Study of Inorganic Pollutants Removal from Acid Mine Drainage by Hemp Hurds

Abstract Sulphates in wastewaters have an origin as the by-products of a variety of industrial operations. A specific and major producer of such effluents, which contained sulphates and heavy metals, is the mining industry. These contaminants should be removed from wastewater using an adequate process of treatment. The paper deals with selected heavy metals (iron, cooper, and manganese) and sulphate removal from acid mine drainage outflowing from an abandoned mine in Smolnik (Slovakia) using the modified biosorbent - Holland hemp hurds. Pre-treatment of acid mine drainage was based on oxidation of ferrous cations from acid mine drainage by hydrogen peroxide and subsequent precipitation. The precipitate were analysed by infrared spectrometry which found the precipitate containing hydroxide and sulphate functional groups. During this process the concentration of sulphate decreased by 43.8 %. Hemp hurds modified by NaOH decreased concentration of Cu2+ in solution by about 70 %

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Penerapan Wetland untuk Pengelolaan Air Asam Tambang

KURVATEK ◽

10.33579/krvtk.v3i2.860 ◽

2018 ◽

Vol 3 (2) ◽

pp. 41-46

Author(s):

Agus Panca Adi Sucahyo ◽

Waterman Sulistyana Bargawa ◽

Mohammad Nurcholis ◽

Tedy Agung Cahyadi,

Keyword(s):

Heavy Metals ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Mining Industry ◽

Acid Rock ◽

Acid Mine ◽

Run Off ◽

Environmental Pollution Problem ◽

State Water ◽

Wetland System

ABSTRAKAir asam tambang (AAT) merupakan air dengan kandungan pH rendah (di bawah 5) yang ditimbulkan akibat industri pertambangan. AAT terbentuk dari bertemunya tiga komponen, yaitu batuan yang mengandung sulfat, air dan udara. Batuan yang mengandung asam (potential acid foarming) yang terkupas selama kegiatan penambangan dapat membentuk AAT setelah bertemu udara dan air yang berasal dari paparan air hujan langsung, air limpasan dan rembesan air tanah. Air limpasan yang tercemar tersebut mempunyai pH sekitar 2 – 4 dengan kandungan logam berat berupa Al, Fe, Mn, Cu dan Zn. Metoda dalam pengelolaan AAT terdiri dari sistem aktif dan sistem pasif. Paper ini membahas mengenai pengelolaan AAT dengan menggunakan sistem pasif wetland. Cakupan yang dibahas menyajikan beberapa hal terkait wetland diantaranya: ukuran wetland dan desain wetland yang tepat termasuk keasaman air yang keluar dari tambang (pH), kondisi reaksi oksidasi, laju aliran air serta waktu yang diperlukan dalam proses wetland serta luasan area yang tersedia untuk konstruksi wetland. Manfaat yang dihasilkan dari studi ini dapat digunakan untuk penelitian selanjutnya dalam rangka program penutupan tambang tembaga dan emas.Kata kunci: wetland, remediasi pasif, air asam tambang (AAT) Acid mine drainage (AMD) is the most significant environmental pollution problem with a low pH (below 5) caused by the mining industry. AMD is former from three components, exposed acid rock contain sulphate, water and air. The exposed acid rocks (potential acidic forming) during mining activities create a chemical reaction with air and water can be from seepage and run off. The water overflow from pit lake has a pH around 2 – 4 and contain heavy metals, i.e. Al, Fe, Mn, Cu, and Zn. The methods of AMD treatments that are active and passive systems. This paper discusses the AMD treatment using passive wetland system. Main factors passive removal of acidity and heavy metals using wetlad system when determining type and size appropriate wetland system include the influent acidity, pH, redox state, water flow rates and retention times, the area available for wetland. The benefits of this study for passive AMD treatment using wetland can be used for further research to supporting the copper and gold mine closure program. Keywords: wetland, passive reamediation, acid mine drainage

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Mechanisms and Remediation Technologies of Sulfate Removal from Acid Mine Drainage

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.3252 ◽

2012 ◽

Vol 610-613 ◽

pp. 3252-3256

Author(s):

Mei Qin Chen ◽

Feng Ji Wu

Keyword(s):

Heavy Metals ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Metal Corrosion ◽

Sulfate Ion ◽

High Concentration ◽

Biological Reduction ◽

Acid Mine ◽

Sulfate Removal ◽

Co Precipitation

Acid mine drainage (AMD) has properties of extreme acidification, quantities of sulfate and elevated levels of soluble heavy metals. It was a widespread environmental problem that caused adverse effects to the qualities of ground water and surface water. In the past decades, most of investigations were focused on the heavy metals as their toxicities for human and animals. As another main constitution of AMD, sulfate ion is nontoxic, yet high concentration of sulfate ion can cause many problems such as soil acidification, metal corrosion and health problems. More attention should be paid on the sulfate ion when people focus on the AMD. In the paper, sulfate removal mechanisms include adsorption, precipitation, co-precipitation and biological reduction were analyzed and summarized. Meanwhile, the remediation technologies, especially the applications of them in China were also presented and discussed.

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