Author_Institution :
Civil Eng. & Archit. Dept., Wuhan Univ. of Technol., Wuhan, China
Abstract :
Twelve samples of surface sediment in Nanhu Lake, Wuhan city were collected and the concentrations of Organic Matter (OM), Total Nitrogen (TN), Total Phosphorus (TP), ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) were determined; the average result were 6.58%, 3972, 1712, 897 and 20mg/kg separately. Cd, Hg, As, Cu, Pb, Cr and Zn were determined too; and the average value were 0.46, 0.140, 19.3, 45.8, 57.3, 53.3 and 90.3mg/kg respectively. The content of pH, TN, TP and NH4+-N in overlying water and pore water were tested, the concentrations of TN and NH4+-N were higher and TP were less in pore water than that in overlying water, which meant that TN and NH4+-N in sediment could release into water and TP couldn´t. The contaminants values of surface sediment near the biggest sewage outlet were much higher than that of others. When evaluating the surface sediment with organic index and organic nitrogen and pollution load index, the results showed organic pollution was heavy and heavy metals pollution was moderate.
Keywords :
arsenic; cadmium; chromium; copper; lakes; lead; mercury (metal); nitrogen compounds; organic compounds; oxygen; phosphorus; sediments; wastewater; water pollution measurement; water quality; zinc; As; Cd; China; Cr; Cu; Hg; NH4+; NO3-; Nanhu lake; O; P; Pb; Wuhan city; Zn; ammonia nitrogen concentration; heavy metal pollution; nitrate nitrogen concentration; organic matter concentration; organic pollution; pollution characteristics; pollution load index; sewage outlet; surface sediment evaluation; total nitrogen concentration; total phosphorus concentration; Chromium; Cities and towns; Lakes; Mercury (metals); Nitrogen; Sediments; Surface contamination; Testing; Water pollution; Zinc;
