Characteristics of sediment Tras Nagreg as part of the volcanic process in the region provides anopportunity and potential to be utilized through mining activities. Mining activities, as a capitalintensive,labor-intensive and risk-filled industry, do not always have a negative impact on thesurrounding community, there is something to do with the economic aspects in which all types ofmineral deposits have economic value including tras. Nagreg Kendan Village, Nagreg Subdistrict aspart of Bandung Regency which has tras sediment potential, where in quality and quantity, trassediment in the area has big enough potency to be utilized especially to improve prosperity of localcommunity. Currently, the number of people with productive age is quite a lot, which becomes thecapital for the management of tras going forward, another thing to consider is the existence of thelocation not far from the access road that connects Bandung - Garut, Bandung - Cianjur and Bandung- Jakarta.

Abstract.Padalarang is located in Cipatat District, Bandung Regency, known as the largest limestone producing area in Indonesia. Limestone mining activities and processing industries are very potential, starting from the marble stone industry, quicklime industry (CaO) to calcium oxide industry (Ca(OH)2). One product of limestone processing is calcium lime (CaO), the result of the calcination process of limestone, on burning limestone that requires large heat. The combustion activities in the majority of the limestone industrial using traditional technology use upright stoves with an open burning combustion system. The fuel used is textile industry waste, shoe industry plus wood waste. The pilot activity of the application of upright furnace limestone combustion technology is a periodically upright combustion system with fuels that have high calorific value, coal and wood. The purpose of mixing this fuel is to use available wood and coal having high calories. This activity also provides education about limestone combustion systems using coal and wood.The application of limestone combustion technology using mixed fuels of coal and wood produces quality limestone with dry conditions with an average combustion temperature of 93.75 oC and compared to using wood fuels and industrial waste produces limestone in dry moist conditions 86.33 oC.Abstrak. Kegiatan pertambangan batu gamping di Kecamatan Cipatat Kabupaten Bandung industri pengolahannya sangat potensil, mulai dari industri batu marmer, industri kapur tohor (CaO) hingga industri kapur padam (Ca(OH)2). Produk dari pengolahan batu gamping adalah kapur tohor (CaO), hasil proses kalsinasi batu kapur. pada pembakaran batu gamping yang membutuhkan panas yang besar. Kegiatan pembakaran pada pabrik-pabrik industri kapur tohor mayoritas menggunakan teknologi tradisional menggunakan tungku tegak dengan sitem pembakaran open burning. Bahan bakar yang dipakai  adalah  limbah industri tekstil, limbah industri sepatu ditambah kayu.  Kegiatan percontohan penerapan teknologi pembakaran batu kapur tungku tegak sistem pembakaran tegak berkala dengan bahan bakar yang mempunyai nilai kalori tinggi yaitu batubara dan kayu. Tujuan mencampur bahan bakar ini memanfaatkan kayu bahan bakar  yang tersedia dan batubara mempunyai kalori tinggi. Kegiatan ini juga memberikan edukasi tentang sistem pembakaran batu kapur menggunakan batubara dan kayu.Kegiatan penerapan teknologi  pembakaran batu kapur dengan menggunakan bahan bakar campuran batubara dan kayu menghasilkan batu kapur berkualitas dengan kondisi kering suhu pembakaran rata-rata 93,75 oC dan dibandingkan dengan menggunakan bahan bakar kayu dan limbah industri  menghasilkan batu kapur kondisi kering lembab suhu pembakaran 86,33 oC.

