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Tanjung, Denny Akbar
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Energy Environmental Science Immunology & microbiology Neuroscience Physics

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Investigasi Kualitas Air Pada Daerah Aliran Sungai Pisang Kota Padang-Sumatera Barat Tanjung, Denny Akbar
Journal of Natural Sciences Vol 4, No 3 (2023): Journal of Natural Sciences November
Publisher : Mahesa Research Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34007/jonas.v4i3.438

Abstract

The aim of this research is to test water quality, including pH, conductivity, total dissolved solids (TDS), salinity, and turbidity. The research method uses quantitative methods. The research area includes 10 sample points around the Pisang river basin, Bungus Teluk Kabung, Padang, and West Sumatra. Samples were measured using a predetermined measuring instrument with three repetitions. Based on test results in all study areas, several water quality testing parameters met the standards of Ministry of Health Regulation No. 2 of 2023, such as pH and total solid density. Meanwhile, other parameters, such as salinity, conductivity, and turbidity, are still far from the predetermined thresholds. Treatment needs to be carried out so that the water can be used according to needs.
The effect of maleic anhydride concentration in manufacturing polypropylene grafted maleic anhydride compatibilizer on the test percent of grafting degree TANJUNG, DENNY AKBAR; JAMARUN, NOVESAR; LUBIS, ROSLIANA
Jurnal Natural Volume 24 Number 2, June 2024
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v24i2.35317

Abstract

The difference in polarity between materials often prevents direct interaction; therefore, a compatibilizer is required to facilitate reactions between polar and non-polar substances. This study aims to investigate the effect of maleic anhydride (MA) concentration on the grafting process of MA onto polypropylene (PP) chains, using benzoyl peroxide (BPO) as an initiator. The blending method employing an internal mixer was used to combine the materials, and the degree of grafting was determined via titration, with three replicates performed for accuracy. The results indicated that the highest grafting degree, 10.28%, was achieved at a composition of 86% PP, 11% MA, and 3% BPO. Fourier Transform Infrared (FTIR) spectroscopy analysis of polypropylene grafted with maleic anhydride (PP-g-MA) revealed new absorption peaks at wavenumbers 1707 cm and 1162 cm. Furthermore, increasing the concentration of maleic anhydride did not significantly affect the grafting degree. This study provides valuable insight for the development of PP-g-MA compatibilizers.
Assessing the water quality in the Timbalun river watershed, Padang City, West Sumatra, Indonesia HAR, RUSLI; TANJUNG, DENNY AKBAR; JAMARUN, NOVESAR
Jurnal Natural Volume 25 Number 1, February 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v25i1.42009

Abstract

The purpose of this study is to assess water quality, specifically pH, conductivity, total dissolved solids (TDS), salinity, and turbidity. The research utilizes quantitative methods and covers 15 sampling points across the Timbalun River basin in Padang City, West Sumatra, Indonesia. Samples were measured based on several parameters, with three repetitions for accuracy. The testing took place from August to September 2024. The results showed that some water quality parameters, such as pH and total dissolved solids, met the standards outlined by Ministry of Health Regulation No. 2 of 2023. However, other parameters, including salinity, conductivity, and turbidity, did not meet the specified thresholds. It is essential to implement treatment measures to ensure the water meets the required standards for its intended use.
The effectiveness of naphthaleneacetic acid and kinetin on the development of plantlet book cuttings of Chrysanthemum ornamental plants BUDI, RAHMAD SETIA; PARAMUJI, MUJI; TANJUNG, DENNY AKBAR
Jurnal Natural Volume 25 Number 1, February 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v25i1.42084

Abstract

The high demand for chrysanthemum flowers, coupled with the challenge of acquiring quality seeds in large quantities within a short timeframe, presents significant problems in this study. One potential solution is to propagate plants and utilize plant growth regulators to accelerate their development. Tissue culture techniques, which are essential in agriculture and biotechnology, are employed to produce new plants by isolating, developing, and duplicating specific plant cells or tissues in the laboratory. This study aims to assess the effects of two plant growth regulators Naphthalene Acetic Acid (NAA) and Kinetin on the growth and development of stem cuttings or nodes from ornamental chrysanthemum plants (chrysanthemum) in vitro using MS media. The research utilized a completely randomized design (CRD) factorial approach featuring two treatment factors: NAA and Kinetin. A total of nine treatment combinations were tested, with NAA concentrations of 0.5, 1.0, and 1.5 ml L-1, and Kinetin concentrations of 1, 2, and 3 ml L-1. Each treatment was repeated three times. Observations included measurements of plant height, leaf count, root count, and wet weight. The best results for each parameter were observed in treatment K3N2, which yielded a plant height of 30.73 mm and an average of 18.33 leaves. The optimal results for root count and wet weight were found in treatment K3N3, which produced an average of 13.83 roots and 3.57 grams, respectively. Overall, increasing the concentrations of NAA and Kinetin positively influenced all parameters evaluated.
Design analysis of drainage system design on coal mining land BAHARUDDIN, ICHSAN INVANNI; HAR, RUSLI; ASSHIDIQQI, MUHAMMAD HABIB; ANARTA, RUDY; TANJUNG, DENNY AKBAR; MARYANTI, ENDANG
Jurnal Natural Volume 25 Number 3, October 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v25i3.45589

Abstract

PT Bumi Bara Makmur Mandiri is a mining company engaged in coal mining, located in Hajran Village, Bathin XXIV District, Batang Hari Regency, Jambi Province. The company employs an open-pit mining method, which results in the formation of depressions that act as rainwater catchment areas, creating pools (sumps). To manage these sump areas effectively for mining activities, a mine dewatering drainage system is implemented. Over the past ten years, rainfall data indicates a catchment area of 246.02 hectares, with an estimated rainfall of 280.88 mm for a return period of ten years. The groundwater that accumulates in the pooling area has an inflow rate of 0.11 m/s, leading to a total water discharge entering PIT A of 39.12 m/second. Currently, there is one pump available with a power capacity of 10.83 kW to remove this water. Due to the significant water discharge, it is essential to design an economical open flow that can handle a flow rate of 2.96 m/s. Furthermore, a design for a holding pond is required, as the existing capacity is insufficient to accommodate the incoming water discharge, which hampers the sedimentation process. To address this, a redesigned settling pond with dimensions of 46 m x 36 m x 7 m and six compartments has been proposed. This solution will enhance the effectiveness of the mine drainage process
Co-Authors ASSHIDIQQI, MUHAMMAD HABIB Budi, Rahmad Setia HAR, Rusli Ichsan Invanni Baharuddin Maryanti, Endang Novesar Jamarun Paramuji, Muji Rosliana Lubis, Rosliana Rudy Anarta