Search Results

1 - 10 of 13 items :

  • "water remediation" x
Clear All
Advantages and risk related with carbon nanomaterials (CNMs) application for water remediation. Mini review

Advantages and risk related with carbon nanomaterials (CNMs) application for water remediation. Mini review

Water is one of the most valuable substances in the world and its availability in the form of potable and drinking water is of great importance for any society. Conventional water treatment methods have been reported to be ineffective in removing some kinds of organic pollutants including endocrine disrupting chemicals (EDCs), personal care products (PCP), pharmaceuticals, etc. Nanotechnology - especially application of the carbon based nanomaterials (CNMs) to water decontamination - is promising technology. The physico-chemical properties of CNMs (e.g. high surface area to volume ratio, high equilibrium rate) make them an excellent adsorbent which can be effectively used to remove pollutants from water. The present mini-review provides an overview of the research progress about organic chemical adsorption on CNMs in relation to water decontamination. The paper also discussed the possible risk related with desorption pharmaceuticals from CNMs.

Open access
Monitoring of organophosphorus pesticides and remediation technologies of the frequently detected compound (chlorpyrifos) in drinking water

Abstract

Studies on the currently used organophosphorus insecticides with respect to their environmental levels and effective remediation technologies for their residues in water have been considered as a source of major concern. This study was carried out to monitor the presence of organophosphorus in drinking water plants (Kafr-El-Shiekh, Ebshan, Elhamoul, Mehalt Aboali, Fowa, Balteem and Metobess) in Kafr-El-Shiekh Governorate, Egypt. Furthermore, it was carried out to evaluate the efficiency of different remediation technologies (advanced oxidation processes and bioremediation) for removing chlorpyrifos in drinking water. The results showed the presence of several organophosphorus pesticides in water sampling sites. Chlorpyrifos was detected with high frequency relative to other compounds in drinking water. Nano photo-Fenton like reagent (Fe2O3(nano)/H2O2/UV) was the most effective treatment for chlorpyrifos removal in drinking water followed by ZnO(nano)/H2O2/UV, Fe3+/H2O2/UV and ZnO/H2O2/ UV, respectively. Bioremediation of chlorpyrifos by effective microorganisms (EMs) removed 100% of the chlorpyrifos initial concentration after 23 days of treatment. There is no remaining toxicity in chlorpyrifos contaminated-water after remediation on treated rats with respect to cholinesterase activity and histological changes in kidney and liver relative to control. Advanced oxidation processes especially with nanomaterials and bioremediation with effective microorganisms can be regarded as safe and effective remediation technologies for chlorpyrifos in drinking water.

Open access
Iron(II) modified natural zeolites for hexavalent chromium removal from contaminated water

Abstract

Three different types of Fe(II)-modified natural zeolites were tested as supports in continuous-flow columns for the treatment of Cr(VI) contaminated water. The natural zeolites chosen as support were commercially available Zeosand (80% clinoptilolite), ATZ (79% phillipsite/chabazite), and ZS-55RW (90% Chabazite). All the examined modified zeolites turned out active for hexavalent chromium abatement, lowering its concentration below the European regulation level, even at relatively high flow rates (40 mL/h, linear velocity 15 cm/h). Zeosand, having a broader pH range of stability, was found to be the best one in terms of both Fe(II) uptake (0.54 wt%) and Cr removal (90 mg Cr/Kg zeolite).

Open access
The impact of various cations on the sorption of manganese in the thallus of freshwater algae spirogyra sp. and sea algae palmaria palmata

Abstract

Due to their occurrence in very different conditions and high resistance to physical and chemical factors, algae are pioneers colonising new environments and their sorption properties are used in biomonitoring and water remediation. The efficiency of the process of heavy metal sorption in algae used for in situ tests depends on abiotic factors, such as the chemical composition of water. Freshwater algae Spirogyra sp. were used in tests. Algae were exposed in the laboratory in manganese chloride solutions with various contents of other cations, including heavy metals and macronutrients. It has been shown that some heavy metals may desorb manganese bound to the surface of algae as a result of ion exchange in the following sequence: Cd2+ < Mn2+ ≈ Zn2+ < Cu2+. It has been also found that the competitiveness of sorption of cations naturally present in the alga environment versus Mn2+ cations changes in the sequence Na+ < Ca2+ < H+, defined for the concentrations referring to the cation unit charge. The results of tests were compared to the results of dried sea algae Palmaria palmata analyses.

