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All Journal Naturalis : Jurnal Penelitian Pengelolaan Sumberdaya Alam dan Lingkungan Journal of Bioresources and Environmental Sciences
Adhika Putra Agra Wijnana
Department of Forestry, Faculty of Agriculture, University of Bengkulu
Earth & Planetary Sciences Environmental Science

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KUALITAS PERAIRAN DAN KEANEKARAGAMAN MIKRO ALGA DI DANAU DENDAM UNTUK MENYUSUN STRATEGI PENGELOLAAN KAWASAN TWA DANAU DENDAM Wijnana, Adhika Putra Agra; Martono, Agus; Martono, Dede; Susatya, Agus; Yansen, Yansen
Naturalis: Jurnal Penelitian Pengelolaan Sumberdaya Alam dan Lingkungan Vol. 12 No. 1 (2023)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/naturalis.12.1.24223

Abstract

Lake Dendam is never a loticwaters with lots of human activities around the area. The high human activity around the waters has an impact on the quality of the waters and the organisms in the vicinity. This observation was carried out to obtain an up-to-date picture of water quality and micro-algae biodiversity in Revenge Lake for developing sustainable management strategies. Tests were carried out on the chemical and physical quality of the waters, and the biodiversity of microalgae which were then processed into an area management strategy. The results of the water quality test showed slightly polluted conditions with values of dissolved oxygen (DO), chemical oxygen demand (COD), total suspended solid (TSS), and phosphate which were still outside the water quality standards. However, conditions that can still be tolerated are peat waters. The microalgae biodiversity test showed the dominance and diversity of microalgae genera in the waters. The dominant genus is Nitzchia sp. From these results obtained six sustainable management strategies for Revenge Lake.   Keywords : Biodiversity, Dendam Lake, microalgae, water quality
Heavy Metals Concentration in Sea Water at Cilegon Coastal Waters Ishlahul Fikri; Ibrahim Ahmad; Afda Refani; Adhika Putra Agra Wijnana; Nur Jamiah Rangkuti; Ivana Rindi Antika P
Journal of Bioresources and Environmental Sciences Vol 5, No 1 (2026): April 2026
Publisher : BIORE Scientia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/jbes.2025.19977

Abstract

Cilegon City is an industrial city with an area of 175.51 km2, approximately 43.6% of which is comprised of coastal and marine areas. Industrial activities, ports, and even household waste can produce pollutants that flow into the sea. One of the pollutants entering the waters is heavy metals. Common heavy metals found are Cadmium (Cd), Copper (Cu), and Lead (Pb). This research was conducted in February 2022 in the waters of Cilegon. Heavy metal concentration measurements were conducted at an ISO 17025:2017 accredited laboratory. One liter of seawater samples was from the surface (0-50 cm), filtered, and HNO3 preservative was added to a pH of 2 in polyethylene bottles. Measurements of aquatic environmental quality parameters, including temperature, salinity, and pH, were conducted in situ. Dissolved heavy metal concentrations were analyzed descriptively and compared with seawater quality standards in accordance with Government Regulation Number 22 of 2021 concerning the implementation of environmental protection and management. Water quality assessment was conducted by calculating the Pollution Index in accordance with the Decree of the Minister of Environment Number 115 of 2003. The results of the water temperature measurements ranged from 28.8 to 30.4°C, salinity ranged from 29 to 31 ppm, and the water pH obtained was 7.7 to 8.4, which stated that the environmental parameters of the waters met the quality standards. The concentration of dissolved Cd was <0.00003 at all stations. The concentration of dissolved Cu obtained ranged from <0.006 to 0.0129 mg/l; two stations obtained results exceeding the quality standards. The concentration of dissolved Pb obtained ranged from <0.00012 to 0.017 mg/l; two stations exceeded the quality standards. The results of the water pollution index calculations stated that all research stations were in a slightly polluted condition.
Co-Authors Afda Refani Agus Martono AGUS SUSATYA Fikri, Ishlahul Ibrahim Ahmad Ivana Rindi Antika P Martono, Dede Nur Jamiah Rangkuti Yansen Yansen, Yansen