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All issues Volume 30 / No 3 (June 2025) Wuhan Univ. J. Nat. Sci., 30 3 (2025) 302-312 Full HTML
Open Access

Table 2

Annual average data from 2018 to 2022

Year pH NH3-N F Cd Cr(Ⅵ) Hg
2018 7.705 649 038 2.218 877 358 0.793 355 172 0.002 103 718 0.017 436 180 0.000 052 200
2019 7.596 832 579 17.407 902 440 1.013 375 000 0.009 976 583 0.015 895 943 0.000 206 735
2020 7.611 994 135 11.950 289 470 1.071 107 692 0.012 171 297 0.031 627 435 0.000 082 500
2021 7.528 308 605 3.944 491 324 1.281 439 560 0.005 669 974 0.203 736 393 0.000 229 193
2022 7.542 894 988 3.012 403 175 0.983 992 366 0.006 857 291 0.014 607 706 0.000 132 766
Year COD VH Sul Pb Cya As
2018 41.194 497 61 0.008 844 000 0.015 857 143 0.013 748 431 0.007 033 898 0.009 732 093
2019 58.636 595 74 0.017 628 571 0.011 500 000 0.029 205 373 0.033 862 791 0.023 159 138
2020 47.614 619 88 0.024 967 857 0.057 333 333 0.022 938 481 0.007 315 789 0.000 846 242
2021 43.631 120 94 0.018 758 727 0.035 314 286 0.034 279 444 0.010 504 878 0.004 046 790
2022 40.334 080 46 0.015 626 923 0.007 288 889 0.031 125 277 0.011 013 559 0.003 531 145
Year Pet Cu BOD5 Zn AnS TP
2018 0.242 833 333 0.025 690 392 13.588 019 80 0.037 261 143 0.438 692 308 0.701 116 667
2019 0.288 000 000 0.048 353 023 19.010 683 23 0.061 352 187 0.731 400 000 0.375 273 810
2020 0.428 779 817 0.050 450 490 13.851 808 51 0.096 942 279 0.436 705 882 0.242 118 881
2021 0.219 280 702 0.057 808 904 14.187 259 62 0.058 896 296 0.499 822 581 0.359 455 128
2022 0.377 697 368 0.025 273 939 11.286 042 30 0.029 614 194 0.229 783 784 0.431 660 465

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