scholarly journals Adsorpsi Pb2+ dan Cu2+ Menggunakan Kitosan-Silika dari Abu Sekam Padi

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Ani Mulyasuryani ◽  
Barlah Rumhayati ◽  
Chandrawati Cahyani ◽  
Soebiantoro Soebiantoro
Keyword(s):  
Cation Exchange ◽  
Rice Husk ◽  
Cation Exchange Capacity ◽  
Rice Husk Ash ◽  
High Capacity ◽  
Exchange Capacity

Abstrak Silika dari abu sekam padi yang dimodifikasi dengan kitosan menghasilkan suatu adsorben yang dapat meningkatkan daya adsorpsi terhadap ion logam. Adsorben kitisan – silika dari abu sekam padi dibuat dengan komposisi 100, 95, 85, 75 dan 65 %  silika dalam kitosan. Hasil penelitian menunjukkan bahwa peningkatan jumlah kitosan dapat meningkatkan nilai kapasitas tukar kation (KTK) adsorben. Adsorben terbaik dihasilkan pada % silika 65% dengan KTK 0,45 mekiv H+/g adsorben. Adsorbent tersebut mempunyai daya adsorpsi terhadap Pb2+ sebesar 11,8 mg/g adsorben dan 0,3 mg/g adsorben terhadap Cu2+.   Kata kunci : adsorpsi, abu sekam padi, kapasitas tukar kation, kitosan   Abstract Modification of silica from rice husk ash with chitosan resulted a high capacity adsorbant. The composition of silica from rice husk ash in adsorbent are 100, 95, 85, 75, and 65% in chitosan. The result of researsh show that the chitosan increasing cation exchange capasity (CEC) of adsorbent. The best adsorbent is 65% silica with CEC 0,45 mekiv H+/g adsorbent. The adsorbent has ability to adsorb Pb2+ is 11,8 mg/g adsorben and 0,3 mg/g adsorben to Cu2+.   Keywords : adsorption, rice ash husk, cation exchange capacity, chitosan

scholarly journals Synthesis of Zeolite from Bagasse and Rice Husk Ashes as Surfactant Builder on Detergency Process: Variation of NaOH Concentration for Silica Isolation

2018 ◽  
Vol 21 (3) ◽  
pp. 139-143
Author(s):  
Arnelli Arnelli ◽  
Bara Yunianto Fathoni ◽  
Teguh Iman Prastyo ◽  
Ahmad Suseno ◽  
Yayuk Astuti
Keyword(s):  
Cation Exchange ◽  
Sodium Silicate ◽  
Rice Husk ◽  
Cation Exchange Capacity ◽  
Rice Husk Ash ◽  
Sol Gel ◽  
Hydrothermal Process ◽  
Sodium Aluminate ◽  
Exchange Capacity ◽  
Mineral Type

Zeolite was successfully synthesised from ash bagasse and from rice husk ash as source of silica and applied to surfactant builder. The removal of silica from bagasse ash and from rice husk ash was influenced by NaOH concentration to obtain sodium silicate. This research aimed to synthesize zeolite, determine the optimum concentration of NaOH to synthetic zeolite, identify the zeolite mineral type, morphology, determine cation exchange rate and detergency by using synthesized zeolite as builder. Synthesis of zeolite was undertaken by sol-gel method followed by hydrothermal process. The stages of this study included the production of bagasse and rice husk ashes, isolation of silicate using a variation of NaOH concentration of 1.67, 3.33, 5.00, 6.67 and 8.30 M in the form of sodium silicate. Synthesis of zeolite was carried out by reacting sodium silicate and sodium aluminate using hydrothermal method. The synthesized zeolites were characterized using XRD and SEM. The results of this research indicated the types of zeolite minerals formed, namely, zeolite A, Na-A, Na-Y and sodalite. The morphology of the synthesized zeolites from both samples was quite homogeneous, NaOH concentration used to produce zeolite from bagasse ash was 1.67 M with value of cation exchange capacity (CEC) and detergency were respectively 121.14 mek/100 gram and 92.09% while synthesis zeolite from rice husk ash was generated using 8.3 M NaOH concentration with value of cation exchange capacity (CEC) and detergency were 65,71 mek / 100 gram and 94,313%, respectively.

