Acid mine drainage (AMD) is a global environmental issue. Conventionally, a number of active and passive remediation approaches are applied to treat and manage AMD. ... A critical review on remediation, reuse, and resource recovery from acid mine drainage Environ Pollut. 2019 Apr:247:1110-1124. doi: 10.1016/j.envpol.2019.01.085. Epub 2019 …

The large volumes of sludge produced through the active treatment of acid mine drainage (AMD) require further processing and final disposal. AMD sludge typically contains a heterogeneous mixture of iron, aluminum, magnesium, and calcium oxides/hydroxides that are of little to no practical value. However, purified iron and …

effective methane emission reductions through recovery and use from four key methane sectors: coal mining, landfills, oil and gas systems, and agriculture. The Coal Subcommittee has brought together key experts in coal mine methane recovery and utilisation to share information about state‐of‐the‐art

Evaluation of methane drainage and use effectiveness. The practice of methane drainage and utilization has promoted enhanced safety, environmental mitigation and energy recovery in the Luling mine. Pre-drainage eliminates the risk of outbursts in the Nos. 8, 9 and 10 seams, and post-drainage reduces the overall gas emissions from …

Recommended principles and standards on coal mine methane (CMM) capture and use are explained clearly and succinctly to provide decision-makers with a solid base of …

In this study, chemical oxidation technology was applied to establish a 12 m 3 /d pilot-scale treatment process to precipitate high-concentration iron (510.3 ± 50 mg/L) under acidic conditions. The experimental results showed that the Fe 2+ oxidation rate and TFe (total Fe) removal rate exceeded 99%, while the loss of Cu and Mn did not exceed 4%.

Coal bed methane (CBM) is a clean, efficient, and environmentally friendly energy, and its efficient exploitation can meet the growing demand for energy worldwide. Besides, methane (CH 4) is a greenhouse gas (GHG) and is 25–72 times more powerful than carbon dioxide (CO 2) in inducing global warming. With regard to the mining …

Australian gas and carbon prices are driving deeper SIS pre‐drainage. High value markets support deeper pre‐drainage and reduce mine emissions. The gas drainage objectives of mining and CSG companies are aligned. Success requires aligned values, commitment, and collaborative planning.

The recommended pH for iron precipitation was pH 3.5-4.0 with precipitate purity > 93.4% and iron recovery > 98.6%. AMD water after iron removal was used as source water for aluminum recovery.

@article{Feng2016DistributionOM, title={Distribution of methane enrichment zone in abandoned coal mine and methane drainage by surface vertical boreholes: A case study from China}, author={Guo-rui Feng and Shengyong Hu and Zhen Li and Jiang Haina and Zhang Yuting and Guang Xu and Zhuo Wang and Kan Lixun}, journal={Journal of …

Hedin RS. Recovery of marketable iron oxide from mine drainage in the USA. Land Contamination and Reclamation. 2003; 11 (2):93-98; 124. Flores RG, Andersen SLF, Maia LKK, José HJ, de Moreira RFPM. Recovery of iron oxides from acid mine drainage and their application as adsorbent or catalyst. Journal of Environmental Management. 2012; …

Acid mine drainage (AMD), has long been a significant environmental problem resulting from the microbial oxidation of iron pyrite in presence of water and air, affording an acidic solution that contains toxic metal ions. The main objective of this study was to remove and recover metal ions from acid mine drainage (AMD) by using lignite, …

A laboratory-scale up-flow anaerobic sludge blanket (UASB) reactor was developed and constructed for the treatment of landfill leachate and acid mine drainage (AMD). The removal of chemical oxygen demand (COD), sulfate, and metal ions was studied. The maximum COD and sulfate removal efficiency reached 75% and 69%, …

Coalbed methane is generated in the coalification process. The two main sources of methane are biogenic and thermogenic, as shown in Fig. 1 (Moore, 2012).Normally, the thermogenically derived methane content in coal is higher than the content of biogenic methane (typically less than 6 m 3 /t). In a specific basin, the …

Mine drainage systems in place may be especially good candidates for the developme nt of cost- effective methane recovery and use projects because a ready supply of high- or …

Acid mine drainage (AMD) and acid rock drainage (ARD) are both strong acidic waste. water rich on dissolved metal sulphates. They are formed in a complex process in which p yrite. and other ...

Coal mine methane (CMM) drainage is an effective method to curb the occurrence of coal and gas outburst and gas explosion, ... Recovery, Utilization, and Environmental Effects Volume 42, 2020 - Issue 18. Submit an article Journal homepage. 665 Views 1 CrossRef citations to date Altmetric

This map provides information on existing methane recovery projects at U.S. coal mines and serves as a screening tool to identify mines that could potentially host …

How is methane emitted from coal mines? There are three primary ways methane is released because of mining activities: Degasification systems at active underground mines.Also commonly referred to as drainage systems, these systems employ vertical and/or horizontal wells to recover methane before (pre-mine drainage) …

An improved method for high-efficiency coal mine methane drainage: Theoretical analysis and field verification. Energy Sci. Eng. 6, 739–748 (2018). Article CAS Google Scholar

The reasonableness of sealing length (12 m) was verified by the test results of methane concentration and flux within 40 days. All those outcomes can provide references for other mines to determine the minimum reasonable sealing length of in-seam boreholes for CMM drainage.

Once a mine is sealed from the atmosphere, gas from all underground sources becomes potentially available for extraction at a single production location. Methane …

ISBN 978-88-95608-19-8; ISSN 1974-9791. Recovery of Metals from Acid Mine Drainage. Eva Macingova*, Alena Luptakova. Institute of Geotechnics, Slovak Academy of Scie nces, Watsonova 45, 043 53 ...

Iron oxides (goethite) were recovered from acid mine drainage through a sequential precipitation method. Thermal treatment at temperatures higher than 300 °C produces hematite through a decrease ...

The recovery and use of CMM emissions have benefits for the local community as well as the global environment. Some benefits of capturing and using CMM include: Reducing greenhouse gas (GHG) emissions, since methane is a very potent greenhouse gas. Providing a valuable source of clean-burning energy that can be used …

The recommended pH for iron precipitation was pH 3.5–4.0 with precipitate purity 93.4% and iron recovery 98.6%. AMD water after iron removal was used as source water for aluminum re-covery ...

CMM drainage and utilization projects in combination with good safety practices at coal mines could reduce the risk of methane-related explosions by preventing the buildup …

feasibility study to examine the potential for a coal mine methane ( CMM) recovery and utilization project at a Russian coal mine. GMI is a voluntary, multilateral partnership that aims to reduce global . methane (CH. 4) emissions and to advance the abatement, recovery, and use of methane as a valuable clean energy source.

– To promote the profitable recovery and use of coal mine methane by working cooperatively with coal companies and related industries ... – Prohibits emission of methane from CBM drainage systems – CMM drainage systems with > 30% methane concentration must use or flare the gas 1818. Chi l l f kChina: legal framework

Thus methane drainage is of significance, as it is an effective way to decrease the methane content, and thus reduce methane emissions. ... Novel integrated techniques of drilling–slotting–separation-sealing for enhanced coal bed methane recovery in underground coal mines. Journal of Natural Gas Science and Engineering, Volume …