Characterization and utilization of coconut coir and bentonite-based adsorbents for removal of lead metal ion from hazardous liquid waste

Abstract: Research "of Activated Carbon Composite Materials from Rubber wood Sawdust and addition of Fe3O4 +PVDFNano-Magnetic for Liquid Waste Absorbent Materials based Heavy Metal". The study aims to measure the ability of activated carbon from rubber wood sawdust as an adsorbent of heavy metals such as Cu, Cd and Pb. This research was performed with colection and analizing data in the laboratory . The mixing process for carbon powder, nano-magnetic Fe3O4 and PVDF were use a ball-milling instrument for 2 hours. Samples were activated with KOH activating agent and followed by carbonization process at a temperature of 850 ° C. Results of the untreated samples for the liquid waste contain of Cu, Cd, and Pb with concentration of 15.2918 ppm, 5.5444 ppm and 84.9456 ppm, respectively. Once treated with rubber wood based activated carbon the maximum adsorption occurs in time immersion for 2 hours. The maximum adsorption concentration were as high as 7.8964 ppm (48.36%), 5.0067 ppm (9.69%) and 23.6320 ppm (72.17%) for Cu, Cd and Pb, respectively. The next absorption process were followed by combination of activated carbon and nano-magnetic Fe3O4, the result were 0.2592 ppm (98.30%), 4.5189 ppm (18.49%) and 1.1635 ppm (98.63%) for Cu, Cd and Pb. The maximum adsorption concentration after treated with a mixture of carbon powder and nano-magnetic Fe3O4 plus PVDF, for Cu was 0.2843 ppm (98.14%), Cd was 4.6650 ppm (15.86%) and Pb at 0.7574 ppm ( 99.10%). As a conclution can be found the increasing for the heavy metal absorption for every step experiments, and composite activated carbon, nano magnetic Fe3O4 and PVDF was the best asbsorption material for heavy metal ion in the liquid waste.

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Removal of Cs-137 and Sr-90 from reactor actual liquid waste samples using a new synthesized bionanocomposite-based carboxymethylcellulose

Radiochimica Acta ◽

10.1515/ract-2018-3005 ◽

2019 ◽

Vol 107 (8) ◽

pp. 695-711

Author(s):

Amr M. Emara ◽

Fatma H. El-Sweify ◽

Shereen F. Abo-Zahra ◽

Ahmed I. Hashim ◽

Tharwat E. Siyam

Keyword(s):

Metal Ion ◽

Liquid Waste ◽

Absorbed Dose ◽

Ion Concentration ◽

Solution Ph ◽

Γ Radiation ◽

H Nmr ◽

Sem Micrograph ◽

Radiation Induced ◽

Grafting Copolymerization

Abstract A new biosorbent containing vinylsulphonic acid and 2-acryloamido-2-methyl-1-propanesulphonic acid in the presence of magnetic nanoparticles, iron (III) oxide, grafted to carboxymethylcellulose sodium salt P(VSA/AMPSO3H/MNPs)-g-CMC bionanocomposite material (BNC) has been synthesized by γ radiation induced grafting copolymerization technique. The effect of comonomer, crosslinker, CMC concentration and the absorbed dose (kGy) on the grafting efficiency and swelling degree was studied. The BNC has been successfully synthesized and the structure of the prepared BNC was confirmed by Fourier transform infrared (FTIR), thermal analysis (TGA and DTA), X-ray powder diffraction (XRD), high-resolution 1H NMR spectroscopy and scanning electron microscopy (SEM) micrograph. Batch studies relevant to adsorption of Cs-137 and Sr-90 from the reactor actual liquid waste samples by the BNC were performed as a function of contact time, solution pH, metal ion concentration, and temperature in simulation studies using the γ emitting isotopes Cs-134 and Sr-85 as representatives of Cs-137 and Sr-90, respectively. Those studies were used to find out the best conditions for isolation of Cs-137 and Sr-90 from reactor actual liquid waste. The isotherms and kinetics were analyzed using different models at 25 °C. The maximum capacity of BNC was found to be 297 and 330 mg g−1 for Cs(I) and Sr(II) metal ions, respectively.

