Assessment of the Nutrients in the Leachate and the Groundwater Quality for Drinking and Farming around the Nkolfoulou Landfill in Yaoundé, Cameroon

Table 5

Physicochemical characteristics of groundwater in the long wet season.

Parameter	Sampling point													Mean	SD
	T (°C)	23.1	23.0	23.4	23.3	23.5	23.0	23.3	23.3	23.2	23.4	23.5	23.0			23.4	23.3	0.2
pH	6.1	6.2	5.8	5.9	6.1	6.2	6.4	6.1	6.3	5.9	6.4	6.3	6.1	6.1	0.2
EC (μS/cm)	30	80	50	40	30	50	30	20	150	50	50	30	50	51	34
TDS (mg/L)	10	40	20	10	10	20	10	10	70	200	20	10	20	35	53
Turbidity (NTU)	8.23	0.7	1.4	1.2	14.53	1.1	7.45	0.7	4.6	2.1	6.31	0.8	2.38	3.96	4.16
TSS (mg/L)	58.79	5.00	10.00	8.57	103.79	7.86	53.21	5.00	32.86	15.00	45.07	7.00	17.00	28.40	29.63
TH (mg/L)	24.73	20.37	34.21	44.90	42.16	23.02	13.80	22.75	31.91	31.12	11.14	22.53	14.40	25.93	10.47
TA (mg·/L)	28.5	23.8	38.0	53.3	42.8	23.8	19.0	23.8	35.0	33.3	14.3	27.5	19.0	29.39	10.86
(mg/L)	0.85	1.32	2.31	0.97	1.26	1.03	1.56	1.06	0.03	0.90	1.26	1.31	1.42	1.18	0.51
(mg/L)	2.11	1.63	2,65	8.44	2.86	1.23	1.20	1.50	1.27	1.41	1.75	2.41	1.45	2.30	1.93
(mg/L)	4.06	2.29	1.90	1.36	4.58	0.55	2.03	0.61	0.73	1.55	1.83	2.28	2.01	1.98	1.20
(mg/L)	3.21	4.38	10.57	15.74	9.34	8.32	2.18	8.11	11.58	9.90	1.45	5.26	2.45	7.11	4.34
(mg/L)	0.50	ND	0.73	0.40	0.10	0.03	0.31	ND	0.02	0.14	ND	0.06	0.05	0.23	0.24
(mg/L)	1.03	0.16	3.51	7.97	4.77	3.44	1.96	1.36	0.07	1.46	0.63	1.27	2.10	2.29	2.19
(mg/L)	0.03	0.06	0.05	0.10	0.06	0.04	0.01	0.02	0.03	0.02	0.03	0.03	0.05	0.04	0.02
(mg/L)	0.37	0.21	0.85	0.91	0.51	0.72	0.31	0.73	0.15	0.39	0.37	0.55	0.32	0.49	0.24
(mg/L)	0.25	1.97	1.24	3.60	1.08	0.79	0.11	0.3	0.03	0.21	0.07	0.35	0.14	0.78	1.02
(mg/L)	ND	ND	0.02	ND	0.01	0.03	0.01	ND	0.02	0.01	ND	ND	ND	0.02	0.01
(mg/L)	34.8	29.0	46.4	64.96	52.2	29.0	23.2	29.0	42.7	40.6	17.4	33.5	23.2	35.84	13.24
WQI	103.16	11.53	86.59	56.59	104.08	15.50	78.13	9.98	35.00	32.28	42.69	16.21	26.22	47.53	34.66
SAR	0.07	0.13	0.17	0.06	0.08	0.09	0.18	0.10	0.00	0.07	0.16	0.12	0.16	0.11	0.05

ND = not detected; SD = standard deviation.