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REDUCTION OF Ni2+ CONCENTRATIONS IN ELECTROPLATING PROCESS WASTEWATER USING CHITOSAN-ACTIVE CARBON ADSORBENT Anggiany Rizky Kosim; Az-zahara Adelia; Isni Utami; Caecilia Pujiastuti; Suprihatin; Renova Panjaitan
Jurnal Teknik Kimia Vol. 20 No. 1 (2025): JURNAL TEKNIK KIMIA
Publisher : Department of Chemical Engineering, Universitas Pembangunan Nasional Veteran Jawa Timur

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Abstract

The removal of Ni2+ from electroplating process wastewater can be effectively accomplished using chitosan modified with activated carbon through an adsorption process. This research aims to develop adsorbents with varying mass ratios of chitosan to activated carbon and assess their efficacy in reducing Ni2+ concentrations, the impact of contact time on this reduction. Adsorbents were prepared by crosslinking protonated chitosan with tripolyphosphate and incorporating activated carbon in the following ratios: 0.5:1.5, 0.75:1.25, 1:1, 1.25:0.75, and 1.5:0.5 grams per gram. The adsorption process involved contacting 500 milliliters of electroplating process wastewater with 2 grams of adsorbent for various durations of 15 to 75 minutes. Ni2+ concentration in the filtrate was analyzed using Atomic Absorption Spectroscopy (AAS), and the adsorbent was characterized with Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy (SEM-EDX). The optimal conditions for Ni2+ removal occurred with a chitosan/activated carbon mass ratio of 0.5:1.5 grams per gram and a contact time of 60 minutes, resulting in a final Ni²⁺ concentration of 2.17 mg/L, an adsorption efficiency of 98.92%, and an adsorption capacity of 49.46 mg/g. These findings demonstrate the effectiveness of chitosan/activated carbon composites in treating Ni2+ contamination in electroplating wastewater, offering a sustainable environmental solution.
Sintesis  Pupuk Organik Dari Kotoran Sapi dan Ampas Kopi Menggunakan Bioaktivator Promi Dengan Metode Fermentasi Anaerob Pratiwi, Dea Vanny; Siregar, Aldo Yehezkiel; Suprihatin
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Kotoran sapi dan ampas kopi merupakan limbah pertanian dan peternakan yang memiliki potensi besar sebagai bahan baku pupuk organik karena kaya akan nutrisi makro seperti nitrogen (N), fosfor (P) dan kalium (K). Penelitian ini bertujuan untuk menyintesis pupuk organik dari kotoran sapi dan ampas kopi serta mengevaluasi pengaruh jumlah ampas kopi dan durasi fermentasi anaerob terhadap rasio C/N guna menentukan kondisi proses yang optimum sesuai dengan SNI 19-7030-2004. Proses fermentasi dilakukan secara anaerob menggunakan bioaktivator PROMI yang mengandung mikroba Trichoderma harzianum, Pseudokoningii, dan Aspergillus sp. untuk mempercepat dekomposisi bahan organik. Variasi konsentrasi ampas kopi yang digunakan adalah 13%, 16%, 19%, 22%, dan 25% dengan durasi fermentasi selama 3, 6, 9, 12, dan 15 hari. Kadar karbon (C) organik dan nitrogen (N) total diuji menggunakan metode spektrofotometri, sementara nilai pH dipantau untuk memastikan kualitas pupuk. Hasil penelitian menunjukkan bahwa baik jumlah ampas kopi maupun waktu fermentasi berpengaruh signifikan terhadap perubahan kadar C-organik, N-total, dan rasio C/N. Kondisi optimum dicapai pada variasi ampas kopi 25% dengan waktu fermentasi 3 hari, yang menghasilkan rasio C/N sebesar 16,36, kadar fosfor 0,39%, dan kadar kalium 1,75%. Semua parameter pada kondisi tersebut telah memenuhi standar mutu SNI 19-7030-2004, menandakan pupuk telah matang dan layak digunakan.
Sintesis dan Karakterisasi Mikrokristal Selulosa dari Eceng Gondok dengan Hidrolisis Asam Sulfat Febriyani, Tri Surya; Azza Nabila Rahmadhani; Suprihatin; Sani
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Eceng Gondok memiliki potensi besar sebagai bahan baku untuk Mikrokristal Selulosa (MCC) karena kandungan selulosa pada tanaman ini mencapai 60,29%. Tujuan penelitian ini adalah untuk memproduksi MCC yang memenuhi standar Handbook of Pharmaceutical Excipients melalui tahapan isolasi α-selulosa dan hidrolisis dengan asam sulfat 1,5 M pada suhu 80°C. Proses isolasi menghasilkan kandungan α-selulosa sebesar 43,61%, sedangkan kondisi hidrolisis terbaik dicapai pada volume pelarut 100 mL selama 40 menit. Produk MCC yang dihasilkan berupa bubuk berwarna krem muda, tidak larut dalam air, dengan kadar air 0,24%, densitas 0,8245 g/cm³, dan pH 7,31. Analisis morfologi melalui SEM menunjukkan bentuk batang dan pipih memanjang dengan aglomerasi di beberapa area. Hasil XRD mengonfirmasi pembentukan kristal selulosa II dengan puncak karakteristik pada 11,83°, 12,26°, 20,04°, 21,76°, dan 34,53°. Berdasarkan analisis kuantitatif, derajat kristalinitas sebesar 68,0870%, derajat amorf sebesar 31,9130%, dan ukuran kristal rata-rata sebesar 7,22 nm, menunjukkan struktur produk yang stabil. 
Domestic Roles, Gender Responsibility, and Justice in Islamic Law: The Position of Wives as Housewives Suprihatin
KRTHA BHAYANGKARA Vol. 20 No. 1 (2026): KRTHA BHAYANGKARA: APRIL 2026
Publisher : Fakultas Hukum Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/krtha.v20i1.3637

