Document Type : Research Article

Authors

Yasouj University

Abstract

Introduction: Cadmium is one of the toxic heavy metals which is highly problematic in today's industrial world. It is essential to study the techniques for removing or reducing its availability, toxicity and consequently its hazardous effects in environment. Biochar is an amendment reported to be efficient in fixing heavy metals. Pyrolysis temperature is among the most important factors affecting biochar's characteristics, such as pH, CEC and specific surface area and generally it's potential to sorb heavy metals. On the other hand, soil moisture regime could affect pH and EC and consequently the Cd availability. Iran is the second producer of pistachio in the world and consequently a large volume of pistachio waste byproducts would be created annually. Converting this byproduct to biochar may be an efficient tool to prevent its accumulation. On the other hand, the produced biochar could be used as a soil amendment. The present study was conducted to evaluate biochar produced from pistachio nutshell under different temperatures for reducing Cd availability under different moisture regimes.
Materials and Methods: The soil texture in the present study was sandy-loam. Raw pistachio nutshell (RPN) was used to produce biochar under different temperatures. RPN was rapped in aluminum foils and heated for 2 h in a muffle furnace under 200, 400 and 600 °C. The pH, EC and concentrations of P, K, Fe, Mn, Zn and Cu of RPN and produced biochars were determined. A completely randomized experimental design with factorial arrangement including nine biochar treatments (control (no amendment), RPN and biochars produced under 200, 400 and 600 °C at 2% and 4% rates), and two moisture regims (20% w/w and waterlogging) was carried out with two replications. The samples were spiked with 25 and 50 mg Cd kg-1 and incubated for 90 days under laboratory temperature. Available Cd extracted by DTPA-TEA on 15, 30, 60 and 90 days after incubation. Cadmium concentration determined by Atomic Absorption Spectrometry (Mark and Model: HITACHI- ZCAST 2300). Analysis of variance and compare of means used to evaluate the effects of various treatments on DTPA-Cd.
Results and Discussion: The nutrient concentrations of biochar were increased with increasing the production temperature. The RPN and biochar of 200 ºC had the least nutrient concentrations while the biochar of 600 ºC showed the highest nutrient concentrations. The increases of pH and EC occurred with increasing the biochar production temperature. The pH ranged from 6.36 to 9.36 and EC range was 13.5-31.9 dS m-1. The analysis of variance showed that biochar, moisture regime and their interaction significantly affected DTPA-Cd on all of the studied times (P< 0.01) in both Cd levels. The cadmium availability was reduced by incubation times in all of the treatments and 600°C biochar caused the highest decrease of DTPA-Cd. In 25 mg Cd kg-1 level, the application of 600°C biochar caused significant decrease of DTPA-Cd by 54.2, 73, 53.5 and 60.5 % in comparison with control on 15, 30, 60 and 90 d, respectively. In 50 mg Cd kg-1 level, 600°C biochar in 4% w/w and 20% w/w moisture contents reduced DTPA Cd by 38.6, 43.4, 39.8 and 45.7 mg kg-1 on 15, 30, 60 and 90 d, respectively. The DTPA-Cd was reduced by increasing the biochar application rate to 4% w/w, but only for biochar of 600°C, this reduction had a significant difference with 2% application rate. Four percent biochar application rate on waterlogging condition reduced DTPA-Cd by 60.1%, 34.1 % and 53.6 % compared with 2% application rate on 30, 60 and 90 d, respectively. These changes on 50 mg Cd kg-1 in 20 % moisture level were 36.8, 43.8, 37.7 and 35.2 % on 15, 30, 60 and 90d, respectively. In 20% moisture level, the application of 600 °C biochar reduced DTPA-Cd compared with waterlogging while raw pistachio nuts and 200 and 400 °C biochars showed a reverse trend and increased DTPA-Cd in 20% moisture level compared with waterlogging.
Conclusion: Generally, regarding the decrease of DTPA-Cd by biochars, especially biochar of 600 °C, it can be concluded that biochar of pistachio nut shell particularly under 600 °C might be considered as an inexpensive and green environmental sorbent for Cd, however its potential to reduce Cd uptake by plants and Cd movement in environment requires further studies. Furthermore, the knowledge of the mechanisms that are responsible for Cd retention on biochar and desorption kinetic of sorbed Cd need further investigation.

