Water Hyacinth Plants Research Articles

Keterkaitan Tingkat Efektifitas Metode Fitoremediasi Terhadap Tingkat Pertumbuhan Media Eceng Gondok Pada Limbah Cair C6+

Liquid waste of Cr6+ is often produced by nickel ore mining companies, one of which is CV. Unaha Bakti Persada has a Cr6+ concentration of 0.78 ppm which has not yet reached the 0.1 ppm quality standard, so it is necessary to treat Cr6+ waste using an in vitro phytoremediation technique for water hyacinth media of E. azurea and E. crassipes. The purpose of this study was to determine the effectiveness of phytoremediation method, the level of damage to water hyacinth and the rate of growth of the water hyacinth plant. The study used an in vitro phytoremediation method for water hyacinth media E. crassipes and E. azurea for 15 days. The results showed that the effectiveness of water hyacinth E. azurea was 87% able to reduce the concentration of Cr6+ 0.78 ppm to 0.1 ppm within 15 days, while E. crassipes and the combination of E. crassipes and E. azurea were 64%. The rate of water hyacinth damage to Cr6+ wastewater was faster in E. azurea, namely 40% compared to E. crassipes by 27% and the combination of E. crassipes and E. azurea by 13%. The growth of water hyacinth in Cr6+ wastewater was faster in the combination of E. Crassipes and E. azurea, namely plant weight 45%, root length 38%, plant height 23% compared to E. azurea, namely plant weight 35%, root length 32%, height plant 17%, and E. crassipes, namely plant weight 45%, root length 38%, plant height 7%.

Preparation and Characterization of Water Hyacinth-Derived Cellulose Nanofibers for Fuel Cell Membrane application

Abstract Cellulose nanofibers (CNF) derived from biomass materials were used for various applications such as medicine, packaging, wastewater treatment, and fuel cells. In this study, CNF was synthesized from water hyacinth plants obtained from Laguna de Bay. Collected water hyacinth stems were cleaned, washed, air-dried, and oven-dried for fiber extraction. Chemical and mechanical treatments were used to extract the CNF from the water hyacinth. The fibers were treated with 4 % potassium hydroxide solution and homogenized at 25,000 rpm for 3 mins. The resulting CNF was characterized using Scanning Electron Microscopy (SEM) to investigate the microstructures and morphology. Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (AR-FTIR) was used to determine the chemical composition of the CNF. Lastly, crystallinity was examined by using an X-Ray Diffraction (XRD) to ensure that the extraction of CNF was successful. The resulting properties of CNF ensure its potential when used as a pure material or added as a composite for the membrane of fuel cells.

RESEARCH ON COOKING OIL ABSORBENT PADS USING WATER HYACINTH MATERIALS

Cooking oil is an indispensable ingredient in everyday family cooking. The oil after use is often discharged directly into wastewater systems, leading to risks of environmental pollution, water pollution, clogging of drainage systems... In recent years, water hyacinth plants have been considered weeds, floating on rivers, canals, ponds and lakes, obstructing the circulation of boats and preventing water flow. Water hyacinth plants are often found in large rivers and almost no one cares about their uses, making them truly wasteful. Realizing the flexibility of water hyacinth when dried, it can be woven into pieces with good absorbent properties, our team has researched using water hyacinth as a material to absorb used cooking oil that is discarded into the environment. school. The research uses the main methods of experimental method and sample analysis method in its research. The result is that a product that absorbs discarded cooking oil scum is formed and is tested for cooking oil contaminated water with results consistent with QCVN 14:2008/BTNMT. The purpose of the research is to find effective products to absorb discarded cooking oil to save costs and contribute to environmental protection. The problem of using naturally available materials to create products that absorb cooking oil scum at the same time solves two current environmental problems. The research is a preliminary result, so there are still many shortcomings. We hope that in the future there will be further research to make the product more and more perfect

Design, characterization and implementation of cost-effective sodium alginate/water hyacinth microspheres for remediation of lead and cadmium from wastewater