Synthesis of Faujasite and Analcime Using of Rice Husk Ash and Metakaolin

2013 ◽  
Vol 770 ◽  
pp. 209-212 ◽  
Author(s):  
Naruemon Setthaya ◽  
Chitsophin Pindi ◽  
Prinya Chindaprasirt ◽  
Kedsarin Pimraksa
Keyword(s):  
Specific Surface ◽  
Cation Exchange ◽  
Surface Area ◽  
Specific Surface Area ◽  
Rice Husk ◽  
Cation Exchange Capacity ◽  
Rice Husk Ash ◽  
Raw Materials ◽  
Exchange Capacity ◽  
Molar Ratio

Faujasite and analcime were synthesized by two-step process via hydrothermal method using the rice husk ash and metakaolin as starting materials. In the first step, the raw materials were prepared using the SiO2/Al2O3molar ratio of 4 and pretreatment with NaOH solution under various stirring conditions. The suspension was subjected to hydrothermal treatment at various reacting time and temperature in second step. The mineralogy, morphology, specific surface area and cation exchange capacity of the synthesized products were investigated using X-ray diffraction, Scanning electron microscopy, N2adsorption and desorption isotherm and ammonium acetate method, respectively. Faujasite was obtained using low temperature and short-time synthesis, while the analcime was obtained at high temperature and long-time synthesis. The stirring time did not affect zeolite types but the specific surface area. The cation exchange capacity of the synthetic faujasite and analcime were 263-280 and 280-302 meq/100 g, respectively.

scholarly journals An In Vitro Evaluation of the Capacity of Local Tanzanian Crude Clay and Ash-Based Materials in Binding Aflatoxins in Solution

Toxins ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 510 ◽  
Author(s):  
Emmanuel Ayo ◽  
Athanasia Matemu ◽  
Germana Laswai ◽  
Martin Kimanya
Keyword(s):  
Cation Exchange ◽  
Adsorption Capacity ◽  
Cation Exchange Capacity ◽  
Volcanic Ash ◽  
Rice Husk Ash ◽  
Binding Capacity ◽  
Exchange Capacity ◽  
In Vitro Technique ◽  
Great Health

Aflatoxins in feeds cause great health hazards to animals, and thus eventually to humans as well. The potential of clays from Arusha (AC), Kilimanjaro (KC), the Coast (CC), and Morogoro (MC), as well as volcanic ash (VA) and rice husk ash (RA), were evaluated for their capacity to adsorb aflatoxins B1 (AFB1), B2 (AFB2), G1 (AFG1), and G2 (AFG2) relative to a commercial binder Mycobind® (R) using in vitro technique. On average, CC, VA, KC, MC, AC, RA, and R adsorbed 39.9%, 51.3%, 61.5%, 62.0%, 72.6%, 84.7%, and 98.1% of the total aflatoxins from solution, respectively. The capacity of AC and RA was statistically (p < 0.05) better in binding aflatoxins next to R. The adsorption capacity seemed to follow the trend of the cation exchange capacity (CEC) of these materials. The CEC (meq/100 g) of CC, MC, KC, VA, AC, RA, and R were 7.0, 15.4, 18.8, 25.4, 27.2, 27.2, and 38.9, respectively. On average 96.3%, 42.7%, 80.8%, and 32.1% of AFB1, AFB2, AFG1, and AFG2 were adsorbed, respectively. The binding capacity of the clays and ashes relative to Mycobind® was about 100% for AC and RA, 50% for KC, MC, and VA, and 33.3% for CC. The AC and RA seem to be promising resources in binding aflatoxins in solution.

