Purun Tikus Research Articles

Pengaruh Pemberian Kompos Eceng Gondok Dan Purun Tikus Terhadap Pertumbuhan Dan Produksi Tanaman Terong Ungu (Solanum Melongena L)

Water hyacinth (Eichhornia crassipes) and Purun tikus (Eleocharis dulcis) plants are commonly found in rice fields, especially in South Kalimantan, where they act as weeds in the main crop. However, these plants can be utilized as compost to enhance soil nutrients for crops. This study aims to evaluate the effect of compost derived from water hyacinth, Purun tikus, and their combination on the growth and yield of purple eggplant (Solanum melongena). The study uses a Randomized Block Design (RBD) method with four treatments, each repeated six times, resulting in 24 experimental plants as follows: P0 = no treatment (control), P1 = 900 g water hyacinth compost, P2 = 900 g Purun tikus compost, and P3 = a combination of 450 g water hyacinth compost and 450 g Purun tikus compost. The results indicated that, for plant height, treatment P3 yielded an average of 53.61 cm; for leaf count, treatment P3 produced an average of 45.66 leaves; for stem diameter, treatment P1 achieved an average of 9.90 mm; for fruit count, treatment P3 showed an average of 2.16 fruits; and for fresh fruit weight, the best result was achieved by treatment P3, with an average weight of 145.83 g.

Synergistic enhancement of bio-oil production, quality, and optimization from co-pyrolysis purun tikus (Eleocharis dulcis) and plastic waste using response surface methodology

This study investigated the influence of varying pyrolysis temperatures (400–600°C) and biomass-to-plastic waste ratios (100:0, 70:30, 60:40, 50:50, and 40:60) on the product distribution during the co-pyrolysis of Purun tikus (PT) and Polyethylene Terephthalate (PET). The investigation revealed positive synergistic interactions. Notably, the bio-oil yield experienced a significant enhancement under optimal operational conditions (feedstock ratio of 40PT:60PET and a pyrolysis temperature of 600°C), with the yield doubling that of the feedstock ratio of 100PT. The composition of bio-oil compounds was analyzed using Gas Chromatography-Mass Spectrometry (GC-MS), revealing that the most abundant compounds were esters (ranging from 30.1 % to 37.2 % area), phenolics (ranging from 11.3 % to 32.2 % area), and furfural (ranging from 4.5 % to 18.5 % area). The study further explored the impact of different experimental conditions on the yields of bio-oil, bio-char, and syngas through the application of response surface methodology. It was determined that the optimal yield of bio-oil was attainable by adjusting the reaction temperature and the ratio of PT to PET. The identified optimum conditions, which resulted in the maximum bio-oil output of 40.46 %, were a PT to PET ratio of 40:60 and a temperature of 600°C.

Insights into the behavior and kinetics of purun tikus degradation during slow pyrolysis

Purun tikus (Elocharis dulcis), a type of wetland biomass feedstock, is a challenge to the swamp ecosystem as it contributes to pollution in the area. Hence, integrating the use of purun tikus as a source of bioenergy, particularly in the form of bio-oil, is of the highest priority. Nevertheless, there is a lack of research on the degradation rate of purun tikus conversion to bio-oil through pyrolysis. Thus, this study aims to evaluate the rate of destruction of purun tikus in the process of conversion into bio-oil via pyrolysis. In the experiment, a batch reaction vessel was used to carry out slow pyrolysis at temperatures ranging from 300 to 500 °C, and the reaction times ranged from 60 to 120 min. By assuming a first-order process and using the Arrhenius equation, it was possible to figure out the activation energy and the preexponential factort. To determine whether purun tikus destroyed during pyrolysis, an activation energy of 43.317 kJ mol-1 and a pre-exponential factor of 0.351 s-1 were identified.

Aplikasi Pestisida Nabati dan Trichokompos terhadap Penyakit Bercak Daun (Cercospora oryzae) pada Padi Beras Merah di Lahan Basah

Cultivation of brown rice (Oryza nivara L.) in wetlands continues to expand because its consumers continue to increase. This study aims to determine the ability of Trichocompost and a solution of botanical pesticides from kalakai, babadotan and purun tikus in controlling brown spot disease caused by the fungus Cercospora oryzae on brown rice plants in wetlands. Based on the results of observations, the application of trichocompost and purunrat solution was able to reduce the incidence of leaf spot disease from 95.1% in controls to 76.5%. The results of disease intensity showed that the application of trichocompost and kalakai solution was able to reduce disease intensity from 19.55% in controls to 14.10%. The application of trichocompost and babadotan solution increased the number of grains of rice from 216.60 grains in the control to 243.20 grains. The application of Trichocompost and kalakai solution increased the weight of 100 grains from 1.79 g to 2.10 g. The application of only trichocompost, Trichocompost and kalakai solution, trichocompost and babadotan solution, and trichocompost and purunrat solution have the same ability to reduce the incidence and intensity of Cercospora disease. All treatments tested were unable to increase plant height growth.

