This research was done on the subsurface structure of Nyelanding village hot spring, Air Gegas district, South Bangka with coordinates 2 44’54.514” South Latitude and 106 16’6.773” East Longitude using the Schlumberger geoelectricity configuration method. Measurements were made on three different tracks. The results of the Schlumberger configuration geoelectricity measurements for the three trajectories indicate the presence of granite rock distribution with resistivity values ranging from 455 – 1046 m.

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A study has been carried out on supercapacitor electrodes as an electrical energy storage media based on pepper shell activated carbon. The Synthesis is done by mixing the waste carbon pepper shell with an activator HCl with a ratio of 1: 4. Furthermore, the activated carbon is activated physically by using a pyrolysis temperature of 600 0C. The SEM results indicate that carbon has a porous morphology with a pore size of 24.6 nm which is a mesoporous category. Electrochemical properties are analyzed using cyclic voltammetry (CV). The CV results at the scan rate of 1 mV/s indicate the specific capacitance value generated is 0.45 Fg-1. The results showed that pepper shell waste has the potential to be used as a supercapacitor electrode material

The by-product of pepper production in Bangka Belitung is the waste of pepper skin. This waste tends to be untapped and thrown away so that it can disrupt the environmental ecosystem. One of the efforts to utilize pepper skin waste is processing it into activated carbon as the base material for supercapacitor electrodes. The initial stage of the synthesis was carried out by a pre-carbonization process on a sample of dry and clean pepper peel waste. Furthermore, the sample is chemically activated using a chemical activator and also physical activation at a temperature of 700ºC in N2 gas flow conditions. The activated carbon resulting from the activation is then molded into electrode plates in the form of pellets with a diameter of 1 cm. The electrode plates were characterized using a scanning electron microscope-energy dispersive x-ray (SEM-EDX) to determine morphology and cyclic voltammetry (CV) to determine the specific capacitance value. SEM test results show that the electrode sample has porous morphology and CV results show that the sample activated using the KOH activator has a specific capacitance value of 15.20 F/g. These results indicate that the activated carbon synthesized from the waste of pepper peel can be used as a supercapacitor electrode material and also a solution for overcoming the negative effects of pepper skin waste.

Pepper peel waste is one of the byproducts of pepper production, especially in the Province of Bangka Belitung Islands. One of the efforts to utilize pepper peel, which is used as an activated carbon material that can be used as supercapacitor electrodes, has been carried out. Activated carbon based on pepper peel is synthesized by drying it to dry and then pre-carbonization. The next step is chemical activation using ZnCl2 and followed by physical activation at 700 °C in nitrogen flow conditions (N2) for 3 hours. Characterization of activated carbon material was carried out using SEM-EDX and BET, while the electrode performance used CV (Cyclic Voltamettry). The SEM-EDX and BET test results show that the activated carbon material has a porous structure with an average pore diameter of 2.059 nm. The CV test results were used to determine the energy storage capability with a specific capacitance value of 7.77 F/g at a scan rate of 1 mV/s.

Sintesis karbon aktif yang berasal dari limbah kulit lada sebagai material pengolahan air pasca tambang timah (kulong) di Propinsi Kepulauan Bangka Belitung telah dilakukan. Karbon aktif dipreparasi secara kimia menggunakan aktivator KOH 3M dengan nisbah 1:4 dan dikuti dengan aktivasi secara fisika dengan aliran gas N2 pada suhu 600 0 C selama 3 jam. Sampel karbon aktif hasil preparasi dan telah mengalami pencucian hingga pH netral selanjutnya dikarakterisasi menggunakan SEM-EDX untuk mengetahui struktur morfologinya. Kemudian sampel karbon aktif dilakukan pengujian pada air kulong dengan parameter tingkat kekeruhan dan Atomic Absorbtion Spectrophotometry (AAS). Hasil SEM-EDX menunjukkan bahwa morfologi sampel berpori, selain itu hasil uji tingkat kekeruhan dengan perlakukan penambahan karbon aktif mengalami penurunan. Hasil serupa juga terjadi pada pengujian menggunakan uji AAS. Berdasarkan hasil pengujian dapat disimpulkan bahwa karbon aktif limbah kulit lada dapat dijadikan sebagai material penyerap pada proses pengolahan air pasca tambang timah (kulong).

The synthesis of pepper shell activated carbon-based supercapacitor electrodes to determine the effect of particle size on electrode performance has been done. The pepper shell activated carbon was synthesized using HCl activator with a ratio of 1: 4 (W/V) and then activated physically in an inert condition at 6000C. The characteristics of activated carbon samples were carried out using SEM and BET. SEM results show that carbon has a porous morphology with radius size of absorption pores of 130.0 nm and 121.9 nm respectively for particle size samples of 74 microns and 149 microns. The results of cyclic voltammetry (CV) to find out the value of specific capacitance at a scan rate of 50 mV/s showed an amount of 0.037 F/g and 0.0075 F/g for samples 74 and 149 microns. The results showed the influence of particle size on the performance of supercapacitor electrodes.

As an archipelago, handling plastic waste in the Province of Bangka Belitung Islands is an aspect that needs to be taken seriously. Apart from being focused on developing tourist areas, plastic waste will easily be carried to the sea and prone to be degraded into microplastics, often consumed by marine animals. This community service activity focuses on Penyak Village, Kec. Koba, Kab. Central Bangka, Bangka Belitung Islands. To solve the plastic problem in that location, the community service team conducted training for the community, especially for Pendidikan Kesejahteraan Keluarga (PKK) members, related to processing plastic waste into various recycled creations such as bags, pencil cases, and different kinds of souvenirs. The training program is carried out by providing materials and direct training to increase the understanding and skills. To broaden people's insights, the team conducted training with the Ecoplantstic start-up, which focuses on developing waste-based products. Through the evaluation, it is known that the training provided can improve the knowledge and skills of the community in processing plastic waste into various recycled creations, and several participants plan to develop the skills acquired for entrepreneurial purposes.