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All Journal Jurnal Sumberdaya Alam dan Lingkungan The Journal of Pure and Applied Chemistry Research Jurnal Fisika Unand SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Nusantara Science and Technology Proceedings
Dyah Suci Perwitasari, Dyah Suci
UPN Veteran Jawa Timur Jl. Raya Rungkut Madya Gunung Anyar, Surabaya
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Biosorption of Total Chrome Metals on Leather Tannery Liquid Waste Using Tofu Dregs Pangestu, Muhammad Aji; Pracesa, Yahya Ardian Yuma; Perwitasari, Dyah Suci
Nusantara Science and Technology Proceedings 1st International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2020.0531

Abstract

Chrome metal was the main element in tannery liquid waste. Chrome was included in B3 waste and has the potential to destructed or contaminated surroundings. The use of natural material as an adsorbent medium for b3 heavy metal currently was being studied. Tofu dregs were an alternative that can be used as biosorbent. This study's aim was to adsorbed total chrome metal in tannery liquid waste. The operating conditions took place at a pH of 7 and a stirring speed of 200 rpm. The analysis using Atomic Absorption Spectrometer (AAS) showed that the total chromium adsorption efficiency occurs in the addition of 6 grams of biosorbent with a contact time of 160 minutes. The adsorption percentage was 98% and the residual level total chromium metal in the tannery liquid waste was 0,33 mg/L after adsorption. These results have fulfilled the quality standard of the leather tannery wastewater that was allowed to be released into the environment with maximum total chrome metal levels of 0,5 mg/L. The total chromium metal biosorption in this study followed the Langmuir isotherm and took place as chemisorption.
Reduction of Chrom Ion (Cr) With Ion Exchange Resin in Liquid Waste of Leather Tanning Saputri, Resy Mareta Dwi; Aurellia, Pingky Marcella; Perwitasari, Dyah Suci
Nusantara Science and Technology Proceedings 1st International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2020.0532

Abstract

The leather tanning industry was classified as industrial in large quantities and dangerous. One of the wastes that produced was waste liquid containing chromium ions. The liquid waste that was released was very cloudy, colored, and has rotten management that caused serious problems to water bodies, communities and the environment. The waste without special handling was discharged into the environment. So that with the ion exchange method, it could reduce environmental pollution caused by industrial leather tanning waste. This study aimed to determine the effect of resin in reducing the chromium ion content in the liquid waste of the leather tanning industry using the ion exchange method. Namely, by consolidating waste and resin with various predetermined variables. The positively charged chromium ion will exchange with the H+ ion found in dowex resin. So that the chromium levels in the tannery liquid waste could be reduced. The results were obtained by the contact time and weight of the resin used. The highest reduction in chromium ion content was at contact time for 80 minutes with a resin weight of 150 grams of 98.75%.
PEMBERDAYAAN MASYARAKAT KELURAHAN GEBANG PUTIH-SURABAYA DALAM MENGELOLA SAMPAH RUAMAH TANGGA MENGGUNAKAN KOMPOSTER SEDERHANA Perwitasari, Dyah Suci; Fauziyah, Nur Aini; Mas’udah, Kusuma Wardhani
SELAPARANG Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 3 (2021): Agustus
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v4i3.5282

Abstract

ABSTRAKPenyuluhan tentang pembuatan kompos organik rumah tangga telah dilakukan di Kelurahan Gebang Putih, Surabaya. Minimnya lahan dan lokasi perumahan yang padat menjadi tantangan terbesar dalam pengomposan. Oleh karena itu, pembuatan kompos sederhana dari sampah organik rumah tangga turut dikembangkan pada penyuluhan ini. Metode yang dikembangkan pada pengabdian ini adalah dengan penyuluhan langsung bersama warga setempat. Tahapan penyuluhan adalah pemilahan sampah, pembuatan kompos organik sederhana, dan diakhiri dengan praktek dalam membuat kompos organik sederhana. Sedangkan  dalam pembuatan kompos dalam skala rumah tangga sangatlah mudah. Ember bekas sebagai media komposter cukup dilubangi bagian bawahnya. Sampah coklat (daun kering, tanah, dst) ditumpuk dengan sampah hijau (sayuran, kulit buat, dst) yang disusun dengan bergantian hingga memenuhi ember. Kemudian, air leri ditambahkan di atas tumpukan sampah tersebut sebagai cairan bioaktivator. Setelah diberikan penyuluhan dan pelatihan, warga mengakui bahwa wawasan dalam mengolah sampah di tengah keterbatasan lahan menjadi lebih terbuka, mudah dan tidak berbau. Keberhasilan pelatihan ini juga didukung oleh kuisioner akhir yang mana rata-rata kemampuan peserta tentang pembuatan kompos meningkat sebesar 83% dari sebelumnya. Kata Kunci: komposter; sampah organik; air leri. ABSTRACTThe training on making household organic compost has been accomplished in Gebang Putih, Surabaya. The lack of land and dense housing locations were the biggest challenges in composting. Therefore, making simple compost from household organic waste was also developed in this counseling. The method developed in this service was direct counseling with local residents. The counseling stages were waste sorting, making simple organic compost, and ending with practice in making simple organic compost. Meanwhile, making compost on a household scale was easy. The used bucket as a composter media was enough to make a hole at the bottom. Brown waste (dried leaves, soil, etc.) was stacked with green waste (vegetables, leather, etc.) which were arranged alternately until they fill the bucket. Then, leri water was added on top of the pile of waste as a bioactivator liquid. After being given counseling and training, the residents acknowledged that the insight in processing waste in the midst of limited land became more open, easy and odorless. The success of this training was also supported by the final questionnaire where the average ability of participants in composting increased by 83% from the previous one. Keywords: composter; organic trash; lei water.
A Coupling Agent's Inclusion Affects Functional Groups and Heat Resistance in Energy Storage Materials Fauziyah, Nur Aini; Perwitasari, Dyah Suci; Wardhani, Primasari Cahya; Ernawati, Dira; Nabilla, Nabilla
The Journal of Pure and Applied Chemistry Research Vol. 12 No. 3 (2023): September-December 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.03.3324