PERBANDINGAN HASIL PENETAPAN PARAMETER SPESIFIK DAN NON-SPESIFIK ANTARA SIMPLISIA TERHADAP EKSTRAK METANOL PURUN TIKUS (Eleocharis Dulcis)

Eleocharis dulcis is a swamp plant has potential as a traditional medicine. The purpose of this study was to compare the results of determining specific and non-specific parameters on simplicia and methanol extract of purun tikus’s stems. Determination of specific parameters includes organoleptic, macroscopic - microscopic tests, water soluble extract content, ethanol soluble extract content and phytochemical screening such as testing for alkaloids, flavonoids, tannins, saponins and steroids/triterpenoids. Determination of non-specific parameters includes drying shrinkage, determination of total ash content, acid insoluble ash content and heavy metal contamination. The results of the study on the specific parameters of stem extract showed that the simplicia powder was light brown in color, had a characteristic odor that was not pungent and had a bitter taste and on microscopic examination only the simplicia could be observed epidermis, transport bundles, parenchyma and collenchyma fragments,. The results of the non-specific simplicia characterization test showed drying shrinkage of 8.91%, total ash content of 13.79%, acid insoluble ash content of 6.89%. The results showed that both simplicia and methanol extract of purun tikus’s stems met the general requirements for specific and non-specific characteristics except for the total ash content of the simplicia which was declared not eligible.

Biokonsentrasi Faktor (BCF) dan Faktor Translokasi (TF) Purun tikus (Eleocharis dulcis) dalam Fitoremediasi Air Asam Tambang


 
 
 Acid mine drainage is mining waste that contains a lot of sulfate and heavy metals such as Fe and Mn which can cause environmental damage and pollute the ecosystem, therefore it needs to be managed. One way to manage acid mine drainage is with phytoremediation techniques using Purun tikus (Eleocharis dulcis). The ability of Purun tikus to accumulate heavy metals can be known by calculating the bio-concentration factor (BCF) and tranclocation factor (TF). This study aims to determine the value of bio concentration factor (BCF) and tranclocation factor (TF) in rat purun in absorbing Fe and Mn so that it can be used for coal mine acid water management. Sampling was conducted using Convenience sampling method. Analysis of Fe, Mn, BCF and TF levels was carried out using an atomic absorption spectrophotometer. In the study, the bio concentration factor (BCF) value for Fe was 7.53, and for Mn was 30.09. While the value of the tranclocation factor (TF) for Fe is 0.77 or the value of TF less than 1, this indicates that rat Purun in accumulating Fe metal uses a phytostabilization mechanism. Then the tranclocation factor (TF) value for Mn is 1.44 or TF value more than 1, indicating that in accumulating Mn metal, Purun rats use a phytoextraction mechanism.
 
 

Modification of Purun Tikus (Eleocharis dulcis) Long Fiber with Potential as Composite Reinforcement Material

The choice of natural fiber purun tikus (Eleocharis dulcis) as a composite reinforcement material is related to its benefits, such as low price, abundant quantity, renewable, and environmentally friendly. In this research, the effect of alkalizing treatment and hot water immersion on the properties of purun tikus fiber were investigated. The long fiber of purun tikus measuring 20 cm and diameter < 0.064 cm was modified with 120°C hot water immersion and 5% NaOH immersion for 1 hour each. These treatments were applied to improve the properties of purun tikus fiber, such as their properties of chemical (moisture, lignin, cellulose, and hemicellulose), physical (density), and mechanical (tensile strength). The results showed a decrease in the water content, lignin, cellulose, and hemicellulose of purun tikus fiber, while the density and tensile strength increased after the treatment of 120°C hot water immersion and NaOH 5% alkalization. The NaOH 5% alkaline treatment was better than 120°C hot water immersion in terms of reducing water content, lignin, cellulose, and hemicellulose. Although the tensile strength of the modified NaOH 5% NaOH purun tikus fibers is lower than the 120°C hot water immersion treatment, it was still higher than before the modification. It is shown that these fibers blend well in the manufacture of composite materials and improve their mechanical properties.

