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Articles by M. Shuhaimi-Othman
Total Records ( 11 ) for M. Shuhaimi-Othman
  M. Shuhaimi-Othman , A.K. Ahmad and E.C. Lim
  A study was conducted in Bebar River, Pahang, a peat swamp river in 2005 to determine metals concentration in the water and sediment and some physical-chemical parameters. Eleven sampling stations were selected along the river. Water quality parameters were recorded at each station using a Hydrolab® Surveyor 4a system. Water and sediment samples were brought back to laboratory for metals analysis. Results show that the physical-chemical parameters of water in Bebar River were in normal range/class I (good) according to Malaysian Interim Water Quality Standard (INWQS) except for pH (class III - moderate) and dissolved oxygen in the water (class IV-V - bad). However, low values of these parameters are normal for peat water (blackwater). Metals concentration (dissolved metal) in the water (Cu, Cd, Pb, Cr and Ni) was in the range of natural concentrations. Zinc, Fe and Mn concentration were higher than recommended concentrations at some stations. Cadmium, Pb, Zn and Ni concentrations in sediment were low and in the range of natural concentrations while Cu and Cr was high at some stations. Correlation analysis show that only Cu and Cr have significant positive correlation (p<0.05) between metal concentration in the sediment and water. The importance of this sensitive ecosystem is discussed further in this study.
  A.K. Ahmad and M. Shuhaimi-Othman
  A study was conducted to determine water quality and cadmium, copper, lead and zinc concentrations in sediments and 15 fish species from Lake Chini, Pahang. Physical parameters measured were water temperature, dissolved oxygen concentration, pH and conductivity. Sequential sediment extraction was conducted to extract metals from sediment, which involves three different of non-residual fractions. Fish tissues were extracted using wet digestion method. Metals concentration in sediment and fish were measured using atomic absorption spectrophotometer AAS 4100 Perkin Elmer. According to Malaysian National Interim Water Quality Standards (INWQS), Lake Chini was classified between moderate to good quality. Lake Chini was found to have low metal concentrations in sediments and fish, which indicates no significant anthropogenic metals input to the lake. One-way ANOVA test indicated that all metal concentrations were significantly different (p<0.05) between fish species, but not between feeding behavior. Heavy metal concentrations in fish tissues were found lower than the maximum allowable limit suggested by the Malaysian Food Act, which ascertain that the fish is safe to be eaten.
  Abdulali K.A. Taweel , M. Shuhaimi-Othman and A.K. Ahmad
  Concentrations of cadmium (Cd), zinc (Zn), lead (Pb), nickel (Ni) and cobalt (Co) were measured in various organs (such as in liver, gill and muscle) of Tilapia fish (Oreochromis niloticus) which were collected from Serdang night market, Bangi night and wet markets and Kajang wet market, in Selangor, Peninsular Malaysia. The concentration of metals was measured by inductively-coupled plasma mass spectrometry (ICP-MS). The levels of metal varied as it depended on various tissues. Zinc was the dominant metal measured during this study. In general, results indicated that all studied heavy metals concentrations were significantly higher (p<0.05, two way ANOVA) in liver samples collected from all sites than gill and muscle, except for the zinc in fish liver from Serdang night market (41.87 μg g-1 dry weight (DW)) less than zinc in fish gill in the same market (55.72 μg g-1 DW). The highest Cd, Pb and Co concentration in fish liver were observed in Kajang wet market which is 0.44, 0.72 and 02.86 μg g-1 DW, respectively. Meanwhile, in fish gill, levels of Pb and Co in Serdang night market were the lowest among all sites which is 0.34 and 0.31 μg g-1 DW, while the highest in gill from Bangi wet market which is 0.63 and 0.41 μg g-1 DW, respectively. Cd, Zn, Pb and Co levels in fish muscle from Serdang night market were the lowest (0.02, 11.36, 0.10 and 0.25 μg g-1 DW, respectively), whereas the lowest Ni level was noted in fish muscle from Kajang wet market (03.84 μg g-1 DW). On the other hand, the highest Cd and Zn level were in Bangi wet market (0.03 and 16.72 μg g-1 dw, respectively). The results obtained in this study were compared with those reported in all other areas of earlier studies. All studied heavy metals levels are below the limits for fish proposed by World Health Organization and safe within the limits for human consumption in the edible part of studied fish.
