Comparison of Cu Heavy Metal Concentration in Mangrove Waters and Tambak Wedi Estuary Surabaya

The waters of the Tambak Wedi Mangrove are a stream from the Tambak Wedi Estuary in Surabaya which has the potential to be contaminated with the heavy metal Cu contained in waste from the Surabaya City area. Industrial activities and activities around the harbor as shipping traffic routes have negative impacts that trigger water pollution by the heavy metal Cu. This research aims to analyze the comparison of water quality between Mangrove Waters and Muara Tambak Wedi Surabaya based on levels of the heavy metal Cu. Water samples were taken for testing Cu levels at each of the two locations which is 5 stations. Testing for Cu heavy metal levels was carried out at the Nutrition Laboratory, Airlangga University using AAS. The results of testing for Cu heavy metal levels were analyzed descriptively and then compared with the quality standards of PP RI No. 22 of 2021. Comparison of water quality at the two locations was analyzed using the T test. The research results showed that the levels of the heavy metal Cu in Mangrove Waters ranged from 0.011-0.015 and 0.001-0.003 in Tambak Wedi Estuary Surabaya. The results of the T test analysis show a significant value of 0.00, which means there is a significant difference in the results of testing Cu levels in Mangrove Waters and Tambak Wedi Estuary Surabaya. Both waters are contaminated with the heavy metal Cu.