EKSPLORASI DAN IDENTIFIKASI PURUN DANAU (Lepironia articulata) LOKAL SEBAGAI ADSORBEN ALAMI PADA IKLIM TROPIKA LEMBAB DI KALIMANTAN TIMUR

Purun is one of the endemic plants that naturally grows wild in peat and swamp areas. Purun is commonly found in peat and swamp areas in Indonesia, including in East Kalimantan, especially in Kabupaten Kutai Kertanegara. Purun belongs to the Cyperaceae family. This plant is a typical plant in swamp land. Swamp land is land for a long time during the year is always saturated with water or inundated. Purun is a plant that lives in the wild naturally in areas of peat swamp, tidal swamp and river areas that are acidic sulphate.There are three types of purun known in Kalimantan, namely purun danau, purun tikus and purun bajang. The purun danau (Lepironia articulata Retz. Domin.) has a fundamental difference when compared to the purun tikus and the purun bajang, which is much larger in size than the purun tikus and the purun bajang and has leaves that are tougher like woody and more clearly lined than other. Purun danau also has a cavity that is similar to a bamboo stick. The objectives of the study were to 1. determine the character of purun danau plants in the natural humid tropics habitat; and 2. Knowing the characteristics of purun danau plant habitat. The research design used in this research is descriptive or descriptive research. The results showed that: 1. the morphological character of the purun danau was in the form of a cylindrical stem like a pipe that grew elongated with a tapered tip, had thin partitions that filled the inside, the bulkhead was solid at the base and the stem was shiny green. The outer part of the base is white and covered with leaves shaped like a reddish brown sheath. The tapered end of the stem then grows into a compound flower which will contain many seeds in the generative phase. Purun danau flowers are compound flowers and are located at the end of the stem. The roots of purun danau are fibrous and grow with the stolons. 2. The purun danau habitat is characterized by the presence of water, either always stagnant or flowing water with varying heights (between 100 cm to 300 cm). In addition to the presence of water, purun habitat is also characterized by acidic soil pH conditions (4.10-5.20) and open land without shade. In addition to adapting well in acid sulphate soils, purun danau are also able to absorb heavy metal elements such as Pb, Cd and Zn.

Study of Variation of Plant Types of Vertical SubSurface Constructed Wetland Treating Groundwater Contaminated with Iron (Fe)

Drilling groundwater at the BSD Housing Complex, Malintang Village, Gambut District, Banjar Regency has an iron (Fe) value of 5.98 mg/L. According to the Minister of Health Number 32 of 2017 concerning water health requirements for hygiene and sanitation purposes, the water is above the quality standard, 1.0 mg/L for Iron (Fe). One of the treatment methods used to treat the contaminated groundwater is constructed wetland (CW). CW was chosen because of its relatively low cost and environmentally sound natural wetlands. We used the Vertical Flow Subsurface Constructed Wetland (VSSF-CW) in this study. This study aims to determine the effectiveness of the VSSF-CW system with different local plants, namely Jeringau (Acorus calamus) and Purun tikus (Eleocharis dulcis), in removing iron (Fe) in groundwater. The study used five wood reactors with 90 cm x 30 cm x 40 cm. The results showed that the VSSF-CW system with E. dulcis plant effectively removed iron (Fe) with a higher efficiency value of 85.68% compared to the reactor with A. calamus plant that was 76.72%, and reactor without plant 59,37%. The lowest efficiency of each reactor during the study was on day 5, with values of 58.28%, 37.88%, and 29.43%, respectively. The concentration of iron (Fe) in the VSSF-CW system effluent with Acorus calamus and Eleocharis dulcis plants for 40 days has a value that tends to decrease. Keywords: Vertical Flow Subsurface Constructed Wetland, groundwater, iron, Acorus calamus, Eleocharis dulcis.