Open access
Analysis of Mechanical Dewatering of Digestate

-16. Butler, C.J., Green, A.M., Chaffee, A.L. (2008). MTE water remediation using Loy Yang brown coal as a filter bed adsorbent. Fuel, 87, 894-904. Clayton, S.A., Scholes, O.N., Hoadley, A.F.A., Wheeler, R.A., Mclntosh, M.J., Huynh D.Q. (2006). Dewatering of biomaterials by mechanical thermal expression. Drying Technology, 24, 819834. Clayton, S.A., Wheeler, R.A., Hoadley, A.F.A. (2007). Pore destruction resulting from mechanical thermal expression. Drying Technology, 25(4), 533-546. Ćwil M. Biogazownie rolnicze w Polsce

Open access
The Influence of Drainage Wells Barrier on Reducing the Amount of Major Contaminants Migrating from a Very Large Mine Tailings Disposal Site

hazard due to zinc and lead fl otation tailings dumped in Piekary Śląskie and wastes after repeated fl otation. Archives of Environmental Protection, 24 (2), pp. 119–130 (in Polish). [14] Sawyer, C.S. & Lieuallen-Dulam, K.K. (1998). Productivity comparison of horizontal and vertical ground water remediation well scenarios, Ground Water, 36, 1, 98–103. [15] Stalnacke, P., Nagothu, U.S. & Quevauviller, Ph. (2012). Developing the science-policy interface to integrate water research and management, [In] C. Sessa (ed.), Sustainable Water Ecosystems Management in Europe

Open access
Synthesis of Core/Shell CuO-Zno Nanoparticles and Their Second-Harmonic Generation Performance / Kodols/Čaula Cuo-Zno Nanodaļiņu Sintēze Un To Spēja Ģenerēt Otrās Harmonikas Signālu

References 1. Chatterjee, K., Sarkar, S., Rao, K.J, and Paria, S. (2014). Core/shell nanoparticles in biomedical applications. Advances in Colloid and Interface Science 209, 8-39. 2. Thatai, S., Khurana, P., Boken, J., Prasad, S., and Kumar, D. (2014). Nanoparticles and core-shell nanocomposite based new generation water remediation materials and analytical techniques: A review. Microchemical Journal 116, 62-76. 3. Kim, C. K., Lee, G. J., Lee, M. K., and Rhee, C. K. (2014). A novel method to prepare Cu@Ag core

Open access
Magnetic resonance study of co-modified (Co,N)-TiO2 nanocomposites

(pp. 33–48). Dordrecht: Springer. 31. Dolat, D., Mozia, S., Wrobel, R. J., Moszynski, D., Ohtani, B., Guskos, N., & Morawski, A. W. (2015). Nitrogen-doped, metal-modified rutile titanium dioxide as photocatalysts for water remediation. Appl. Catal. B-Environ ., 162 , 310–318. 32. Guskos, N., Anagnostakis, E. A., Gasiorek, G., Typek, J., Bodzionny, T., Narkiewicz, U., Arabczyk, W., & Konicki, W. (2004). Magnetic resonance study of α-Fe and Fe 3 C nanoparticle agglomerates in a nonmagnetic matrix. Mol. Phys. Rep ., 39 , 58–65. 33. Guskos, N

Open access
Water Management, Purification and Testing Techniques in Indo-Pak Landscapes in the Early Modern Period

in India: An Account of British Rule in the Indian Subcontinent, New York: Oxford University Press. MICHON, Jean-Louis (2008), Introduction to Traditional Islam:Illusstrated, Fine, Arts, Spirituaility, China:World Widsom, Inc. MISHRA, Anuradhaet al. (2013), Green Materials for Sustainable Water Remediation and Treatment, UK: Royal Society of Chemistry. MOHIUDDIN, Yasmeen Niaz (2007), Pakistan: A Global Studies Handbook, California: ABC-CLIO Publishing company. MOLLINGA,Peter.P (2003), On Th e

Open access
Adsorption mechanism and modelling of hydrocarbon contaminants onto rice straw activated carbons

. A1. 46, 2459–2476. DOI: 10.1002/pola.22579. 8. Zhang, R. & Moore, J.A. (2003). Synthesis, characterization and properties of polycarbonate containing carboxyl side groups, Macromol. Symp. 199, 375–390. DOI: 10.1002/masy.200350932. 9. Gültekin, I. & Ince, N.H. (2007). Synthetic endocrine disruptors in the environment and water remediation by advanced oxidation processes, J. Environ. Manage 85, 816–832. DOI: 10.1016/j.jenvman.2007.07.020. 10. Laganà, A., Bacaloni, A., De Leva, I., Faberi, A., Fago, G. & Marino, A. (2004). Analytical methodologies

Open access