Browsing by Author "Amran, Ali"

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    Sintesis Silika Gel Yang Berisi Garam Ni Secara Sol Gel Dan Uji Higroskopisnya
    (2016-04-23) Sophia, Halida; Amran, Ali
    The synthesis of silica gel using tetraethoxysilane has been researched with reactions of hydrolysis and polycondensation. The amount of water used as reactant will determine the degree of hydrolysis and condensation. For it will influence the abilty of higroskopic of silica gel. Synthesis of silica gel was conducted by reaction of tetraethoxysilane, ethanol, and variation on water volume from the salt hydrate Ni(NO3). 6 H2O. After transparent solid gel was dried at 40 o C xerogel was obtained.. Analysis that conducted for silica gel consist of gelation time,% loss of weight and higroscopic test. The result shown gelation time for gel silica that have contains Ni salt less than silica gel with H2O, % loss of weight for silica gel with Ni salt less than silica gel that have contains H2O, and silica gel with Ni salt have more higroscopic than silica gel that consist of H2O
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    Study Comparison Time Series Water Quality In The Upstream, Middle, And Downstream Of Batang Kuranji River
    (wahyu sari yeni, 2018-09-19) Prabowo, Heri; Amran, Ali
    This study aims to determine the water quality and carrying capacity of pollution load Batang Kuranji River in the upstream, middle, and downstream. This researchis descriptive quantitative parameters of temperature, pH, BOD, COD, NO2, NO3, TSS, E-coli and DO. Determination of these parameters because the source of activities that potentially degrade the quality of river water is an activity that produces domestic waste and household industries that produce organic waste water. Since rivers in Padang City have not been classified, the test results compared with class II river water quality analysis refers to PP No.82/2001. Temperatures in the Batang Kuranji River have a tendency to rise from upstream to downstream. In 2013-2017 the temperature passes the quality standard at all observation points (30o - 33oC). The BOD content in all observation stations has passed the quality standard (3.2 mg/l - 23.6 mg/l), with peak in 2012 (23.6 mg/l), COD concentrations upstream and midstream between 2014 -2016 according to the quality standard, but by 2017 the COD concentration has increased in all locations exceeding the quality standard. Upstream and downstream TSS concentrations meet the quality standard, while the downstream TSS passes the quality standard (> 50 mg/l). The DO concentration at observation station 1 - 6 shows good quality in 2011 - 2015. But it exceeds the quality standard in 2016 and 2017. This research can be used to improve the quality of Batang Kuranji River.