  Mustafa Rahouma , M. Shuhaimi-Othman and Zaidi Che Cob
  Environmental pollution has become a source of concern and inconvenience to the world, the study was conducted to evaluate some selected heavy metals on Acetes shrimp. The present research project was undertaken to determine heavy metal (Zn, Cd, Pb and Mn) in the tissue of shrimp (Acetes indicus) in two different sites (Malacca and Kedah) on the west coast of Peninsular Malaysia. Samples were collected in this study during the months August, September, October and November and determine the concentrations of heavy metals zinc, lead, cadmium and manganese by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The results show that in general, the highest heavy metals concentrations were detected in samples taken from Malacca than Kedah. The heavy metal concentration in this shrimp varied significantly depending upon the months and sample station from where the shrimp was collected. In Malacca, the highest concentration level of Zn was detected in the Acetes shrimp (45.79±2.54 μg g-1 dry weight) in October 2010 followed by that of Kedah reported in September (45.08±2.93 μg g-1). The highest concentration level of Cd was detected in Acetes at Malacca 0.83±0.64 μg g-1 in September, whereas it was 0.21±0.04 μg g-1 in November at Kedah while the highest concentration level of Pb was recorded in Malacca which was 1.29±0.85 μg g-1 in September while it was 0.55±0.12 μg g-1 in October at Kedah. The highest concentration level of Mn was detected in A. indicus in Malacca recorded 6.95±1.19 μg g-1 in August while it was 6.10±1.01 μg g-1 in November at Kedah. However, the concentrations of heavy metals in Acetes indicus collected from Malacca and Kedah were within the permissible levels and are safe for the human consumption and public health.
  Abdulali Taweel , M. Shuhaimi-Othman and A. K. Ahmad
  Fingerlings tilapia fish (Oreochromis niloticus) were exposed in laboratory conditions to a range of Copper (Cu), Cadmium (Cd), Lead (Pb) and Zinc (Zn) concentrations separately and the mortality rate were registered after 24, 48, 72 and 96 h. Median Lethal Concentrations (LC50s) and Median Lethal Times (LT50s) values were calculated by static bioassays for 24, 48, 72 and 96 h with the 95% fiducial limits through Probit analysis. LC50 and LT50 increased with the decrease in mean exposure times and concentrations, respectively. The LC50s for 96 h for Cu, Cd, Zn and Pb were 1093, 3751, 16177 and 1494 μg L-1, respectively and the LT50s for maximum concentration used for Cu, Cd, Zn and Pb were 20.25, 11.48, 20.70 and 24.66 h, respectively. Metals bioconcentration in tilapia fish increases with exposure to increasing concentrations and Cu was the most toxic to tilapia fish, The toxicity ranking of the four heavy metals was Cu>Pb>Cd>Zn. Comparison of LC50 values for studied heavy metals for this species with those for other fishes reveals that tilapia fish (Oreochromis niloticus) is equally or less sensitive to heavy metals than most other tested fishes.
  A.O. Alabi , M.E. Toriman , Mushrifah Idris , M. Shuhaimi-Othman , Nor Rohaizah Jamil , S.A. Sharifah Mastura , Mohd Talib Latif , Muhammad Shafiq Ruslan , Nur Amelia Abas , Nor Azlina Abdul Aziz and Lee Qiao Yun
  Predictive modeling of water quality is increasingly becoming a crucial aspect of water resources management as water quality models not only provide an explanation for the transport and transformations of key water quality components but also provide a platform for useful scenario evaluation and testing. Likewise, the use of Geographical Information System (GIS) to support or aid predictive modeling further underlines the versatility and usefulness of GIS as a tool. In this study, a water quality model has been established to simulate parametric concentrations in a natural lake system. The utilization of GIS in the modeling process is described and the benefits highlighted. Among other practical applications, GIS significantly aided model input generation and output display. Output spatial visualization facilitated by GIS, enabled a clearer presentation of spatial variation and progression of water quality components within the lake. This is significant for water resources management purposes as it makes analysis on a spatial and temporal scale easier and also enhances the geographical linkage between pollution sources and areas of impact.
  Khaled S.A. Said , M. Shuhaimi-Othman and A.K. Ahmad
  A study of water quality parameters (temperature, conductivity, total dissolved solid, dissolved oxygen, pH and water hardness) in Ampang Hilir Lake was conducted in January, April, July and October 2010. The water quality parameters were tested and recorded at different sampling stations chosen randomly using Hydrolab Data Sonde 4® and Surveyor 4® a water quality multi probe (USA). Six metals which were cadmium, chromium, lead, nickel, zinc and copper were determined in five different compartments of the lake namely water, total suspended solids, plankton, sediment and fish. The metals concentration were determined by Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Perkin Elmer Elan, model 9000.The water quality parameters were compared with National Water Quality Standard (NWQS Malaysia) while metal concentrations were compared with Malaysian and international standards. The study shows that water quality parameters are of class 2. This condition is suitable for recreational activities where body contact is allowed and suitable for sensitive fishing activities. Furthermore, metal concentrations were found to be lower than the international standards, therefore toxic effects for these metals would be rarely observed and the adverse effects to aquatic organisms would not frequently occur.
