Kana Puspita

The increase in greenhouse gas concentrations has intensified the impact of global warming. Oyster shell (OS) as a source of CaCO₃ has been considered as one of the methods to reduce CO₂, which is one of the primary contributors to global warming. Among various approaches, the adsorption...

Pantai Ulee Lheue adalah salah satu lokasi wisata bahari di Banda Aceh. Keindahannya selain menarik para pengunjung untuk menikmati keindahan pantai juga memiliki konsekuensi tumpukan sampah yang dibuang sembarangan oleh para pengunjung langsung ke bibir pantai yang berdampak pada kerusakan lingkungan. Selain masalah sampah, terdapat permasalahan lainnya yaitu dimana para pengunjung saat berwisata tidak mengindahkan anjuran pemerintah untuk menjaga jarak, menggunakan masker dan larangan berkumpul. Oleh karena itu, pengabdian ini berusaha untuk memetakan pengetahuan pengunjung wisata mengenai sampah dan dampaknya terhadap lokasi wisata dan kaitannya dengan bahaya Covid-19. Pengabdian ini menggunakan mixed method (kuantitatif dan kualitatif). Hasil survei menunjukkan bahwa pengunjung lokasi wisata memiliki pengetahuan yang cukup baik terkait dengan bahaya sampah dan Covid-19 namun belum terinternalisasi dalam tindakan sehari-hari. Sehingga, tim pengabdi memberikan edukasi melalui leaflet dan video di kanal Youtube, sehingga pengunjung dapat memiliki komitmen terhadap kebersihan lingkungan dan pelaksanaan protokol kesehatan di lokasi wisata.

: The growth of science in the twenty-first century, particularly in chemistry, is critically dependent on the integration of science and the Qur'an. Since numerous verses in the Qur'an disclose the fundamental principles of chemistry, such as the size of an atom, the integration of science and the Qur'an is nothing new in modern science, especially chemistry. As a result, this article will go into further detail regarding the atomic structure's physical setting and how it relates to Qur'anic verses. Writing this paper involved conducting literature searches on both contemporary science and Qur'anic interpretations of atomic structure. The word "dzarrah" appears in QS Az-Zalzalah verses 7-8, An-Nisa verse 40, and Yunus verse 61, and is interpreted as the size of a mustard seed that the human intellect may yet attain. However, "dzarrah" is often frequently interpreted as atomic size, since the atomic radius of the smallest atom (Hydrogen) and biggest atom (Organesson) atoms are 1.2 x 10^-10 m and 1.52 x 10^-10 m, respectively, with 1 million being smaller than the radius of mustard seed (5 x 10^-4 m). Thus, the word dzarrah, which is translated as the size of a mustard seed, is less proportional to describe a much smaller atomic size. This atomic scale later served as a precursor for new developments in chemical research, such as nanomaterials and quantum dots. Abstrak: Integrasi sains dan Al-Qur’an menjadi dasar yang penting untuk pengembangan ilmu sains pada abad ke-21, khususnya dalam ilmu kimia. Integrasi sains dengan Al-Qur’an sebetulnya bukanlah hal baru dalam sains modern, khususnya kimia, karena ada banyak ayat-ayat Al-Qur’an yang mengungkapkan tentang konsep dasar kimia, misalnya ukuran atom. Oleh karena itu, artikel ini akan membahas secara lebih jelas tentang konteks materi struktur atom dan kaitannya dengan ayat-ayat Al-Qur’an. Metode penulisan artikel ini menggunakan kajian literatur, baik itu dari segi sains modern dan tafsir Al-Qur’an tentang struktur atom. Kata “dzarrah” muncul dalam QS Az-Zalzalah ayat 7-8, QS An-Nisa ayat 40, dan QS Yunus ayat 61, yang ditafsirkan seukuran biji sawi yang ukurannya masih dapat dijangkau oleh pikiran manusia. Namun, “dzarrah” juga kerap diterjemahkan seukuran atom, padahal jari-jari 1 atom paling kecil (Hidrogen) dan paling besar (Organesson) berturut-turut adalah 1,2 x 10^-10 m dan 1,52 x 10^-10 m, dimana 1 juta lebih kecil dari jari-jari biji sawi (5 x 10^-4 m). Sehingga kata dzarrah yang diterjemahkan sebagai ukuran biji sawi kurang proporsional untuk menggambarkan ukuran atom yang jauh lebih kecil. Ukuran atom ini kemudian menjadi cikal bakal perkembangan penelitian di bidang kimia, misalnya nanomaterial dan quantum dots.

