Garuda - Garba Rujukan Digital

Characterization Of Pure and Immobilized Invertase Enzyme Using Activated Carbon Dahlia Rosma Indah; Husnul Hatimah
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.8150

This research is conducted to determine the optimum pH, the optimum temperature, the optimum incubation time, Km and Vmaks enzym invertase mobile and immobile. The research variable are the characteristic of enzym invertase mobile and immobile that include the optimum pH, the optimum temperature, the optimum incubation time, Km, Vmaks and the activity of enzym. The instrument of the research is spectronic UV-Vis. The result of the research are absorbance value and henceforth that will be substituted into the similarity of standart liquid invert sugar in regretion curva, from this procedure the researcher find the concentration’s product (invert sugar). This concentration value will be used for determining enzym activities. The data are collected then analyzed by using descriptive method that use a corelation graph between enzym activity and research variable.The result of the research shows that enzym invertase mobile have optimum pH 4.5, optimum temperature 55°C; optimum incubation time 25 minute; Km value 1,279 mg/mL (4,737 x 10-6 mol/L) and Vmaks value 23,256 mg/mL/menit. The enzym invertase immobile have optimum pH 4; optimum temperature 60°C; optimum incubation time 30 minute; Km value 2,255 mg/mL (8,352 x 10-6 mol/L) and Vmaks value 19,608 mg/mL/minute.

Mercury Metal Absorption using Ethylene Diamine Tetraacetic Acid Intercalated Carbon Dahlia Rosma Indah; Husnul Hatimah
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 5 (2023): October 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i5.10097

Silver craft waste contains hazardous metals, one of which is mercury metal. If high concentrations of mercury waste are disposed of without treatment, this waste seeps into the soil and pollutes residential water sources because mercury metal is difficult to decompose. Mercury poisoning can cause nerve reactions such as difficulty speaking, blurred vision, muscle weakness, paralysis, impaired sense of taste, and shortness of breath. This research was conducted as an effort to reduce mercury metal levels in silver craft waste in Central Lombok Regency. The method of waste treatment is by adsorption method utilizing carbon bagasse modified with EDTA. The first step is to first determine the level of mercury metal in silver craft wastewater in Central Lombok. Furthermore, wastewater is contacted with EDTA-intercalated bagasse carbon. Making intercalated carbon bagasse consists of 3 stages, namely first dehydration by burning bagasse until it turns into carbon, second carbonation is heating temperature 500ºC, carbon results are sifted 100-200 mesh and third, intercalation is by soaking 100 grams of carbon in 250 mL EDTA solution 10% stirred for 6 hours. After that the carbon is dried at a temperature of 50ºC. A total of 2 grams of intercalated bagasse carbon that has been made is put into 25 mL of wastewater samples. The sample was stirred at contact time variations of 30, 60, 90, 120 and 150 minutes using a stirer. The optimum time obtained is used to calculate the efficiency of reducing mercury metal levels, namely calculating the difference in mercury metal levels before adsorption and after adsorption using EDTA intercalated carbon baggase. Mercury metal levels were analyzed using an Atomic Absorption Spectrophotometer (SSA). From the study, it was found that the mercury metal content in the sample was 50.6398 ppb. The optimum contact time in mercury metal adsorption is at a contact time of 120 minutes which results in an optimum adsorption efficiency in mercury metal of 70.55%.

Pengaruh penambahan media limbah jamur merang dalam pupuk organik cair terhadap konsentrasi kaslium Putri, Yuli Anggraini; Hulyadi, Hulyadi; Indah, Dahlia Rosma
Empiricism Journal Vol. 1 No. 1: June 2020
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/ej.v1i1.264

Pupuk organic cair merupakan pupuk yang berupa larutan dari hasil pembusukan bahan-bahan organik. Kombinasi whey tahu dan limbah jamur merang dengan penambahan starter mikroorganisme lokal (MOL) dapat diolah menjadi pupuk organik cair mengandung makro nutrient Kalium (K-total). Tujuan penelitian ini untuk mengetahui kandungan kalium optimum pada pupuk organik cair whey tahu dengan penambahan limbah jamur merang dan mikroorganisme lokal (MOL). Metode penelitian ini menggunakan penelitian eksperimen di laboratorium dengan menggunakan metode Rancangan Acak Lengkap (RAL) dengan dua: faktor 1 massa limbah jamur merang (Limbah jamur merang lama 600 gr dan limbah jamur merang baru 600 gr) dan faktor 2 volume pupuk organik cair (masing-masing 1L). Hasil penelitian menunjukkan bahwa kandungan K-total tinggi terdapat pada perlakuan POC + LB yaitu 1,05%.The effect of the addition of mushroom waste media in liquid organic fertilizer to the concentration of cassavaÂ AbstractLiquid organic fertilizer is a fertilizer in the form of a solution from the decay of organic matter. The combination of whey tofu and mushroom waste with the addition of local microorganism starter (MOL) can be processed into liquid organic fertilizer containing macro-nutrient potassium (K-total). The purpose of this study was to determine the optimum potassium content in the liquid organic fertilizer of whey tofu with the addition of mushroom waste and local microorganisms (MOL). This research method used experimental research in the laboratory using the Completely Randomized Design (CRD) method with two: a factor of 1 mass of mushroom waste (600 gr old mushroom waste and 600 gr new mushroom waste) and a factor of 2 volume of liquid organic fertilizer (each -Each 1L). The results showed that the high total K content found in the POC + LB treatment was 1.05%.

