Articles

CONCENTRATION OF Hg, Cd, Cu, Pb AND Zn IN SEDIMENT OF GRESIK WATERS Lestari, Lestari; Budiyanto, Fitri
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v5i1.7764

Abstract

Gresik coastal waters is one of the areas that have a potential risk for environmental damage due to anthropogenic activities. Water and sediment samples were collected to determin  metals concentration and to identify sediment quality in February 2012. Twelve samples were collected for analysis of mercury (Hg) and four other metals (Cd, Cu, Pb, and Zn). Mercury was analyzed using USEPA method 7471B with Flameless-AAS (Atomic Absorption Spectrophotometer) varian type SpectarAA VGA 20-76 and the other metals were analyzed using USEPA 30050B with Flame-AAS. Results showed that ranges and average concentrations of Hg were 0.04-0.33 (0.13) mg/kg, Cd 0.08-3.05 (0.64) mg/kg, Cu 23.7-234.0 (85.5) mg/kg, Pb 1.74-12.7 (4.29) mg/kg, and Zn 77.0-405.0 (133.0) mg/kg. Metals with high concentrations were detected in some places and by SQG-Q, surface sediment showed a moderate impact level of biological adverse effects in aquatic sediments. Keywords: mercury, heavy metal, sediment, Gresik.
ECOLOGICAL ASSESSMENT IN SEMARANG COASTAL WATER Rositasari, Ricky; Lestari, Lestari; Lestari, Lestari; Lestari, Lestari
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Coastal water is vulnerable to anthropogenic substances such as human activities by product in coastal land and  upper land area. Semarang coastal area is one of areas which has progressive development in northern coastal of Java Island.  The aim of this study was to evaluate ocean health status based on heavy metal contain and benthic foraminiferal characteristics as the bioindicator.  Sampling and laboratory activities were carried out in August 2010. Sampling stations were located on the estuaries of Western Canal Flood, Tanjung Mas Port and  Eastern Canal Flood.  The result showed that Tanjung Mas pool port had the highest Pb, Zn,and Total Organic Compounds (TOC) concentrations. The average of abnormal test of benthic foraminiferal (Ammonia beccarii) were also higher in Tanjung Mas port than in eastern and western canal flood. Keywords: assessment, coastal water, Semarang.
ECOLOGICAL ASSESSMENT IN SEMARANG COASTAL WATER Rositasari, Ricky; Lestari, Lestari; Lestari, Lestari; Lestari, Lestari
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Coastal water is vulnerable to anthropogenic substances such as human activities by product in coastal land and  upper land area. Semarang coastal area is one of areas which has progressive development in northern coastal of Java Island.  The aim of this study was to evaluate ocean health status based on heavy metal contain and benthic foraminiferal characteristics as the bioindicator.  Sampling and laboratory activities were carried out in August 2010. Sampling stations were located on the estuaries of Western Canal Flood, Tanjung Mas Port and  Eastern Canal Flood.  The result showed that Tanjung Mas pool port had the highest Pb, Zn,and Total Organic Compounds (TOC) concentrations. The average of abnormal test of benthic foraminiferal (Ammonia beccarii) were also higher in Tanjung Mas port than in eastern and western canal flood. Keywords: assessment, coastal water, Semarang.
