REDUKSI ION KALSIUM DALAM AIR TANAH MENGGUNAKAN ADSORBEN DARI KULIT PISANG KEPOK (Musa normalis L.)

ABSTRACT It had been done a research with the aim to investigate the reduction of calcium ion in the soil water using adsorbents from Kepok banana (Musa Normalis L.) peel. This research used activated adsorbents with H2SO4 3 M and unactivated, with the various time of mixed until 10, 20, 30, 40, 50 and 60 minutes. The results showed that the reduction % of calcium ion of unactivated adsorbents were 2.65; 3.03; 3.79; 4.17; 4.54; 6.44; and activated were 15.15; 16.67; 19.32; 21.59; 22.73 and 23.48 respectively. Keywords: Reduction of calcium ion, soil water, Kepok banana peel

ANALISIS KUALITATIF KANDUNGAN FORMALIN PADA TAHU YANG DIJUAL DIBEBERAPA PASAR DI KOTA PALU

It had been an investigation on qualitative analysis of formalin in tofu that sold in Palu markets, purpose of this study was to identifity content of formalin in samples of tofu.This identification can know with changes of the colour of the filtrate in  samples of tofu  from  pink to be brown until the colour fed off in 30 minutes.  Samples of tofu were taken from some traditional and modern markets in Palu city. The results obtained 66.7% of all of tofu samples identified content of formalin there were 6 samples with sign of M-3, T-2, T-6, T-5, M-2, and T-4, but 3 samples with sign of T-3, M-1 and T-1 not found. It was supported of texture of tofu samples. There showed that producen of tofu in Palu city is still using formalin as preservative substance in process of tofu production.Keywords: Qualitative analysis of formalin, tofu

SINTESIS DAN KARAKTERISASI EDIBLE CUP DARI ALGA MERAH (GRACILARIA VERRUCOSA)

Edible cup merupakan salah satu inovasi sebagai alternatif wadah yang dapat dimakan dan  ramah lingkungan. Salah satu solusi untuk mengurangi penggunaan kemasan plastik atau peralatan makan plastik yaitu beralih ke produk yang bersifat ramah lingkungan. Edible cup dapat dibuat dari alga merah (Gracilaria verrucosa) dan konjak yang disuspensikan dengan pemlastis berupa gliserol. Tujuan dari penelitian ini adalah untuk mengetahui karakteristik edible cup dari ekstrak alga merah (Gracilaria verrucosa) yang dihasilkan. Metode yang digunakan dalam ekstraksi alga merah adalah ekstraksi semi murni. Penelitian ini menggunakan variasi konsentrasi gliserol 0,5%; 1%; 2,5%; 5% dan 7,5%. Karakteristik edible cup terbaik terdapat pada perlakuan konsentrasi gliserol 0,5% karena memiliki kadar air dan daya larut rendah sehingga cup yang dihasilkan tidak mudah mengalami perubahan secara dimensional, dan memiliki ketebalan yang baik, sehingga efektif digunakan sebagai penopang bahan makanan atau minuman

Kajian Teknologi Produksi Biogas Dari Sampah Basah Rumah Tangga

The investigation about study the biogas production Technology from household waste has been done. This research aims to determine the starter concentration, water and household waste ratio to produc highest biogas, and also to find the fermentation time produce biogas with hight rendement. It was reache by applying 5 levels of cow dung starter concentration and 5 levels of water and household waste ratio i.e 0%, 6,25%, 12,5%, 18,75% and 25% and 1:2, 1:2,5, 1:3, 1:3,5 and 1:4 (b/v) respectively. The fermentation time was 3 days. The result showed that the higher cow dung concentration the lower biogas production. The highis biogas production (971,4 mg/L) was found with 6,25% of the starter. The increasing water and household waste ratio would decreased biogas production, and the using of 1:3,5 and 1:4 didn’t produce any biogas. The highest biogas production was found with 1:2 of water/household ratio i.e (631.29 mg/L). the fermentation time which produce the highest biogas rendement was found with 1 day of fermentation tim

