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All Journal Indonesian Journal of Limnology Jurnal Manajemen, Akuntansi dan Logistik (JUMATI) LIMNOTEK
Riky Kurniawan
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science

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Flood Pulse and Aquatic Habitat Dynamics of The Sentarum Floodplain Lakes Area Hidayat Hidayat; Siti Aisyah; Riky Kurniawan; Iwan Ridwansyah; Octavianto Samir; Gadis Sri Haryani
Indonesian Journal of Limnology Vol. 1 No. 1 (2020): Indonesian Journal of Limnology
Publisher : Indonesian Society of Limnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (796.753 KB) | DOI: 10.51264/inajl.v1i1.2

Abstract

The Lake Sentarum is a complex of floodplain lakes in the middle part of the Kapuas River system in West Kalimantan, Indonesia. The area has a great ecological and economic importance, however, the Sentarum lakes complex and its catchment area are generally threatened by deforestation, fire, monoculture agroindustry, and pollution.The objective of this research is to establish the hydrological characteristics of the Sentarum lakes area and to reveal the dynamics of aquatic habitat resulted from changing water levels. Data were collected during our field campaigns of 2013-2017 representing the seasons. The water level was measured using a pressure sensor placed at the Lake Sentarum National Park resort, while rainfall data were obtained from the data portal of the Tropical Rainfall Measuring Mission. Inundation monitoring was carried out using a time-lapse camera. A hydrological model is used to simulate water levels beyond measurement period. Water quality and fish sampling were carried out at the lake area. Vegetation observation was carried out at the selected riparian zone of the lake area using the line transect method. Water level records show that the Sentarum floodplain lakes have two peaks of inundation period following the bimodal pattern of rainfall in the equatorial Kapuas catchment. This water level dynamics induced changes in water quality, nutrient availability, vegetation cover, and fish diversity found in the Sentarum lakes area. Despite its seasonal changes, water quality of Sentarum lakes is generally good and suitable for aquatic biota. Fish diversity of the Sentarum lakes is relatively higher during high water periods.
Sorption kinetics of heavy metals from aqueous solution using Spirogyra sp.: a microcosm study Evi Susanti; Mey Ristanti Widoretno; Dian Oktaviyani; Fajar Sumi Lestari; Nasrul Muit; Riky Kurniawan; Eva Nafisyah
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 29 No. 1 (2023)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2023.1190

Abstract

Understanding the mechanisms by which algae communities respond to disturbances in the lotic aquatic environment that is polluted by heavy metals is important, considering that algae is a biotic component of waters that acts as a producer in the aquatic food chain which has the potential to bio-magnify. This study examines the influence of time, biomass weight, heavy metal concentration, sorption capacity, and efficient removal on epilithic periphyton as a bio-accumulator of Cr, Pb, and Ni. The experiment was conducted on a laboratory scale using a canal system with a length and width of 1.2 and 1.0 meters, respectively. The canal system contains 132 L of water, has a 1.2 m2 substrate and periphyton area, a depth of 0.09 – 0.10 m, and a current flow rate of 0.04 – 0.06 m/s. The dissolved Cr6+ initial concentration in the medium was 1.64 mg/L, Pb2+ and Ni2+ concentrations were 1.4 mg/L, and the adsorption process was studied for 24 hours. Based on microscope observations and functional group interpretation utilizing infrared spectra (FTIR), the periphyton community is dominated by Spirogyra sp., which has hydroxyl (O-H), carboxyl (C-H), and carbonyl (C-C and C=O) functional groups with the ability to binding heavy metals. The remaining quantities of Cr, Pb, and Ni in water were 0.43 mg/L (removal 69.29%), 0.05 mg/L (96.43% removal), and 0.03 mg/L (97.86% removal). Periphyton has a maximal sorption capacity of 1.019 mg Cr/g, 1.97 mg Pb/g, and 1.92 mg Ni/g. The sorption kinetics of Cr, Pb, and Ni follow a pseudo-second-order model with k2 = 1.686 x 10-2 g/mg.min for Cr, 4.516 x 10-3 g/mg.min for Pb, and 2.259 x 10-2 g/mg.min for Ni, with R2 of 0.965 for Cr and 0.971 for Pb and 0.972 for Ni. Periphyton can potentially play a role as a bio-accumulator in lotic habitats, adsorbing Cr, Pb, and Ni ions, according to this study.
Organochlorine and pyrethroid residue in fish and sediment of Lake Singkarak, a tropical deep lake Ibrahim, Aiman; Muhamad Suhaemi Syawal; Asep Nugraha Ardiwinata; Sugiarti; Mohamad Awaludin Adam; Wathri Fitrada; Riky Kurniawan
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 29 No. 2 (2023)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2023.2084

