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Q3 (a) Describe briefly the main objective water quality and state the main parameters involved in water quality analysis. (b) Determine the equivalent weight, concentration of each ion in mg/L as CaCO3 and total hardness of the following water sample in Table Q3 (b). (c) 50 mL of wastewater sample has been diluted in a 300 mL BOD bottle for BOD5 20°C analysis. Assume that initial DO is 8.8 mg/L, whilst DO at the end of 5 days is 4.5 mg/L, calculate the dilution factor (P) and estimate the value of BOD5 20°C for the wastewater sample.

Q3 (a) Describe briefly the main objective water quality and state the main parameters involved in water quality analysis. (b) Determine the equivalent weight, concentration of each ion in mg/L as CaCO3 and total hardness of the following water sample in Table Q3 (b). (c) 50 mL of wastewater sample has been diluted in a 300 mL BOD bottle for BOD5 20°C analysis. Assume that initial DO is 8.8 mg/L, whilst DO at the end of 5 days is 4.5 mg/L, calculate the dilution factor (P) and estimate the value of BOD5 20°C for the wastewater sample.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Q3 (a) Describe briefly the main objective water quality and state the main
parameters involved in water quality analysis.

(b) Determine the equivalent weight, concentration of each ion in mg/L as CaCO3
and total hardness of the following water sample in Table Q3 (b).

(c) 50 mL of wastewater sample has been diluted in a 300 mL BOD bottle for
BOD5 20°C analysis. Assume that initial DO is 8.8 mg/L, whilst DO at the end of
5 days is 4.5 mg/L, calculate the dilution factor (P) and estimate the value of
BOD5 20°C for the wastewater sample. 