ECOLOGICAL ASSESSMENT IN SEMARANG COASTAL WATER Rositasari, Ricky; Lestari, Lestari; Lestari, Lestari; Lestari, Lestari
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Coastal water is vulnerable to anthropogenic substances such as human activities by product in coastal land and  upper land area. Semarang coastal area is one of areas which has progressive development in northern coastal of Java Island.  The aim of this study was to evaluate ocean health status based on heavy metal contain and benthic foraminiferal characteristics as the bioindicator.  Sampling and laboratory activities were carried out in August 2010. Sampling stations were located on the estuaries of Western Canal Flood, Tanjung Mas Port and  Eastern Canal Flood.  The result showed that Tanjung Mas pool port had the highest Pb, Zn,and Total Organic Compounds (TOC) concentrations. The average of abnormal test of benthic foraminiferal (Ammonia beccarii) were also higher in Tanjung Mas port than in eastern and western canal flood. Keywords: assessment, coastal water, Semarang.
CONCENTRATION OF Hg, Cd, Cu, Pb AND Zn IN SEDIMENT OF GRESIK WATERS Lestari, Lestari; Budiyanto, Fitri
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Gresik coastal waters is one of the areas that have a potential risk for environmental damage due to anthropogenic activities. Water and sediment samples were collected to determin  metals concentration and to identify sediment quality in February 2012. Twelve samples were collected for analysis of mercury (Hg) and four other metals (Cd, Cu, Pb, and Zn). Mercury was analyzed using USEPA method 7471B with Flameless-AAS (Atomic Absorption Spectrophotometer) varian type SpectarAA VGA 20-76 and the other metals were analyzed using USEPA 30050B with Flame-AAS. Results showed that ranges and average concentrations of Hg were 0.04-0.33 (0.13) mg/kg, Cd 0.08-3.05 (0.64) mg/kg, Cu 23.7-234.0 (85.5) mg/kg, Pb 1.74-12.7 (4.29) mg/kg, and Zn 77.0-405.0 (133.0) mg/kg. Metals with high concentrations were detected in some places and by SQG-Q, surface sediment showed a moderate impact level of biological adverse effects in aquatic sediments. Keywords: mercury, heavy metal, sediment, Gresik.
ECOLOGICAL ASSESSMENT IN SEMARANG COASTAL WATER Rositasari, Ricky; Lestari, Lestari; Lestari, Lestari; Lestari, Lestari
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 5, No 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v5i1.7756

