Awareness of haze pollution and management increased in Southeast Asia since 1990. However, the
focus on environmental management is decreasing especially in Malaysia due to the abundant
resources and increased development pressure. The total health damage cost because of haze in the
country became significantly high due to the long duration of haze events year by year. This paper
discusses the health damage caused by bronchitis due to the haze events in Malaysia. The analysis
shows positive coefficient of independent variables which indicates the positive relationship between
dependent variable and independent variables. Multiple linear regression analysis shows that 45.3%
variation in damage cost of bronchitis could be explained by FAI, GDPPC, and CO2.
Nanofiltration membranes technology commonly used for wastewater treatment especially
wastewater containing charged and/or uncharged species. Commonly, textile wastewater
possesses high chemical oxygen demand (COD) and non-biodegradable compounds such as
pigments and dyes which lead to environmental hazard and serious health problem. Therefore, the
objective of this study was to investigate the effects of hydrophilic surfactant on the preparation and
performance of Active Nanofiltration (ANF) membrane. The polymeric ANF membranes were
prepared via dry/wet phase inversion technique by immersion precipitation process. The
Cetyletrimethylammonium bromide (CTAB) as cationic surfactant was added in casting solution at
concentrations from 0 to 2.5 wt%. The synthesized membrane performance was evaluated in terms
of pure water permeation (PWP) and dye rejection. The experimental data showed that the
membrane demonstrated good increment of PWP ranging from 0.27 to 10.28 L/m2
h at applied
pressure from 100 to 500kPa, respectively. Meanwhile, the ANF membranes achieved high
removal of Methyl Blue and Reactive Black 5 dye up to 99.5% and 91.6%, respectively.
The hydrology hydraulic model is established to assess environmental information on hydrology which
can be used to investigate causes of various environmental problems at the river and natural lake
catchment. This study reports on sediment concentrations at a river using a gravimetric method to
investigate the hydrology system at a lake catchment. The measurement was carried out at the
upstream, midstream, and downstream stations on the river in normal, rainy and post-rainy seasons.
The stations are located along the Chini River, which are connected to a catchment lake (located at
latitude 3°26’36.41”E-3°27’03.26”E and longitude 102°54’31.94”N-102°53’35.49”N). From the
measurements, it is estimated that on average 787.621 tonne/km2 of sediment is transferred into the
natural lake via Chini River annually. The correlation of statistical analysis between the sediment load
and discharge study was very significant (R2 = 0.980). There is a linear relation between the area of
the catchment and sediment load of the connecting river as supported by other studies in Malaysia.
The outcome of the study suggests that the high sedimentation is due to land use activity, existence of
the dam at the downstream of Chini River that traps the sediment, reverse flow from the Pahang River
into Chini River and riverbank erosion factors. From this study, the sediment control steps are
suggested such as creating conservation partially at the lake catchment, modifying the dam system,
riverbank erosion control, and application of “Monkey Cheek” system. These sediment control steps
may help to clean up the high suspended sediment at the whole lake system area, hence solving and
mitigating the environmental problems in the natural lake catchment.