Keywords

1. Adriano D.C. 2001. Trace elements in terrestrial environments biogeochemistry, bioavailability, and risks of metals, 2nd ed. New York: Springer. 879 pp.
2. Adriano D.C., Wenzel W.W., Vangronsveld J., Bolan N.S. 2004. Role of assisted natural remediation in environmental cleanup, Geoderma, 122: 121-142.
3. Allison L. E. and Moodie C. D. 1965. Carbonate. In: C. A. Black ed.). Methods of Soil Analysis. part 2. American Society of Agronomy. Madison, WI. 1379-1396.
4. Bagreev, A., Bandosz T.J., Locke D.C. 2001. Pore structure and surface chemistry of adsorbents obtained by pyrolysis of sewage sludge-derived fertilizer, Carbon, 39: 1971-1979.
5. Beesley, L., and Marmiroli M. 2011. The immobilisation and retention of soluble arsenic, cadmium and zinc by biochar, Environmental Pollution, 159: 474-480.
6. Bian, R., Joseph S., Cui L., Pan G., Li L., Liu X., and Donne S. 2014. A three-year experiment confirms continuous immobilization of cadmium and lead in contaminated paddy field with biochar amendment, Journal of hazardous materials, 272: 121-128.
7. Bolan N.S., Adriano D. C., Duraisamy P., Mani A., Arulmozhiselvan K. 2003. Immobilization and availability of cadmium in variable charge soils. I. Effect of phosphorus addition, Plant and Soil, 250: 83–94.
8. Bower C.A., Reitemeier R.F., and Fireman M. 1952. Exchangeable cation analysis of saline and alkali soils, Soil Science, 73: 251-261.
9. Chapman H. D., and Pratt D. F. 1961. Methods of Analysis for Soil, Plant, and Water. University of California, Division Agriculture, Soil Science. PP. 60-62.
10. Chen B.L., Zhou D.D., Zhu L.Z. 2008. Transitional adsorption and partition of nonpolar and polar aromatic contaminants by biochars of pine needles with different pyrolytic temperatures, Environmental Science and Technology, 42: 5137-5143.
11. Chen T., Zhang Y., Wang H., Lu W., Zhou Z., Zhang Y., and Ren L. 2014. Influence of pyrolysis temperature on characteristics and heavy metal adsorptive performance of biochar derived from municipal sewage sludge, Bioresource Technology: 164, 47-54.
12. Chen Y., Xie T., Liang Q., Liu M., Zhao M., Wang M., Wang G. 2016. Effectiveness of lime and peat applications on cadmium availability in a paddy soil under various moisture regimes, Environmental Science and Pollution Research, 23: 7757-7766.
13. Chen, H. M., Zheng C. R., Tu C., and Shen Z. G. 2000. Chemical methods and phytoremediation of soil contaminated with heavy metals, Chemosphere, 41: 229-234.
14. Chuan, M. C., Shu G. Y., and Liu J. C. 1996. Solubility of heavy metals in a contaminated soil: effects of redox potential and pH, Water, Air, and Soil Pollution. 90: 543-556.
15. Cui L., Li L., Zhang A., Pan G., Bao D., and Chang A. 2011. Biochar amendment greatly reduces rice Cd uptake in a contaminated paddy soil: a two-year field experiment, Bioresources, 6: 2605-2618.
16. Dabrowski. A. 2004. Selective removal of the heavy metal ions from waters and industrial waste waters by ion-exchange method, Chemosphere, 56: 91-106.
17. De Filippis, P., Palma L.D., Petrucci E., Scarsella M., Verdone N, 2013. Production and characterization of adsorbent materials from sewage sludge by Pyrolysis, Chemical Engineering Transactions, 32: 205-210.
18. Dong D., Yang M., Wang C., Wang H., Li Y., Luo J., Wu W. 2013. Responses of methane emissions and rice yield to applications of biochar and straw in a paddy field, Journal of Soils and Sediments, 8: 1450–1460.
19. Fellet G., Marchiol L., Delle Vedove G., and Peressotti A. 2011. Application of biochar on mine tailings: effects and perspectives for land reclamation, Chemosphere, 83(9), 1262-1267.
20. Freitas J. C. C., Cunha A. G., and Emmerich F. G. 1997. Physical and chemical properties of a Brazilian peat char as a function of HTT, Fuel, 76: 229–232.
21. Gee G. W. and Bauder J. W. 1986. Particle- size analysis. In: A. Klute (ed.). Methods of soil analysis, Part 1. Physical and Mineralogical Methods. American Society of Agronomy. Soil Science Society of America. Madison, WI.
22. Gundale, M. J., and DeLuca T. H. 2006. Temperature and substrate influence the chemical properties of charcoal in the ponderosa pine/Douglas-fir ecosystem, Forest Ecology and Management, 231: 86–93.