PELATIHAN PEMBUATAN PUPUK ORGANIK CAIR BAGI GURU DAN SISWA SMAN 08 MATARAM Hulyadi, Hulyadi; Ahmadi, Ahmadi; Khery, Yusran; Hatimah, Husnul; Indah, Dahlia Rosma; Hendrawani, Hendrawani
Abdi Masyarakat Vol 3, No 1 (2021)
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/abdi.v3i1.2346

kegiatan pengabdian kepada masyarakat ini bertujuan untuk menambahkan kreativitas guru dalam melihat permasalahan lingkungan disekitar sekolah. Salah satu permasalahan yang dihadapi guru di SMAN 08 Mataram aroma tidak sedap dari limbah pengolahan tahu, limbah organik dari daun-daun pepohonan yang ada disekitar sekolah dan. Limbah cair yang terbuang secara langsung keparit sekitar sekolah menimbut aroma tidak enak. Aroma ini menyebabkan siswa terganggu dalam melakukan proses kegiatan belajar. Dibutuhkan teknologi untuk mengatasi masalah tersebut. Pengolahan limbah menjedi pupuk organik cair menjedi salah satu solusi untuk menjawab permasalahan tersebut. Pembuatan pupuk organik membutuhkan mikroorganisme untuk menguraikan bahan organik menjadi mineral yang lebih mudah diserap oleh tanaman. Metode kegiatan berupa pelatihan kemudian dilanjutkan dengan pembautan starter dari limbah buah dan bahan organik yang kaya dengan mineral yang ada dilingkungan sekitar sekolah. Berdasarkan hasil evaluasi guru dan siswa menunjukkan antusias yang besar terbukti semua siswa mengikuti kegiatan sampe selesai. Banyaknya pertanyaan dari guru dan siswa bagaimana aplikasinya lebih lanjutnya terhadap tanaman juga merupakan bukti ketertarikan guru dan siswa untuk mengaplikasikan pupuk yang akan dibuat. Guru dan siswa berharap kegitan ini bisa dilanjutkan proses pengabdian ini bisa diintegrasikan dalam pembelajaran IPA untuk mengsilkan proses pembelajaran yang lebih bermakna.

Pelatihan Karya Tulis Ilmiah Bagi Mahasiswa Program Studi Pendidikan Kimia Undikma Safitri, Baiq Rina Amalia; Pahriah, Pahriah; Hatimah, Husnul; Indah, Dahlia Rosma; Suryati, Suryati
Abdi Masyarakat Vol 3, No 2 (2021)
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/abdi.v3i2.2687