  Khaled S.A. Said , M. Shuhaimi-Othman and A.K. Ahmad
  A study of water quality parameters (temperature, conductivity, total dissolved solid, dissolved oxygen, pH and water hardness) in Titiwangsa Lake was conducted in January, April, July and October 2010. The water quality parameters were tested and recorded at different sampling stations chosen randomly using hydrolab data sonde 4® and surveyor 4® a water quality multi probe (USA). Six metals i.e., cadmium, chromium, lead, nickel, zinc and copper were determined in five different compartments of the lake namely water, total suspended solids, plankton, sediment and fish. The metals concentration were determined by Inductively Coupled Plasma Mass Spectrometer (ICP-MS), perkin elmer elan, model 9000. The water quality parameters were compared with National Water Quality Standard (NWQS Malaysia) while metal concentrations were compared with Malaysian and international standards. The study shows that water quality parameters are of class 2. This condition is suitable for recreational activities where body contact is allowed and suitable for sensitive fishing activities. Furthermore, metal concentrations were found to be lower than the international standards, therefore toxic effects for these metals would be rarely observed and the adverse effects to aquatic organisms would not frequently occur.
  Salwa A. Abduljaleel and M. Shuhaimi-Othman
  The influence of dietary cadmium on the accumulation and effects of dietary lead, examined in chicken. This experiment was conducted to investigate the toxic effects of dietary Cd and Pb on chick’s body weight and organ, content of the tissues of these two metals was also detected. One day age chicks of Gallus gallus domesticus fed diet supplemented with 25, 50, 100 ppm of Cd, second group exposure to 300, 500, 1000 ppm of Pb in feed daily during 4 weeks. The control groups were fed without supplementation of metals. The concentrations of Cd and Pb resulted in increased of Cd and Pb content in liver, gizzard and muscle. While Cd 100 ppm and Pb 1000 ppm were increased metals content in feather. Body weight of chicks was not influenced by Cd treatment. In contrary Pb treatment was significantly (p<0.05) decreased body weight of chicks after dietary treatment. On the other hand, Liver weigh in chicks was significantly (p<0.05) decreased after Cd and Pb treatments.
  M. Shuhaimi-Othman , Y. Nadzifah , N.S. Umirah and A.K. Ahmad
  Impact of metals to the environment is increasing problem worldwide. This study was conducted to determine the acute toxicity of 8 metals to worms Nais elinguis in laboratory. Adult freshwater worms N. elinguis (Oligochaeta, Naididae) were exposed for a four-day period in laboratory conditions to a range of copper (Cu), cadmium (Cd), zinc (Zn), lead (Pb), nickel (Ni), iron (Fe), aluminum (Al) and manganese (Mn) concentrations. Mortality was assessed and median lethal times (LT50) and concentrations (LC50) were calculated. LT50 and LC50 increased with the decrease in mean exposure concentrations and times, respectively for all metals. Ninety-six hour LC50 for Cu, Cd, Zn, Pb, Ni, Fe, Al and Mn were 7, 27, 912, 580, 645, 123, 3874 and 364 μg L-1, respectively. Cu was the most toxic to N. elinguis followed by Cd, Fe, Mn, Pb, Ni, Zn and Al (Cu>Cd>Fe>Mn>Pb>Ni>Zn>Al). Comparison of LC50 values for metals for this species with those for other freshwater worms reveals that N. elinguis is equally or more sensitive to metals. This study indicates that N. elinguis is a potential organism in toxicity testing and as a bioindicator of metals pollution.
  Dewi Hidayati , Norela Sulaiman , B.S. Ismail and M. Shuhaimi-Othman
  Investigation of the effect of flowing mud volcano lava to the aquatic life in the river using study case of LUSI mud in Indonesia had been conducted by in-situ biomonitoring including measurement of biological response of caged fish and river body quality. Fishes were caged in the downstream sections of the mud effluent and control cage was placed at the upstream section. Similar hierarchy of metal found in the effluent, water and sediment i.e., Al>Fe> Pb>Mn>Cu>Zn>Cr>Cd. Concentrations of Total Suspended Solid (TSS), total aluminum, total iron and lead at the downstream effluent site which showed maximum values of ([TSS = 4177] [Al = 23.70] [Fe = 6.97] [Pb = 1.27] mg L-1) were significantly higher than that of the upstream control ([TSS = 381] [Al = 4.30] [Fe = 1.38] [Pb = 0.38] mg L-1). Excluding lead in the downstream sites (153 mg kg-1), all sediment levels were found to be below the possible effect level. Metal levels in fish bodies from the downstream sites showed higher level than control, with maximum level observed in aluminum species, 377.9 mg kg-1. Fishes which were exposed in the downstream sampling sites showed low survival rate value of 10-0% with survival period of = 21 days, gill alteration in a level of irreparable lesion with Histopathologic Alteration Index (HAI) value of 121-233 while the fishes in the control cage had a survival rate of 93-66% for 28 days and normal state of gills with HAI value of 0.0-0.3. Mainly by increasing colloidal aluminum LUSI mud volcano lava into the river results in adverse effect on the downstream water quality and fish life.
 
 
 
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