Abstract

Coastal water is vulnerable to anthropogenic substances such as human activities by product in coastal land and  upper land area. Semarang coastal area is one of areas which has progressive development in northern coastal of Java Island.  The aim of this study was to evaluate ocean health status based on heavy metal contain and benthic foraminiferal characteristics as the bioindicator.  Sampling and laboratory activities were carried out in August 2010. Sampling stations were located on the estuaries of Western Canal Flood, Tanjung Mas Port and  Eastern Canal Flood.  The result showed that Tanjung Mas pool port had the highest Pb, Zn,and Total Organic Compounds (TOC) concentrations. The average of abnormal test of benthic foraminiferal (Ammonia beccarii) were also higher in Tanjung Mas port than in eastern and western canal flood. Keywords: assessment, coastal water, Semarang.
Comparison of Adsorption Models for Cd and Zn in the Berau Delta: Water–Sediment System (Perbandingan Model Penyerapan Cd dan Zn di Delta Berau: Sistem Perairan-Sedimen) Budiyanto, Fitri; Lestari, Lestari
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 18, No 3 (2013): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Abstract

Adsorpsi merupakan proses penting dalam mengontrol transfer logam dari larutan ke padatan. Cd dan Zn merupakan logam yang banyak digunakan manusia sehingga berpotensi banyak dibuang ke lingkungan. Penelitian ini membandingkan model adsorpsi Cd dan Zn dalam sistem air laut-sedimen di delta Berau, Kalimantan Timur. Sampel air dan sedimen didapat di 12 stasiun. Untuk mendapatkan konsentrasi Cd dan Zn, sampel air dianalisis menggunakan metode back extraction yang menggunakan bahan kimia organik (Amonium pirolidinditio karbamat dan metili sobutil keton) dan anorganik (asam nitrat). Sampel sedimen dianalisis menggunakan distruksi asam yang mengacu metode dari USEPA 3050b. Data yang didapat dikalkulasi berdasar model adsorpsi yaitu: Model partisi, Freundlich Model dan Langmuir Model. Dalam perhitungan di studi ini, Delta Berau dibagi menjadi dua bagian: bagian utara dan bagian selatan. Dari kedua bagian ini, Model isotermis langmuir merupakan model yang paling cocok untuk proses adsorpsi dalam sistem air sedimen. Di sungai bagian utara, hasil perhitungan linearitas memberikan angka R2=0.949 untuk Cd dan R2=0.838 untuk Zn, sedangkan, untuk sungai bagian selatan nilai R2=0.575 untuk Cd dan R2=0.944 untuk Zn. Kapasitas adsorpsi maksimum Cd adalah 0,5-0,6 mg.kg-1 sedangkan kapasitas adsorpsi maksimum untuk Zn adalah 12-43 mg.kg-1. Prediksi kapasitas maksimal sedimen menggambarkan total kapasitas sedimen sebagai Cd dan Zn deposit. Penambahan Cd dan Zn akan menyebabkan logam-logam tersebut tidak teradsorpsi dan berpotensi racun bagi organisme perairan. Kata kunci: delta Berau, adsorpsi, air, sedimen, model isotermis langmuir  Adsorption is important process for controlling metals transfer from dissolved phase to solid phase. Cd and Zn become trace metal which generally used in human activity and the release of those trace metals into aquatic environment cannot be evaded.The purpose of this work was to compare adsorption models of Cd and Zn in water-sediment system in Berau Delta, East Kalimantan. Sediment and water sample were collected at 12 stations. Measuring Cd and Zn concentration, water sample analysis was conducted using organic chemicals (Ammonium Pyrrolidine Dithio Carbamate and Methyl Isobutyl Ketone) and inorganic chemicals (nitric acid) based on back extraction procedure. On the other hand, sediment analysis was conducted using acid destruction according to USEPA method 3050b. The data would be calculated in some different adsorption model: Partition model, Freundlich model and Langmuir model. In this study, Berau Delta was divided into two groups: North river stream (N) and South river stream (S). In both groups,Langmuir isotherm model was the most representative model for adsorption process in water-sediment system. In North stream, the linearity of data gave R2=0.949 for Cd and R2=0.838 for Zn, whereas, R2=0.575 for Cd and R2=0.944 for Zn calculated in the South stream. Maximum adsorption capacity of Cd was 0.5-0.6 mg.kg-1 and maximum adsorption capacity of Zn was 12-43 mg. kg-1. Those maximal adsorption capacities illustrated the total capability of sediment as Cd and Zn deposit. Another Cd and Zn input will not be adsorbed and probably become bioavailable for aquatic life. Keywords: Berau delta, adsorption, water, sediment, langmuir isotherm model
Business Studies Pondoh Plants in Sand Nagari Binjai Kecamatan Silaut Kabupaten Pesisir Selatan Lestari, Lestari; Erita, Yeni; U, Iswandi
Pendidikan Geografi Vol 2, No 2 (2013): Jurnal Wisuda Ke 47, Pendidikan Geografi
Publisher : STKIP PGRI Sumbar

