Cd Contents In Waters Research Articles

Analysis of cadmium (Cd) heavy metal content in Mangrove Crab (Scylla olivacea) meat at Lake Siombak

The presence of heavy metals in the aquatic environment must be monitored for their presence. This study aims to determine the content of heavy metals cadmium (Cd) in water and mangrove crabs (Scylla olivacea). Water and crab samples were taken in June-July 2019. The Cd content in water has exceeded the quality standard of Kepmen LH of 2004, Cd content in crabs is still below the quality standard of BPOMRI of 2018. It can be concluded, that the content of heavy metal Cd in water has exceeded the quality standard and crabs are still below the quality standard.

Analysis of Heavy Metal Cadmium (Cd) Content on Mud Crab (<i>Scylla</i> sp.) at Wonorejo River Surabaya

The coastal waters of Wonorejo is part of the East Coast Surabaya which receive the brunt of watersheds (DAS) from other rivers. The main source of heavy metal wastes in the River on the downstream Wonorejo pass several industries suspected of disposing of hazardous waste. One of the main heavy metal which is a toxic element and effect on aquatic ecological systems are cadmium (Cd).Mud crab is one potential biota found in the mangrove area of Wonorejo River Surabaya can accumulate heavy metals. This research was carried out in April 2018 with sampling at three stations with time each week for three times.Analysis of heavy metals cadmium (Cd) in mud crabs ( Scylla sp.), water and sediments carried out in the laboratory of nutrition of the Faculty of public health University Airlangga. Research method using observation which is channeled in the waters and farmed in Wonorejo Surabaya. Mud crab meat samples, water and sediments tested using Atomic Absoption Spectrophotometry (AAS). The results of the test concentration of heavy metals cadmium (Cd) in mud crab meat on the river Wonorejo i.e. 0.032 mg.kg -1 where the value of these levels are still below the threshold of quality raw heavy metal Cd on crustaceans i.e. 1 mg.kg-1 (SNI 7387:2009). The Cd content in water of Wonorejo river in between 0.014-0.02 ppm and on sediments between 0.234-0.416 mg/kg. Correlation of cadmium content in water with crab meat in the correlation coefficient shows of Wonorejo -0.22 (a weak correlation, a negative direction). Then, the correlation of the content of cadmium in sediments with crab meat in the correlation coefficient shows of Wonorejo 0.285 (of correlation is weak, the positive direction).

Yang’s Clearing-up Feature in Marine Bay

Using investigation on Cadmium (Cd) in surface and bottom waters in this bay during 1984-1988 (in absence of 1987), this paper analyzed the horizontal distributions of Cd, calculated the absolute and relative settlement and accumulation of Cd. Results showed that the settlement of Cd was rapid, resulting in the consistency of Cd contents in surface and bottom waters. In case of little source input, Cd contents in waters were very homogeneous with a small differenct of 0.01 µg L−1. The absolute and relative settlement amounts of Cd were 0.14-6.47 µg L−1 and 70.0-99.8%, respectively. The absolute and relative acumulation amounts of Cd were 0.10-1.29 µg L−1 and 55.5-100.0%, respectively. The settlement/accumulation of Cd in bottom waters were high/low in case of Cd contents in surface waters were high/low. Furthermore, in order to demonstrate the migration processes of substances in marine bay, we provided Yang’s Clearing-up Feature, as well as the mathematical expression.

Influence of Cd contents on the vertical migration process in marine bay

This paper analyzed the contents and distributions of Cadmium (Cd) in Jiaozhou Bay 1989. Results showed that Cd contents in bottom waters in Jiaozhou Bay in April and July 1989 were 0.05-0.06 μg L-1 and 0.06 μg L-1, respectively. The water quality of Cd was meeting Grade I, and the pollution level of Cd was very slight in 1989. The vertical water’s effect was very weak in case of Cd contents in waters were very low, resulting in the vertical migration strength of Cd was very weak, and Cd contents in waters were changing along with the moving of marine current. The vertical water’s effect was strong in case of Cd contents in waters were relative high, resulting in the vertical migration strength of Cd was very strong, and big part of Cd in waters were transporting to sea bottom.

