Zurtheorie der sogenannten adsorption gel¨osterstoffe, K. Sven. Vetenskapsakad. Handl 1898; 24: 1–39.
- Ho YS, McKay G. Pseudo-second order model for sorption processes, Process. Biochem. 1999; 34: 451–465.
- Eze kA, Nwadiogbu JO, Nwankwere ET, et al. Effect of Acid Treatments on the Physicochemical Properties of Kaolin Clay. Archives of Applied Science Research 2012; 4 (2):792-794.
- Samarghandi MR, Zarrabi M, Noori Sepehr M, Amrane A, Safari GhH, Bashiri S. Application of acidic treated pumice as an adsorbent for the removal of Azo dye from aqueous solutions: kinetic, equilibrium and thermodynamic studies. Iranian Journal of Environmental Health Sciences Engineering 2012; 9(1) 33-44. (In Persian)
- Flessner U, Jones DJ, Rozière J, Zajac J. A study of the surface acidity of acid-treated montmorillonite clay catalysts. Journal of Molecular Catalysis A: Chemical 2001; 168:247–256.
- Ajemba RO. Alteration of Bentonite from Ughelli by Nitric Acid Activation: Kinetics and Physicochemical Properties. Indian Journal of Science and Technology 2013; 6(2):102-109.
- His HC, Rood MJ, Rostam-Abadi M, Chang YM. Effects of Sulfur, Nitric Acid, and Thermal Treatments on the Properties and Mercury Adsorption of Activated Carbons from Bituminous Coals. Aerosol and Air Quality Research 2013; 13: 730–738.
- Ackacha MA, drmoon M. Adsorption of Malachite Green Dye onto Novel Adsorbent: Tamarix Aphylla Leaves. International Conference on Transport, Environment and Civil Engineering (ICTECE'2012) August 25-26, 2012:141-145.
- Huang M, Xu C, Wu Z, Huang Y, Lin J, Wu J. Photocatalytic discoloration of methyl orange solution by Pt Modified TiO2 loaded on natural zeolite, Journal of Dyes and Pigments 2008; 77 (2): 327-334.
- Arivoli S, Hema M, Prasath PMD. Adsorption of Malachite Green onto carbon prepared from Borassus Bark. The Arabian Journal for Science and Engineering 2009; 34(2):31-42.
- Zhang J, Li Y, Zhang C, Jing Y. Adsorption of malachite green from aqueous solution onto carbon prepared from Arundo donax root. Journal of Hazardous Materials 2008; 150: 774-782.
- Hameed BH, El-Khaiary MI. Malachite green adsorption by rattan sawdust: Isotherm, kinetic and mechanism modeling. Journal of Hazardous Materials 2008; 159:574–579.
- Santhi T, Manonmani S, Smitha T. Removal of malachite green from aqueous solution by activated carbon prepared from the Annona squmosa seed by adsorption. Electronic Journal of Chemistry 2010; 2(2):101-117.
- Seey TL, Kassim MJNM. Acidic and Basic Dyes Removal by Adsorption on Chemically Treated Mangrove Barks. International Journal of Applied Science and Technology 2012; 2(3): 270 – 276.
- Zarabi M, Samarghandi MR, Taghavi SJ, SHahrokhi E, Amraie F. Volcanic pumice stones efficacy in treating textile wastewater. 13th National Conference of Environmental Health, Kerman University of Medical Sciences 2009. (In Persian)
- Moracia N, Paolo Calabrò S. Heavy metals removal and hydraulic performance in zero-valent iron/pumice permeable reactive barriers. 2010:91(11): 2336-2341
- Denise A. Fungaro, Lucas C. Groschea, Alessandro S. Pinheirob, Juliana C. Izidoroa, SueliBorrelyAdsorption of methylene blue from aqueous solution on zeolitic material and the improvement as toxicity removal to living organisms. Orbital Elec. J. Chem Campo Grande 2010:2(3): 235-247.