23. Khalid R.A., Gambrell R.P., and Patrick W.H. 1981. Chemical availability of cadmium in Mississippi River sediment, Journal of Environmental Quality, 10: 523-528.
24. Klasson K. T., Boihem Jr., Uchimiya M., Lima I. M. 2014. Influence of biochar pyrolysis temperature and post-treatment on uptake of mercury from flue gas, Fuel Processing Technology, 123: 27-33.
25. Kookana, R. S. 2010. The Role of Biochars in modifying the environmental fate, bioavailability, and efficacy of Pesticides in Soil: A Review, Soil Research, 48: 627-637.
26. Lehmann J. 2007. Bio-energy in the black, Frontiers in Ecology and the Environment, 5: 381-387.
27. Lehmann J., Joseph S. 2009. Biochar for environmental management, Science and Technology, Earthscan Ltd., London, UK.
28. Leonidas L. C., Leonidou C. N., Fotiadis T. A., Zeriti A. 2013. Resources and capabilities as drivers of hotel environmental marketing strategy: Implications for competitive advantage and performance, Tourism Management, 35: 94-110
29. Lindsay W.L. and Norwell W.A. 1978. Development of a DTPA soil test for zinc, iron, manganese, copper, Soil Science Society of America Journal, 42: 421-428.
30. Loganathan P., Vigneswaran S., Kandasamy J., and Naidu R. 2012. Cadmium sorption and desorption in soils: a review, Critical Reviews in Environmental Science and Technology, 42: 489-533.
31. Lua A. C., Yang T., and Guo J. 2004. Effects of pyrolysis conditions on the properties of activated carbons prepared from pistachio-nut shells, Journal of Analytical and Applied Pyrolysis, 72: 279–287.
32. McBride M. B. 1994. Environmental chemistry of soils, Oxford Univ. Press. New York.
33. Mendez A., Gomez A., Paz-Ferreiro J., Gasco G. 2012. Effects of sewage sludge biochar on plant metal availability after application to a Mediterranean soil, Chemosphere, 89: 1354–1359.
34. Misra A. K., Sarkunan V., Das M., and Nayar P. K. 1990. Transformation of added heavy metals in soils under flooded condition, Journal of the Indian Society of Soil Science, 38:416-418.
35. Namgay T., Singh B., and Singh B. P. 2010. Influence of biochar application to soil on the availability of As, Cd, Cu, Pb, and Zn to maize (Zea mays L.), Soil Research, 48: 638- 647.
36. Nelson D. W and Sommers L. E. 1996. Total carbon, organic carbon and organic matter. In: D. L. Sparks (e.d.). Method of soil analysis, Part 3. American Society Agronomy., Madison, WI.
37. Raicevi S., Kaludjerovic-Radoicic T., and Zouboulis A. I. 2005. In situ stabilization of toxic metals in polluted soils using phosphates: theoretical prediction and experimental verification, Journal of Hazardous Materials, 117: 41-53.
38. Silveira M. L. A., Alleoni L. R. F., and Guilherme L. R. G. 2003. Biosolids and heavy metals in soils, Scientia Agricol, 60: 793-806.
39. Song W., and Guo M. 2012. Quality variations of poultry litter biochar generated at different pyrolysis temperature, Journal of Analytical and Applied Pyrolysis, 94: 138- 145.
40. Uchimiya M., Klasson K.T., Wartelle L.H., Lima I. M. 2011. Influence of soil properties on heavy metal sequestration by biochar amendments: 1. Copper sorption isotherms and the release of cations, Chemosphere, 82: 1431-1437.
41. Wu L., Li Z., Akahane I., Liu L., Han C., Makino T., Luo Y., Christie P. 2012. Effects of organic amendments on Cd, Zn and Cu bioavailability in soil with repeated phytoremediation by Sedum plumbizincicola, International Journal of Phytoremediation, 14: 1024–1038.
42. Xiong L. M., Lu R. K. 1993. Effect of liming on plant accumulation of cadmium under upland or flooded conditions, Environmental Pollution, 79: 199-203.
43. Yu X.Y., Ying G.G., Kookana R.S. 2006. Sorption and desorption behaviors of diuron in soils amended with charcoal, Journal of Agricultural and Food Chemistry, 54: 8545-8550.
44. Yuan, J., Xu, R., Zhang, H. 2011. The forms of alkalis in the biochar produced from crop residues at different temperatures, Bioresource Technology, 102: 3488–3497
45. Zhang H., Lin K., Wang H., Gan J. 2010. Effect of Pinus radiata derived biochars on soil sorption and desorption of phenanthrene, Environmental Pollution, 158: 2821–2825.
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