The aquatic plant water hyacinth was dried then cross-linked with sodium alginate to produce ionic cross-linked microspheres. The mechanism of controlling cadmium (Cd) and lead (Pb) in wastewater was tested by DFT at B3LYP level using LANL2DZ basis set. Modeling results indicated that the hydrated metals could interact with sodium alginate (SA)/water hyacinth (WH) microspheres through hydrogen bonding. Adsorption energies showed comparable results while total dipole moment and HOMO/LUMO band gap energy showed slight selectivity towards the remediation of Pb. FTIR spectra of cross-linked microspheres indicated that WH is forming a composite with SA to change its structure into a microsphere to remove Cd and Pb from water. Raman mapping revealed that the active sites along the surface of the microspheres enable for possible adsorption of metals through its surface. This finding is supported by molecular electrostatic potential and optical confocal microscopy. Atomic absorption spectroscopy results confirmed that the microspheres are more selective for Pb than Cd. It could be concluded that WH cross-linked with SA showed the potential to remove heavy metals through its unique active surface as confirmed by both molecular modeling and experimental findings.

Analyzing water hyacinth plants from two South African rivers for the detection of seven pharmaceuticals and their metabolites.

Water hyacinth plants (Eichhornia crassipes Mart.) collected from two South African rivers were analyzed in order to investigate their suitability for judging the presence of pharmaceuticals in the water. Thereby, a number of drugs, including amitriptyline, atenolol, citalopram, orphenadrine, lidocaine, telmisartan, and tramadol, could be detected. Particularly for the latter substance, relatively high concentrations (more than 5000ngg-1 dry plant material) were detected in the water plants. Subsequently, the plant extracts were also screened for drug-derived transformation products, whereby a series of phase-one metabolites could be tentatively identified.

Solid Formulation of <em>Trichoderma virens</em> for the Management of Banana Anthracnose Caused by<em> Colletotrichum musae</em>

Trichoderma spp. widely used as biocontrol agents for controllin g a wide range of plant diseases. Banana anthracnose caused by Colletotrichum musae is a prominent, widely distributed postharvest disease. This study was carried ou t to assess the effectiveness of locally isolated Trichoderma virens against C. musae and the mass producti on of T. virens using locally available, low-cost solid substrates. T. virens was tested for the inhibition of C. musae isolate in -vitro and in-vivo by dual plating and inoculating into two varieties of ripened banana: Kolikuttu and Cavendish, respectively. For mass production, T. virens was inoculated into different solid substrates including scraped coconut waste, sawdust, tea waste, seeds from rice, finger millet, and maize, dried pieces of water hyacinth plant, paddy straw, and Panicum maximum leaves; regularly taken spore co unts (cfu/g) and checked for viability by plating after 12 weeks of storage. The pathogen inhibition percentag e by T. virens was 74.10%. Disease severity was 0% in Kolikuttu and 19% in Cavendish after 5 days of T. virens spore appli cation (1x107 spores/ml). Significantly higher (p≤0.05) mean spore production resulted in rice seeds (9.345x109 spores/g) compared to the other substrates and the least resulted in sawdust (1.808x109 spores/g) at the 8th week after T. virens inoculation. Spores of T. virens were viable in all the tested substrates throughout the study period. The results conclude that T. virens is capable of controlling banana anthracnose and can be efficiently mass-produced by using rice seeds, dried pieces of P. maximum leaves, and f inger millet seeds as substrates.

Penyisihan Kandungan Perak dalam Limbah Cair Pencucian Film Melalui Proses Biofiltrasi dengan Tanaman Eceng Gondok

Wastewater produced from the film washing process in photo studios generally has very high contents of heavy metals, such as silver (Ag). This situation can cause various health and environmental problems if it is not treated before disposal. Therefore, this research was aimed to reduce the silver content in the wastewater through biological processes. This study was conducted using a biofiltration process using water hyacinth plants. Film washing waste was first acclimatized into concentration of 2.5% and the initial silver content was measured. Afterwards, water hyacinth of 600, 900, 1200, and 1500 g, respectively, was planted into the wastewater. Waste samples were subsequently taken and analyzed every 2 days. The highest removal efficiency of 99.94% was yielded for 1500 g of plant. In this condition, the silver content in wastewater met the environmental quality standards.