Abstract

This article recontextualizes the societal understanding of the role of wives as housewives within the framework of Islamic law, challenging perceptions that associate this role with oppression or injustice. The study employs a normative legal research method, using statutory analysis, Islamic legal sources (the Qur’an, Hadith, and fiqh doctrines), and conceptual–doctrinal interpretation to examine the legal construction of domestic roles. The findings demonstrate that the designation of a wife as a housewife is consistent with Islamic legal principles. However, the study identifies a critical tension arising from rigid, gender-based divisions of labor that dichotomize domestic and public spheres, often positioning domestic responsibilities exclusively upon wives while assigning public authority to husbands. The analysis shows that Islamic law conceptualizes the domestic sphere as a shared domain of responsibility between spouses, grounded in mutual leadership (jamā‘iyyah al-qiyādah al-ri‘āyah), cooperation, and accountability, while also permitting wives’ participation in public life under theonomic ethic and familial considerations. This article contributes to Islamic legal scholarship by offering a contextual reinterpretation of domestic norms that reconciles statutory family law with Islamic jurisprudence, promoting a justice-oriented, cooperative, and non-hierarchical model of family life.
PEMBUATAN PUPUK ORGANIK PADAT BERBASIS KULIT DURIAN DAN STARDEC DENGAN METODE COMPOSTING AEROB Suprihatin; Sulistya, Radithya Bagus; Silalahi, Jevanya Nathanael
Jurnal Inovasi Teknik Kimia Vol. 10 No. 3 (2025): July | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v10i3.15018

Abstract

This study aims to examine the effects of Stardec bioactivator dosage and composting time on the nutrient quality of solid organic fertilizer derived from durian peel waste. The method employed was aerobic composting using an in-vessel system with variations in Stardec dosage and composting duration. The results showed that increasing the Stardec dosage and composting period significantly enhanced the macronutrient content. The optimal condition was achieved by adding 15 grams of Stardec on the 15th day, resulting in organic carbon of 26.29%, total nitrogen of 4.76%, total phosphorus (P-total) of 3.97%, and total potassium (K-total) of 4.43%. The resulting C/N ratio ranged between 5–10, indicating good compost maturity and readiness for soil application. All final parameters, including pH and moisture content, complied with the quality standards of SNI 7763-2024, confirming that the product is suitable for use as a safe and nutrient-rich organic fertilizer for soil improvement.
INTEGRASI NILAI KEPEMIMPINAN NABI MUHAMMAD SAW DALAM MODEL TRANSFORMATIONAL DAN SERVANT LEADERSHIP Dikriyah; Suprihatin
Kaffah: Jurnal Pendidikan dan Sosio Keagamaan Vol 4 No 2 (2025): Kaffah: Jurnal Pendidikan dan Sosio Keagamaan
Publisher : Fakultas Agama Islam, Universitas Mathla'ul Anwar