scholarly journals Physicochemical Characterization of Biomass Residue–Derived Biochars in Vietnam

2018 ◽  
Author(s):  
Nguyen Van Hien ◽  
Eugenia Valsami-Jones ◽  
Nguyen Cong Vinh ◽  
Tong Thi Phu ◽  
Nguyen Thi Thanh Tam ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Rice Husk ◽  
Cation Exchange Capacity ◽  
Physicochemical Characterization ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Bet Surface Area ◽  
Sem Images ◽  
Surface Areas ◽  
Physico Chemical

This study compares the physico-chemical characteristics of three different types of biochar produced from biomass residues in Vietnam as a basis for optimising their application in water purification and soil fertilisation. &nbsp;Wood biochar (WBC), rice husk biochar (RBC), and bamboo biochar (BBC) were produced under limited oxygen conditions using equipment available locally in Vietnam, known as a Top-Lid Updraft Drum (TLUD). The resulting biochars were characterised using a suite of state-of-the-art methods to understand their morphology, surface chemistry and cation exchange capacity.&nbsp; Surface areas (measured by BET) for WBC and BBC were 479.34 m2/g and 434.53 m2/g, respectively, significantly higher than that of RBC which was only 3.29 m2/g.&nbsp; The morphology as shown in SEM images corresponds with the BET surface area, showing a smooth surface for RBC, a hollow surface for BBC, and a rough surface for WBC. &nbsp;All three biochars produced alkaline, with pH values around 10, and all have high carbon contents (47.95 - 82.1 %). &nbsp;Cation exchange capacity (CEC) was significantly different (p&lt;0.05) among the biochars, being 26.70 cmol/kg for RBC, 20.7 cmol/kg for BBC, and 13.53 cmol/kg for WBC, which relates to the cations (Ca, Mg, K) and functional groups with negative charge (carboxyl, hydroxyl) present on the biochar surfaces. &nbsp;The highest contents of Ca, Mg and K in rice husk BC may explain its highest CEC values. &nbsp;Thus, although the biochars were produced by the same method, the various feedstocks lead to quite different physico-chemical properties. &nbsp;Ongoing work is linking these physico-chemical properties to the biochar efficiencies in terms of nitrate and ammonia capture capacities for use as fertilisers, and for adsorption of heavy metals (Zn, Cu) or water filtration, in order to design optimal biochar properties for specific applications.

EVALUASI PERUBAHAN KUALITAS TANAH PADA LAHAN BEKAS PENAMBANGAN NIKEL DI PULAU GEBE

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Mardi Wibowo
Keyword(s):  
Organic Carbon ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Mining Activity ◽  
Evaluation Activity ◽  
Land Quality ◽  
Environment Quality

Since year 1977 until 2005, PT. ANTAM has been exploited nickel ore resources at Gebe Island – Center ofHalmahera District – North Maluku Province. Mining activity, beside give economically advantages also causedegradation of environment quality espicially land quality. Therefore, it need evaluation activity for change ofland quality at Gebe Island after mining activity.From chemical rehabilitation aspect, post mining land and rehabilitation land indacate very lack and lackfertility (base saturated 45,87 – 99,6%; cation exchange capacity 9,43 – 12,43%; Organic Carbon 1,12 –2,31%). From availability of nutrirnt element aspect, post mining land and rehabilitation land indicate verylack and lack fertility (nitrogen 0,1 – 1,19%). Base on that data, it can be concluded that land reclamationactivity not yet achieve standart condition of chemical land.Key words : land quality, post mining lan

scholarly journals Attributes of the soil fertilized with sewage sludge and calcium and magnesium silicate

2015 ◽  
Vol 19 (11) ◽  
pp. 1107-1113 ◽  
Author(s):  
Geraldo R. Zuba Junio ◽  
Regynaldo A. Sampaio ◽  
Altina L. Nascimento ◽  
Luiz A. Fernandes ◽  
Natália N. de Lima ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Ricinus Communis ◽  
Block Design ◽  
Magnesium Silicate ◽  
Exchange Capacity ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Randomized Block Design

