Table 3.

Descriptive analysis of heavy metals in the vegetable, soil, and water samples

	Vegetables*					Corresponding soil*					Corresponding water**
	Pb	Cu	Fe	Ni	Zn	Pb	Cu	Fe	Ni	Zn	Pb	Cu	Fe	Ni	Zn
Mean	5.5664	3.3585	4.7486	2.9548	5.2755	5.471	6.3282	14.500	2.7120	4.5624	0.0002	2.5116	0.0066	1.3828	2.6072
SD	3.2414	2.2216	2.0185	1.6351	2.9970	2.0796	2.0193	3.2555	0.8126	2.5571	0.0007	1.2538	0.0128	0.7567	1.4348
5	1.9272	0.2882	1.9522	0.3777	1.1693	–	–	–	–	–	–	–	–	–	–
10	2.4372	0.5259	2.3724	0.6896	1.8887	2.564	2.2217	9.522	1.6046	1.8035	0	0.5257	0.001	0.2509	0.8688
25	3.5393	1.4546	3.0569	2.0119	2.8274	4.1485	5.6120	12.03	1.7782	2.8296	0	1.2358	0.001	1.0045	1.45
Median	4.999	3.3548	4.33	2.8269	4.8693	5.15	7.208	14.46	2.8902	3.9138	0	2.8803	0.003	1.1667	2.5676
75	6.5617	4.8814	6.17	3.8013	7.1527	6.25	7.5368	17.1844	3.4172	6.3088	0	3.5382	0.008	1.9302	3.5817
90	9.6448	6.3296	8.0379	5.4317	9.9799	9.206	8.0096	18.876	3.9637	9.4359	0.0013	3.8078	0.0262	2.5155	4.9731
95	13.5038	6.8214	8.6262	6.4094	10.6616	–	–	–	–	–	–	–	–	–	–
Geometric mean	4.79	2.42	4.34	2.31	4.28	5.11	5.7	14.13	2.59	3.97	0	1.97	0	0.98	2.23

*the content of heavy metals in vegetable and soil samples are calibrated based on mg/kg **the unit of heavy metals in water samples is mg/L