Monitoring of the changes in potential environmental risk of some heavy metals in water and sediments of Burullus Lake, Egypt

Bulletin of the National Research Centre

Table 8 Statistical analysis of heavy metals during 2010, 2012, and 2015

Year	Statistical analysis	Fe	Mn	Zn	Cu	Ni	Cr	Pb	Cd
2010	Min	95	35	48	8	1	1	12	1.6
	Max	430	99	552	33	10	13	68	8.5
	Average	263	64	252	23	4	5	45	4
	St. dv	234	94	174	41	18	22	58	19
2012	Min	96	13.5	27.7	7.2	6.6	3.3	31.2	0.3
	Max	272	71.5	190.9	199.8	14.5	8.6	91.5	7.7
	Average	145	45	80	47	9	5	41	3
	St. dv	182	68	72	72	23	20	47	16
2015	Min	100	13	54	18	1	1	22	1.1
	Max	230	39	246	124	10	12	78	2.5
	Average	148	22	108	68	4	5	46	2
	St. dv	134	34	74	70	19	20	48	17