Abstract

The study of functional groups and heat resistance of energy-importing materials, as well as the inclusion of coupling agents, were the primary subjects of this article. 3-(trimethoxysilyl) propyl methacrylate was the coupling agent employed in this study to alter the surface of the silica in the composite material being created. Furthermore, the emergence of bifunctional organometallic (silane) connecting groups allowed the coupling agent to improve the energy storage material's heat resistance. Through the using of dynamic mechanical analysis, scanning electronic microscopy, and thermal tests. It was determined how the type of coupling material affected the interfacial bond strength. According to the findings, there was a significant interaction between the coupling material and the filler surface that had an impact on the material's heat resistance.
Sintesis dan Karakterisasi Al-MCM-41 dari Kaolin Bangka Belitung sebagai Sumber Silika dan Alumina Nurfauzi, Muchamad Lutfi; Susianto, Mordekhai Yosep; Perwitasari, Dyah Suci; Nugraha, Reva Edra; Aziz, Abdul; Jovita, Stella; Utami, Diana Inas; Damayanti, Nabilla
Jurnal Sumberdaya Alam dan Lingkungan Vol 11, No 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jsal.2024.011.02.5

Abstract

ABSTRAK Al-MCM-41 adalah material padatan berpori yang tersusun dari silika amorf, memiliki struktur membentuk susunan heksagonal dengan ukuran pori antara 2-50 nm, sehingga dikategorikan sebagai material mesopori. Dalam pembuatan Al-MCM-41 membutuhkan sumber silika dan alumina yang tinggi sebagai bahan pembuatannya, sehingga dibutuhkan bahan yang kaya akan kedua senyawa tersebut sebagai bahan alternatif dalam pembuatan Al-MCM-41. Rumus formula kaolin adalah Al4(Si4O10)(OH)8 dengan komponen mineral utamanya  adalah SiO2  dan Al2O3 Kaolin yang digunakan berasal dari bangka belitung dengan kandungan SiO2 sebesar 61% dan Al2O3 sebesar 31%, kandungan SiO2 dan Al2O3 yang cukup tinggi dimanfaatkan sebagai bahan pada sintesis material aluminosilikat seperti Al-MCM-41. Sintesis Al-MCM-41 dari kaolin dilakukan dengan metode hidrotermal. pH yang digunakan sebesar 10, dengan suhu 80°C selama 12 jam pada proses hidrotermalnya. Al-MCM-41 hasil sintesis dianalisa menggunakan XRD dan FTIR dimana pada analisa XRD sudut pendek menunjukkan 3 puncak pada 2θ= 2.237°, 3.921°, 4.449° dan XRD sudut panjang pada 2θ= 21.449°. Analisa FTIR untuk Al-MCM-41 menunjukkan pita serapan pada bilangan gelombang 436.49; 802.47; 1146.41; 1630.61; 3389.79 cm-1. Kata kunci: Al-MCM-41, hidrotermal, lempung, mesopori, pH ABSTRACT  Al-MCM-41 is a porous solid material composed of amorphous silica, has a structure forming a hexagonal array with a pore size between 2-50 nm, so it is categorized as a mesoporous material. The manufacture of Al-MCM-41 requires a high source of silica and alumina as materials, so materials rich in both compounds are needed as the development of materials used in the manufacture of Al-MCM-41. Kaolin (Al4(Si4O10)(OH)8) is a white clay mineral, the main minerals are SiO2 and Al2O3. The kaolin used comes from bangka belitung with a SiO2 content of 61% and Al2O3 of 31%, the high content of SiO2 and Al2O3 is utilized as an ingredient in the synthesis of aluminosilicate materials such as Al-MCM-41. The synthesis of Al-MCM-41 from kaolin was carried out by hydrothermal method. The pH used was 10, with a temperature of 80°C for 12 hours in the hydrothermal process. The synthesized Al-MCM-41 was analyzed using XRD and FTIR where the short angle XRD analysis showed 3 peaks at 2θ = 2.237°, 3.921°, 4.449° and long angle XRD at 2θ = 21.449°. FTIR analysis for Al-MCM-41 showed absorption bands at wave numbers 436.49; 802.47; 1146.41; 1630.61; 3389.79 cm-1. Keywords: Al-MCM-41, clay, hydrothermal, kaolin, mesopore, pH 
Studi Kinetika Adsorpsi Limbah Zat Warna Metilen Biru Menggunakan Grafen Oksida dari Karbon Limbah Baterai Fadhila, Dheytra Akhnaz Namira; Nugroho, Sutra Amelia; Perwitasari, Dyah Suci; Nugraha, Reva Edra; Aziz, Abdul; Jovita, Stella; Utami, Diana Inas; Damayanti, Nabilla
Jurnal Sumberdaya Alam dan Lingkungan Vol 11, No 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jsal.2024.011.02.4

