Sofia Wantasen
Fakultas Pertanian, Universitas Sam Ratulangi Manado

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BIOMONITORING DAMPAK EKOLOGIS MERKURI DI DAERAH ALIRAN SUNGAI TORAUT KABUPATEN BOLAANG MONGONDOW Rantung, John L.; Wantasen, Sofia
EUGENIA Vol 22, No 2 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.22.2.2016.12956

Abstract

ABSTRACT Traditional gold mining in Toraut Watershed Bolaang Mongondow District was used Merkuri Amalgamation that produced tailing. Tailing are discharged to river and environment sorounding that can enter Toraut River and flows to the down stream Mongondow river (beach Inobonto). This study aims: 1) To determine Hg concentrations in River Toraut up stream, middle stream and down stream; 2) To determine Hg concentrations in sediment of the River Toraut up stream, middle stream and down stream; 3) To determine Hg concentrations in aquatic plantsof the River Toraut up stream, middle stream and down stream.  Location research in River Toraut up stream, middle stream and down stream. Data collected by observation and laboratory analysis Merkuri concentration in River Toraut, sediment, and aquatic plant. Method data analysis are descriptif, Graphic Method and to compare with standart Goverment PP. No.82/2001 Class II. The analysis showed that the concentration of Merkuri in River Toraut up stream, in the middle stream and down stream is<0.00005 mg/l. The concentration of Merkuri in sediments River Toraut up stream, the middle stream and down stream ranged < 0.05-1.45 mg/kg dry. The concentration of Merkuri in tissue plant aquatic location up stream of the River Toraut, the middle stream and down stream range < 0.001-0.013 mg /kg wet.Keywords : biomonitoring, ecological impacts merkuri, Toraut Watershed
DAMPAK TRANSFORMASI NITROGEN TERHADAP LINGKUNGAN BIOTIK DI DANAU TONDANO PROVINSI SULAWESI UTARA Wantasen, Sofia; Sudarmadji, Sudarmadji; Sugiharto, Eko; Suprayogi, Slamet
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 19, No 2 (2012)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Nitrogen di lingkungan akan mengalami transformasi ke dalam bentuk-bentuk senyawa antara lain nitrat (N03), nitrit (N02-), ammonia (NH3). Transformasi dari nitrogen menjadi nitrat, nitrit, dan ammonia akan berdampak negatif terhadap lingkungan biotic yaitu terbentuknya kondisi toksik, berdampak negatif pada biota air (flora akuatik), dominansi flora akuatik danau serta berubahnya fungsi ekosistern danau. Penelitian ini bertujuan untuk mengkaji dampak transformasi nitrogen terhadap Iingkungan biotik (flora akuatik) di Danau Tondano. Pengambilan sam pel kualitas air dilakukan dengan menggunakan metode composite sampling pada 24 lokasi sampel di Danau Tondano yaitu 6 sampel di bagian timur dan au, 3 sampel di bagian barat danau, 4 sampel di bagian selatan danau dan 10 sam pel di bagian tengah danau dan 1 sampel di bagian utara Danau Tondano, kemudian dilakukan pengukuran in situ untuk parameter temperatur air, dan pH. Analisis parameter nitrat, nitrit, ammonia dilakukan di Laboratorium Balai Teknik Kesehatan Lingkungan Provinsi Sulawesi Utara. Lokasi pengambilan sampel flora akuatik adalah 1 sampel di bagian barat Danau tondano (Paletoan), 4 sampel di bagian timur danau (Eris, Tasuka, Ranomerut), dan 1 sampel di bag ian utara danau (Tolour). Hasil analisis laboratorium menunjukkan bahwa transformasi nitrogen menjadi nitrat, nitrit, ammonia di permukaan Danau Tondano terkonsentrasi tinggi di bagian timur dan bagian tengah Danau Tondano. flora akuatik yang mendominasi perairan adalah Eceng Gondok ( Eichhornia crassipes) dengan Indeks Nilai Penting (INP) 60-155.
TRANSFORMASI NITROGEN DI OUTLET SALURAN IRIGASI DAERAH ALIRAN SUNGAI TONDANO Wantasen, Sofia
Sainteknol : Jurnal Sains dan Teknologi Vol 13, No 1 (2015): June 2015
Publisher : Unnes Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v13i1.5337

