Physicochemical Parameters of Surface Seawater in Malaysia Exclusive Economic Zones Off the Coast of Sarawak

Abstract

Physicochemical characteristics of seawater play crucial role for productive marine ecosystem and fisheries activities. The limited information of Sarawak surface seawaters provide objective to determine the physicochemical characteristics in Malaysia Exclusive Economic Zone off the Coast of Sarawak. A total of 38 samples were collected using Van Dorn Waals Sampler and the physicochemical characteristics were measured using physicochemical parameter probes. Ranges for dissolved oxygen (DO) was 3.73-6.83 mg/l, temperature was 27.03-30.13ºC, pH was 7.63-7.82, salinity was 33.77-36.77 ppt, turbidity was 0.01-1.01 NTU, chlorophylla concentration was 0.01-4.52 mg/l, nitrate was 0.01-0.08 mg/l, nitrite was 0.001-0.012 mg/l and phosphate was 0.01-5.95 mg/l. There was positive correlation between chlorophyll-a and nutrients that indicated the biological uptake by biota (e.g. phytoplankton). In conclusion, the present study shows that the Malaysia Exclusive Economic Zone off the Coast of Sarawak had minimal pollution based on Malaysia Marine Water Quality Criteria. An update for physicochemical characteristics of surface seawaters in the coverage areas is required as future work.

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Buoy Observasi Data Parameter Oseanografi Dan Meteorologi di Perairan Terumbu Karang : Desain dan Implementasi

“…Kerusakan ekosistem terumbu karang menyebabkan hilangnya habitat hewan dan disebabkan oleh faktor fisik dan kimia oseanografi. Peningkatan suhu permukaan air laut dan tingkat kekeruhan air laut memengaruhi pertumbuhan terumbu karang [1]. Penelitian pada [2] menunjukkan adanya dampak peningkatan suhu di perairan Gili Matra pada Mei 2016.…”

Behaviour of heavy metals and natural radionuclides in the mixing of phosphogypsum leachates with seawater

“…The physicochemical parameters of the starting samples are shown in Table 1. The SW sample showed typical values of marine waters, with an alkaline pH (≈ 7.8), an electrical conductivity (EC) of 61.5 mS cm -1 , due to its high salinity, and a redox potential (Eh) of 465 mV, similar to the observed values for seawaters from Huelva coast and other places worldwide (Papaslioti et al, 2018;Abdel-Halim and Aly-Eldeen.,2016;Akmal Idrus et al, 2017) 1. Values of the physicochemical parameters of the starting samples.…”