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Carbonization of Lignin Extracted from Liquid Waste of Coconut Coir Delignification

Indonesian Journal of Chemistry ◽

10.22146/ijc.46484 ◽

2020 ◽

Vol 20 (4) ◽

pp. 842

Author(s):

Widiyastuti Widiyastuti ◽

Mahardika Fahrudin Rois ◽

Heru Setyawan ◽

Siti Machmudah ◽

Diky Anggoro

Keyword(s):

Pore Size ◽

Surface Area ◽

Liquid Waste ◽

Nitrogen Adsorption ◽

Nitrogen Atmosphere ◽

Precipitation Method ◽

X Ray Diffraction ◽

Coconut Coir ◽

Xrd Patterns ◽

Adsorption Desorption

Lignin as a by-product of the pulping process is less widely used for worth materials. In this study, the utilization of lignin by-product of the soda delignification process of coconut coir converted to the activated carbon by a simple precipitation method followed by the carbonization at various temperatures is presented. The by-product liquor of the soda delignification process having a pH of 13.4 was neutralized by dropping of hydrochloric acid solution to achieve the pH solution of 4 resulting in the lignin precipitation. The precipitated was washed, filtered, and dried. The dried lignin was then carbonized under a nitrogen atmosphere at various temperatures of 500, 700, and 900 °C. The dried lignin and carbonized samples were characterized using SEM, XRD, FTIR, and nitrogen adsorption-desorption analyzer, to examine their morphology, X-Ray diffraction pattern, chemical bonding interaction, and surface area-pore size distribution, respectively. The characterization results showed that the functional groups of lignin mostly disappeared gradually with the increase of temperature approached the graphite spectrum. The XRD patterns confirmed that the carbonized lignin particles were amorphous and assigned as graphitic. All samples had a pore size of 3–4 nm classified as mesoporous particles. This study has shown that the carbonization lignin at a temperature of 700 °C had the highest surface area (i.e. 642.5 m2/g) in which corresponds to the highest specific capacitance (i.e. 28.84 F/g).

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Isolasi dan Karakterisasi Protease Ekstraseluler dari Bakteri dalam Limbah Cair Tahu

Jurnal Natur Indonesia ◽

10.31258/jnat.10.2.83-88 ◽

2012 ◽

Vol 10 (2) ◽

pp. 83 ◽

Cited By ~ 1

Author(s):

Amin Fatoni ◽

Zusfahair Zusfahair ◽

Puji Lestari

Keyword(s):

Ammonium Sulphate ◽

Metal Ion ◽

Specific Activity ◽

Liquid Waste ◽

Industrial Process ◽

Inhibitory Effect ◽

Enzyme Characterization ◽

Waste Sample ◽

Ammonium Sulphate Precipitation ◽

Large Application

Protease has been used in large application industrial process such as detergent, leather, textil, softdrink, andmedicine. In order to find unique protease, many substances were explored as proteases of bacteria sources. Inthis study, tofu liquid waste was used as a source of bacteria producing proteases. Waste sample was growth inskim milk agar medium showing proteases activity, it was used to produce extracellular protease. The microbialcolonies were identified as Staphyllococcus sp. Protease was extracted with 5000 g centrifugation at 4 0C, andpurificated with ammonium sulphate precipitation continued with dialisis. Optimum production time, pH, metal ion,EDTA, specific activity, KM, and Vmaks were studied for enzyme characterization. Volume of crude enzyme was 300ml, with spesific activity of 3.55 U/mg. Protease obtained from 60% ammonium sulphate fraction had the highestspecific activity of 68.22 U/mg. Study on the protease characterization revealed that optimum temperature of thisenzyme was 400C. The optimum pH of the enzyme was found to be 8.0. The kinetic parameters K M dan Vmaks withcasein as substrate were 0.31% and 51.55 U/ml. Some inhibitory effect was observed in the presence of EDTA, Cu +2,Co+2, Zn+2, and enzyme activity was stimulated by Mg+2, indicating that this ion had a functional role in the molecularstructure of the enzyme.

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THE EFFECT OF VARIATIONS OF LEAD METAL SOLUTION PH VARIATIONS ON ADSORBENT FROM TIRTA MUSI WASTE MUD WASTE PALEMBANG

Jurnal Tekno ◽

10.33557/jtekno.v18i2.1453 ◽

2021 ◽

Vol 18 (2) ◽

pp. 62-70

Author(s):

Netty Herawati - ◽

Muhamad Rafiqy ◽

Kiagus Rahmad Roni ◽

Heni Juniar

Keyword(s):

Liquid Waste ◽

Chemical Compounds ◽

Absorption Capacity ◽

Solid Metal ◽

Solution Ph ◽

Toxic Heavy Metal ◽

Surrounding Environment ◽

Metal Waste ◽

Lead Metal ◽

Ph Variations

Industrial waste can cause environmental pollution, one of which is solid metal waste. Lead is a dangerous and toxic heavy metal that can cause damage to the surrounding environment. Liquid waste containing mercury in industry contains a mixture of chemical compounds that other This causes the pH of the solution in the waste to vary. Lead metal waste needs to be treated with method one of which is the absorption of waste using an adsorbent. To enlarge the pores, the adsorbent will be activated using a 2 M KOH solution with the selected adsorbent, namely the sewage sludge of PDAM Tirta Musi Palembang which contains PAC (Poly Aluminum Chloride) which can help optimize absorption. The level of metal degradation was analyzed using AAS with absorption parameters obtained 4 with an absorption capacity of 23 ,22 mg/g.

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