Analisis Kadar Logam Berat Timbal (Pb) dan Protein Pada Rumput Laut (Caulerpa racemosa) di Pantai Joko Mursodo,Lohgung, Lamongan

Analisys Of Lead Metal (Pb) And Protein Currency in Seaweed (Caulerpa racemosa) At Joko Mursodo Island, Lohgung, Lamongan

Pencemaran logam berat timbal (Pb) pada perairan laut dapat disebabkan oleh adanya kegiatan pelabuhan. Rumput laut adalah salah satu biota yang dapat mengakumulasi logam berat Pb yang terdapat di lingkungannya. Penelitian ini bertujuan untuk mengetahui kadar logam berat pada perairan, sedimen, dan C. racemosa di pantai Joko Mursodo, serta mengetahui kadar protein pada C. racemosa dan korelasinya dengan kadar logam berat Pb.  Pengambilan sampel air, sedimen, dan C. racemosa di Pantai Joko Mursodo menggunakan metode Purpose sampling. Terdapat 3 stasiun dengan jarak antar stasiun 300 meter dan setiap stasiun terdapat 3 plot dengan ukuran 1x1m. Selain itu, dilakukan pengukuran parameter fisika-kimia perairan. Analisis kadar logam Pb menggunakan AAS, kadar protein dianalisis menggunakan metode Kjeldahl, parameter fisik-kimia dianalisis komponen utama dengan metode PCA serta analisis deskriptif berdasarkan PP RI No.22 thn 2021, kadar Pb dan protein C. racemosa diuji korelasi Pearson untuk melihat korelasinya. Hasil penelitian kadar Pb perairan yaitu 0,209±0,197±0,201 mg/L telah melebihi baku mutu PP RI No.22 thn 2021. Kadar logam Pb sedimen 0,607±0,539±0,597 mg/kg masih dibawah baku mutu CCME Thn. 2001, sedangkan kadar logam Pb C. racemosa yaitu 0,202±0,188±0,218 mg/kg rumput laut stasiun I dan III telah melebihi sedangkan stasiun II masih dibawah batas baku mutu BPOM No.5 Thn.2018. Kadar protein berkisar 5,36-6,03%. Korelasi antara kadar logam Pb dan protein menunjukkan korelasi positif yaitu semakin tinggi kadar Pb maka semakin tinggi kadar protein pada rumput laut.  Hasil PCA menunjukkan parameter pH dan salinitas perairan mempengaruhi penyerapan kadar Pb pada C. racemosa.

Heavy metal lead (Pb) pollution in marine waters can be caused by port activities. Seaweed is one of the biota that can accumulate heavy metals Pb contained in the environment. This study aims to determine the levels of heavy metals in water, sediment, and C. racemosa at Joko Mursodo beach, as well as to determine the protein content in C. racemosa and its correlation with Pb heavy metal levels.  Sampling of water, sediment, and C. racemosa at Joko Mursodo Beach using the Purpose sampling method. There are 3 stations with a distance of 300 meters between stations and each station has 3 plots with a size of 1x1m. In addition, the physico-chemical parameters of the water were measured. Analysis of Pb metal levels using AAS, protein levels analyzed using the Kjeldahl method, physico-chemical parameters analyzed by the main component with the PCA method and descriptive analysis based on PP RI No.22 of 2021, Pb levels and C. racemosa protein tested Pearson correlation to see the correlation. The results of the study water Pb levels are 0,209±0,197±0,201 mg/L has exceeded the quality standards of PP RI No.22 of 2021. Sediment Pb metal levels of 0,607±0,539±0,597 mg / kg are still below the CCME quality standards Thn. 2001, while the levels of Pb metal C. racemosa is 0,202±0,188±0,218 mg/kg seaweed stations I and III have exceeded while station II is still below the quality standards of BPOM No.5 Thn.2018. Protein levels ranged from 5.36-6.03%. The correlation between Pb metal levels and protein shows a positive correlation, namely the higher the Pb levels, the higher the protein content in seaweed. PCA results show that the pH and salinity parameters of the waters affect the absorption of Pb levels in C. racemosa.