- Srikhut S, Hirunpraditkun S, Nuithitikul K. Adsorption of Malachite Green Dye onto Activated Carbon Derived from Durian Peel. Proceedings of the 7th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment (HTE '09). http://www.che.kmutnb.ac.th
- Panda AK, Mishra BG, Mishra DK, Singh RK. Effect of sulphuric acid treatment on the physico-chemical characteristics of kaolin clay. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2010; 363(1–3): 98–104.
- Akbal F. Adsorption of basic dyes from aqueous solution onto pumice powder. Journal of Colloid Interface Science 2005; 286:455-458.
- Visa M, Bogatu C, Duta A. Simultaneous adsorption of dyes and heavy metals from multicomponent solutions using fly ash. Applied Surface Science 2010:6 (in press).
- Do˘gan M, Alkan M, Türkyilmaz A, ÖzdemirY. Kinetics and mechanism of removal of methylene blue by adsorption onto perlite. Journal of Hazardous Materials 2004: 109: 141–148
- Al-Ghouti M.A Khraisheh MAM, Ahmad MNM, Allen S, Adsorption behaviour of methylene blue onto Jordanian diatomite: a kinetic study, J. Hazard. Mater. 2009; 165: 589–598.
- Uzun A, Kinetics of the adsorption of reactive dyes by chitosan, Dyes.Pigments. 2006:70:76-83.
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- Andre B, Santos D, Francisco J, Jules B, Lier V. Review paper on current technologies for decolourisation of textile wastewater: Perspectivs for anaerobic biotechnology. Bioresour. Technol. 2007; 98:2369-2385.
- Shokoohi R, Dargahi A, Amiri R, Ghavami Z. Evaluation of US/S2O8-2 compilative process performance in the removal of Erythrosine B dye from aqueous solution. Journal of Advances in Environmental Health Research. 2018;1;6(1):1-8.
- Banat F, Al-Ahmad R, Bni –Khalid F. Bench-scale and packed bed sorption of methylene blue using treated olive pomace and. Charcoal Bioresour Technol.2007;98:3017-3025
- Pirsaheb M, Zinatizadeh AA, Dargahi A. Performance Evaluation of Coagulation Process in Removal of Low Turbidity and Color from Water Using Different Inorganic Coagulants. Journal of water and wastewater. 2012;23(1): 111-118. (In Persian)
- Gupta VK, Mittal A, Krishnah L, Gajbe V.Adsorption kinitics and column operations for the removal and recovery of malachite green from wastewater using bottom ash. Sep.Purif Technology 2004; 87-96.
- Zhang J, Li Y, Zhang C, Jing Y. Adsorption of malachite green from aqueous solution onto carbon prepared from Arundo donax root. Journal of Hazardous Materials 2008; 150: 774-782.
- Almasi A, Amirian F, Mohammadi M, Yari A R, Dargahi A, Ahmadidoust G. Evaluation Low Cost Adsorbent of Walnut Bark Granule for Methylene Blue Dye Removal from Aqueous Environments. Arch Hyg Sci. 2018; 7 (2) :112-117.
- Sharma YCU. Removal of Malachite Green from Aqueous Solutions by Adsorption on to Timber Waste. International Journal of Environmental Engineering and Management 2013; 4(6): 631-638. http://www.ripublication.com/ ijeem.htm
- Akbal F, Akdemir N, Onar AN. FT-IR spectroscopic detection of pesticide after sorption on to modified pumice. Talanta 2000; 53:131-135.
- Wesley LD. Determination of specific gravity and void ratio of pumice matrials. Geotech Test J 2001; 24:418-422.
- Kitis M, Kaplan SS, Karakaya E, Yigit NO, Civelekoglu G. Adsorption of natural organic Matter (NOM) from waters by iron coted pumice. Chemospher 2007; 66:130-138.
- Geitgey RP. pumice and volcanic cider In: carr ,D.D.(ED),Industrial Minerals and Rocks.,Society for Mining, Metallurgy,and Exploration . littleeton Co USA PP 1994;803-813.
- Bassari A, Akyuz T, Kurtcebe T. The removal of Th, Cs and Sr ions from solution using granulated pumice stone. J Inclusion phenommol 1996; 26:83-88.