Karya ilmiah sebagai salah satu elemen penting dalam proses perkuliahan terkadang masih dianggap momok oleh sebagian mahasiswa. Hal tersebut terjadi karena banyaknya elemen-elemen penting yang harus diperhatikan mahasiswa. Adapun karya ilmiah yang dimaksud adalah makalah, laporan penelitian, skripsi, dan lain sebagainya. Beberapa jenis karya tersebut tentu harus dibuat oleh mahasiswa yang sedang menjalani masa perkuliahan. Namun, karya ilmiah yang seharusnya dibuat dengan aturan-aturan baku dan tidak copy paste. Berangkat dari hal tersebut, diperlukan pelatihan untuk memberikan pemahaman kepada mahasiswa terkait penulisan akademik. Beberapa persoalan yang ditemukan pada mitra terdiri dari: Kesulitan menemukan ide, kurangngnya pengetahuan bagaimana mencari referensi yang tepat dalam menulis, dan kurangnya pengetahuan bagaimana cara parafrase kalimat yang dikutipnya sehingga terhindar dari plagiat. Tujuan dari kegiatan pengabdian ini adalah: (1) meningkatkan wawasan pengetahuan bagi mahasiswa tentang pentingnya menulis karya tulis ilmiah; (2) meningkatkan wawasan kemampuan bagi mahasiswa tentang teknik dan tatacara menulis karya ilmiah; (3) memberikan wawasan pengetahuan bagi mahasiswa tentang pentingnya peningkatan kualitas dan kuantitas karya ilmiah; (4) meningkatkan wawasan pengetahuan bagi mahasiswa tentang aplikasi parafrase dan aplikasi plagiat karya tulis ilmiah; (5) meningkatkan pengetahuan bagaimana mendapatkan situs-situs yang bisa digunakan untukan untuk mendownload buku secara gratis. Kegiatan penyusunan artikel ilmiah dilakukan selama 3 bulan dengan 12 kali pertemuan secara online melalui WA Group untuk diskusi dan presentasi dilaksanakan dengan menggunakan google meet dengan jumlah peserta sebanyak 15 mahasiswa. Hasil kegiatan ini adalah: Mahasiswa program studi pendidikan kimia bisa menuangkan ide yang ada dalam pikirannya dan mahasiswa mempunyai pengetahuan bagaimana cara mendownload buku secara gratis, Mahasiswa berhasil melakukan parafrase kalimat dalam menulis karya ilmiah sehingga terhindar dari plagiasi. Keberhasilan ini juga ditunjukkan dengan dihasilkannya 15 naskah proposal yang sudah disesuaikan dengan template skripsi FSTT UNDIKMA.

Kinetics of Tofu Pulp as Copper Metal Adsorbent on the Waste of the Silver Craft Industry Indah, Dahlia Rosma; Hatimah, Husnul
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.12462

Liquid waste originating from the silver crafts industry is heavy metal waste that is dangerous for the surrounding environment, one of which is copper (Cu). Copper is a heavy metal that can have toxic effects on human health. Based on these problems, processing is needed to reduce the pollutants produced. One of the technologies used is adsorption using a natural adsorbent that is efficient and easy to obtain, namely tofu dregs. Adsorption using tofu dregs is because tofu contains protein. This protein has the ability to absorb amino acids which form two charged ions (zwitter ions). Toxic metals can be bound to proteins as metallothionein. This research aims to determine the efficiency of using tofu dregs as an absorbent for copper metal (Cu) and to determine the effect of contact time and adsorption isotherms on copper metal adsorption. 1 gram of tofu dregs was used with 25 ml of waste and then contacted with a magnetic plate stirrer at varying times of 30, 60, 90, 120 and 150 minutes. The concentrations of all copper metals were analyzed using an Atomic Absorption Spectrophotometer. Next, each copper metal content was calculated using a copper metal standard calibration curve. Identification using an Infrared Spectrophotometer showed that the tofu dregs waste in this study contained the functional groups -OH, N-H (stretching), C-H (aliphatic), C=O, -OH (bending vibration), and C-O. From the research it was found that the copper metal content in the sample was 19.5979 ppm. The optimum contact time for copper metal adsorption is 120 minutes, which results in an optimum adsorption efficiency for copper metal, namely 54.88%. The isotherm equation that corresponds to the adsorption of copper metal using tofu dregs waste is the Freundlich isotherm with a Kf value of 0.072 L/g and a 1/n value of 2.366. This shows that the adsorption of copper metal occurs in a multilayer layer on the surface of the tofu dregs adsorbent, which illustrates the occurrence of physical adsorption. Tofu dregs waste is an effective adsorbent for reducing copper metal levels in silver craft waste.

Absorption of Metal Ions and Dyes in Liquid Waste : A Literature Review Indah, Dahlia Rosma; Afriani, Aulia; Nurwahidah, Nurwahidah
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13823

Industrial development and population growth cause a lot of waste to enter water bodies, causing pollution. A number of studies have been carried out to remove metal ions and dyes in waters. Adsorption is the most widely used method to absorb heavy metal ions and harmful dyes by utilizing natural resources that are still abundant, for example, agricultural, livestock, and fishery waste. Adsorption can also use activated or modified absorbent materials to increase porosity and expand the surface plane. In this review, the adsorption method and results obtained by the researcher with various absorbent materials are summarized which are mostly carried out in the last ten years. The purpose of this review is to provide input in finding alternatives to other absorbent materials or eliminating pollutants harmful to human health and the environment.

