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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Journal of Environmental Science and Sustainable Development
Wahyudi, A’an Johan
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Humanities Earth & Planetary Sciences Energy Environmental Science Social Sciences

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SEAWEED AS BIOADSORBENT FOR NITROGEN AND PHOSPHORUS REMOVAL Meirinawati, Hanny; Wahyudi, A’an Johan
Journal of Environmental Science and Sustainable Development Vol. 6, No. 1
Publisher : UI Scholars Hub

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Abstract

Eutrophication has become a serious environmental problem because of the excessive amounts of nitrogen and phosphorus in the water. Aquaculture waste is one of the drivers of eutrophication. Seaweed is known for its ability to remove nutrients from the water. In Indonesia, research about the efficiency of seaweed in decreasing nutrient concentration in wastewater is still rare. This article reviewed the use of seaweed as an adsorbent for nitrogen and phosphorus removal. This review aims to summarize the efficiency of nutrient removal in various genera of macroalgae. The comparing bioremediation potentials of macroalgae, including growth, nutrient bioaccumulation capacity, and potential nutrient uptake, are discussed. The factors influencing nutrient uptake will also be addressed in this study. The literature was collected from ScienceDirect and Google Scholar databases. This paper found that red algae from the genus Gracilaria were the most widely used as bioremediation agents compared to other genera. This article is expected to be useful as a basis for selecting seaweed to be used as a bioremediation agent. We hope that there will be more research on seaweed as a bioadsorbent in Indonesia.
Variability of Marine Carbonate Systems in Seagrass and Coral Reef Ecosystems of Pari and Lombok Islands, Indonesia Afdal, Afdal; Bengen, Dietriech G.; Wahyudi, A’an Johan; Rastina, Rastina; Purwiyanto, Anna Ida Sunaryo; Prayitno, Hanif Budi; Hamzah, Faisal; Suteja, Yulianto; Adi, Novi Susetyo; Koropitan, Alan F.
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 2 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.2.221-236

Abstract

The increase in anthropogenic CO2 emissions has induced significant physical and biogeochemical alterations in oceans worldwide, including warming, acidification, and oxygen depletion. Coastal areas are particularly vulnerable due to intensified human activities and terrestrial influences, resulting in increased coastal ocean acidification driven by atmospheric CO2 absorption and regional biological and anthropogenic processes. However, research on the collective impact of land-sea interaction and air-sea CO2 exchange on coastal ocean acidification in severely disturbed areas, such as the small islands of Lombok and Pari in Indonesia, remains limited. This study aims to investigate the daily fluctuations in marine carbonate systems and aragonite saturation (Ωarag) levels in the vicinity of seagrass and coral reef habitats in Pari Island and Sire Bay, Lombok. Seawater samples were collected from Sire Bay, Lombok, and the coastal waters of Pari Island to analyze the carbonate systems, CO₂ flux, and metabolic processes. The findings indicate that Pari Island's coastal waters are more susceptible to ocean acidification than Sire Bay, Lombok, showing significantly lower pH values and Ωarag (P<0.05), ranging from 7.60 to 8.00 and 1.04 to 2.54, respectively. This disparity arises from the decreased temperature and salinity in Pari Island's coastal waters during the northwest monsoon, coupled with the deteriorated state of the seagrass and coral reef ecosystems, altering the equilibrium of ecosystem productivity and calcification. The study underscores the necessity of adopting specific coastal management tactics to lessen the effects on fragile ecosystems, highlighting the urgency for additional studies to evaluate adaptive and conservation strategies to preserve coastal biodiversity and ecosystem services.
Co-Authors Afdal Afdal, Afdal Alan Frendy Koropitan Anna Ida Sunaryo Purwiyanto Dietriech Geoffrey Bengen Faisal Hamzah Hanif Budi Prayitno Meirinawati, Hanny Novi Susetyo Adi, Novi Susetyo Rastina, Rastina Yulianto Suteja