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Abstract

Silaut Nagari is one of the transmigration areas in West Sumatera that were previously identified by a wilderness area that has a population of relatively small, so that the mixture of the Minang people and Javanese. At the present time the villages Silaut livelihood besides there is also a garden of palm plantation livelihoods barking. In general, people gardening bark is derived from the Javanese transmigration undertaken by the former government. This study aimed to obtain the data, process, analyze and discuss the study of crop enterprises in Nagari Pasir Binjai Kecamatant Silaut Kabupaten Pesisir Selatan in view of: 1) Plant nurseries Pondoh 2) Preparation of planting Pondoh 3) Treatment plants Pondoh 4) Fertilizing plants Pondoh 5) Harvest time Pondoh 6) Labor 7) Sources of capital plant Pondoh 8) The level of production of the crop Pondoh 9) Marketing efforts Pondoh plants.This study classified as descriptive research, the population in this study were all families (KK) pondoh salak farmers in Nagari Pasir Binjai Kecamatan Silaut Kabupaten Pesisir Selatan. The samples were taken with a total sampling technique, the sample numbered 56 families (KK). Collecting data using an open questionnaire, an analysis that is in use is descriptive statistics using the percentage formula.The results showed: 1) Plant nurseries Pondoh done in vegetative and generative (55.4%), the type of plants used are bark barking pondoh (100%). 2) Preparation penanamna using water pool but only partially (32.1%) and farmers generally use drainage (94.6%). 3) Treatment, farmers generally do cluster thinning (96.4%), weeding bunches (91.0%), pengemburan land (89.3%). 4) fertilization, the type of fertilizer used is usually organic and inorganic fertilizers (85.7%). Way is to sprinkle fertilizer fertilizer around the plants (92.8%). 5) harvest, yields 2-4 times a month (78.6%), how to select a crop that is picked (87.5%). 6) labor, generally numbered 2-5 people (75%). Age farmers generally >45 years (42.9%). 7) used the equity capital of Rp. >5 million to 10 million (51.8%), 8) production, the average number of production 1 acre 1 year ie >5-8 tonnes (62.5%), and the average number of production acres 1 ½ years ie 2-5 tonnes (64.3%). 9) the average marketing price offered 1 kg Rp. 9000-12000 (89.3%), retail marketing system done and the bulk (84.0%).
Chaetoceros gracilis AS A BIOINDICATOR OF SEDIMENT QUALITY Puspitasari, Rachma; Lestari, Lestari
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 6, No 1 (2014): Electronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Chronic sediment toxicity tests could be used to evaluate the effects of sediment on critical stages in the life of an organism like invertebrate larvae and microalgae. Microalgae play an important role in aquatic ecosystem due to their role as producer in food chain producing organic matter and oxygen through photosynthesis process. This paper aimed to assess sediment quality of Semarang water using chronic sediment toxicity test. Research was conducted by testing 13 sediment samples from Semarang coastal region in August, 2010. Results showed that sediments exposed for 96 hours were still able to stimulate the growth of C. gracilis eventhough the copper concentration was above standard value provided by the CCME. The conclusion from this research was that sediment in Semarang still in good condition and can support growth of C. gracilis as primary producer. Chronic sediment toxicity test using C. gracilis could be combined with heavy metal measurement for sediment quality asessment. Keywords: sediment, bioindicator, diatomae, C. gracilis, chronic toxicity, Semarang
Peningkatan Hasil Belajar Siswa Kelas V Peningkatan Hasil Belajar Siswa Kelas V SDN Tada Melalui Penerapan Metode Pembelajaran Penemuan Terbimbing Pada Mata Pelajaran IPA Asfian, Asfian; Lestari, Lestari; Sakung, Jamaluddin
Jurnal Kreatif Tadulako Online Vol 4, No 7 (2016): Junal Kreatif Tadulako Online
Publisher : Jurnal Kreatif Tadulako Online

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Abstract

Masalah dalam peneltian ini adalah  rendahnya hasil belajar siswa di kelas V SDN Tada. Tujuan dari penelitian ini adalah: Ingin meningkatkan hasil belajar siswa. Metode pembelajaran yang digunakan dalam penelitian ini yaitu penemuan terbimbing. Penelitian ini adalah penelitian tindakan (action research) sebanyak dua siklus. Setiap siklus terdiri dari empat tahap yaitu: perencanaan, tindakan, observasi dan refleksi. Data yang diperoleh berupa hasil tes formatif, lembar observasi kegiatan belajar mengajar.Dari hasil analis didapatkan bahwa hasil belajar siswa mengalami peningkatan dari siklus I sampai siklus II yaitu, siklus I (73,33 %), dan siklus II (93,33 %). Kesimpulan dari penelitian ini adalah metode pembelajaran penemuan terbimbing dapat meningkatkan hasil belajar siswa SDN Tada, serta metode pembelajaran ini dapat digunakan sebagai salah satu alternatif pembelajaran IPA. Kata Kunci: Peningkatan Hasil Belajar, Metode Penemuan Terbimbing