Pengenalan Teknologi Filtrasi Bertekanan Ultra Rendah kepada Santri Pondok Pesantren Ad-Diinul Qayyim Kabupaten Lombok Barat Ahmadi, Ahmadi; Nufida, Baiq Asma; Indah, Dahlia Rosma; Bilad, Muhammad Roil; Khery, Yusran; Harisanti, Baiq Muli; Ariani, Dwi; Mesarah, Siti; Astuti, Mei Dwi; Rahma, Arinda Yusfika; Suhartini, Sriyanti
Nuras : Jurnal Pengabdian Kepada Masyarakat Vol. 2 No. 4 (2022): October
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Water treatment training using ultra-low pressure membrane filtration devices at the Ad-Diinul Qayyim Islamic Boarding School, Gunungsari Village, Gunungsari District, West Lombok Regency is an activity that aims to downstream the innovations of lecturers and students in higher education to the community, and increase public awareness about use of clean water. This activity was carried out with the stages of making a prototype filtration device, debriefing students, coordinating and socializing, implementing training, monitoring, and evaluating. The activity was carried out in the Hall of the Ad-Diinul Qayyim Islamic Boarding School and involved 30 students as participants. Activities were monitored using a training participant response questionnaire. The monitoring results showed that 86.67% of the participants understood how to use and maintain the prototype ultra-low pressure membrane filtration device. As many as 82.25% of participants agreed that learning about filtration equipment was very interesting to present in science learning. As many as 73.33% of participants agreed that the prototype of the filtration device was easy to develop.

Pelatihan Pembuatan Produk Kimia Rumah Tangga di MA Darul Habibi NW Paok Tawah Praya Ratna Azizah Mashami; Dahlia Rosma Indah; Husnul Hatimah; Citra Ayu Deewi; Pahriah Pahriah
Jurnal Pengabdian UNDIKMA Vol. 1 No. 1 (2020): May
Publisher : LPPM Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jpu.v1i1.2712

The purpose of this community service to provide an understanding that chemistry is fun, provide skills in making chemical products that are commonly used in everyday life, and increase student motivation in learning chemistry at MA Darul Habibi NW Paok Tawah Praya. The method used was demonstration, practice, and discussion, with training and mentoring approaches. Student responses to training were obtained from a questionnaire. The results of the questionnaire analysis showed 100% of students stated the material presented was easy to understand and the method used was fun, 90% of students stated that before training the chemistry lessons were not fun, 100% of students stated that chemistry lessons were fun after attending training, 83.3% of students were motivated to learning chemistry after attending training, 80% of students saw business opportunities and 73.3% of students wanted to try entrepreneurship through household chemical products. The training succeeded in changing students' views in a positive direction significantly.

Kinetics of Tofu Pulp as Copper Metal Adsorbent on the Waste of the Silver Craft Industry Indah, Dahlia Rosma; Hatimah, Husnul
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.12462

Liquid waste originating from the silver crafts industry is heavy metal waste that is dangerous for the surrounding environment, one of which is copper (Cu). Copper is a heavy metal that can have toxic effects on human health. Based on these problems, processing is needed to reduce the pollutants produced. One of the technologies used is adsorption using a natural adsorbent that is efficient and easy to obtain, namely tofu dregs. Adsorption using tofu dregs is because tofu contains protein. This protein has the ability to absorb amino acids which form two charged ions (zwitter ions). Toxic metals can be bound to proteins as metallothionein. This research aims to determine the efficiency of using tofu dregs as an absorbent for copper metal (Cu) and to determine the effect of contact time and adsorption isotherms on copper metal adsorption. 1 gram of tofu dregs was used with 25 ml of waste and then contacted with a magnetic plate stirrer at varying times of 30, 60, 90, 120 and 150 minutes. The concentrations of all copper metals were analyzed using an Atomic Absorption Spectrophotometer. Next, each copper metal content was calculated using a copper metal standard calibration curve. Identification using an Infrared Spectrophotometer showed that the tofu dregs waste in this study contained the functional groups -OH, N-H (stretching), C-H (aliphatic), C=O, -OH (bending vibration), and C-O. From the research it was found that the copper metal content in the sample was 19.5979 ppm. The optimum contact time for copper metal adsorption is 120 minutes, which results in an optimum adsorption efficiency for copper metal, namely 54.88%. The isotherm equation that corresponds to the adsorption of copper metal using tofu dregs waste is the Freundlich isotherm with a Kf value of 0.072 L/g and a 1/n value of 2.366. This shows that the adsorption of copper metal occurs in a multilayer layer on the surface of the tofu dregs adsorbent, which illustrates the occurrence of physical adsorption. Tofu dregs waste is an effective adsorbent for reducing copper metal levels in silver craft waste.

Title

Found 36 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 36 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 36 Documents
Search