ABSTRACTThis study aimed to evaluate the chemical attributes of an Inceptisol cultivated with castor bean (Ricinus communis L.), variety ‘BRS Energia’, fertilized with sewage sludge compost and calcium (Ca) and magnesium (Mg) silicate. The experiment was conducted at the ICA/UFMG, in a randomized block design, using a 2 x 4 factorial scheme with three replicates, and the treatments consisted of two doses of Ca-Mg silicate (0 and 1 t ha-1) and four doses of sewage sludge compost (0, 23.81, 47.62 and 71.43 t ha-1, on dry basis). Soil organic matter (OM), pH, sum of bases (SB), effective cation exchange capacity (CEC(t)), total cation exchange capacity (CEC(T)), base saturation (V%) and potential acidity (H + Al) were evaluated. There were no significant interactions between doses of sewage sludge compost and doses of Ca-Mg silicate on soil attributes, and no effect of silicate fertilization on these attributes. However, fertilization with sewage sludge compost promoted reduction in pH and increase in H + Al, OM and CEC. The dose of 71.43 t ha-1 of sewage sludge compost promoted the best soil chemical conditions.

scholarly journals Effect of Low Zeolite Doses on Plants and Soil Physicochemical Properties

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2617
Author(s):  
Alicja Szatanik-Kloc ◽  
Justyna Szerement ◽  
Agnieszka Adamczuk ◽  
Grzegorz Józefaciuk
Keyword(s):  
Plant Growth ◽  
Physicochemical Properties ◽  
Cation Exchange ◽  
Surface Area ◽  
Cation Exchange Capacity ◽  
N Fertilization ◽  
Exchange Capacity ◽  
First Year ◽  
Soil Physicochemical Properties ◽  
Water Holding

Thousands of tons of zeolitic materials are used yearly as soil conditioners and components of slow-release fertilizers. A positive influence of application of zeolites on plant growth has been frequently observed. Because zeolites have extremely large cation exchange capacity, surface area, porosity and water holding capacity, a paradigm has aroused that increasing plant growth is caused by a long-lasting improvement of soil physicochemical properties by zeolites. In the first year of our field experiment performed on a poor soil with zeolite rates from 1 to 8 t/ha and N fertilization, an increase in spring wheat yield was observed. Any effect on soil cation exchange capacity (CEC), surface area (S), pH-dependent surface charge (Qv), mesoporosity, water holding capacity and plant available water (PAW) was noted. This positive effect of zeolite on plants could be due to extra nutrients supplied by the mineral (primarily potassium—1 ton of the studied zeolite contained around 15 kg of exchangeable potassium). In the second year of the experiment (NPK treatment on previously zeolitized soil), the zeolite presence did not impact plant yield. No long-term effect of the zeolite on plants was observed in the third year after soil zeolitization, when, as in the first year, only N fertilization was applied. That there were no significant changes in the above-mentioned physicochemical properties of the field soil after the addition of zeolite was most likely due to high dilution of the mineral in the soil (8 t/ha zeolite is only ~0.35% of the soil mass in the root zone). To determine how much zeolite is needed to improve soil physicochemical properties, much higher zeolite rates than those applied in the field were studied in the laboratory. The latter studies showed that CEC and S increased proportionally to the zeolite percentage in the soil. The Qv of the zeolite was lower than that of the soil, so a decrease in soil variable charge was observed due to zeolite addition. Surprisingly, a slight increase in PAW, even at the largest zeolite dose (from 9.5% for the control soil to 13% for a mixture of 40 g zeolite and 100 g soil), was observed. It resulted from small alterations of the soil macrostructure: although the input of small zeolite pores was seen in pore size distributions, the larger pores responsible for the storage of PAW were almost not affected by the zeolite addition.

Sign in / Sign up

Export Citation Format

Share Document