The homogeneity changing process of Cu in Jiaozhou bay waters

Using investigation data on Cu in April, July and October 1985, this paper researched the horizontal distributions of Cd in Jiaozhou Bay. Results showed that there were two major Cd sources, i.e., river flow and marine current, and the waters in Jiaozhou Bay could be divided into two classes. On one hand, in case of there was Cu input, Cu contents in waters was non-homogeneous. On the other hand, in case of there was little input, Cd contents in waters was homogeneous. Along with time, Cu contents in waters were undergoing process from non-homogeneous to homogeneous. This revealed that ocean has feature of homogeneous by means of tide and current. Ocean makes all of the substances in waters to be homogeneous, and make all of the substances in waters to diffuse in tends of homogeneous.

Elements Content in Otolith as Pollution Indicator for Cultured Sea Bass (Lates calcarifer) of Malaysia

Otoliths of cultured sea bass and ambient waters were sampled from 24 fish cages and ponds in Malaysia to investigate the contents of Sr, Mg, Ba, Cd and Zn. The following elements content in otolith and water were analysed with Inductively Coupled Plasma Mass Spectrometer (ICP-MS) and/or Atomic Absorption Spectrometer (AAS) to determine the anthropogenic impacts based on the grouping characterisation of the sampling locations. Three groups i.e. A, B and C were characterised according to the least, intermediate and high anthropogenic impact to otolith elemental content. The Enrichment Factor (EF) and Metal Pollution Index (MPI) were calculated to determine the pollution source and level. The content of Ba in otolith was found positively related with the salinity variation and Ba content in water. Elevated content of Zn in otolith and water was found in group A suggesting that oil leaking from tourist boating activities effects exceed the urbanisation and industrialisation impact. EFznsupport the enrichment of Zn in waters which exceed the recommended level. MPI showed that group A > C > B and support that tourism activities affect the pollution level and indicate otolith functioned as pollution indicator. Highest EFcdsuggested Cd incorporation onto otolith despite of the low content of Cd in water. The sequence of the elements content in otolith and water are Sr > Mg > Zn > Ba > Cd and Sr > Mg > Ba > Zn > Cd respectively.

Cadmium content in thothok shellfish (Geloina erosa) from mangrove area of Segara Anakan, Cilacap, Central Java

Abstract. Hidayati I, Wiryanto, Setyawan AD. 2011. Cadmium content in thothok shellfish (Geloina erosa) from mangrove area of Segara Anakan Cilacap, Central Java. Bonorowo Wetlands 1: 51-57. The aim of this study was to determine the Cd metal content in meat of thothok shellfish (Geloina erosa), water, and sediments in the mangrove area of Segara Anakan, Cilacap, Central Java i.e., Muara Dua, Motean, and Lomanis. The study was conducted in June-November 2005 with two replication samples. Seawater and sediment samples were taken at a depth of 3 meters from the water surface, while shellfish were taken at random. Cd level was analyzed using AAS (Atomic Absorption Spectrophotometer). Other parameters measured are environmental parameters (i.e. temperature and pH). The results showed that the average measurement in three stations was: Cd content in shellfish meat 0.05 mg/kg (ppm), seawater 0.04 mg/kg, and sediment 0.12 mg/kg, temperature 30.8 C, and pH value 7.66. The highest levels of Cd are found in sediments. ANOVA statistical analysis showed that the metal content of Cd in the three stations tends to be uniform. Cd content in shellfish and temperature showed a direct correlation of +0.193. Cd content in water and sediment with temperature had a reverse correlation of -0.038 and -0.174. Cd content in shellfish and water with pH showed an inverse correlation of -0.070 and -0.125. Cd content in sediment with pH had a significant direct correlation of +0,699.