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Degradasi Congo Red Secara Fotosonolisis Menggunakan Katalis ZnO-TiO2 Amelia, Reza; Sanjaya, Hary
Periodic Vol 8, No 2 (2019): PERIODIC
Publisher : Jurusan Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.431 KB) | DOI: 10.24036/p.v8i2.108767

Abstract

This study aims to determine the optimum time and amount of TiO2 used for doping the optimum ZnO in degrading Congo Red dye. The results of the percentage degradation were obtained from the absorbance value which was measured using a UV-Vis Spectrophotometer. (λmax) Congo Red obtained from measurements using a UV-Vis Spectrophotometer is 498 nm. The results showed that the optimum irradiation and sonication time to degrade Congo Red was 75 minutes with a degradation percentage of 98.11%. On the effect of variations in the amount of TiO2 doping showed optimum results at 20% ZnO-TiO2, with a degradation percentage of 96.85%. The results of XRD analysis showed that the crystal size of 20% ZnO-TiO2 was 48.57-96.58 nm. While analysis with UV-DRS obtained a band gap value of 20% ZnO-TiO2 which is 3.11 Ev.
Analisis Kandungan Karbon di Taman Kehati PT Chandra Asri Cilegon: Carbon Content Analysis at Kehati Asri Park PT Chandra Asri Cilegon Marianingsih, Pipit; Mahrawi, Mahrawi; Purnama, Dania; Oktaviani, Hesti; Amelia, Reza; Eliyana, Siti; Karahayon, Yoseph Sugiharto; Febrio, Eren Putra
Biospecies Vol. 16 No. 2 (2023): Juli 2023
Publisher : Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/biospecies.v16i2.26704

Abstract

CO2 emissions continue to increase every year. The increase in CO2 emissions in Indonesia is caused by an increase in greenhouse gases and the production of CO2 emissions is inseparable from human activities. One of the efforts to reduce CO2 emissions can be done through the Biodiversity Park (Kehati) development program. This study aims to determine the estimation of biomass, carbon stocks and carbon dioxide absorption in PT Chandra Asri's biodiversity park as one of the efforts to reduce carbon emissions. The method used in collecting data on biomass is a non-destructive sampling method using allometric equation analysis to extrapolate biomass. The results showed that the total estimated biomass of all standing categories was 2745 tons/ha, the total carbon stock was 1290.15 tons/ha and the total CO2 absorption was 4734.85 tons/ha. This shows that the carbon stock in Taman Kehati PT. Chandra Asri Cilegon is in the high category because it spans more than 100 tonnes/ha so that PT. Chandra Asri Cilegon can maximize its function as a carbon absorption and storage area to reduce CO2 emissions. Keywords: Allometric equations, biodiversity park, biomassa, carbon dioxide absorption, carbon   Abstrak Emisi CO2 terus mengalami peningkatan di tiap tahunnya. Meningkatnya emisi CO2 di Indonesia diakibatkan oleh meningkatnya gas rumah kaca (GRK) dan produksi emisi CO2 ini tidak terlepas dari aktivitas yang dilakukan oleh manusia. Salah satu upaya penurunan emisi CO2 dapat dilakukan melalui program pembangunan Taman Keanekaragaman Hayati (Kehati). Penelitian ini bertujuan untuk mengetahui perkiraan estimasi biomassa, cadangan karbon dan serapan karbon dioksida di taman kehati PT Chandra Asri sebagai salah satu upaya dalam penanganan untuk mengurangi emisi karbon. Metode yang dipakai dalam pengambilan data biomassa yaitu metode nondestructive sampling menggunakan analisis persamaan allometrik untuk mengekstrapolasi biomassa. Hasil penelitian menunjukan jumlah estimasi biomassa semua kategori tegakan sebesar 2745 ton/ha, jumlah cadangan karbon sebesar 1290,15 ton/ha dan jumlah serapan CO2 sebesar 4734,85 ton/ha. Hal ini menunjukkan bahwa cadangan karbon pada Taman Kehati PT. Chandra Asri Cilegon berada dalam kategori tinggi karena berada direntang lebih dari 100 ton/ha sehingga Taman Kehati PT. Chandra Asri Cilegon dapat memaksimalkan fungsinya sebagai salah satu kawasan penyerapan dan penyimpanan karbon untuk untuk mengurangi emisi CO2. Kata kunci: Biomassa, cadangan karbon, persamaan allometrik, serapan karbondikosida, taman kehatiÂ