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A REVIEW: FACILE AND GREEN SYNTHESIS OF MARINE MACROALGAE AND ITS PHOTOCATALYTIC PERFORMANCE ON POLLUTED WATER REMEDIATION ., Ramadhani; Said, Ahmad
Journal of Aquatropica Asia Vol 9 No 1 (2024): Journal of Aquatropica Asia
Publisher : Jurusan Akuakultur, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/joaa.v9i1.5245

This review critically examines the burgeoning field of research focused on the environmentally benign synthesis of metallic nanoparticles exploiting the unique properties and diverse array of marine macroalgae species. Harnessing macroalgal biomolecules as reductants and stabilizers, numerous findings have discovered the biosynthesis of silver, gold, iron oxide, zinc oxide, and other nanoparticles through a sustainable "phycosynthesis" technique without toxic chemicals. Extensively characterized for their morphologies and properties, these algae-mediated nanoparticles exhibit notable photocatalytic activities in degrading various organic dyes and pollutants. Particularly, over 90% degradation efficiency has been achieved for dyes like methylene blue, methyl orange, and rhodamine B utilizing nanoparticles produced from macroalgae such as Sargassum horneri, Syringodium isoetifolium and Ulva lactuca. The mechanism is hypothesized to involve photoexcitation generating reactive oxidative species on the nanoparticle surface that rapidly cleave dye molecules. Improved understanding of the roles of macroalgal biomolecules and optimization of synthesis conditions may enable enhanced catalytic performances. With their widespread availability and biodiversity remaining largely untapped, marine macroalgae prove promising as renewable resources for developing eco-friendly water remediation technologies through metal/metal oxide nanocatalyst design.

Microbially Induced Calcium Carbonate Precipitation as Bio-Mimetics Material in Applications of Slashing Carbon Emission and Carbon Sequestration: A Review Ramadhani, Ramadhani; Said, Ahmad
Cipasung Techno Pesantren: Jurnal Ilmiah Vol 18 No 1 (2024): Cipasung Techno Pesantren: Scientific Journal
Publisher : LPPM Sekolah Tinggi Teknologi Cipasung

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Concrete production contributes radically to global carbon dioxide emissions. Microbially induced calcium carbonate precipitation (MICP) is an evolving technology that allows calcium carbonate to be precipitated on concrete through microbial metabolic activity. This review paper aims to present an overview of contemporary findings on the solicitation of MICP for advancing the properties of concrete, reducing carbon emissions from cement production, and elevating carbon sequestration. The results of previous studies have expounded that MICP treatment can enhance the compressive strength, stiffness, and durability of concrete. More importantly, MICP technology propounds the potential to moderately supersede cement content in concrete, thereby lowering carbon emissions from cement production. The microbial precipitated calcium carbonate may also accelerate the sequestration of carbon dioxide. While more research is still needed, MICP shows capacity as a sustainable technique for developing low-carbon concrete materials.

Bank Indonesia's Strategy in Accelerating Sharia Economic Growth Said, Ahmad; Susanto, Eko
Journal of Islamic Economy Vol. 1 No. 3 (2024): NOVEMBER-JOIE
Publisher : Pt. Anagata Sembagi Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62872/1p7ps815

Seconomy has become an integral part of the Indonesian economic system, especially after the implementation of policies that support the sustainability of this sector. In an effort to accelerate the growth of the sharia economy, Bank Indonesia (BI) plays an important role with various strategic policies implemented to strengthen this sector. The strategies implemented by BI not only include monetary policy, but also financial inclusion, development of the sharia capital market, and strengthening of sharia financial institutions. This study aims to explore more deeply the efforts of Bank Indonesia in encouraging the development of the sharia economy and its impact on overall economic growth. The research method used in this study is a qualitative descriptive approach with analysis of literature studies and relevant secondary data. Based on the analysis conducted, the strategies implemented by Bank Indonesia have proven effective in increasing the contribution of the sharia economy sector to Indonesia's Gross Domestic Product (GDP). Bank Indonesia, through comprehensive policies, provides significant impetus for the growth of the sharia economy, both in terms of macroeconomic policies and the real sector.