- Njau KN, Minja RJA, Katima J HY. Pumice soil:Apotential wetland substrate for treatment of domestic wastewater. Water Sci Technol 2003; 48:85-92.
- Lale M, Temocim Z, Bag N. Sorption behavior of copper (Ц), zinc (Ц) and nickel (Ц) on formaldehyde cross-linked Saccharomyces cerevisias immobilized on pumice stone. Fresenius Environ Bull 2001; 10:736-740.
- Esmaili A, Nasseri S, Mahvi AH. Adsorption of divalent copper and nickel from aqueous solutions by a natural mineral cartridge (volcanic ash). Journal of Hormozgan University of Medical Sciences 2004:8(1):33-39. (In Persian)
- Wohanka W, Lendtke H, luebke M. optimization of slow filtration as ameans of disinfecting nutrient solution. Acta HORTIC 1999; 481:539-543.
- Farizoglu B, Nuhoglu A, Yildis E, Keskinler B.The performance of pumice as filter bed matrial under rapid filtration condition filter. 2003; 40:41-46.
- Rachel A, Rao KVS, Subrahmanyam M, Boule P. Immobilization of Tio2 on pumice stone for the photocatalyti degradation of dyes and dye industry pollutants. Appl CATAL b Environ 2003; 46:77-85.
- Rachel A, Lavedrine B, Subrahmanyam Boule MP.Use of porous lavas as supports of photocatalysts.catal commun 2002; 3:165-171.
- Eze kA, Nwadiogbu JO, Nwankwere ET, et al. Effect of Acid Treatments on the Physicochemical Properties of Kaolin Clay. Archives of Applied Science Research 2012; 4 (2):792-794.
- Huang CC, Li HS, Chen CH. Effect of surface acidic oxides of activated carbon on adsorption of ammonia. Journal of Hazardous Materials 2008; 159:523–527.
- Anbia M, Ghaffari A. Removal of Malachite Green from Dye Wastewater Using Mesoporous Carbon Adsorption. Journal of the Iranian chemical society 2011;8: 567 – 576.
- Ferial A. Adsorption of basic dyes from aqueous solution onto pumice powder. Journal of Colloid Interface Science 2005; 286:455-458
- Jimenez MMD, Gonzalez MPE, Cid AAP. Adsorption interaction between natural adsorbents and textile dyes in aqueous solution, Colloids Surf 2005; 254:107–114.
- Samarghandi MR, Noorisepeher M, Zarabi M, SHahrokhi E, Amraie F. The study of effecincy and mechanism of acid dye black removal using sorbent mineral pumice. Journal of Health and Environment 2009; 3(4):399-410 (In Persian)
- Foo KY, Hameed BH. Insights into the modeling of adsorption isotherm systems. Chemical Engineering Journal 2010; 156:2–10.
- Kitis M, Kaplan S S, Karakaya E, Yigit N O and Civelekoglu G. Adsorption of natural organic Matter (NOM) from waters by iron coted pumice. chemospher66, 2007: 130-138.
- Lagergren, S. Zurtheorie der sogenannten adsorption gel¨osterstoffe, K. Sven. Vetenskapsakad. Handl 1898; 24: 1–39.
- Ho YS, McKay G. Pseudo-second order model for sorption processes, Process. Biochem. 1999; 34: 451–465.
- Eze kA, Nwadiogbu JO, Nwankwere ET, et al. Effect of Acid Treatments on the Physicochemical Properties of Kaolin Clay. Archives of Applied Science Research 2012; 4 (2):792-794.
- Samarghandi MR, Zarrabi M, Noori Sepehr M, Amrane A, Safari GhH, Bashiri S. Application of acidic treated pumice as an adsorbent for the removal of Azo dye from aqueous solutions: kinetic, equilibrium and thermodynamic studies. Iranian Journal of Environmental Health Sciences Engineering 2012; 9(1) 33-44. (In Persian)
- Flessner U, Jones DJ, Rozière J, Zajac J. A study of the surface acidity of acid-treated montmorillonite clay catalysts. Journal of Molecular Catalysis A: Chemical 2001; 168:247–256.