Optimizing the Role of User and Maintainer Groups (Kpp) in the Settlement Quality Improvement Program (Case Study of Klasabi Slum Settlement, Sorong City)

The purpose of this research is to optimize the role of the user and maintainer group (KPP) in the Klasabi slum quality improvement program of Sorong City. In this case, the environmental conditions in this settlement are reviewed, the role of KPP is evaluated, and optimization strategies are also formulated that can be used for the environmental management of Klasabi slums in Sorong City. This research is quantitative with the method used in this research, namely the descriptive method with a case study technique through data collection from the results of distributing questionnaires, interview results, direct observation, and using other official documents analyzed using validity test analysis and reliability tests. Based on the results of the data validity test and the data reliability test, it was found that the research data or questionnaire data used in the study was valid and reliable. research data or questionnaire data used in this study is valid or reliable. The results showed that environmental conditions, seen from several perspectives, including ecological, economic, social, and cultural, can be considered good. However, when viewed in ecological conditions, especially in road and drainage conditions, it is still considered adequate by the community because there is no equal distribution of facility development. Also, the role of the user and maintainer group (KPP) is assessed as not optimal in carrying out its duties and responsibilities; this is supported by the results of the conducted interviews and observations made by researchers. In addition, optimization strategies can be carried out, such as structuring the Klasabi area around Deo Airport in Sorong City, handling slum houses by the government to support the development of water tourism, optimizing the use of water hyacinth plants that can be developed by community members using SIKIM and BLK facilities, and providing capital loans to support the business of making traditional snacks, traditional Papuan handicrafts, and Papuan craftsmen certification training in Sorong City.

Cotton aphid (Aphis gossypii Glover: Aphididae) influence associated to water hyacinth nutrient (Pontederia crassipes Mart.: Pontederiaceae) in lath house conditions in Great Rift Valley of Ethiopia

The cotton aphid, Aphis gossypii Glover is a polyphagous herbivore known worldwide. The aphid infestation could be considered as a challenge to crops, but an opportunity for alien invasive weed management. Hence, this study was initiated to investigate the potential of cotton aphid on the management of water hyacinth. Aphid-infested water hyacinth plants were used as a stock for rearing the aphid in a lath house at Ethiopian Sugar Corporation, Research and Development Center, Wonji. After rearing, randomly collected 30 aphids were placed onto water hyacinth plants cultivated under three nutrient levels. Aphid population, water hyacinth biomass and percent nitrogen and phosphorus were analyzed. The water hyacinth treated with a high nutrient level had the highest (295.0) mean aphids on apical leaves followed by the middle (178.3) and basal (104.7) leaves. The water hyacinth subjected to medium and no aphid treatment had the highest dry (44.3 g) biomass. However, when treated with a low nutrient level and aphids resulted in the lowest dry (31.9 g) biomass. Nitrogen and phosphorus concentrations were found high in the water hyacinth that received a high nutrient and no aphid treatment. The presence of the aphids reduced the biomass and nutrient concentration of the invasive weed. The findings of the current study revealed that the cotton aphid affected the water hyacinth in the lath house conditions in Ethiopia.

Geochemical and petrological studies of high sulfur coal and overburden from Makum coalfield (Northeast India) towards understanding and mitigation of acid mine drainage