A REVIEW: FACILE AND GREEN SYNTHESIS OF MARINE MACROALGAE AND ITS PHOTOCATALYTIC PERFORMANCE ON POLLUTED WATER REMEDIATION ., Ramadhani; Said, Ahmad
Journal of Aquatropica Asia Vol 9 No 1 (2024): Journal of Aquatropica Asia
Publisher : Program Studi Akuakultur, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/joaa.v9i1.5245

This review critically examines the burgeoning field of research focused on the environmentally benign synthesis of metallic nanoparticles exploiting the unique properties and diverse array of marine macroalgae species. Harnessing macroalgal biomolecules as reductants and stabilizers, numerous findings have discovered the biosynthesis of silver, gold, iron oxide, zinc oxide, and other nanoparticles through a sustainable "phycosynthesis" technique without toxic chemicals. Extensively characterized for their morphologies and properties, these algae-mediated nanoparticles exhibit notable photocatalytic activities in degrading various organic dyes and pollutants. Particularly, over 90% degradation efficiency has been achieved for dyes like methylene blue, methyl orange, and rhodamine B utilizing nanoparticles produced from macroalgae such as Sargassum horneri, Syringodium isoetifolium and Ulva lactuca. The mechanism is hypothesized to involve photoexcitation generating reactive oxidative species on the nanoparticle surface that rapidly cleave dye molecules. Improved understanding of the roles of macroalgal biomolecules and optimization of synthesis conditions may enable enhanced catalytic performances. With their widespread availability and biodiversity remaining largely untapped, marine macroalgae prove promising as renewable resources for developing eco-friendly water remediation technologies through metal/metal oxide nanocatalyst design.

Pelatihan Penguatan Pendidikan Karakter Remaja Upaya Pencegahan Penggunaan Narkoba Di Karang Taruna Karet Setia Budi Maududi, Mukhlish Muhammad; Rahman, Nurlina; Said, Ahmad
Jurnal Pelayanan dan Pengabdian Masyarakat (Pamas) Vol 9, No 1 (2025): Jurnal Pelayanan dan Pengabdian Masyarakat (PAMAS)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM Universitas Respati Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52643/pamas.v9i1.2359

Character education can be interpreted as ethics education, moral education, value education, character education, which aims to develop students' abilities in determining good and bad, maintaining what is good, and applying these good in everyday life. The purpose of implementing this Community Service is to increase Partners' knowledge about Character Education so that it can become a stronghold in the person of each participant to dare to refuse invitations to use Narcotics. The implementation method in this counseling activity uses face-to-face and still pays attention to health protocols with the capacity of counseling participants around 15 participants of the Management and Members of Karang Taruna Kelurahan Karet, Setia Budi District, South Jakarta. From the results of the Community Service Program activities, results were obtained based on the Post-test , there was an increase in knowledge of the dangers of narcotics and sanctions for users and dealers and an increase in knowledge of character education.

Climate Classification, Hydrological, Agricultural, and Assessment of Climate Change Impacts Analysis in City of Pangkalpinang, Bangka Belitung Island Province, Indonesia Ramadhani; Said, Ahmad
Cipasung Techno Pesantren: Jurnal Ilmiah Vol 19 No 1 (2025): Vol. 19 No. 1 (2025): Cipasung Techno Pesantren: Scientific Journal
Publisher : LPPM Sekolah Tinggi Teknologi Cipasung

