Metagenomic and culture-dependent approaches unveil active microbial community and novel functional genes involved in arsenic mobilization and detoxification in groundwater

Table 2 Hydrogeochemical characteristics of groundwater samples collected from Munshiganj and Chandpur district, Bangladesh

Division	District and Upazila	Location (Union)	Coordinates	GW Sample	Depth of well (m)	T (^oC)	pH	Conductivity (µS/cm)	DO	TDS	Alkalinity as CaCO₃ (mg/L)	Dissolved trace elements (mg/L)
Division	District and Upazila	Location (Union)	Coordinates	GW Sample	Depth of well (m)	T (^oC)	pH	Conductivity (µS/cm)	DO	TDS	Alkalinity as CaCO₃ (mg/L)	As	Fe	Mn	Ca	K	NO₂⁻	SO₄⁻
Dhaka	Munshiganj (Srinagar Upazila)	Sholaghar	23.5543° N, 90.2917° E	M1	103.63	28.1	6.45	473	3.43	220	250	0.27	4.97	0.267	40.47	70.12	< 3	< 4
		Sholaghar	23.5543° N, 90.2917° E	M2	121.92	28	6.5	419.67	4.36	264	241	0.19	7.24	0.184	30.80	91.64	< 3	< 4
		Birtara	23.5667° N, 90.3167° E	M3	97.536	27.9	6.42	567.5	2.9	298	250	0.20	8.39	0.291	5.46	151.29	< 3	< 4
		Birtara	23.5667° N, 90.3167° E	M4	243.84	27.8	5.77	1813.38	4.18	210	183.34	0.05	1.84	1.955	131.02	594.5	< 3	< 4
Chattogram	Chandpur (Kachua Upazila)	Ashrafpur	23.2781° N, 90.9773° E	C1	101.25	26.1	7.6	2.22	1.38	1228	ND	0.25	0.04	ND	21.14	9.213	4.26	< 4
Chattogram	Chandpur (Kachua Upazila)	Ashrafpur	23.2781° N, 90.9773° E	C2	95.63	26.1	7.54	850	2.8	449	ND	0.23	0.03	ND	2.03	9.52	3.70	< 4

ND: Not determined; WHO standard limit for drinking water (4^th Edition): Temperature: 30⁰C; pH: 7- < 8; Conductivity: ≤ 4 00 µS/cm Dissolve oxygen (DO): 5 mg/L; TDS: 500 mg/L to ≤ 1000 mg/L; Alkalinity: 200 mg/L to ≤ 600 mg/L; As: 0.05 mg/L for BD; Mn: .01 mg/L; Ca: 75 mg/L; K: 12 mg/L; Nitrite (NO₂⁻): 3 mg/L; Sulfate (SO₄⁻): 250 mg/L

ISSN: 1471-2180