Periodic Table of the Elements 1 18 IA VIIIB group classification atomic number . IA II- oxidation state(s) 13 14 15 16 17 Не 4.00 IIA H symbol L.01 VIB VIIB 1.01 IIIB IVB VB 3 1 4 Li Be 9.01 5 3 6 +42 7t3,54,2 8 N -2|9 B 10.8 -110 Ne 20.2 F 6.94 atomic mass 12.0 14.0 16.0 19.0 I 12 2 Mg 24.3 1 20 9 10 11 12 13 Al 3 4 5 6 7 8 3 14 4 15 5.3 16 642 |17 +1.3.5 18 Na Si P S CI 35.5 Ar 23.0 IIIA IVA VA VIA VIIA VIIIA VIIIA VIIIA IB HB 27.0 28.1 31.0 32.1 39.9 2 '21 Ca 3 22 4,3 23 5,4 24 3,6 25 24 26 3,2 27 2,3 28 2.3 29 2.1 30 2 31 Ti 19 3 32 4 33 t35 4 f2 35 t15 36 K Sc V Cr 52.0 Mn Fe 55.8 Co 58.9 Şe Ni Cu Zn 65.4 Ga Ge As Br Kr 39.1 40.1 45.0 47.9 50.9 54.9 58.7 63.5 69.7 72.6 74.9 79.0 79.9 83.8 37 1 38 Rb 2 39 3 40 4 41 5.342 6,4 43 7 Sr Y 87.6 88.9 14 4.3,2 45 34 46 2.4 47 Te Ru 1 48 2 49 3 50 4,2 s1 L35 2 64,2 53 +1,5 54 Zr Nb Mọ Rh Pd Ag Cd In Sn Sb Те Xe 85.5 91.2 92.9 95.9 (99) 101 103 106 112 115 119 122 128 127 131 55 1 56 2 57 3 72 4 73 5 74 6,4 75 7 76 4.32 77 4,6 78 4.2 79 3,1 80 2,181 1,3 82 2,4 83 3.5 84 Hf Tạ 85 1 86 Cs Ba La W Re Ir Os 190 Pt Au Hg 201 TI Pb Bi Po At Rn 133 137 139 178 181 184 186 192 195 197 204 207 209 (209) | (210) (222) | 88 Fr Ra (223) 87 2 89 3 104 4 105 106 107 108 109 12 Mt Uun Uuu Uub (268) (269) (272) (277) 110 111 14 116 T18 Ac Rf Db Sg Bh Hs Uuq (289) Uuh Uuo (226) (227) (261) (262) (263) (264) (265) (289) (293) 58 3,4 59 4,3 60 3 61 3 62 32 63 3,2 64 3 j65 3,4 66 3 67 Ce 3 68 3 69 3.2 70 3,2 71 Yb 173 3 lanthanides Pr Nd Pm Sm Eu Gd Dy 163 3 97 3,4 98 3 99 Cf Tb Ho Er 167 Tm Lu 140 141 144 (145) 150 152 157 159 165 169 175 90 4 91 5,4 92 6,54 93 S46 94 456 95 3456 96 3 100 3, 101 2,3 102 2,3 103 3 Es Fm Md No Lr (258) (259) (262) actinides Th 232 Np Am Cm Bk Pa U 238 Pu 231 (237) (244) (243) (247) (247) (251) (252) (257) see Appendix A. Tuble A.1 for element names
Transcribed Image Text:Periodic Table of the Elements 1 18 IA VIIIB group classification atomic number . IA II- oxidation state(s) 13 14 15 16 17 Не 4.00 IIA H symbol L.01 VIB VIIB 1.01 IIIB IVB VB 3 1 4 Li Be 9.01 5 3 6 +42 7t3,54,2 8 N -2|9 B 10.8 -110 Ne 20.2 F 6.94 atomic mass 12.0 14.0 16.0 19.0 I 12 2 Mg 24.3 1 20 9 10 11 12 13 Al 3 4 5 6 7 8 3 14 4 15 5.3 16 642 |17 +1.3.5 18 Na Si P S CI 35.5 Ar 23.0 IIIA IVA VA VIA VIIA VIIIA VIIIA VIIIA IB HB 27.0 28.1 31.0 32.1 39.9 2 '21 Ca 3 22 4,3 23 5,4 24 3,6 25 24 26 3,2 27 2,3 28 2.3 29 2.1 30 2 31 Ti 19 3 32 4 33 t35 4 f2 35 t15 36 K Sc V Cr 52.0 Mn Fe 55.8 Co 58.9 Şe Ni Cu Zn 65.4 Ga Ge As Br Kr 39.1 40.1 45.0 47.9 50.9 54.9 58.7 63.5 69.7 72.6 74.9 79.0 79.9 83.8 37 1 38 Rb 2 39 3 40 4 41 5.342 6,4 43 7 Sr Y 87.6 88.9 14 4.3,2 45 34 46 2.4 47 Te Ru 1 48 2 49 3 50 4,2 s1 L35 2 64,2 53 +1,5 54 Zr Nb Mọ Rh Pd Ag Cd In Sn Sb Те Xe 85.5 91.2 92.9 95.9 (99) 101 103 106 112 115 119 122 128 127 131 55 1 56 2 57 3 72 4 73 5 74 6,4 75 7 76 4.32 77 4,6 78 4.2 79 3,1 80 2,181 1,3 82 2,4 83 3.5 84 Hf Tạ 85 1 86 Cs Ba La W Re Ir Os 190 Pt Au Hg 201 TI Pb Bi Po At Rn 133 137 139 178 181 184 186 192 195 197 204 207 209 (209) | (210) (222) | 88 Fr Ra (223) 87 2 89 3 104 4 105 106 107 108 109 12 Mt Uun Uuu Uub (268) (269) (272) (277) 110 111 14 116 T18 Ac Rf Db Sg Bh Hs Uuq (289) Uuh Uuo (226) (227) (261) (262) (263) (264) (265) (289) (293) 58 3,4 59 4,3 60 3 61 3 62 32 63 3,2 64 3 j65 3,4 66 3 67 Ce 3 68 3 69 3.2 70 3,2 71 Yb 173 3 lanthanides Pr Nd Pm Sm Eu Gd Dy 163 3 97 3,4 98 3 99 Cf Tb Ho Er 167 Tm Lu 140 141 144 (145) 150 152 157 159 165 169 175 90 4 91 5,4 92 6,54 93 S46 94 456 95 3456 96 3 100 3, 101 2,3 102 2,3 103 3 Es Fm Md No Lr (258) (259) (262) actinides Th 232 Np Am Cm Bk Pa U 238 Pu 231 (237) (244) (243) (247) (247) (251) (252) (257) see Appendix A. Tuble A.1 for element names
TABLE Q3 (b) Water sample characteristic Ion Concentration (mg/L) Ca Mg* 2+ 88 2+ 50 HCO'3 255 2- 33 85.5 53
Transcribed Image Text:TABLE Q3 (b) Water sample characteristic Ion Concentration (mg/L) Ca Mg* 2+ 88 2+ 50 HCO'3 255 2- 33 85.5 53
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