In each case 60-70 g of coal or coal fraction was mixed with 140-150 ml 2-methoxyethanol and then it was leached in sealed flasks at a room temperature for a period of 20 months.
The brown coal was being leached in the mentioned way both in 2-methoxyethanol and in carbon tetrachloride.
The copper retention and the amount of copper leached in treated cubes increased with the copper concentration in treated solution.
Regression analysis was performed to establish correlations between the cumulative amount of copper leached in the 318-hour leaching test and copper retentions in wood.
However, there was no significant difference (P > 0.05) in the amount of N leached in these urine treatments between the 2 years, even though there was a trend of higher leaching loss in the second year in the DE 400 + urine 1000A treatment.
Therefore, there was no significant difference in the amount of N[O.sub.3.sup.-]-N leached in the urine treatments between the 2 years.
Subsequently, a field study of various landfills would be tested, using upgradient and downgradient groundwater wells to determine if those organics leached in
the laboratory were found in the groundwater at those landfills.
Pine cubes (19 mm) were vacuum-treated, conditioned, and leached in deionized water according to the American Wood-Preservers' Association (AWPA) standard E11-97.
The overall trends are similar for each preservative formulation: chromium is leached in the smallest amounts, copper leaching is slightly greater, and the third component (As, Mo, W, or Zn) is the most extensively leached metal.
As a result of the fairly small quantities of N leached in
the first year, it was decided to increase N loading in the second year to within this range (213 mg/L).
Xylenes were the most common compounds leached in
the laboratory procedure; some xylene was found in the leachate from all nine binder systems sampled.
For copper amine-treated blocks, the greatest leaching resistance was found for copper monoethanolamine and copper polyimine treatments, which retained more than 80 percent copper when leached in
water and more than 50 percent when leached with a citrate buffer.