Peningkatan Kualitas Kimia Tanah Sulfat Masam dengan Aplikasi Kombinasi Bahan Organik Lokal dan Limbah Agroindustri

The purpose of this research was to assess effect of compost treatment from various local organic materials combined with agro-industrial waste to improved chemical quality of acid sulfate mineral soils, to compare of root dry weight and grain weight milled dryness of Inpara-3. This research was conducted at screen house of Polytechnic Hasnur, Barito Kuala District, South Kalimantan from November 2020 to June 2021. This study used Compeletely Randomized Design (CRD) with Tukey's Honestly Significant Difference (HSD) test a=5%. There were 7 treatments used as, K0 = control. JKD = paddy straw compost 4 t ha-1 and solid decanter 2 t ha-1; JKR = paddy straw compost 4 t ha-1 and solid crumb rubber 2 t ha-1; SKD = empty fruit bunch compost 4 t ha-1 and solid decanter 2 t ha-1; SKR = empty fruit bunch compost 4 t ha-1 and solid crumb rubber 2 t ha-1; PKD = compost of purun tikus (Eleocharis dulcis) 4 t ha-1 and solid decanter 2 t ha-1; PKR = compost of purun tikus 4 t ha-1 and LPKR 2 t ha-1. The treatment was 5 replication so that 35 experimental plant units. The results showed compost paddy straw combinated solid decanter reducing concentration of soluble Fe and Al and can increasing availability of P and K. Treatment of compost empty fruit bunch combinated solid decanter can be increasing pH and total N-mineral. Compost paddy straw combinated solid crumb rubber gave increasing weight on root dry and grain milled dryness.&#x0D; &#x0D; Keywords: acid sulfate soil; agroindustrial wasted; compost

Potential of local plant Eleocharis dulcis for wastewater treatment in constructed wetlands system: review

Plants have a vital role in constructed wetlands because they provide oxygen in removing pollutants, as a medium of microorganisms, as absorbers of nutrients and other pollutants, must be resistant to high levels of pollutant loads and stressful conditions. Several plants have potential for constructed wetland, namely Phragmites sp., Typha sp., Canna indica, Colocasia esculenta, Eichornia crassipes, Eleocharis dulcis, and others. Eleocharis dulcis is a local plant commonly found in South Kalimantan. Eleocharis dulcis in the local, namely Purun tikus, grows in tidal swamps and grows in areas of high soil acidity (pH 2.5 – 3.5). Eleocharis dulcis can be used in tackling reclamation waste of acid sulfate soil which can absorb 1.45% of N elements; Cu 15 ppm; P 0.08%; Zn 48 ppm; Mg 0.16%; Fe 1.386 ppm; S 0.18%; Mn 923 ppm; K 2.05%; and Ca 0.22%. According to several studies that have been carried out, Eleocharis dulcis have been shown to reduce several pollutant loads such as Hg 99.84%; Pb; Cd; Fe 85.68%; SO4; Mn 78.94%; BOD 98.74%; COD 98.73%; and turbidity 80% also. The local plant Eleocharis dulcis can be potentially used as wastewater treatment, especially in a constructed wetland systems.

UJI ATRAKTAN PADA EKSTRAK PURUN TIKUS (Eleocharis dulcis) SEBAGAI PERANGKAP HAMA PENGGEREK BATANG PADI PUTIH

Purun tikus (Eleocharis dulcis) are wild plants found on swamp land which are quite abundant in South Kalimantan. This research was conducted to find out the most active extract from Chinese water chestnut as an attractant of white rice stem borer (Scirpophaga innotata). Purun tikus were made into extracts using the stepwise extraction method using n-hexane, ethyl acetate, and methanol, with yields of 0.74%, 0.81%, and 7.58%, respectively. The results of the attractant test on purun tikus extract showed that the extract of n-hexane purun tikus was the most active extract as an attractant in white rice stem borer (Scirpophaga innotata). The results of the analysis using GC-MS showed that the extract of n-hexane purun tikus contained several compounds, namely 2-methyltetrahydrofuran, isopulegol, citronellal, citronellyl acetate, βcitronellol, Z-citral, 1-bromo-3,7-dimethyl-2,6-octadiene, citral, linalyl acetate, trans-caryophyllen, trans-phytol, verticellol.

ANALISIS KANDUNGAN KIMIA DAN SIFAT SERAT TANAMAN PURUN TIKUS (Eleocharis dulcis) ASAL KALIMANTAN SELATAN

Purun tikus (Eleocharis dulcis) is an aquatic plant which grows in greatamount in swamp lands in South Kalimantan. This research is conducted to findout chemical content and fiber properties to know the potential utilization of thisplants. The results showed that the water content of purun tikus plant is 92,68%,extractive in alcohol-benzena content is 9,53%, lignin content is 26.4%; and thecellulose content is 32,62%. The study of purun tikus fiber anatomy have beencompleted with the results of the fiber diameter is equal to 5.89 μm; lumendiameter is 2.68 μm, cell wall thickness is 1.61 μm and fiber length is 1.68 mm.The value of the derivative dimension of purun tikus fiber obtained as follows:runkel ratio is 1.2; mulstep number is 38.4 (%), power loom is 285.45, value offlexibility is 0.45 and stiffness coefficient is 0.27. All results suggested that puruntikus plants offers potential for cellulose and fiber resources.

