Fig. 2. Concentration of (a) NH₃–N, (b) NO₃–N, and (c) total P in leachate from oil-spiked control and treated sediments. For Inipol (Ip) samples treated with Ip only, the total organic nitrogen was determined as ammonia nitrogen using a Kjeldahl method, meaning there is no NO₃–N data in (b). C, control; Ip, Inipol; Os, Osmocote; SN, soluble nutrients.

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