Rumoh Produksi Tiram di Desa Alue Naga, Banda Aceh, dengan didampingi oleh CV. Natural Aceh telah menjual ragam olahan produk dari tiram seperti kerupuk dan nugget tiram. Hasil pengolahan tiram meninggalkan limbah berupa cangkang tiram yang menjadi tumpukan sampah dan berdampak buruk pada lingkungan baik di darat maupun di perairan. Kelompok produksi tiram tersebut telah melakukan diversifikasi produk lebih lanjut untuk mengolah limbah cangkang tiram menjadi serbuk yang mengandung CaCO₃ dan bermanfaat sebagai adsorben serta dapat menjadi bahan baku pembuatan obat antisida. Produk tersebut bernilai komersil dan dapat dipasarkan namun masih terkendala dalam menentukan model bisnis. Oleh karena itu, pengabdian ini membantu memetakan model bisnis produk serbuk cangkang tiram dengan menggunakan Business Model Canvas (BMC). Target utama yang dicapai dari kegiatan pengabdian ini adalah adanya peta model bisnis produk serbuk cangkang tiram sehingga dapat menjadi konsep dan kerangka kerja acuan yang akan memudahkan pihak terkait dalam menjalankan bisnis produk serbuk cangkang tiram. Secara berkelanjutan, diversifikasi produk serbuk dari limbah cangkang tiram ini diharapkan dapat meningkatkan pendapatan masyarakat dan juga mengurangi dampak kerusakan lingkungan.

To prevent the serious threat of textile wastewater, researchers have developed adsorption-based wastewater treatment using cheap, yet effective, adsorbent materials. Of which is natural bentonite, that has the advantages for adsorption due to its porous structure and functional groups but still...

To further improve achievement of the given learning objectives, chemistry learning requires instructional materials that encourage active engagement of students. The goal of this research was to create student worksheets based on Peer Led Team Learning (PLTL) on colloid material, to establish the validity of student worksheets based on PLTL on colloid material, and assess teacher and student responses to worksheets. PLTL based students on colloid material that has been developed. This research approach is known as research and development (R&D), and it is carried out utilizing the 4D model (define, design, develop, and disseminate). Purposive sampling was used for the sample technique. The study was carried out at four schools: MAN 3, SMAN 5, SMAN 12, and SMAN 15 Adidarma Banda Aceh. Validating the practicality of student worksheets and questionnaire responses from teachers and students were used to obtain data. This study obtained the following results: (1) validation of the feasibility of student worksheets by expert validators of 92.3% and based on the chemistry teacher's assessment of 86.5% in the very good or valid category; (2) results of the teacher's responses to the students' worksheets obtained a percentage of 88.1% in the very good category; and (3) results of the students'responses to the students' worksheets obtained a percentage of 79.9% in the good category. Based on the findings, it is possible to infer that the student worksheet based on PLTL on colloid material is appropriate for use as teaching material on colloid material.

Development of drug delivery systems (DDS) has been widely carried out using safe biopolymers – starch and κ-carrageenan. However, for optimal use, the foregoing polymers still suffers from mechanical weakness. Combining both polymers could enhance the properties of each of the polymer. This research aimed of improving the applicability of starch and κ-carrageenan as DDS by means of polyelectrolyte complexation to form a polymer film. The composition ratio of starch:κ-carrageenan was optimized using response surface method (RSM) on Design Expert 11.0 based on water swelling, tensile strength, and disintegration time of the film. Fourier transform infrared spectrometry was performed on the prepared starch—κ-carrageenan film and suggested the successful film preparation. The bulk characteristics of the film are dependent on the starch or κ-carrageenan composition ratio, where starch has been associated with higher thickness, while κ-carrageenan — rigidity. From the RSM, the optimized composition was revealed to be 2.95 and 2.84 g for starch and κ-carrageenan, respectively, in a 60 mL aqueous solvent. The predicted optimum properties of the film were 160.21%, 3.26 MPa, and 17.47 min for swelling degree, tensile strength, and disintegration time, respectively. Taken altogether, the characteristics of starch or κ-carrageenan individually could be modified by polymeric combination, where they could be optimized by means of RSM.

Global threat from emerging contaminants to human health has pushed researchers to develop pollutant removal technologies including those based on biocatalytic degradation. Laccase, a multicopper enzyme, is reported for its applicability in treating wastewater and industrial effluent by catalyzing reduction of O₂ to H₂O in the presence of substrates (phenolic or non‐phenolic compounds). Scientific papers have discussed the ability of this enzyme to breakdown hazardous contaminants ranging from azo dyes, antibiotics, and up to hormones. Nonetheless, the cost production of this enzyme is high, hence the importance of the immobilization into solid supports. Polymers are considered suitable for the immobilization because they are easy for modification and have adjustable characteristics. This review discusses the immobilization of laccase into polymers via various techniques (adsorption, cross‐linking, covalent binding, encapsulation, and entrapment) and its implications on the pollutant removal performance. In addition, bibliometric analysis is performed and summarized the advantages and disadvantages of each immobilization technique.