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This study assessed climate classification, hydrological conditions, and agricultural vulnerabilities in Pangkalpinang City, Bangka Belitung Province, Indonesia, using a 65-year (1959-2024) daily meteorological dataset. Climate classification revealed a dominant Af (Tropical Rainforest) type by the Köppen-Geiger method (occurring in 56 out of 66 years) with high precision (0.89-1.0) and a C1'As (perhumid mesothermal) classification predominating according to Thornthwaite (64 out of 66 years). Trend analysis showed a likely not significant temperature increase (approximately +0.02°C/year) and shifting precipitation patterns, with mean annual rainfall at 2289.84 mm and an annual precipitation concentration index (PCI) of 8.924, indicating a moderately irregular rainfall distribution. Hydrological analysis showed an average potential evapotranspiration (PET) of 0.284 mm, a soil moisture content of 99.751 mm, an average surface runoff of 4.577 mm, and 51 annual flood risk events, exhibiting a humid regime. Mean crop water requirement (CWR) was 4.857 relative units, and we observed a strong positive correlation (r=0.969) between the water requirement satisfaction index (WRSI) and crop water needs. The model validation exhibited a root mean square error (RMSE) between 0.1-0.5 and showed a stable Thornthwaite classification even with perturbations and the time series data analysis revealed the variability of parameters and a shift in temperature around the year 2000. These results emphasize the urgent need for localized climate adaptation strategies in Pangkalpinang.

Harvesting Sustainability: Transforming Rice Straw Wastes into Eco-Friendly Silica Gel Said, Ahmad; Aprisilia Risky Wijaya; Gazali Majid; Dede Ulfah; Ramadhani; Musawwa, Muhammad Miqdam
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 9 No. 1 (2024): Volume 9, ISSUE 1,2024
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol9.iss1.art1

The vast quantities of rice straw residue generated every year present both a challenge and an opportunity. To address the challenge, this work took the opportunity by transforming rice straw waste into eco-friendly silica gel. Synthesis of rice straw-based silica gel was via sol-gel method with the calcination temperature of 700 oC for 2 h and the addition of sodium hydroxide 2 molar. Characteristics of silica gel and its raw material have been investigated using several techniques such as FTIR, XRD, SEM, and BET surface area. The synthesized silica gel showed obvious peaks of Si-O-Si and O-H, aggregated smaller particles, crystal nature, and high surface area. This innovative work contributes to agricultural waste management and the circular economy for a sustainable future.

Potential of Marine Macroalgae in Stabilizing Bio-Fabricated Nanoparticles for Photodegradation Application: A Review Ramadhani, Ramadhani; Said, Ahmad
CONSERVA Vol 2 No 1 (2024): CONSERVA : Jurnal Konservasi Sumber Daya Alam dan Lingkungan
Publisher : Unmuh Babel Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35438/conserva.v2i1.205

Marine macroalgae, or seaweeds, have emerged as promising sources for the green synthesis and stabilization of nanoparticles, offering remarkable potential in photodegradation processes. These abundant and renewable resources harbor a diverse array of bioactive compounds, including polysaccharides, proteins, flavonoid, and pigments, which can act as reducing, capping, and stabilizing agents. The integration of macroalgae-derived stabilizing agents into nanoparticle synthesis confers unique properties, enhancing photocatalytic performance and stability. This review comprehensively examines the role of marine macroalgae as stabilizing agents for bio-fabricated nanoparticles in photodegradation applications in particular for toxic azo dye degradation and organic compounds. It explores into the mechanisms of nanoparticle synthesis and stabilization, explores the diverse macroalgal species employed, and evaluates their photocatalytic efficiency against various organic and inorganic pollutants in wastewater. Furthermore, the review critically analyzes the challenges and future perspectives in this field, offering insights into the development of green, sustainable, and efficient remediation strategies for environmental contaminants.