MODIFICATION OF PURUN TIKUS (ELEOCHARIS DULCIS) AS A NATURAL FIBER COMPOSITE USING KMnO4 AND NaOH

The choice of natural fibers as a composite reinforcing material is related to the advantages of being cheap, abundant, renewable, and environmentally friendly. This research was conducted to study the effect of de-lignification treatment on the properties of purun tikus (Eleocharis Dulcis) fiber. Purun tikus fiber has been modified with the alkaline treatment of KMnO4 2% and NaOH 5%. This treatment was mainly applied to improve the physical and chemical properties of purun tikus fiber. Changes in chemical characteristics (water, lignin, cellulose, and hemicellulose), physical (density), mechanical (tensile strength), morphology, and elemental content of purun tikus before and after treated with alkaline were studied. The measurements showed an increase in water content and density while lignin, cellulose, and hemicellulose were decreased. Thus the alkaline treatment of KMnO4 2% and NaOH 5% reduced lignin, cellulose, and hemicellulose of the purun tikus fiber to reduce the size of the fibers, as shown in SEM measurements. There was a change in elemental content after being treated with KMnO4 2% and NaOH 5%. NaOH treatment was better than KMnO4 treatment in terms of removing lignin and hemicellulose in purun tikus fiber. Although the tensile strength of the purun fibers treated with KMnO4 2% and NaOH 5% were lower than untreated, with less lignin, cellulose, and hemicellulose, it is expected that these fibers will blend better in the composite and improved its mechanical properties.

Pyrolysis of purun tikus (Eleocharis dulcis): Product distributions and reaction kinetics

Pyrolysis of typical wetland biomass, namely purun tikus (Eleocharis dulcis) was experimentally studied herein for the first time. The pyrolysis of purun tikus leaves for bio-oil production was conducted under different reaction temperatures (300, 400, and 500 °C) at fixed pressure and different particle size distributions (0.2, 0.4, and 0.6 mm). Characteristics of bio-oil and product distributions were studied. The bio-oil yield as high as 31% was obtained at 500 °C and 0.6 mm of particle size. Meanwhile, the highest bio-char yield of 62% was obtained at 300 °C and 0.2 mm of particle size. The bio-oil was characterized by gas chromatography/mass spectrometry (GC/MS). Phenol yield as high as 18.23% was achieved at 500 °C and 0.6 mm of particle size under atmospheric pressure. A reaction model was proposed, and the reaction kinetic parameters by assuming the first-order kinetics were determined. The reaction was observed to follow the Arrhenius behavior, and the kinetic model agreed well with the experimental data.

Investigation on the antibacterial activity of the methanol extract of purun tikus root (Eleocharis dulcis)

One of the vegetations growing in tidal swampland and lebak is purun tikus (Eleocharis dulcis) which belongs to the Cyperaceae family. This research studied the antibacterial activity of methanol extract from purun tikus root on Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 bacteria. The chemical compounds of purun tikus root were extracted using the maceration method with methanol solvent, followed by thickening the filtrate using a rotary evaporator. The results of phytochemical screening showed that purun tikus root contains phenolic, tannin, flavonoid, and terpenoid compounds. The result showed that this extract has the activity to inhibit the growth of S. aureus ATCC 25923 and E. coli ATCC 25922 bacteria at a concentration of 2500 µg/ml and 3000 µg/ml, respectively. The Minimum Inhibitory Concentration (MIC) value of the methanol extract from purun tikus (E. dulcis) root for both S. aureus ATCC 25923 and E. coli ATCC 25922 bacteria was 6,25 µg/ml. Based on the linear regression calculation, S. aureus ATCC 25923 and E. coli ATCC 25922 inhibited at a concentration of 0.96 !g/ml and 1µg/ml, respectively. The GC-MS spectrum showed that methanol extract of purun tikus contained compounds of the furfural group, namely furfural, 5-methyl furfural, and furfuryl alcohol.