Abstract

ABSTRAK Perkembangan industri tekstil menjadi salah satu penyumbang terbesar limbah zat warna ke lingkungan yang berdampak pencemaran terhadap sumber air. Hal ini dikarenakan melalui hasil pengamatan langsung di lapangan kondisi air limbah yang dibuang masih berwarna pekat dan berbau. Penelitian ini bertujuan untuk mempelajari kinetika adsorpsi zat warna metilen biru menggunakan adsorben grafen oksida yang disintesis dari limbah baterai. Metode hummer digunakan dalam sintesis grafen oksida melalui penambahan asam sulfat. Studi kinetika adsorpsi dilakukan pada konsentrasi metilen biru 10-50 ppm serta variasi waktu adsorpsi 5-25 menit. Kondisi optimum diperoleh pada pada konsentrasi metilen biru 30 ppm dengan waktu 25 menit. Mekanisme adsorpsi yang terjadi mengikuti model Langmuir nilai R2 sebesar 0.92522 dengan nilai Qm= 99.1 mg.g-1 dan nilai K=0.325. Kata kunci: adsorpsi, graphene oxide, jurnal, teknik lingkungan ABSTRACT  The development of the textile industry is one of the main sources of dye waste I the environment, which means that the discharged wastewater is still concentrated and smelly when observed directly on the ground, thus contributing to water pollution. The aim of this study is to determine the relationship between the concentration of methylene blue dye and the adsorption time and to determine the adsorption isotherm. For the synhesis of graphene oxide, the hummer’s method was used where graphite wes recombined with H2SO4 sulfuric acid and the adsorbed solution was measured using UV-Vis spectrophotometer. Graphene oxide acted as an adsorbent by adsorbing methylene blue and the result showed that he optimum time and concetration was acheieved at a 30 ppm and 25 minutes.  The adsorption mechanism aligns with the Langmuir model, demonstrated by an R2 value of 0.92522, a Qm value of 99.1 mg.g-1, and a K value of 0.325. Keywords: adsorption, environmental engineering, graphene oxide, journal  
Sintesis Surfaktan Natrium Lignosulfonat (C20H24Na2O10S2) Berbahan Dasar Serbuk Kayu Mahoni Menggunakan Proses Sulfonasi. Maulida, Nabilah; Aisah; Perwitasari, Dyah Suci; Siswati, Nana Dyah; Sani
Jurnal Fisika Unand Vol 14 No 4 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.4.421-427.2025

Abstract

Furniture production made from mahogany wood produces sawdust that contains biomass such as cellulose, hemicellulose, and lignin. The lignin content in mahogany wood can be used as raw material for making sodium lignosulfonate surfactants. Delignification of lignin is carried out alkaline and continued with lignin isolation by acid precipitation. Pure lignin isolate is further used as a raw material for making sodium lignosulfonate surfactants using the sulfonation process. The sulfonation process is carried out by mixing lignin isolate and sodium bisulfite solution using excess NaHSO3 variation and sulfonation time. Both variables are run by adding sodium hydroxide as a catalyst and the pH condition was maintained at pH 4. The sodium lignosulfonate surfactant solution formed was then characterized using FT-IR spectrophotometer and UV-Vis spectrophotometer. The best condition was obtained at a sulfonation time of 150 minutes and NaHSO3 exceeded 75%, namely with a surfactant concentration of   4100,784 mg/L.
Co-Authors Abdul Aziz Aisah Aurellia, Pingky Marcella Damayanti, Nabilla Dira Ernawati Fadhila, Dheytra Akhnaz Namira Jovita, Stella Mas’udah, Kusuma Wardhani Maulida, Nabilah Nabilla Nabilla Nana Dyah Siswati, Anwar Zain and Mohammad Nugraha, Reva Edra Nugroho, Sutra Amelia Nur Aini Fauziyah Nurfauzi, Muchamad Lutfi Pangestu, Muhammad Aji Pracesa, Yahya Ardian Yuma Sani Saputri, Resy Mareta Dwi Susianto, Mordekhai Yosep Utami, Diana Inas