Analysis of Potable Water Quality in Densely Populated Residential Environments (Case Study in Condongcatur Village) Said, Ahmad; Suharno; Biyanti, Shupynur; Sapitri
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Volume 8, ISSUE 1, 2023
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol8.iss1.art7

Yogyakarta is a densely populated province in Indonesia. In order to maintain the comfort and health of the people of Yogyakarta, this study aims to analyze the quality of drinking water sources used by residents of Depok District with a population density of 3691.76 people/km2 in 2021, by taking water samples in Condongcatur Housing. The research was conducted by water intake survey method and testing experiments based on SNI No. 01-3554-2006 through test parameters of odor, taste, turbidity, pH, TDS, nitrite, nitrate, chloride, iron, and manganese levels. Based on the results of organoleptic and instrumental testing, the tested water samples were found to have met the quality standards set by PERMENKES RI No.492/MENKES/PER/IV/2010. Thus, the source of drinking water used by Condongcatur residents has met the required qualifications. This may be because local residents were able to maintain their water quality from human activities that can pollute the water quality. Nevertheless, water quality must always be maintained at all times considering the population in the area is increasing. Keywords: Water, drinkable water quality, populated residential environment

Deindividuasi dan Kontrol Diri Terhadap Perilaku Perundungan di Media Sosial Instagram Pada Remaja Said, Ahmad
Psikoborneo: Jurnal Ilmiah Psikologi Vol 9, No 4 (2021): Psikoborneo: Jurnal Ilmiah Psikologi
Publisher : Program Studi Psikologi, Fakultas Ilmu Sosial dan Ilmu Politik, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/psikoborneo.v9i4.6433

Penelitian ini bertujuan untuk menguji secara empirik ada atau tidaknya pengaruh deindividuasi dan kontrol diri terhadap perilaku perundungan di media sosial instagram. Penelitian ini menggunakan pendekatan kuantitatif. Subjek penelitian ini adalah remaja sebanyak 86 orang. Teknik sampel yang digunakan adalah purposive sampling, dengan karakteristik responden berusia 13-18 tahun, memiliki kecendrungan perilaku perundungan di media sosial, memiliki akun di media sosial instagram dan aktif menggunakan media sosial instagram. Alat ukur dalam penelitian ini menggunakan skala perundungan di media sosial, skala deindividuasi dan skala kontrol diri. Skala tersebut disusun dengan skala model likert. Teknik analisa data menggunakan uji regresi berganda. Hasil dari penelitian ini menunjukan bahwa terdapat pengaruh deindividuasi dan kontrol diri terhadap perilaku perundungan di media sosial instagram dengan nilai signifikansi p = 0.000, F hitung 11.519 > F tabel = 3.110 dan nilai R2 = 0.217. Pada deindividuasi terhadap perundungan di media sosial terdapat pengaruh dengan nilai koefisien beta (β) = 0.461, nilai t hitung = 4.743 > t tabel = 1.989 dan nilai p = 0.000. Pada kontrol diri terhadap perundungan di media sosial tidak terdapat pengaruh dengan nilai koefisien beta (β) = 0.052, nilai t hitung= 0.534 < t tabel = 1.989 dan nilai p = 0.595. This research is aimed to examined empirically the presence or absence of deindividuation and self-control on job insecurity in instagram. This research used quantitative approach. The subject of this research was teenagers, with a total of 86 people. The sample technique used was purposive sampling, with the characteristics of respondents aged 13-18 years, tend to cyberbulling, have an account on social media Instagram and actively use social media Instagram. The measurement instruments used in this research were cyberbullying scale, deindividuation scale, and self-control scale. The scale was arranged with likert scale design. The technique of data analysis used was multiple regression test. The result of this research showed that the existence of regression of of deindividuation and self-control on job insecurity in instagram with p significance value = 0.000, F count 11.519 > F table = 3.110 and R2 value = 0.217. On deindividuation toward cyberbullying there was regression with the value of coefficient beta (β) = 0.461, t count value = 4.743 > t table = 1.989 and p value = 0.000. On readiness for change toward job insecurity there was regression with the value of coefficient beta (β) = 0.052, t count value= 0.534 < t table = 1.989 and p value = 0.595.

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