New PDF release: Activated Carbon: Solutions for Improving Water Quality

By Zaid Chowdhury

ISBN-10: 1583219072

ISBN-13: 9781583219072

ISBN-10: 1613002025

ISBN-13: 9781613002025

This publication specializes in the ideas activated carbon filtering presents, together with the demanding situations dealing with water services to supply secure water. whereas demonstrating the worth of activated carbon in tough instances, insurance comprises utilities stories and purposes plus a number of layout and procurement techniques. Appendices comprise case reviews and existence cycle exams

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Additional resources for Activated Carbon: Solutions for Improving Water Quality

Example text

S. Summers. 1988. Activated carbon for water treatment, 2nd ed. Karlsruhe, Germany: DVWG Forschungsstelle. 2 Chapter 1 Fundamentals of Adsorption Adsorption is used in water treatment to remove dissolved contaminants by physical phase separation in either a steady-state (PAC) or a nonsteady-state (GAC) process. Adsorbates accumulate on the surface of the adsorbent until the adsorption capacity is consumed. In the PAC process, the PAC is removed from the water treatment stream as a process solids residual.

The solid-phase concentration is calculated directly from Eq 1-3 or 1-4. 3 mg atrazine g  Thus the GAC in the PFR adsorbs over twice the amount of atrazine per mass of activated carbon compared to the PAC in a CFSTR. The PFR is a more efficient reactor. Another way of comparing the efficiency of the PAC in a CFSTR to GAC in a PFR is the use rate. Table 1-3 defines the use rate in two different forms for each reactor: mass of AC per volume of water treated or mass of AC used per day. As such, lower use rates are more favorable.

Constant fractional removal was found in both waters and has also been reported for the odorant MIB, the pesticide atrazine, the antibiotic sulfamethoxazole, and the hormone estradiol at concentrations in the low to sub μg/L range (Summers et al. 2010). PAC Application Figure 2-1 shows the common points of PAC application in conventional surface water treatment plants. The PAC can be metered into the water in the dry, as-received form or premixed into treated plant water and added as a slurry. In a 1997 survey (Graham et al.

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Activated Carbon: Solutions for Improving Water Quality by Zaid Chowdhury


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