One objective of this study was to determine the critical parameters needed for designing of a plant to remove selenium from the mine leachate. While development of a full-scale engineering design was beyond the scope of the present study, the following design elements were evaluated: A) Loading of the Alumina to the Adsorbers B) Backwashing … Read more
Most natural zeolites now being produced are used in low tech applications such as horse stall deodorizers, aquarium filters, and animal adsorbents. Characterization of Natural Zeolites: Before any uses or applications of zeolites to the recovery of heavy metals from mining or metallurgical effluents can be seriously considered it is necessary to characterize the zeolite … Read more
A Passive Mine Drainage Treatment Systems helps treat contaminated coal mine drainage to meet EPA and State water quality requirements. Approach A model (fig. 1) is presented for selecting, designing, and sizing one or several passive mine drainage treatment systems that can be used in remediation of abandoned mine lands (AML). The three principal types … Read more
How to properly shock a well for coliform or e.coli bacteria is a question that comes up on a daily basis. So I’ll go through a few steps on how to do it correctly. Step #1 Flush well for 10 minutes, longer if well is over 150ft deep. Step #2 Size your well. Your well … Read more
Environmental issues impact every aspect of industrial development and production today. Mining, although removed from many of the harsher environmental standards and costs felt by other industries since the advent of RCRA legislation, has found itself under increasing scrutiny by state and federal regulators. This is particularly so when the effects of mining migrate beyond … Read more
Mining activities were typified by surface exploratory drilling identifying ore distribution and extension of underground workings to the lead and zinc deposits outlined. Exploration holes were either left unplugged or plugged at the surface with a section of a telephone pole. Low grade ore and waste rock were discarded in rained out portions of drifts. … Read more
Man’s activity in developing, operating, and abandoning a mine often affects the quality of the ground water and surface water. Acid water drainage from mines is an example of an impact from mining that results in degradation of ground and surface water. New flow systems are created by the mining activity. The mining made possible … Read more
Ion Exchange Resin Manufacturing To understand the parameters involved we need to know the ingredients and how they can affect physical and chemical stability of the finished resin. The main ingredients used to make strong acid cation (SAC) resins are styrene (S)(also known as ethenylbenzene, vinylbenzene, and phenylethene), divinylbenzene (DVB) and sulfuric acid (H2SO4). Since … Read more
Ion Exchange resins break down due to physical attrition or chemical attack here we will focus on the mechanisms by which cation resins break down. Physically, resins shrink and swell during exhaustion and regeneration cycles. For strong acid cation resin commonly used in commercial/industrial softeners the volume change is in the 5-7% range. This “shrinking … Read more
Off the radar grow-ups have a history of being just that “off the radar”, low key often clandestine operations without much regulations or standards. When medicinal cannabis became legal in Canada in 2016 and recreational use in 2018 it brought about regulations and standards that were unheard of, while marijuana strains were always discussed, the … Read more