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Abstract

Abstract: Leadership is an important aspect in building civilisation and social change. In the modern context, two widely discussed leadership models are Transformational Leadership and Servant Leadership. Both models have values that are in line with the principles of leadership in Islam as taught in the Qur'an and exemplified by the Prophet Muhammad (peace be upon him). This study aims to analyse the relationship between these two concepts and the verses of the Qur'an that emphasise the values of compassion, justice, exemplary behaviour, deliberation, and social responsibility. The results of the study show that Transformational Leadership is reflected in the visionary and inspirational leadership of the Prophet Muhammad (peace be upon him), which transformed society for the better (QS. Al-Imran [3]:159; QS. Al-Anbiya [21]:107), while Servant Leadership is reflected in his humble attitude, serving the people, and upholding justice (QS. Al-Furqan [25]:63; QS. Al-Ma'idah [5]:8). Thus, Islamic leadership is able to integrate transformational and service values into a unified Qur’anic leadership ethic. Keywords: Islamic leadership, transformational leadership, servant leadership, Al-Qur’an
Co-Authors Aaliyah Viorella Nada Tamtama Ade Andini Adi, Nugroho Prasetya Afiani, Devi Ilona Afniar Rahmawati, Aulia Agus Supriyanto Ahmad Ajib Ridlwan Aisyah, Aurela Naura Akhmad Kharis Kurniawan Amalia, Dwi Ananda Amin Ash Shabah, Musyaffa Andes Ismayana Anggiany Rizky Kosim Aniyatussaidah, Aniyatussaidah Antin Okfitasari, Antin Arfiana Arif Rahman Arini Gardinia Latifah Ayu Atikah Dewi, Retno Az-zahara Adelia Azza Nabila Rahmadhani Bate'e, Yamowa'a Belani, Maritsa Bima Setyo Nugroho Bunga Tiara Carolin Caecilia Pujiastuti Citra Ashri Maulidina Deti Nurdianah Dian Mursyida, Dian Dikriyah Dinda Sherly Allamanda Dwi Cahyo Setyono E. Rizky Wulandari Edy Kusnadi Efri Yulistika Ema Damayanti Eni Widiastuti Erlinda, Riska Melati Fajri, Wilda Wirdatul Fauzi, Fuad Febriyani, Tri Surya Firda Aulia Miftahul Zanah Furizal Hafiza, Putri Nur Hardiantika, Widya Hariyadi Hartrisari Hardjomidjojo Haryanto, Totok Hayatun Nufus Hens Saputra Hutauruk, Jeremia Ida Nurjannah Ika Indra Aryani Ika Nawang Puspitawati ilma Imam Riadi Imanda, Arsyi Indah Choiriyah ISNI UTAMI Istihanah Nurul Eskani, Istihanah Nurul Jerricho Ivandro Ekklesia Julian, Alif K. Sumada Kharis Kurniawan, Akhmad Kurnia Khairunnisa Lailatul Soimah Lianty, Leliana Lili Apriyani Lilik Ariyanto Lisa Rizky Amalia Luluk Edahwati Luluk edahwati Maemunah, Imas Maidiantius Tanyid Mariani, Evi Marisi, Dany Poltak Marjunus, Roniyus Matasik, Delfania Mazaya Najmy Tsaqyfa Moh. Yani Muhammad Fikri Mujiburrohman MULYADI Musyaffa Amin Ash Shabah Nabilah Nabillah Faradita Hasan Nastiti Siswi Indrasti Nazwatul Padilah NENENG Norma Cahyani Nugraha, Yosep Widi Nurdewanto, Rasya Athaya Dezukra Nurfauziah, Rosavinda Nurjamilah Nurul Citra Lestari Oktarina, Riesta Ayu Ono Suparno Paramuji, Muji Pariyanti, Gangsar Pebriyanti Putri, Rizka Perwitasari, Diyah Suci Pratiwi, Dea Vanny Pujiastuti, Caecilia Puspita Sari, Ratna Putri , Tsabitah Phalozaky Anta Putri Dwi Rahayu Putri Novita Sari Putri Prima, Edelweis Putri, Jesika Kirana R. Dewati Rafi, Muhammad Dary Rahayu Kurniawati Rahayu Winarti Rahma Putri Salsabila Rahmi Susanti Ramadhanu Dirja Ramandani, Adityas Agung Rara Anggraini Ratna Puspita Sari, Ratna Puspita Reffy Ananda Rizki Renova Panjaitan Retno Widowati Retno Widowati Rianggi Wahyuni Pratiwi Riesta Ayu Oktarina Rieswana, Yuried Rifdah Rohadatul Aisy Riski Meilani Rr. Tsabitah Phalozaky A.P Rudi Nugroho S Sutiyono S. Muljani Sadarela Safira Cecilia Z Salamah Churiyatul Jannah Sani Saputra, Andika Wahyu Sari, Flory Anita Sarmauli Setinawati Shabah, Musyaffa Shahnez Annisa Mekoa Siauta, Jenny Anna Silalahi, Jevanya Nathanael Simon Sembiring Siregar, Aldo Yehezkiel Siriatun Nazah Siti Dewi Maharani Siti Fatimatul Muffidah Sri Muljani SRIE MULJANI Sukard Sulistya, Radithya Bagus Suprihatin Suprihatin Surya, Agus Susilowati Sutiyono sutiyono sutiyono Sutrisna, Dadi Tasnim Rahman Fitra Tawar Thohiroh, Aniska Titi Candra Sunarti Titi Susilowati Tri Haryono Trianna, Nurul Widji Tungga Hayu Nirmala, Cipta Ujianto, Virgo Urbanus Utomo, Prasetyo Hadi Vava Imam Agus Faisal Vivi Silawati Wati, Ika Yuliana Wibyantri, Gabriella Ananda Widi Astuti Widji Triana, Nurul Wijaya, Safrial Angra Wiwit Sundari Wulandari, Anita Agustina Yekti, Devi Setyo Wihastuti Yenni Anwar Yenny Aulya Yunus Triyonggo, Yunus