The loading capacities of several types of cation exchange resin and activated carbon for gold-thiourea complex has been evaluated. The maximum loading capacity after 96 hours at ambient temperature (22°C) ranged from 189 to 243 kg Au/t for the cation exchange resins and 159 to 208 kg Au/t for the activated carbons.

What is total exchange capacity?

The total number of cations a soil can hold–or its total negative charge–is the soil’s cation exchange capacity. The higher the CEC, the higher the negative charge and the more cations that can be held. CEC is measured in millequivalents per 100 grams of soil (meq/100g).

What is mEq ml mean?

Some medical tests report results in milliequivalents per litre (mEq/L). An equivalent is the amount of a substance that will react with a certain number of hydrogen ions. A milliequivalent is one-thousandth of an equivalent. A litre measures fluid volume.

### What is the unit of ion exchange capacity?

ion-exchange capacity, measure of the ability of an insoluble material to undergo displacement of ions previously attached and loosely incorporated into its structure by oppositely charged ions present in the surrounding solution.

What is meant by total exchange capacity of ion exchanger?

Definitions. In general terms, the capacity of an ion exchange resin can be expressed as the quantity of ions that can be taken up by a specific volume of the resin.

What is a good CEC number?

Generally, the CEC is lowest at soil pHs of 3.5 to 4.0 and increases as the pH is increased by liming an acid soil, as shown in Figure 2. Because CEC may vary considerably with soil pH, it is a common practice to measure a soil’s CEC at a pH of 7.0.

## How do you calculate mEq to ml?

Cross Multiply: 40 mEq * Xml = 10 mEq * 200 ml. Now calculate the drip rate for the infusion….Medication Calculation.

1 kilogram (kg) 2.2 pounds (lb)
1 gram (g or gm) 1000 mg (milligrams)
1 milligram (mg) 1000 micrograms (mcg)
1 gram (gm) 1 ml (milliliter)
1 cc (cubic centimeter) 1 ml (milliliter)

Why is ion exchange capacity important?

Cation exchange capacity (CEC) is a useful indicator of soil fertility because it shows the soil’s ability to supply three important plant nutrients: calcium, magnesium and potassium.

What is a low CEC value?

Generally, the CEC is lowest at soil pHs of 3.5 to 4.0 and increases as the pH is increased by liming an acid soil, as shown in Figure 2.

### What does high CEC mean?

How many mEq are in 1ml?

How many mEq are in a ML?

## What is the capacity of an ion exchange resin?

In general terms, the capacity of an ion exchange resin can be expressed as the quantity of ions that can be taken up by a specific volume of the resin. This would be expressed in quantity per unit volume such as kilograins per cubic foot (Kgr/ft 3 ), milli-equivalents per milliliter (meq/ml), which also equals equivalents per liter (eq/l).

What is useful capacity of a resin?

Also called useful capacity, it is the number of ion exchange sites where exchange has really taken place during the loading run. It is also the number of resin charges — not the number of ions because some ions have more than one charge — picked up by the resin in one cycle.

What is the EW of a calcium ion exchanger?

Calcium (Ca), for instance has a molecular weight of 40 and is divalent (2) so the EW is 20 (40/2 = 20). An ion exchanger with a capacity of 1.95 eq/l would therefore have a capacity to remove 1.95 x 20 = 39 grams of calcium per liter of resin or 1.1 kilograms (k) or 2.43 lbs of calcium/ft 3.

### What is qualitative capacity in ion exchange?

In ion exchange processes, we define not only the quantitative capacity of the resin (as total capacity), but the qualitative capacity as well (as operating capacity or column capacity). In other words, how much work can the resin do in removing a certain element (contaminant) to a given breakpoint?