Abstract

Agricultural activities still involve the use of synthetic pesticides to support the increase of their products. On the other hand, the use of synthetic pesticides such as organochlorines and pyrethroids may contribute to the decline of aquatic ecosystem health due to the accumulation of their residues in sediments and organisms. The current study aimed to assess the levels of organochlorine and pyrethroids pesticide residue in endemic fish and sediment from Lake Singkarak. Bilih fish and sediment samples were taken in June 2021 at ten (10) sampling sites in Lake Singkarak. The samples were extracted and analyzed by gas chromatography. Seven organochlorine compounds were measured, including aldrin, endrin, dieldrin, DDT, heptachlor, lindan, and endosulfan. Meanwhile, three compounds chosen from the pyrethroid group, cypermethrin, permethrin, and α-cypermethrin, were also measured. Four organochlorine compounds, aldrin, dieldrin, DDT, and endrin, were detected in bilih fish in three different sites. Dieldrin had the highest concentration at nd-0.007 mg/kg, followed by DDT, endrin, and aldrin. Meanwhile, in the sediments, no organochlorine compounds were detected from all observed sites. Pyrethroid compounds were detected in bilih fish at six sites. The compound with the highest concentration was permethrin (nd-0.02 mg/kg), followed by cypermethrin and α-cypermethrin. The surface sediment from three sites contained two pyrethroid residues, permethrin and α-cypermethrin, at nd-0.002 and nd-0.001 mg/kg, respectively. Our findings show that the residual levels of organochlorine and pyrethroid in bilih fish still meet the standards set by the Codex Alimentarius Commission (CAC). Nevertheless, Bilih fish accumulate more pesticide than surface sediment, so it is essential to be aware of their potential accumulation in the human body as the final consumer. Restriction on synthetic pesticide application is necessary to reduce its residue input into the lake waters for ecological and human health.
TANTANGAN DAN PELUANG DIGITAL PEMASARAN BANK SYARIAH DI ASIA TENGGARA riky kurniawan; muhamammad iqbal fasa
Jurnal Manajemen, Akuntansi dan Logistik (JUMATI) Vol. 2 No. 4 (2024): Jurnal Manajemen, Akuntansi, dan Logistik ( JUMATI )
Publisher : Cipta Kind Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The development of digital technology has significantly changed the landscape of the banking industry, including sharia banking in Southeast Asia. This research aims to identify the challenges and opportunities faced by Islamic banks in implementing digital marketing strategies. Through a comprehensive literature study, this research will analyze various factors that influence the success of Islamic bank digital marketing, such as regulations, competition, consumer behavior and technology adoption. It is hoped that the research results can contribute to the development of more effective digital marketing strategies for Islamic banks in the Southeast Asia region.
Bioremediation of Phenolic Pollutants by Fungi: A Perspective Melati, Irma; Miratul Maghfiroh; Nurul Setiadewi; Riky Kurniawan; Annisa Indah Pratiwi; Rosidah
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 31 No. 1 (2025)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2025.8074

Abstract

Phenol is a priority pollutant that poses a significant risk to human health and ecological systems when released into aquatic environments. Consequently, numerous technologies have been developed and implemented to remove phenol from wastewater. These technologies can be classified into physical, chemical, and biological techniques. While conventional treatment methods can effectively remove phenol, some are more economical and less environmentally beneficial. This overview, which is based on a collation of relevant and comprehensive literatures, emphasizes various phenolic pollutants in wastewater and how mycoremediation can be implemented to address these issues. Mycoremediation research has been chiefly directed on investigating the effects of various conditions on phenol degradation and evaluating its effectiveness under controlled experiments. Moreover, mycoremediation enables a doable solution for mitigating pollution, improving water quality, and supporting biodiversity in aquatic ecosystems. These also mean that advancing mycoremediation encourages environmentally sustainable practice. However, the remaining gaps exist in current research including the toxicity assessment of degradation by-products, the application of synthetic biology methods for chassis modification, creation and development of innovative immobilization methods, improvement of remediation efficiency by integration of multiple technologies and scalability of mycoremediation for practical wastewater treatments. These areas warrant further research to advance the greater potential of mycoremediation.
Co-Authors Annisa Indah Pratiwi Asep Nugraha Ardiwinata Dian Oktaviyani Eva Nafisyah Evi Susanti Fajar Sumi Lestari Gadis Sri Haryani Hidayat Hidayat Ibrahim, Aiman Iwan Ridwansyah Melati, Irma Mey Ristanti Widoretno Miratul Maghfiroh Mohamad Awaludin Adam Muhamad Suhaemi Syawal muhamammad iqbal fasa Nasrul Muit Nurul Setiadewi Octavianto Samir Rosidah Siti Aisyah Sugiarti Wathri Fitrada