TEKNOLOGI PENGOLAHAN AIR ASAM TAMBANG BATUBARA “Alternatif Pemilihan Teknologi”

Abstract

Acid Mine Drainage (AMD) treatment systems can be broadly categorised as either active or passive systems, which differ according to their ability to handle Acidity, flow rate and Acidity Load of the influent AMD. Most passive and active systems utilise aggregate carbonate to neutralise the pH and encourage precipitation of metals as hydroxides or sulphide minerals. In addition, passive treatment systems often use organic matter to provide alkalinity and create reducing conditions which favour the precipitation of metal sulphides.Active treatment systems can be engineered to accommodate essentially any acidity, flow rate and acidity load. Active treatment of AMD can be achieved using fixed plants or portable equipment for in-situ treatment. Passive treatment systems are almost invariably used for post closure treatment scenarios, and are best suited to AMD with low Acidity and low flow rates. The key factors in selection and design of active and passive AMD treatment systems are water chemistry including pH, metals, sulphate levels and redox state and flow rate of influent AMD, and the objectives of AMD treatment. Other important factors include capital and operating costs, availability of suitable treatment reagents or materials and sludge management issues. Keywords: Acid Mine Drainage, Active Treatment, Passive Treatment, Coal Mining.

Acid neutralizing capacity minerals in Barani Pit PT Agincourt Resources Martabe, North Sumatera: alternative agent on neutralizing acid mine drainage

“…Referring to Table 2. and coincide with the previous study [4], there are several ANC minerals that are qualified to neutralized the AMD, other than calcite or carbonate minerals. The silicate minerals in Barani Pit that is most likely to be recommended as AMD neutralizer are muscovite (KAl2 (AlSi3O10) (F, OH)2), where this mineral is basically composing all the rock samples that has ANC > 30 H2SO4/ton.…”

“…Gypsum is also identified as ANC mineral in Barani Pit. The chemical composition of gypsum consists of Ca, H, CaO, H20 and S. Calcium oxide in gypsum, also known as pebble quick lime, is categorized as substrate that is favorable for AMD neutralizing [4].…”

“…), has only relying on the use of carbonates mineral groups to handle the AMD issue. Meanwhile, silicate minerals such as quartz, kaolinite, illite, smectite, muscovite, actually also has the capability to neutralize AMD, despite the rate of reaction that is slower than the carbonate minerals [4].…”

Pengolahan Limbah Air Asam Tambang Emas Dengan Proses Netralisasi Koagulasi Flokulasi

“…Proses kimia dan biologi dari bahan-bahan mineral tersebut menghasilkan sulfat dengan tingkat kemasaman yang tinggi. Secara langsung maupun tidak langsung tingkat kemasaman yang tinggi mempengaruhi kualitas lingkungan dan kehidupan organisme [5]. Reaksi pembentukan kalkopirit adalah sebagai berikut [12]:…”

Pengaruh Legum Penutup Tanah Terdapat Pertumbuhan Semai Mahoni (swietenia macrophylla) pada Tanah Marginal

“…Kegiatan revegetasi di setiap tanah marginal memiliki faktor pembatasnya masing-masing. Pada tanah bekas tambang batu bara, limbah kegiatan penambangan berupa air asam tambang mengakibatkan pH tanah menjadi sangat rendah (Susilo et al, 2010;Wijaya, 2010;Hamdani dan Senjaya, 2011;Sulistyo, 2011;Said, 2014). Pada tanah pasir pantai, dominasi pasir mengakibatkan tanah mudah meloloskan air.…”