Abstract
Background:Heavy metals are materials naturallyoccurringin natureand increase with a rise inhuman activity. Ex-mining areas anddomestic waste fromhuman settlementsaresourcesof heavy metal contamination that enter and pollute water,whichthenaccumulatesinvariousorganisms including the Caulerparacemosacommunity. The accumulation of heavy metals in C. racemosahasa wide impact on the food chainin aquatic ecosystems andhumans because this alga is a consumptive commodity. Methods:Sampling of C.racemosawas carried out atseven sites on Bintan Island, Indonesia covering the eastern (TelukBakau,BeralasPasir, MalangRapat), northern (Berakit andPengudang), western (Sakera), and southern parts(Tg.Siambang). Sampling was carried outduringdifferentmonsoons,andheavy metals in water and sediment samples were measured todeterminethe heavy metalconcentration.Heavy metalswereanalyzed by a spectrophotometric method using Atomic AbsorptionSpectrophotometry. Results:The results showed that heavy metal concentrations fluctuate according to changes in the wind season,which carry currents and spread pollutants into the water. The concentration of metal in the water is also from anthropogenic activities. The heavy metal content of cadmium(Cd), lead(Pb), copper(Cu), iron(Fe), and zinc(Zn)in C. racemosais high in locations close to settlements. Meanwhile, in seawater samples, Fe and Zn metals have the highest concentrations compared to others. Conclusions:Ex-bauxite minesarea source of Fe and Zn metal contamination in the environment, especially at Tg.Siambang. The levels of these heavy metals in the sediment are also high, as surface particle deposits accumulate at the bottom of the sediment. In general, the levels of heavy metals Cd, Pb, Cu, Fe, and Zn increase in the northern monsoon because the dynamics of the water transport greater heavy metal pollution.
Highlights
Heavy metals are materials naturally contained in nature
Heavy metals in Caulerpa racemosa samples Heavy metal analysis was distinguished by season to determine the content in C. racemosa and to explain the effect of the season on the water
Research by Llanos and Dalawampu (2017) on a C. racemosa sample stated that the concentration of heavy metals such as Cd, Pb, and Zn was in the range of 0.21–0.29 μg/g, 2.61–7.23 μg/g and 6.03–7.23 μg/g, respectively.[32]
Summary
Heavy metals are materials naturally contained in nature. These metals increase along with a rise in human activity and become a threat to environmental pollution. Heavy metals are materials naturally occurring in nature and increase with a rise in human activity. Ex-mining areas and domestic waste from human settlements are sources of heavy metal contamination that enter and pollute water, which accumulates in various organisms including the Caulerpa racemosa community. The accumulation of heavy metals in C. racemosa has a wide impact on the food chain in aquatic ecosystems and humans because this alga is a consumptive commodity. Results: The results showed that heavy metal concentrations fluctuate according to changes in the wind season, which carry currents and spread pollutants into the water. In article can be found at the end of the article
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