Opencast coal mining produces trash of soil and rock containing various minerals, that are usually dumped nearby the abandoned sites which causes severe environmental concern including the production of acid mine drainage (AMD) through oxidation pyrite minerals. The current study entailed assessing the potential production of AMD from an opencast coal mining region in Northeast part of India. In order to have a comprehensive overview of the AMD problem in Makum coalfield, the physico-chemical, geochemical, and petrological characteristics of the coal and overburden (OB) samples collected from the Makum coalfield (Northeast India) were thoroughly investigated. The maceral compositions reveal that coal features all three groups of macerals (liptinite, vitrinite, and inertinite), with a high concentration of liptinite indicating the coal of perhydrous, thereby rendering it more reactive. Pyrite (FeS2) oxidation kinetics were studied by conducting the aqueous leaching experiments of coal and (OB) samples to interpret the chemical weathering under controlled laboratory conditions of various temperature and time periods, and to replicate the actual mine site leaching. Inductively coupled plasma-optical emission spectroscopy (ICP-OES) was operated to detect the disposal of some precarious elements from coal and OB samples to the leachates during our controlled leaching experiment. The Rare earth element (REE) enrichment in the samples shows the anthropogenic incorporation of the REE in the coal and OB. These experiments reveal the change in conductivity, acid producing tendency, total dissolved solid(TDS), total Iron(Fe) and dissolved Sulfate(SO42−) ions on progress of the leaching experiments. Moreover, the discharge of FeS2 via atmospheric oxidation in laboratory condition undergoes a significant growth with the rise of temperature of the reaction systems in the environment and follows pseudo first order kinetics. A bio-remediative strategies is also reported in this paper to mitigate AMD water by employing size-segregated powdered limestone and water hyacinth plant in an indigenously developed site-specific prototype station. Apart from neutralisation of AMD water, this eco-friendly AMD remediation strategy demonstrates a reduction in PHEs concentrations in the treated AMD water.

Experimental investigation of the effect of microwave power on the chemical looping gasification of aquatic plant water hyacinth

In this study, the gaseous products and tar characteristics of chemical looping gasification of aquatic plant water hyacinth were investigated under different microwave powers. It was found that the total gas production, the proportion of (CO and H2), and the cold gas efficiency increased from 0.54 Nm3/kg, 49.73 %, 66.52 % to 0.68 Nm3/kg, 67.76 %, and 78.66 %, respectively, as the microwave power increased from 400 to 1000 W. However, the yield of tar was reduced with the increasing microwave power. With the increase of microwave power, the specific surface area is increased due to the formation of pores on the surface of the oxygen carrier. Besides, the addition of microwave power promotes the release of lattice oxygen, which brings a higher reduction degree of Fe species in the oxygen carrier. Furthermore, the carbon attached to the surface of the oxygen carrier changes from fragmented carbon deposition to layered carbon deposition, which effectively avoids the rapid deactivation of the oxygen carrier. Therefore, the gasification reaction rate can be increased and better gas quality be obtained under higher microwave power conditions for chemical looping gasification of water hyacinth.

Coupled adsorption-phytoremediation treatment of cellulose-reactive blue dye in a sustainable multi-step pilot-scale process.

A single-step dye removal strategy from wastewater is inadequate for concentrations above 100mg/L. In order to address this limitation, the adsorption of high dye concentrations followed by phytoremediation is a potential approach for the treatment of dye-contaminated wastewater. This combined method utilizes physical adsorption and biological processes to remove dyes from wastewater. Herein, we investigated a pilot-scale multi-step cascaded process where batch adsorption and fixed-bed column adsorption were combined with phytoremediation to remove cellulose-reactive blue dye at 200 to 500mg/L concentrations. The batch adsorption utilized low-cost water hyacinth root powder (WHRP) bioadsorbent having 670 m2/g surface area, whereas the fixed-bed column adsorption used sand having a surface area of 75 m2/g. The phytoremediation process utilized water hyacinth plants in a series of ponds. The effluent from one unit is fed to the next until the dye is removed to more than 98% for all concentrations considered in this study. Pilot-scale experimental data fitting to adsorption isotherms and kinetics were performed to gain insight into the pilot-scale adsorption mechanism. The fixed-bed sand column adsorption was conducted at different inlet dye concentrations, flow rates, and bed heights. The breakthrough curves were fit to the Thomas, Yoon-Nelson, and Bohart-Adams models. The effluent from the fixed-bed column was transferred to phytoremediation ponds, where complete dye removal was achieved. Overall, data collectively presented in this study demonstrated that the combined adsorption and phytoremediation approach offers a potential solution for the remediation of high dye concentration in wastewater, providing an effective and sustainable treatment option.

