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24 Chapter 1: Introduction

                               (c) What is  (-&),  the average total rate of chlorophenol destruction over the whole interval?
                               (d) What would  (-&)  be for a  1@m3  holding pond under the same conditions?
                               (e) If the concentration must be reduced to 0.06 mg  L-’  to meet environmental standards, how
                                  long would it take to treat a 0.34 mg  L-l  solution?
                                                               )
                                  (i) 2 days;  (ii) less than 2 days;  (iii more than 2 days. State any assumptions made.
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