KAJIAN KEMAMPUAN AKAR TANAMAN KANGKUNG DARAT (Ipomoea reptans Poir) DALAM MENYERAP LOGAM MERKURI PADA TANAH TERCEMAR

The Research has done on assessment ability plants of kale land root’s (Ipomoea reptans Poir) in absorbing metallic of mercury (Hg) on polluted soil. Methods of assessment done by complete randomized design (CRD) to determine the influence of plant age and concentration of the planting medium to large concentrations absorbed of mercury in plant roots. Age of planting consists of 4 harvest time, it is 2, 3, 4, and 5 weeks. The concentration of the cultivation medium is 25 ppm, 50 ppm, 75 ppm dan 100 ppm. The results of analysis variance test for the effect of cultivation age indicate the real difference (F calculation > F 5 %), where the test results of BNT 0,05 obtained in the third week is the maximum age of planting. The influence of concentration on analysis variance test and LSD analysis indicate the real difference, where F calculation > F 1%.Keywords: Absorption, Metal Mercury, Land Plants kale, Age of planting, growing media concentration

TRANSLOKASI MERKURI (HG) PADA DAUN TANAMAN BAYAM DURI (AMARANTHUS SPINOSUS L) DARI TANAH TERCEMAR

Research about mercury translocation (Hg) into the leaf of Amaranthus Spinosus L from polluted soil has been carried out. The research aim was to know influences of  remediation time on the abilty of  mercury absorptions , knowing the concentration of mercury distribution in the leaf of A. spinosus L and abilty of A. spinosus L as hyperacumulator plant to the mercury. Remediation times used 14 days, 21 days and  42 days. The consentration of Mercury on the growth medium were 25 ppm, 50 ppm, 75 ppm, and 100 ppm. The result showed  that the time of maximum absorptions were at remediation times of  14 days by mercury acumulation of 70.6901 mg/kg DM (Dry Measure). This value indicated that A. spinosus L. is hyperacumulator to the mercury and it have a potential as phytoremediator on the area that contaminated by mercury

Formalin Analysis of Food Ingredients in Palu

Research on formalin analysis of food ingredients in Palu has been conducted. The purpose of the research is to find out formalin content in some food. The analyzed samples were foods that marketed in Palu, such as salt fish, noodles, mujair fish, and tofu obtained from several places in Palu. The qualitative analysis of formalin done before measured of formalin quantitatively. The data on formalin found by UV-Vis spectrophotometer with the wavelength of 385 nm. Formalin content of salted fish, noodles, Mujair fish, and tofu were 2,005 ± 0,187ppm, 2,183 ±0,231ppm, 1,931 ±0,174 ppm, and 1,957 ±0,254 ppm, respectively

Analisis Kandungan Timbal Pada Buah Apel (Pyrus Malus.L)Yang Dipajangkan Dipinggir Jalankota Palu Menggunakan Metode Spektrofotometriserapan Atom

Telah dilakukan penelitian tentang analisis kandungan timbal pada buah apel (Pyrus Malus L.)yang dipajangkan pada jl.Sisingamangaraja dan jl.Undata kota Palu menggunakan metode spektrofotometri serapan atom. Penelitian ini bertujuan untuk mengetahui kandungan logam timbal pada buah apel. Penelitian ini dilakukan dalam dua tahap masing-masing tahap destruksi sampel dan tahap penentuan kadar logam timbal dalam sampel. Konsentrasi timbal ditentukan menggunakan metode spektrofotometri serapan atom, hasil yang diperoleh menunjukkan kandungan timbal yang paling tinggi terdapat dijalan Sisingamangaraja dengan waktu pemaparan 12 hari, kandungan timbal yang diperoleh pada buah apel dengan kulit sebesar 0,178 ppm. Sedangkan dijalan undata untuk waktu pemaparan 12 hari, kandungan timbal yang diperoleh pada buah apel dengan kulit 0,174 pp

FITOAKUMULASI MERKURI OLEH AKAR TANAMAN BAYAM DURI (AMARANTUS SPINOSUS LINN) PADA TANAH TERCEMAR

The studies entitled Fitoakumulasi Mercury By Root Crops Spinach Thorns ( Amarantus spinosus Linn ) In Contaminated Soil has been done with the purpose of remediation time know effect on the ability of plant roots to absorb mercury thorn spinach and determine the maximum concentration of mercury that accumulates in the roots of spinach plants thorns in the remediation time . The method used in this study is defined as phytoremediation technology recovery , cleanup , removal or reduction of contaminants in soil or water by using the help of plants . Time remediation consists of 4 stages 7 , 14 , 21 and 42 days . While planting media concentration is 25 ppm , 50 ppm , 75 ppm and 100 ppm . The maximum concentration of adsorbed on the roots of spinach plants thorns is 0 , the dry weight of roots harvested at a institusen empire with a concentration of 100 ppm , the remediation time is day 14 ( P2 ) . And the ability of the roots to absorb mercury remediation significantly different with respect to time