Water Hyacinth Plant Fibre Characterization

This work is on the specie of the water hyacinth (WH) in the Northern part of Nigeria taken from the lake in Jalingo in the Sahel region of the country. The basic characteristics of the fibres are studied for use in concrete and other allied construction works. They are subjected to physical and chemical tests for the determination of their properties. X-ray diffraction and scanning electron microscopy are applied to study the crystalline phases and mineral oxides, and the morphology and structural characteristics of the WHFs. The TGA/DTA and FTIR methods of analysis are applied to the WHFs to identify and investigate the thermal stability and percentage of weight loss on temperature, and the SEM for the morphology and structural characteristics of the WH fibre. The results show that the presence of peaks on the spectra of the cellulose samples corresponds to bands of microcrystalline cellulose. The WH plant fibre has a moisture content of approximately 13.7 %, density of 666.7 kg/m3, specific gravity of 0.86, and water absorption of 1067 %, and the cellulose, hemicellulose, lignin are 14.1, 21.5, 7.1 %, respectively. The WH fibre has a tensile strength of 0.12 MPa, Young Modulus of 7.7 GPa, elongation of 4.8 %, tensile extension at break of 2.89 mm, and energy at break of 1.04 x 10-3 J. The XRD diffractogram characterization shows that the WH fibre is crystalline in nature, while the FT-IR shows the functional group change of each treatment respectively. The thermal decomposition process of the WH fibre resulted in similar TG and DTG curves due to being lignin cellulosic material. These curves showed a distinct DTG peak (cellulose) and a high-temperature tail (lignin). The morphology of WH fibre shows a well-shaped fibril with a rigid lignin structure coated surface with the capacity to hold the liquid contents with good absorbency. The chemical compound compositions of the WH fibre contains Ca, K, Cl, C, Al, Si, Fe, S, Y, Ti, P, Mg, Na, and N.

TOXICITY TEST OF WASTE OIL BEFORE AND AFTER TREATMENT USING PHYTOREMEDIATION ON BIOINDICATORS

Silugonggo River is a river that crosses Juwana District, Pati Regency, Central Java, which empties into the Java Sea. Industrial activities and workshops around the Silugonggo River cause river water to become polluted with used oil.. Even though many people around the river use the Silugonggo River for daily activities, one example is as a place to find fish for side dishes and traded.. The purpose of this study was to determine the concentration of lead in river water contaminated with used oil waste and the LC50 value of 0-96 hours against bioindicators, namely tilapia (Oreochromis niloticus), before and after being processed using phytoremediation. This research phase includes: 1) toxicity tests before treatment consisting of: preliminary tests with waste concentrations of 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100%, and actual tests with waste concentrations of 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24%; 2) The process of treating waste oil with phytoemidiation using water hyacinth and kale plants is tested for plant weight variations. Plant weight variations are 200 grams, 300 grams, 400 grams, and 500 grams, and the process of processing waste oil is carried out continuously; 3) Post-treatment toxicity test consisting of: preliminary test with waste concentrations of 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100%, and actual tests with waste concentrations of 42, 43, 44, 45, 46, 47, 48, 49, 50, and 51%. The results showed that the effective weight in reducing lead in water hyacinth plants and kale plants was 500 grams with lead weight being <0.0058 mg / L (under Quality Standards according to the Decree of the Government Regulation of the Republic of Indonesia Number 82 of 2001 concerning Water Quality Management and Water Pollution Control). The LC50 value of 96 hours of waste oil before processing is 19.66%. The LC50 value 96 hours after processing is 46.69%.