- Ajemba RO. Alteration of Bentonite from Ughelli by Nitric Acid Activation: Kinetics and Physicochemical Properties. Indian Journal of Science and Technology 2013; 6(2):102-109.
- His HC, Rood MJ, Rostam-Abadi M, Chang YM. Effects of Sulfur, Nitric Acid, and Thermal Treatments on the Properties and Mercury Adsorption of Activated Carbons from Bituminous Coals. Aerosol and Air Quality Research 2013; 13: 730–738.
- Ackacha MA, drmoon M. Adsorption of Malachite Green Dye onto Novel Adsorbent: Tamarix Aphylla Leaves. International Conference on Transport, Environment and Civil Engineering (ICTECE'2012) August 25-26, 2012:141-145.
- Huang M, Xu C, Wu Z, Huang Y, Lin J, Wu J. Photocatalytic discoloration of methyl orange solution by Pt Modified TiO2 loaded on natural zeolite, Journal of Dyes and Pigments 2008; 77 (2): 327-334.
- Arivoli S, Hema M, Prasath PMD. Adsorption of Malachite Green onto carbon prepared from Borassus Bark. The Arabian Journal for Science and Engineering 2009; 34(2):31-42.
- Zhang J, Li Y, Zhang C, Jing Y. Adsorption of malachite green from aqueous solution onto carbon prepared from Arundo donax root. Journal of Hazardous Materials 2008; 150: 774-782.
- Hameed BH, El-Khaiary MI. Malachite green adsorption by rattan sawdust: Isotherm, kinetic and mechanism modeling. Journal of Hazardous Materials 2008; 159:574–579.
- Santhi T, Manonmani S, Smitha T. Removal of malachite green from aqueous solution by activated carbon prepared from the Annona squmosa seed by adsorption. Electronic Journal of Chemistry 2010; 2(2):101-117.
- Seey TL, Kassim MJNM. Acidic and Basic Dyes Removal by Adsorption on Chemically Treated Mangrove Barks. International Journal of Applied Science and Technology 2012; 2(3): 270 – 276.
- Zarabi M, Samarghandi MR, Taghavi SJ, SHahrokhi E, Amraie F. Volcanic pumice stones efficacy in treating textile wastewater. 13th National Conference of Environmental Health, Kerman University of Medical Sciences 2009. (In Persian)
- Moracia N, Paolo Calabrò S. Heavy metals removal and hydraulic performance in zero-valent iron/pumice permeable reactive barriers. 2010:91(11): 2336-2341
- Denise A. Fungaro, Lucas C. Groschea, Alessandro S. Pinheirob, Juliana C. Izidoroa, SueliBorrelyAdsorption of methylene blue from aqueous solution on zeolitic material and the improvement as toxicity removal to living organisms. Orbital Elec. J. Chem Campo Grande 2010:2(3): 235-247.
- Srikhut S, Hirunpraditkun S, Nuithitikul K. Adsorption of Malachite Green Dye onto Activated Carbon Derived from Durian Peel. Proceedings of the 7th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment (HTE '09). http://www.che.kmutnb.ac.th
- Panda AK, Mishra BG, Mishra DK, Singh RK. Effect of sulphuric acid treatment on the physico-chemical characteristics of kaolin clay. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2010; 363(1–3): 98–104.
- Akbal F. Adsorption of basic dyes from aqueous solution onto pumice powder. Journal of Colloid Interface Science 2005; 286:455-458.
- Visa M, Bogatu C, Duta A. Simultaneous adsorption of dyes and heavy metals from multicomponent solutions using fly ash. Applied Surface Science 2010:6 (in press).
- Do˘gan M, Alkan M, Türkyilmaz A, ÖzdemirY. Kinetics and mechanism of removal of methylene blue by adsorption onto perlite. Journal of Hazardous Materials 2004: 109: 141–148
- Al-Ghouti M.A Khraisheh MAM, Ahmad MNM, Allen S, Adsorption behaviour of methylene blue onto Jordanian diatomite: a kinetic study, J. Hazard. Mater. 2009; 165: 589–598.
- Uzun A, Kinetics of the adsorption of reactive dyes by chitosan, Dyes.Pigments. 2006:70:76-83.