بررسی کارایی زغال زیستی اصلاح شده با منیزیم کلرید در حذف نیترات از محلول آبی: مطالعه سینتیک و همدمای جذب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته دکتری علوم خاک، گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید چمران اهواز

2 دانشگاه شهید چمران اهواز، دانشکده کشاورزی، گروه علوم و مهندسی خاک

3 ستادیار گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید چمران اهواز

4 استادیار گروه شیمی، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز، ایران

چکیده

چکیده
اصلاح زغال زیستی با هدف بهبود ساختار منافذ، افزایش سطح ویژه، گروه­های عاملی و کاهش محدودیت زغال زیستی اولیه در جذب آلاینده­ها صورت می­گیرد. این پژوهش نیز به منظور بررسی کارایی زغال زیستی ذرت اصلاح شده در جذب نیترات از محلول آبی انجام شد. بدین منظور زغال‌های زیستی از بقایای ذرت و بقایای ذرت اصلاح شده با منیزیم کلرید (MgCl2) در دمای 500 درجه سلسیوس تهیه شدند و ویژگی­های شیمیایی و فیزیکی آن­ها اندازه­گیری شد.آزمایش­های جذب سطحی به‌صورت پیمانه­ای انجام شد و تأثیر عوامل مؤثر بر فرآیند جذب نیترات توسط  زغال‌های زیستی شامل غلظت اولیه، زمان تماس و pH بررسی شد. بررسی ویژگی­های دو نوع زغال زیستی نشان داد، با اصلاح شیمیایی زغال زیستی عملکرد، pH، سطح ویژه، ظرفیت تبادل کاتیونی، ظرفیت تبادل آنیونی، محتوای اکسیژن، نسبت H/C و O/C افزایش یافت، در حالی که محتوای کربن و نسبت C/N کاهش یافت. نتایج جذب نیترات نشان داد فرآیند جذب در هر دو زغال زیستی پس از گذشت 480 دقیقه به تعادل رسید. مقدار pH بهینه در حذف نیترات سه بود. نتایج نشان داد که اصلاح شیمیایی زغال زیستی سبب افزایش ظرفیت جذب نیترات شده و حداکثر جذب نیترات به وسیله زغال زیستی تهیه شده از بقایای ذرت و زغال زیستی اصلاح شده به ترتیب 72/51 و 18/72 میلی­گرم بر گرم برآورد شد. مدل لانگ­مویر بهترین برازش را برای داده­های هر دو نوع زغال زیستی نشان داد. همچنین فرآیند جذب نیترات با مدل سینتیکی شبه مرتبه دوم قابل توصیف بود. به­طور کلی نتایج این پژوهش نشان داد اصلاح زغال زیستی ذرت با MgCl2می­تواند سبب بهبود ویژگی­های فیزیکی و شیمیایی و افزایش ظرفیت جذب نیترات از محلول­های آبی گردد. بنابراین زغال زیستی ذرت اصلاح شده با MgCl2، می­تواند جاذب مناسبی برای پالایش منابع آبی آلوده به آلاینده­های معدنی از جمله نیترات باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of Modified Biochar Performance on Nitrate Removal from Aqueous Solution: Kinetic and Isotherm Study

نویسندگان [English]

  • Shila Khajavi-Shojaei 1
  • abdolamir moezzi 2
  • Mojtaba Norouzi Masir 3
  • Mehdi Taghavi 4
1 Geaduated Ph.D Student of Soil Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz
2 shahid chamran university of ahvaz, faculty of agriculture, department of soil science
3 Assistant Professor, Department of Soil Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
4 Assistant Professor, Department of Chemistry, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

Abstract
Biochar modification is performed to improve the structure of pores, increase the specific surface area, functional groups, and reduction of raw biochar limits in absorption of pollutants. This study was conducted to evaluate the efficiency of corn stover modified biochar in adsorption of nitrate from aqueous solution. For this purpose, corn stover biochar (BC) and chemically modified corn stover biochar with MgCl2 (Mg-BC) was prepared at 500°C and its physico-chemical characteristics were measured. Adsorption batch experiments were carried. Effects of initial concentration of nitrate, contact time and pH on adsorption capacity mechanism were studied. The study of the characteristics of the two types of biochar showed that by the chemical modification of corn stover, enhanced yields, pH, surface area, cation exchange capacity and anion exchange capacity, oxygen content, H/C and O/C ratio, while decreased carbon content and C/N ratio. Adsorption of nitrate by both biochar reached to equilibrium after 480. The optimal pH for removal of nitrate was 3. The results demonstrated that chemical modification of biochar enhanced nitrate adsorption and maximum nitrate adoption by BC and Mg-BC was 51.72 and 72.18, respectively. Langmuir isotherm showed the best fit for nitrate in both biochars. The pseudo second order kinetic model also provided a good description for the adsorption process nitrate.Generally, result of present study revealed that modification of biochar could improve physico-chemical and adsorption capacity of nitrate from aqueous solution. Therefore, MgCl2 modified biochar could be a suitable absorbent for purifying water resources which contaminated by inorganic pollutants, including nitrate.