Fitoremediasi Limbah Cair Tahu Menggunakan Tumbuhan Eceng Gondok (Eichhornia crassipes) dan Arang Kayu

Tofu liquid waste produces toxic compounds that can pollute the environment. Pollution due to tofu liquid waste causes the aquatic environment to become dirty and smelly. Phytoremediation is considered an innovative, economical and relatively safe technology for the environment, because phytoremediation is an effort to use plants to decontaminate waste. Water hyacinth is considered a weed in waters, but has the ability to absorb organic substances, inorganic substances and heavy metals which are pollutants. Wood charcoal can be used as a pollutant absorber in water purification systems. This research aims to improve the quality of tofu liquid waste with a phytoremediation process using water hyacinth plants and wood charcoal with TDS, pH and COD test parameters. This research used 18 experimental tanks with 3 treatments and 6 replications. P1 (100% EG), P2 (75% EG + 25% AK), P3 (50% EG + 50% AK). In this research, the phytoremediation process using water hyacinth plants and wood charcoal was able to improve the quality of tofu liquid waste. Based on the results of the Two Way ANOVA test, it is known that phytoremediation treatment has a significant effect on the test parameters with a significance level of 5%. The results of the phytoremediation study showed TDS levels from 610 mg/L to 589 mg/L; pH from 5.1 to 7.17; and COD from 3000 mg/L to 115.83 mg/L.

PELATIHAN PEMBUATAN PUPUK KOMPOS BERBAHAN ECENG GONDOK DI DESA KUALA BA’U KECAMATAN KLUET UTARA

ABSTRACT The enclosure of the Krueng Matee waters by vegetation can threaten the preservation of underwater biota, such as fish and shrimp due to lack of oxygen and sunlight, thus the water hyacinth plants reproduce as weeds in the waters of the Krueng Matee river, Kuala Ba'U Village and affect the livelihoods of Kuala Ba'U fishermen. One of the efforts that can be made to overcome water hyacinth weeds is to utilize water hyacinth plants for compost. This community service activity aimed to provide skills in processing water hyacinth into compost for the people of Kuala Ba'U Village. The stages in implementing this activity consisted of field observations, carrying out village administration, the Participatory Action Research (PAR) method, preparation of materials and a multipurpose counter machine. The result of this community service was the availability of compost from water hyacinth as well as a good response and welcome from the community and community leaders of Kuala Ba'U Village because the community gained knowledge and skills in processing water hyacinth into compost, thereby reducing water pollution and improving the community's economy, especially for farmers. In addition, this activity can also normalize the estuary of the Krueng Matee river from water hyacinth weeds, so fishermen can return to fishing and catching fish.

Eco-friendly technology to remove heavy metals from waste water using phytoremediation (water hyacinth ): A review

Environmental contamination, especially water contamination, is a concern in both developed and developing countries. Contamination of water sources with heavy metals is a critical issue that negatively affects living organisms. Because it is not biodegradable, it is stable in the environment, it has a large dispersion with water, and it can accumulate biologically, so there was a need to remove these minerals from wastewater to the permissible limits, and appropriate solutions had to be found. Phytoremediation is a better alternative than traditional physiochemical and biological methods for treating polluted water containing high levels of heavy metals because of its cost-effectiveness and environmental friendliness. Water hyacinth is a floating plant with long roots and green leaves that floats above the surface of the water and is notorious for threatening the survival of aquatic organisms. But it is considered a promising technique for removing pollutants from water, and the plant has been used for various other applications such as the production and generation of ethanol, paper production, and green manure. It was a good support for the technocrats in controlling the growth of this plant, which is a very promising method that removes pollutants with high efficiency and low cost, avoiding many of the drawbacks of traditional methods. This paper presents a comprehensive review of the water hyacinth plant for the treatment of heavy metal contamination in wastewater. This paper also discusses other potential uses of the water hyacinth plant.

Ability of Water Lettuce (Pistia stratiotes) And Water Hyacinth (Eichhornia crassipes) To Remove Methylene Blue Anionic Surfactant (MBAS) From Detergent Wastewater

