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All Journal HAYATI Journal of Biosciences Microbiology Indonesia Jurnal Purifikasi Current Research on Biosciences and Biotechnology
SITI KHODIJAH CHAERUN
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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Journal : Jurnal Purifikasi

 1 
QUANTITATIVE ANALYSIS OF NITROGEN COMPOUNDS IN PADDY FIELDS AMMENDED WITH UREA FERTILIZER Siti Khodijah Chaerun
Purifikasi Vol 8 No 1 (2007): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v8.i1.119

Abstract

A field experiment was conducted to quantitatively analyze nitrogen (N) compounds as both inorganic and organic N (measured as total Kjeldahl N (TKN), NH4+-N, NO2--N, NO3--N, organic N and total N) and N pollution loading (measured as total N load) in paddy fields after the application of various dosages of urea [CO(NH2)2] fertilizer. Three urea levels (0, 200, and 300 kg urea/ha) and IR64 rice were used in a factorial designed experiments. The irrigation water in both outlet and inlet water flow was sampled after urea surface application at 0, 15 and 35 days after planting (DAP) and those of N concentrations were determined. In general, the urea fertilizer application of three N levels showed significantly increased inorganic and organic N concentrations in outlet irrigation water (P < 0,05) but did not increase total N load (P > 0,05) compared to inlet irrigation water. When no urea fertilizer was applied (0 kg urea/ha), high N concentration was measured in irrigation water, indicating that irrigated water system had carried N compounds other than urea fertilizer applied. All the N compounds increased significantly except for NO2--N and total N at 0 kg urea/ha, NO2--N and organic N at 200 kg urea/ha, and TKN at 300 kg urea/ha, which were not significantly different between outlet and inlet irrigation water (P > 0,05). These results revealed that although the three urea fertilizer application levels did not increase N loading, they have a significant effect on both inorganic and organic N concentrations in surface water runoff, thus eventually entering and polluting the water receiving bodies with the subsequent increase of eutrophication.
PHYSICOCHEMICAL CHARACTERIZATION OF PADDY SOILS CONTAMINATED WITH INDUSTRIAL WASTEWATERS: IMPLICATIONS FOR BIOREMEDIATION Siti Khodijah Chaerun
Purifikasi Vol 10 No 2 (2009): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v10.i2.169

Abstract

Concern has mounted over recent decades regarding the paddy soils located in Rancaekek, Bandung, West Java, Indonesia that have been heavily polluted by industrial effluents for many years. Recent efforts to remediate the heavily polluted sites have failed due to incomplete understanding of the site characteristics. Hence, this study dealt with the physicochemical characterization of these soils to acquire a better understanding of the physicochemical impacts and eventually improve their soil quality so that they would again be suitable for agriculture. The polluted soils contained much higher salt concentrations, higher salinity, and elevated levels of heavy metals (Cr, Mn, Cu and Zn) than unpolluted soils at control sites. However, no significant difference was observed in the mean of pH between all sites. Maximum water holding capacity and cation exchange capacity (Na and K) in polluted soils were significantly greater than those in unpolluted soils. Moreover, the polluted soils had higher contents of N, P, K, S, organic C, and lower C/N ratio than unpolluted soils. These results indicate that the industrial wastewaters-contaminated paddy soils have major changes in their physicochemical characteristics, therefore being informative to the development of bioremediation strategies of these soils.
Co-Authors Edy Sanwani Fika Rofiek Mufakhir Frideni Yushandiana Halimatul Husni Nuslia Bayangkara Lamandhi Ronny Winarko Widi Astuti