کلیدواژه‌ها [English]

  • Adsorption
  • Agricultural waste
  • Chemical modification
  • Organic adsorbents
References
Ahmad M., Lee S.S., Rajapaksha A.U., Vithanage M., Zhang M., Cho J.S., Lee S.E. and Ok, Y.S. 2013. Trichloroethylene adsorption by pine needle biochars produced at various pyrolysis temperatures. Bioresource Technology, 143: 615-622.
Ahmed M.B., Zhou J.L., Ngo H.H., Guo W., and Chen M. 2016. Progress in the preparation and application of modified biochar for improved contaminant removal from water and wastewater. Bioresource Technology,214: 836-851.
APHA, AWWA, WEF. 1992. Standard Methods for the Examination of Water and Wastewater. American Public Health Association.
Azargohar R., and Dalai A.K. 2008. Steam and KOH activation of biochar: experimental and modeling studies. Microporous and Mesoporous Materials, 110 (2–3):413–421.
Chintala R., Mollinedo J., Schumacher T.E., Papiernik S.K., Malo D.D., Clay D.E., Kumar S., and Gulbrandson D.W. 2013. Nitrate sorption and desorption in biochars from fast pyrolysis. Microporous and Mesoporous Materials, 179: 250-257.
Cui X., Dai X., Khan K.Y., Li T., Yang X., and He Z. 2016. Removal of phosphate from aqueous solution using magnesium-alginate/chitosan modified biochar microspheres derived from Thalia dealbata. Bioresource Technology, 218: 1123-1132.
Dolas H., Sahin O., Saka C., and Demir H. 2011. A new method on producing high surface area activated carbon: the effect of salt on the surface area and the pore size distribution of activated carbon prepared from pistachio shell. Chemical Engendering Journal, 166(1): 191–197.
Domingues R.R., Trugilho P.F., Silva C.A., de Melo, I.C.N., Melo L.C., Magriotis Z.M., and Sánchez-Monedero M.A. 2017. Properties of biochar derived from wood and high-nutrient biomasses with the aim of agronomic and environmental benefits. PloS One, 12(5): 0176884.
Fang C., Zhang T., Li P., Jiang R.F., and Wang Y.C. 2014. Application of magnesium modified corn biochar for phosphorus removal and recovery from swine wastewater. International Journal of Environmental Research and Public Health,11(9): 9217-9237.
Fidel R.B., Laird D.A., and Spokas K.A. 2018. Sorption of ammonium and nitrate to biochars is electrostatic and pH-dependent. Scientific Reports, 8(1): 17627.
Giles C. H., MacEwan T. H., Nakhwa S. N. and Smith D. 1960. Studies in adsorption. Part XI. A system of classification of solution adsorption isotherms, and its use in diagnosis of adsorption mechanisms and in measurement of specific surface areas of solids. Journal of the Chemical Society (Resumed), 3973-3993.
Gong Y.P., Ni Z.Y., Xiong Z.Z., Cheng L.H., and Xu X.H. 2017. Phosphate and ammonium adsorption of the modified biochar based on Phragmites australis after phytoremediation. Environmental Science and Pollution Research, 24(9): 8326-8335.
Hou J., Huang L., Yang Z., Zhao Y., Deng C., Chen Y., and Li X. 2016. Adsorption of ammonium on biochar prepared from giant reed. Environmental Science and Pollution Research, 23(19): 19107-19115.
Karimi A., Moezzi A., Chorom M. and Enayatizamir N. 2019a. Investigation of physicochemical characteristics of biochars derived from corn residue and sugarcane bagasse in different pyrolysis temperatures. Iranian Journal of Soil and Water Research, 50(3): 725-739. (In Persian)
Karimi, A., Moezzi, A., Chorom M. and Enayatizamir N. 2019b. Chemical fractions and availability of Zn in a calcareous soil in response to biochar amendments. Journal of Soil Science and Plant Nutrition, 19(4): 851-864.
Karimi A., Moezzi A., Chorom M., and Enayatizamir, N. 2020. Application of biochar changed the status of nutrients and biological activity in a calcareous soil. Journal of Soil Science and Plant Nutrition, 20(2): 540-549.
Khajavi-Shojaei S., Moezzi A., Norouzi Masir M. and Taghavi zahedkolaei M. 2019. Study of kinetic and Isotherm for ammonium and nitrate adsorption by common reed (Phragmites australis) biochar from aqueous solution, Iranian Journal of Soil and Water Research. 50(8): 2009-2021. (In Persian)
Khajavi-Shojaei S., Moezzi A., Norouzi Masir M. and Taghavi M. 2020. Characteristics of conocarpus wastes and common reed biochars as a predictor of potential environmental and agronomic applications. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. doi: 10.1080/15567036.2020.1783396.
Khanmohammadi Z., Afyuni M. and Mosaddeghi M. 2016. Effect of pyrolysis temperature on chemical properties of Sugarcane bagasse and Pistachio residues biochar. Applied Soil Research, 3(1), 1-13. (In Persian)