ABS was the first surfactant used in detergent formulations, but because its molecular structure is branched, it is difficult to decompose biologically, making ABS a toxic compound for the environment. This study aims to remove MBAS surfactant, using a combination of phytoremediation and filtration methods to remove surfactant (MBAS) Chemical Oxygen Demand (COD) from detergent wastewater by optimizing operating factors such as pH, contact time, plant type, and filter media. Water lettuce (Pistia stratiotes) and water hyacinth (Eichhornia crassipes) were selected as plant species and silica-activated carbon was used as filter media. Water lettuce and hyacinth were grown in a 10-liter reactor with detergent wastewater samples for 6 and 12 days. Filter media are placed in the reactor in use, and aeration is done. The efficiency for reducing COD was 81.73%, and the efficiency for surfactant was 99.42% for each experiment, which was thought to be because of plant adsorption and filtering processes. The water lettuce (Pistia stratiotes) plant had the maximum adsorption capability for all the qualities evaluated, with a surfactant content in the roots of 27543.24 (mg/kg MBAS), compared to the water hyacinth plant, which only absorbed 2597.95 (mg/kg MBAS).

Pemanfaatan Eceng Gondok sebagai Adsorben dengan Perlakuan Awal untuk Menurunkan Kadar Logam Berat Cu

Industri kimia yang dalam prosesnya menggunakan katalis tembaga ataupun garam tembaga biasanya dalam limbah yang dibuang ke lingkungan juga akan terikut logam berat tembaga (Cu). Mengingat bahaya yang ditimbulkan oleh logam berat tembaga, maka dilakukan upaya untuk mengurangi kadar limbah tembaga di perairan. Salah satu metode yang dapat mengatasi kelebihan logam Cu adalah dengan proses adsorpsi. Proses adsorpsi memiliki banyak keuntungan, diantaranya dalam pengadaan media lebih ekonomis dan tidak men-imbulkan efek samping yang beracun. Tanaman Eceng gondok merupakan tanaman yang memiliki kandungan karbon cukup tinggi, sehingga tanaman eceng gondok berpotensi untuk dijadikan bahan baku pembuatan karbon aktif. Penelitian ini akan memeplejarari pembuatan eceng godondok sebagai karbon aktif. Proses dalam pembu-atan karbon aktif diawali dengan memasak eceng gondok dengan larutan NaOH untuk meningkatkan jumlah selulosa sebagai bahan utama pembutan karbon aktif. Kemudian eceng gondok dikeringkan dan dijadikan ser-buk. Selanjutnya serbuk eceng gondok diaktivasi dengan HCl. Proses uji adsorben dilakukan dengan menam-bahkan karbon aktif pada larutan CuSO4 dengan variabel konsentrasi 2 M, 2.4M, 2.8 M, 3.2 M, 3.6 M dan waktu pengontakkan 25, 35, 50, 65, 80 menit. Hasil analisa dari metode spektrofotometri serapan atom (AAS) bahwa semakin besar konsentrasi dan waktu pengontakan maka semakin tinggi effesiensi penyerapan karbon konsentrasi aktivator 3,6 M dengan waktu pengontakan 80 menit sehingga effesiensi penyerapan Cu sebesar 42,892 %.

Utilization of Water Hyacinth as Organic Fertilizer on Kemaro Island, Palembang City

The water hyacinth is a free-floating aquatic plant. Water hyacinth has massive reproductive capacity, which causes several problems, including ecosystem destruction, irrigation problems, and its use as a breeding ground for mosquitoes, which causes the mosquito population to increase. The high growth rate of water hyacinth is also a major problem faced by the people on Kemaro Island. The large number of water hyacinth plants on Kemaro Island causes environmental issues, such as slum settlements. Pupuk Sriwidjaja Palembang (Pusri) Ltd. is here to overcome this problem through a community empowerment program, namely the Sehat Sejahtera Program (Sesera). The methods used in this research are literature study, observation, and interviews. The research results show that the Sesera Program is able to reduce the number of water hyacinths that accumulate around the residences of Kemaro Island residents. Through the Sesera Program, Pusri empowers the community to utilize and process water hyacinth in order to reduce the number of water hyacinth growing around Kemaro Island. Activities carried out by utilizing water hyacinth to become compost. To maintain these impacts or benefits, the Sesera Program through water hyacinth composting activities needs to involve other stakeholders who are able to encourage and increase the impact of the program, such as the Village Government, City government, and agriculture service.