The Effect of Straw and Purun Tikus (Eleocharis dulcis) Compost to Rice Physiological Traits, Iron Toxicity and Grain Yield on Acid Sulfate Soils

The experiment was aimed to determine the effect straw and Eleocharis dulcis compost on physiological traits and grain yield of rice grown in acid sulfate. The experiment was conducted in 2010 WS in greenhouse of ISARI, Banjarbaru. The soils was sampled from rice fields of acid sulfate soil. The experiment was employed Factorial CRD, in which first factor was three varieties and second factor were six rates straw and E. dulcis compost. Variables observated were physiological traits (root length, stomatal density, transpiration rate, total chlorophyll content, polyphenol oxidase and peroxidase activity), Fe toxicity symptoms and grain yield. The result showed that application of 5.0 t ha−1 straw and 5.0 t ha−1 E. dulcis compost resulted in the best physiological traits of rice plants, decreased Fe toxicity, but led to increase in grain yield. Inpara 1 was more tolerant to iron toxicity, better physiological traits, lower Fe toxicity symptoms, and higher grain yield compared to Inpara 2. On the other hand, IR64 was susceptible to iron toxicity and the lowest observed. Results of the experiment demonstrate that increasing rate of applied E. dulcis compost up to 5 t ha−1 may increase physiologal traits and grain yield and decrease Fe toxicity symptoms.

The role of iron oxidizing bacteria to the quality of leachate on acid sulphate soil

The problem encountered in acid sulphate soil is the presence of pyrite (FeS2) which causes soil to have highly acid reaction when the pyrite is oxidized. The decline in quality not only occurs on the soil but also on the quality of the surrounding waters. One way to improve the quality of the leachate is by draining it through biofilter plants in the form of purun tikus (Eleocharis dulcis) and bulu babi (Eleocharis retroflaxa) which can absorb or neutralize these elements. The purpose of this research was to know the inoculant influence of iron oxidizing bacteria to leachate quality in acid sulphate soil. The research was conducted on a pot scale in greenhouse. The research was in randomized block design (RBD) of 3-factors with 3 replications. The first factor was inoculants, the second factor was water management, and the third one was phytoremediation material (Eleocharis dulcis and Eleocharis retroflaxa). The results showed that the plant height in the inoculant treatment+wood charcoal was in the range of 89.33−95.33 cm, while that in the inoculant treatment+husk charcoal was in the range of 89.50­­­−93.00 cm. Meanwhile, the yield of rice with bacteria oxidizing iron inoculant+wood charcoal was higher, which was at 6.77 ton.ha-1 than inoculant treatment of oxidizing iron+husk charcoal which was only 5.95 ton.ha-1.

Utilization of Purun Tikus (Eleocharis dulcis) as Bioboard Raw Material with Heat Press

Forests is an abundant natural resource that provide our wood needed. Nowadays, forest barely able to maintain the optimum condition due to the high rate of deforestation because of fulfilled wood consumption and also forest degradation. There is an alternative to substitute wood fiber such as purun tikus. Purun tikus (Eleocharis dulcis) are wild plants that can adapt well to tidal swamp land. Research conducted with 2 factors of Factorial Complete Randomized Design. Factor 1 is giving tapioca adhesive with 4 levels of treatment, 0%, 10%, 20%, and 30%. Factor 2 is giving pressure load using hot press with 2 levels of treatment, 5 MPa and 8 MPa. The best treatment to obtain low density according to on SNI 01-4449-2006 fiber board that occurs in the treatment without the provision of adhesives while to get a fiber board with a medium density that occurs in the treatment by giving adhesive 10%, 20%, and 30%.

The Effect of NaOH Immersion Time to Physical Properties of Purun Tikus (Eleocharis dulcis) Cement Board Composite

A research in cement board composite made from purun tikus (Eleocharis dulcis) has been conducted. The aims are to determine its physical properties as variations of purun tikus fibers mass and NaOH immersion time. The results were yielded 5.00 - 15.15%, 0.52 - 0.76 g / cm3 and 0.05 - 0.18%, respectively for water content, density and thickness development. For moisture content and density values, the results were not met the standard of SNI 03-2104-1991, while for thickness development of all samples met the standards. The results showed fluctuating changes in water content, density and thickness development, which were influenced by the immersion time and mass of purun tikus fibers. From the results, it can be concluded that shorter immersion time and less purun tikus fibers yielded a smaller value of water content and thickness development, while density was become higher.