Kim J.W., Sohn M.H., Kim D.S., Sohn S.M., and Kwon Y.S. 2001. Production of granular activated carbon from waste walnut shell and its adsorption characteristics for Cu2+ ion. Journal of Hazardous Material, B85: 301–315.
Lawrinenko M., Jing D., Banik C., and Laird D.A. 2017. Aluminum and iron biomass pretreatment impacts on biochar anion exchange capacity. Carbon, 118: 422-430.
Lehmann J. and Joseph S. 2009. Biochar for Environmental Management: Science and Technology, Earthscan/James & James, London, UK, 450p.
Li G., Zhu W., Zhang C., Zhang S., Liu L., Zhu L., and Zhao W. 2016. Effect of a magnetic field on the adsorptive removal of methylene blue onto wheat straw biochar. Bioresource Technology, 206: 16-22.
Liu W., Jiang H., Tian K., Ding Y., and Yu H. 2013. Mesoporous carbon stabilized MgO nanoparticles synthesized by pyrolysis of MgCl2 preloaded waste biomass for highly efficient CO2 capture. Environmental Science and Technology, 47: 9397-9403.
Marzi M., Farahbakhsh M., and Kheial S. 2016. Kinetics and Isotherm of Nitrate Sorption from Aqueous Solution Using Biochar. Water and Soil Science, 26(1-1):145-158. (In Persian)
Moradi N. and Karimi A. 2020. Effect of corn stovermodified biochar on some biological properties of a Cd-contaminated calcareous soil. Journal of Soil Management and Sustainable Production, 9(4): 127-144. (In Persian)
Mukherjee A., and Zimmerman A.R., Harris W. 2011. Surface chemistry variations among a series of laboratory-produced biochars. Geoderma, 163(3-4): 247-255.
Plazinski W., Rudzinski W., and Plazinska, A. 2009. Theoretical models of sorption kinetics including a surface reaction mechanism: a review. Advances in Colloid and Interface Science, 152(1-2): 2-13.
Singh B., Camps-Arbestain M. and Lehmann J. 2017. Biochar: A Guide to Analytical Methods. Csiro Publishing, 320p.
Tang Y., Alam M.S., Konhauser K.O., Alessi D.S., Xu S., Tian W., and Liu Y. 2019. Influence of pyrolysis temperature on production of digested sludge biochar and its application for ammonium removal from municipal wastewater. Journal of Cleaner Production, 209: 927-936.
Usman A.R., Ahmad M., El-Mahrouky M., Al-Omran A., Ok Y.S., Sallam A.S., El-Naggar H., and Al-Wabel, M.I. 2016. Chemically modified biochar produced from conocarpus waste increases NO-3 removal from aqueous solutions. Environmental Geochemistry and Health, 38(2), 511-521.
Volkmer B.G., Ernst B., Simon J., Kuefer R., Bartsch Jr., Bach D., and Gschwend J.E. 2005. Influence of nitrate levels in drinking water on urological malignancies: a community-based cohort study. BJU International, 95 (7): 972–976.
Vu T.M., Doan D.P., Van H.T., Nguyen T.V., Vigneswaran S. and Ngo, H. H. 2017. Removing ammonium from water using modified corncob-biochar. Science of the Total Environment, 579: 612-619.
Wang Z., Guo H., Shen F., Yang G., Zhang Y., Zeng Y., Wang L., Xiao H., and Deng S. 2015. Biochar produced from oak sawdust by Lanthanum (La)-involved pyrolysis for adsorption of ammonium (NH4+), nitrate (NO3−), and phosphate (PO43−). Chemosphere, 119: 646-653.
Williams P.T., and Reed A.R. 2004. High grade activated carbon matting derived from the chemical activation and pyrolysis of natural fibre textile waste. Journal of Analytical and Applied Pyrolysis, 71(2): 971-986.
Wu Z., Xu F., Yang C., Su X., Guo F., Xu Q., Peng G., He Q., and Chen Y. 2018. Highly efficient nitrate removal in a heterotrophic denitrification system amended with redox-active biochar: a molecular and electrochemical mechanism. Bioresource Technology, 275: 297-306.
Yin Q., Wang R., and Zhao Z. 2018. Application of Mg–Al-modified biochar for simultaneous removal of ammonium, nitrate, and phosphate from eutrophic water. Journal of Cleaner Production, 176: 230-240.
Zhan T., Zhang Y., Yang Q., Deng H., Xu J., and Hou W. 2016. Ultrathin layered double hydroxide nanosheets prepared from a water-in-ionic liquid surfactant-free microemulsion for phosphate removal from aquatic systems. Chemical Engineering Journal, 302: 459-465.
Zhang J., Liu J., and Liu R. 2015. Effects of pyrolysis temperature and heating time on biochar obtained from the pyrolysis of straw and lignosulfonate. Bioresource Technology, 176: 288-291.
Zhang M., Gao B., Yao Y., Xue Y., and Inyang M. 2012. Synthesis of porous MgO-biochar nanocomposites for removal of phosphate and nitrate from aqueous solutions. Chemical Engineering Journal, 210: 26-32.