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Analisis Sifat Fisika dan Derajat Keasaman terhadap Kualitas Air Minum Isi Ulang 20 Rumah RW 01 di Kampung Cilember Desa Jogjogan Kecamatan Cisarua Kabupaten Bogor Bina Permana; Devi Indrawati Syafei; Hilman Syafei; Okta Olifvia; Novita Cahyani Fitri; Neha Rendita Sundari; Wildan Sahari; Diliviva Venesia; Alivia Nur Aini; Brigita Olivia Gamellia; Katipah Katipah; Muhammad Arif; Aprillia Anggraani
Risenologi Vol. 5 No. 1 (2020): Risenologi
Publisher : Kelompok Peneliti Muda Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.753 KB) | DOI: 10.47028/j.risenologi.2020.51.82

Abstract

Air merupakan sumber daya alam yang berperan penting dalam kehidupan setelah udara, salah satu peran terpentingnya adalah untuk dikonsumsi. Namun, permasalahan yang sering terjadi adalah kurangnya pengetahuan masyarakat tentang kualitas air minum khususnya isi ulang yang dikonsumsi. Tujuan dari penelitian ini adalah untuk menganalisis kualitas air minum isi ulang beberapa Rumah di RW 01 Kampung Cilember Desa Jogjogan Kecamatan Cisarua Kabupaten Bogor terhadap hasil uji sifat fisika dan derajat keasamannya. Metode penelitian yang dilakukan dalam pengambilan sampel air minum adalah metode sampel gabungan tempat atau integrated sampel, terdapat 20 rumah warga dilakukan pengambilan sampel air untuk diukur kualitas secara fisika (warna, bau, rasa, TDS dan suhu) dan secara kimia (pH atau derajat keasaman). Berdasarkan hasil pengujian, terdapat 5 rumah yang memenuhi standar kualitas air minum isi ulang dari 20 rumah warga yang diuji. Hal tersebut dapat dilihat dari parameter standar yang berlaku dengan kisaran pH antara 6,5-8,5, TDS rata-rata 600-900 ppm, suhu ±3oC suhu udara, serta tidak memiliki bau, rasa, dan warna.
Electrodeposition of Zn Zn-doped Cu Cu2O in Acidic and Alkaline Solution and Its Catalytic Activity for Ethanol Electrooxidation Setia Budi; Devi Indrawati Syafei
Jurnal Sains Materi Indonesia Vol. 24 No. 2 (2023): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2023.760

Abstract

In this study, Zn-doped Cu2O films were synthesized by electrodeposition technique in acidic (pH 4) and alkaline (pH 10) solution. Catalytic activity of the film was evaluated toward ethanol electrooxidation which was carried out using cyclic voltammetry technique. X-ray diffraction (XRD) analysis showed the formation of cubic structure of Cu2O from both conditions. Morphological characterization conducted under a field-emission scanning electron microscope exhibited that Cu2O particles electrodeposited in the acidic condition were smaller compared to those obtained in the alkaline condition. The photoelectrochemical responses, which were recorded using a linear sweep voltammetry technique, showed that the highest photocurrent density was 31.5 mA.cm-2 that obtained at 0.76 V vs. Ag/AgCl using Zn-doped Cu2O film prepared in the acidic condition. The film also possesses a low resistance charge transfer as measured by the electrochemical impedance spectroscopy (EIS) technique. These electrochemical characteristics resulted in a high catalytic performance of the Zn-doped Cu2O film on the ethanol electrooxidation as shown by the high anodic current of 22 mA.cm-2 at 0.968 V. These results indicated that the Zn-doped Cu2O film electrodeposited in the acidic condition has a good catalytic activity towards ethanol electrooxidation process.
Co-Authors Alivia Nur Aini Aprillia Anggraani Bina Permana Brigita Olivia Gamellia Diliviva Venesia Hilman Syafei Katipah Katipah Muhammad Arif Neha Rendita Sundari Novita Cahyani Fitri Okta Olifvia Setia Budi Wildan Sahari