Abstract

Nitrogen di lingkungan akan mengalami transformasi ke dalam bentuk senyawa nitrat (NO 3 - ), nitrit (NO 2 - ), ammonia (NH 3 ) Transformasi nitrogen tersebut dipengaruhi oleh kondisi lingkungan. Penelitian ini bertujuan untuk mengkaji transformasi nitrogen di outlet saluran irigasi Daerah Aliran Sungai . (DAS) Tondano. Cara penelitian adalah observasi lapangan terhadap aktivitas pertanian dan pengambilan sampel kualitas air dilakukan dengan menggunakan metode composite sampling pada 25 lokasi sampel di outlet saluran irigasi. Analisis parameter nitrat, nitrit, ammonia dilakukan di Laboratorium Balai Teknik Kesehatan Lingkungan Provinsi Sulawesi Utara. Analisis data menggunakan Metode Grafik dan membandingkan dengan Baku Mutu sesuai PP No. 82/2001 Kelas II. Hasil penelitian menunjukkan bahwa transformasi nitrogen (nitrat, nitrit, ammonia) di outlet saluran irigasi persawahan bagian selatan (konsentrasi NO 3 : 8,6-18,4 mg/l; NO 2 : 0,14-0,25 mg/l; NH 0-2,6 mg/l); outlet saluran irigasi persawahan bagian barat (konsentrasi NO 3 3 : 1,33-12,2 mg/l; NO : 0-0,77 mg/l; NH 0,01-0,86 mg/l) dan outlet saluran irigasi persawahan bagian timur
KAJIAN KUALITAS AIR SUNGAI BENING SEBAGAI SUMBER AIR IRIGASI PERSAWAHAN DI DESA MOPUYA SELATAN II KECAMATAN DUMOGA UTARA KABUPATEN BOLAANG MONGONDOW Yusuf, Hendra; Wantasen, Sofia; Lumingkewas, Adeleyda M. W.
COCOS Vol 1, No 3 (2018)
Publisher : COCOS

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Abstract

ABSTRACT  The purpose of this study was to determine the water quality of Bening River in Subdistrict Dumoga Utara District Bolaang Mongondow which would be used as rice field irrigation water in the South Mopuya II Village, Subdistrict Dumoga Utara District Bolaang Mongondow. The study was conducted for three months (3 months), namely April to June, the location of water sampling is the Bening River in South Mopuya II Village, then analyzed in the Water Quality Laboratory. The results of the analysis show that the Bening River Sodium Adsorption Ratio (SAR) concentration in the Upper Area (0.61), in theBening River Lower Area (0.59), is in good quality.  DHL (Electrical Conductivity) concentrations in the Bening River in the Upper Area (2.39.10-5dS/m), in the Bening River Lower Area (2.59.10-5dS/m), are in good quality.  TDS (Total Dissolved Solid) concentration in the Bening River in the Upper Area (167 mg/l), in the Bening River Lower Area (181 mg/l), in good quality. Chloride (Cl) Concentration on Bening River in the Upper Area (0.031 me/l), in the Bening River Lower Area (0.051 me/l), in good quality. Boron (B) Concentration on Bening River in the Upper Area (0.005 mg/l), in the Bening River Lower Area (0.005 mg/l), in good quality.  Nitrate (NO3) concentrations in the Bening River in the Upper Area (0.147 me/l), in the Bening River Lower Area (0.179 mg/l), in the good category.  pH concentration in the Bening River in the Upper Area (8.19), in the Bening River Lower Area (7.55), in good quality.  The results of the analysis of Bening River water quality are still in good category or meet the requirements in accordance with the value of Irrigation Water Quality Standards Ayers and Wetscot, 1985.  Keywords:, Water Quality, Sungai Bening, Irigation Water.
STUDI KUALITAS AIR IRIGASI DUMOGA DI KABUPATEN BOLAANG MONGONDOW PROVINSI SULAWESI UTARA Wantasen, Sofia; Luntungan, Joudie. N.
Bumi Lestari Journal of Environment Vol 17 No 2 (2017)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2017.v17.i02.p04

