TITLE:
Examination of the Level of Heavy Metals in Wastewater of Bandar Abbas Wastewater Treatment Plant
AUTHORS:
Gholamreza Mansourri, Mehrzad Madani
KEYWORDS:
Urban Wastewater, Bandar Abbas, Heavy Metals, Treatment Plant
JOURNAL NAME:
Open Journal of Ecology,
Vol.6 No.2,
January
19,
2016
ABSTRACT: One of
the main environmental pollutants is heavy metals. Due to extensive usage in
industry, these metals enter biological cycle rapidly and contaminated water
and soil resources rapidly. In this work, lead, copper, zinc and chromium of
Bandar Abbas wastewater are examined. For this research, nine stations were set
for measurement in urban level in Bandar Abbas and sampling of aforesaid metals
was performed in fall and winter 2006 in these stations. After extraction and
preparation operations using APDC-MIBK, samples were measured using flame
atomic absorption system. According to results, concentrate of studied metals
was lower than allowable standard value set by Iran environmental protection
organization for agricultural purposes and sewage to ground level waters. In
addition, efficiency of Bandar Abbas wastewater treatment plant to remove these
metals is 40% - 70% from which highest removal is for zinc as much as 71.1% and
lowest level is for copper as much as 40.5%. However, copper level was higher
than allowable level for agricultural purposes in spring and summer (0.21 mg/L
and 0.23 mg/L, respectively) and lower in fall and winter (0.103 mg/L and 0.098
mg/L, respectively). Furthermore, changes in concentration of metals in these
stations in various seasons were measured and analyzed using one-way variance
analysis and simultaneous effects of time and place on measured variables were
analyzed using two-way variance analysis.