Journal of Chemistry

Research Article

Physicochemical Characterization and Evaluation of Seasonal Variations of Landfill Leachate and Groundwater Quality around Tanjaro Open Dump Area of Sulaymaniyah City, Kurdistan, Iraq

Table 3

Physicochemical parameters of three leachate samples collected from Tanjaro dumping during four seasons during (2021-2022).


	L1			L2			L3
	Min.	Max.	Mean ± SD	Min.	Max.	Mean ± SD	Min.	Max.	Mean ± SD

Temp	13	28.5	20.63 ± 6.45	7	21.8	14.53 ± 7.14	8	21.9	16.40 ± 6.70
pH	5.9	6.4	6.08 ± 0.24	7.3	8.6	8.01 ± 0.60	7.06	8.3	7.72 ± 0.55
EC	85328.36	297298.5	144515 ± 102466	30522.39	160716.4	77019 ± 59068	352	608	499 ± 119
TDS	57170	199190	96825 ± 68652	20450	107680	51603 ± 39575	550	950	779 ± 186
TA	23600	50000	33180 ± 12004	12900	30000	18285 ± 7893	760	15000	4359 ± 7094
TH	12400	40000	22080 ± 12335.06	5300	20000	12525 ± 6011.863	751	30000	8731.25 ± 14234
BOD₅	270.6	4554	2596 ± 1831	348	11100	3257 ± 5234	184.8	379.5	302 ± 91
COD	381.546	7331.94	4151.971 ± 2967.092	490.68	18204	5304.87 ± 8607.63	260.568	607.2	474.942 ± 161.1
BOD₅/COD	0.625221			0.61387			0.636551
Cl⁻	6920	15000	9293 ± 3859	5650	15500	10913 ± 4473	240	6500	1831 ± 3113
NO₃⁻	1153	4990	2321.75 ± 1790.627	717	3589	2273 ± 1447	65.2	4871	1398 ± 2322
SO₄²⁻	653	8673	3569 ± 3610	265	11224	5040 ± 5251	108	6887	1988 ± 3277
PO₄³⁻	27	88	48 ± 27	18	110	59 ± 43	5	79	28 ± 35
Ca	4400	15200	8103 ± 4825	1280	7200	3785 ± 2552	172	8800	2728 ± 4069
Mg	486	2600	1250 ± 927	371	510	439 ± 70	75	1944	554 ± 927
Na	375	10000	4544 ± 4733	720	17000	6868 ± 7712	100	2500	775 ± 1153
K	304	3600	1756 ± 1566	233	5000	2121 ± 2052	8	1260	332 ± 619
Cr	0.18	1.4	0.5325 ± 0.5832881	0.16	4.88	1.62 ± 2.205826	0.01	0.02	0.0125 ± 0.005
Mn	43.1	100.25	74.0325 ± 30.47551	0.16	4.88	1.62 ± 2.205826	0.07	1.77	0.573 ± 0.81037
Ni	0.28	2.33	1.29 ± 1.127445	0.11	4.1	1.3425 ± 1.871138	0.01	0.02	0.0125 ± 0.005
Cu	0.01	0.11	0.04 ± 0.046904	0.07	0.44	0.2475 ± 0.18482	—	—	—
Fe	39.64	152.15	83.45 ± 54.08593	6.52	24.67	14.4 ± 7.657271	0.01	0.33	0.1425 ± 0.1513
Co	0.07	0.615	0.30375 ± 0.255974	0.02	0.73	0.25 ± 0.329545	—	—	—
Zn	0.44	1.69	0.9325 ± 0.54027	0.89	3.72	1.81 ± 1.328734	0.01	0.44	0.1625 ± 0.1899
As	0.01	0.1	0.0375 ± 0.04272	0.05	0.37	0.18 ± 0.136137	—	—	—
Pb	0.01	0.06	0.025 ± 0.023805	0.01	0.09	0.0375 ± 0.03594	—	—	—
Se	0	0.02	0.01 ± 0.008165	0.01	0.02	0.0125 ± 0.005	—	—	—

(all concentrations are given in mg·L⁻¹, except pH), EC (μS·Cm⁻¹), and Temp. (°C).