Abstract

Air irigasi berperan sangat penting dan merupakan salah satu kunci keberhasilan peningkatan produksi tanaman padi di lahan sawah. Tujuan dari penelitian ini adalah untuk mengetahui kondisi kualitas air Irigasi Dumoga di Kabupaten Bolaang Mongondow Provinsi Sulawesi Utara. Cara penelitian adalah observasi lapang terhadap aktivitas pertanian dan pengambilan sampel kualitas air irigasi dilakukan dengan menggunakan metode composite sampling di saluran Irigasi Dumoga. Pengukuran in situ pH, dan temperatur. Analisis konsentrasi TDS, TSS, DHL, nitrat, fosfat, natrium, kalsium, dan magnesium dilakukan di laboratorium. Analisis data menggunakan Metode Grafik dan membandingkan dengan Baku Mutu sesuai PP No. 82/2001 Kelas IV, serta analisis data menggunakan perhitungan Sodium Absorption Ratio (SAR) Hasil penelitian menunjukkan bahwa temperatur air Irigasi Dumoga 29,3 C, pH 7,12, TDS 127 mg/l, TSS 7 mg/l, DHL 182 µS/cm, Nitrat 0,040 mg/l,&nbsp; Fosfat-total 0,076 mg/l&nbsp; memenuhi syarat sesuai PP No. 82/2001 Kelas IV.&nbsp; Konsentrasi natrium 6,38 mg/l, kalsium 0,76 mg/l, magnesium 0,27 mg/l.
DISTRIBUSI SPASIO -TEMPORAL NITROGEN DI DAERAH TANGKAPAN AIR DANAU TONDANO PROVINSI SULAWESI UTARA Wantasen, Sofia; Luntungan, Joudie N.
Bumi Lestari Journal of Environment Vol 16 No 1 (2016)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2016.v16.i01.p03

Abstract

The spatio temporal distribution of nitrogen in catchment area of   Lake Tondano wasimportant to investigate because agricultural residue comes from the catchment potentiallydecreased water quality in Lake Tondano. The purpose of this study was to examine thedistribution of nitrogen spatially and temporally in the catchment area of Lake Tondano.The study was conducted in the field and laboratory. Water quality sampling conducted byusing composite sampling on the rivers, lake Tondano and outlet of irrigation channels.The data collected was the total nitrogen, nitrate, ammonia in 2001, 2008 and 2014. Datawere analyzed using Graph Method and Spatial Analysis.        The results showed that the distribution of total nitrogen that has a high concentrationfound in the outlet streams and irrigation canals outlet. High nitrate accumulates in theoutlet of Lake Tondano. Nitrate concentration can be divided into 9 (nine) classes, namelyconcentration of 0.100 to 0.211 mg / l; 0.211 to 0.322 mg / l;  0.322 to 0.433 mg / l;  0.433 to0.544 mg / l; From 0.544 to 0.655 mg / l; From 0.655 to 0.766 mg / l; 0.766 to 0.877 mg / l;0.877 to 0.988 mg / l; and 0,988- 1,100 mg / l. Ammonia, spatially spread evenly on thesurface of Lake Tondano. Ammonia concentration can be divided into 9 (nine) class is aclass that has a concentration of 0.000 to 0.064 mg / l; From 0.064 to 0.129 mg / l; 0.129 to0.193 mg / l; From 0.193 to 0.258 mg / l; 0.258 to 0.322 mg / l; 0.322 to 0.387 mg / l; From0.387 to 0.451 mg / l; 0.451 to 0.516 mg / l; and from 0.516 to 0.580 mg / l. Concentrationsof nitrate and ammonia fluctuated from year to year of observation. This was influenced byfertilization in rice fields.
TRANSFORMASI NITROGEN DI OUTLET SALURAN IRIGASI DAERAH ALIRAN SUNGAI TONDANO Wantasen, Sofia
Sainteknol : Jurnal Sains dan Teknologi Vol 13, No 1 (2015): June 2015
Publisher : Unnes Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v13i1.5337

Abstract

Nitrogen di lingkungan akan mengalami transformasi ke dalam bentuk senyawa nitrat (NO 3 - ), nitrit (NO 2 - ), ammonia (NH 3 ) Transformasi nitrogen tersebut dipengaruhi oleh kondisi lingkungan. Penelitian ini bertujuan untuk mengkaji transformasi nitrogen di outlet saluran irigasi Daerah Aliran Sungai . (DAS) Tondano. Cara penelitian adalah observasi lapangan terhadap aktivitas pertanian dan pengambilan sampel kualitas air dilakukan dengan menggunakan metode composite sampling pada 25 lokasi sampel di outlet saluran irigasi. Analisis parameter nitrat, nitrit, ammonia dilakukan di Laboratorium Balai Teknik Kesehatan Lingkungan Provinsi Sulawesi Utara. Analisis data menggunakan Metode Grafik dan membandingkan dengan Baku Mutu sesuai PP No. 82/2001 Kelas II. Hasil penelitian menunjukkan bahwa transformasi nitrogen (nitrat, nitrit, ammonia) di outlet saluran irigasi persawahan bagian selatan (konsentrasi NO 3 : 8,6-18,4 mg/l; NO 2 : 0,14-0,25 mg/l; NH 0-2,6 mg/l); outlet saluran irigasi persawahan bagian barat (konsentrasi NO 3 3 : 1,33-12,2 mg/l; NO : 0-0,77 mg/l; NH 0,01-0,86 mg/l) dan outlet saluran irigasi persawahan bagian timur