Gold processing activities along the Ciherang river use Mercury. Monitoring and managing the impact of gold processing activities on the environment by the standard quality of wastewater quality of the Ministry of Environment No.202 Th.2004 concerning Wastewater Quality Standards for Gold and or Copper Ore Processing Activities. Monitoring the quality of wastewater flowing into the river by observing water pH, TDS, and mercury content. Environmental management is carried out by reducing the mercury metal content in wastewater, with the phytoremediation method using Eichhornia Crassipes. Monitoring is carried out at five different locations, wastewater out of gold processing, 2 locations at the settling pond, and 2 locations at the river water. The results showed an increase in mercury content in settling pond 2, 0.525 mg / L, and settling pond 3, 0.00903 mg / L. The environmental management with the Fitoremediation method day 0 Hg levels of 0.06284 mg / L, day 4 Hg levels produced to 0.01203 mg / L, day eight the value of Hg levels 0.114 mg / L, the 12th day the value of the resulting Hg 0.01267 mg / L

Abstract. Limestone is a sedimentary rock composed of calcium carbonate minerals, one of which is the mineral calcite. Mineral calcite is a mineral with chemical kompisi CaCO3 that can be found in a pure state or not, due to the mineral content of impurities. These minerals are scattered in almost all areas of Sukabumi, with the potential for minerals that have been utilized by the community by mining or traditionally. Rock minerals are commonly used as construction and industrial materials in abundance.The research methodology used is to analyze limestone (calcite mineral), by testing the chemical properties of XRF and physical properties of rocks. X-Ray Fluorescence (XRF) is a method for identifying and determining the concentration of elements present in solid, powder to liquid samples. The XRF method is usually used to determine the elemental composition and chemical composition of a material, this method was chosen because it is fast and does not easily damage the sample. Physical characteristics testing revealed porosity values of 3.93% and 3.25% it may be deduced from these values that these limestones frequently have extremely small voids. The two samples' physical characteristics tests yielded void ratios of 0.04 cm3 and 0.03 cm3. Based on this value, the rock's quality can be determined, and if used for its physical attributes, it will be appropriate. The chemical properties of X-Ray fluorescence are known to show that limestone has an average CaO chemical composition of 55.84%. Abstrak. Batugamping merupakan sebuah batuan sedimen yang tersusun dari mineral kalsium karbonat, salah satunya yaitu mineral kalsit. Mineral kalsit adalah mineral dengan komposisi kimia CaCO3 yang dapat dijumpai dalam keadaan murni ataupun tidak, dikarenakan adanya kandungan mineral pengotornya. Bahan galian ini tersebar di hampir semua wilayah Sukabumi, dengan potensi bahan galian yang sudah dimanfaatkan masyarakat dengan menambang maupun secara tradisional. Bahan galian batuan biasa digunakan sebagai material kontruksi dan insutri dengan jumlah yang melimpah. Metodologi penelitian yang digunakan menganalisis batugamping (mineral kalsit), dengan melakukan pengujian sifat kimiawi XRF dan sifat fisik batuan. X-Ray Fluorescence (XRF) yaitu suatu metode untuk mengidentifikasi serta penentuan konsentrasi elemen yang ada pada bentuk padat, bubuk hinggal sample cair. Metode XRF biasanya digunakan untuk menentukan komposisi unsur dan kompisi kimia pada suatu material, metode ini dipilih karena cepat dan tidak mudah merusak sampel. Pengujian sifat fisik yang dilakukan didapatkan nilai porositas 3,93% dan 3,25% di mana nilai tersebut dapat dianalisis bahwa batugamping tersebut cenderung memiliki rongga yang sangat kecil sekaligus sedikit. Void ratio yang didapatkan dari hasil pengujian sifat fisik pada kedua sampel tersebut yaitu sebesar 0,04 cm3 dan 0,03 cm3. Berdasarkan nilai tersebut dapat dinyatakan kualitas batuan tersebut dan akan tepat bila dimanfaatkan secara sifat fisiknya. Pada daerah penelitian melalui pengujian sifat fisik batuan diketahui bahwa batuan dalam kondisi baik untuk dimanfaatkan dan pengujian sifat kimiawi X-Ray Flourescence diketahui bahwa dalam batugamping memiliki senyawa kimia CaO rata-rata sebesar 55,84%.