PHOSPHORUS SORPTION KINETIC ON ACID UPLAND SMECTITIC SOIL AMENDED WITH CALCIUM CARBONATE AND CALCIUM SILICATE

Acid upland smectitic soil is identified by high amount of exchangeable Al due to the weathering of aluminum (Al) octahedral layer by H+ saturation and by very low phosphorus (P) status. Calcium carbonate (CaCO3) and calcium silicate (CaSiO3) were commonly used to decrease exchangeable Al and increase soil pH. Laboratory experiments were conducted with clayey smectitic Typic Paleudults from Gajrug region, West Java. The CaCO3 and CaSiO3 were added at rates to replace 0, 1.5 or 3 times of exchangeable Al. After one month of incubation, P sorption kinetic experiments were conducted. The changes in some chemical properties after one month incubation showed that both CaCO3 and CaSiO3 increased the soil pH, exchangeable Ca, and base saturation but did not increase the cation exchange capacity. The results of the experiment showed that both CaCO3 and CaSiO3 decreased the rate constant value of first order kinetic equation (k) and the P sorbed maximum (a) at given amount of added P compared to Control.The CaCO3 was better than CaSiO3 in decreasing k values and on the contrary for a values. The decrease in P maximum sorption and the rate constant of the soil amended with CaSiO3 and CaCO3 due to occupation of P sorption sites by silicates and hydroxyl ions. The CaCO3with the rate to replace 1.5 x exchangeable Al was recommended to decrease the rate constant of P sorption. However, the CaSiO3 at the rate to replace 3 x exchangeable Al was recommended to decrease the maximum P sorption.

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The Effect of Calcium Silicate on The Phosphorus Sorption Characteristics of Andisols Lembang West Java

Jurnal Ilmu Tanah dan Lingkungan ◽

10.29244/jitl.10.1.14-19 ◽

2008 ◽

Vol 10 (1) ◽

pp. 14-19 ◽

Cited By ~ 2

Author(s):

Arief Hartono

Keyword(s):

Calcium Silicate ◽

Dry Weight ◽

Phosphorus Sorption ◽

Sorption Kinetic ◽

Sorption Data ◽

Kinetic Experiment ◽

P Sorption ◽

Randomized Design ◽

Set Up ◽

Sorption Characteristics

The effect of calcium silicate CaSiOJ the phosphorus (P) sorption characteristics were studied in Andisols Lembang.The amount of 0, 2.5 and 5% CaSiOJ (calcium silicate) or 0, 7.5 and 15 g calcium silicate per pot was added to the 300 g(oven-dry weight) soil and incubated for one month. A completely randomized design in double replication was set up. After one month incubation, P sorption and P sorption kinetic experiments were conducted The results of P sorption experiment showed that P sorption data were satisfactorily described by the Langmuir equation. which was used to determine P sorption maxima, bonding energies and P sorbed at 0.2 mg P £"' (standard P requirement). The application of calcium silicate did not affect significantly P sorption maxima but decreased significantly the P bonding energies. Calcium silicate also decreased significantly the standard P requirements. As for P sorption kinetic experiment. the results showed that application of 5% calcium silicate decreased significantly the rate constant of P sorption and P sorbed maximum at given amount of added P. The results suggested that the application of calcium silicate to the Andisols made added P was more available for plant.

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Influence of soil pH on inorganic phosphorus sorption and desorption in a humid brazilian Ultisol

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832005000500004 ◽

2005 ◽

Vol 29 (5) ◽

pp. 685-694 ◽

Cited By ~ 38

Author(s):

Shinjiro Sato ◽

Nicholas Brian Comerford

Keyword(s):

Soil Ph ◽

Ph Value ◽

Tropical Soils ◽

Inorganic Phosphorus ◽

Phosphorus Sorption ◽

Tropical Regions ◽

P Sorption ◽

Phosphorus Desorption ◽

P Desorption ◽

P Bioavailability

Liming is a common practice to raise soil pH and increase phosphorus (P) bioavailability in tropical regions. However, reports on the effect of liming on P sorption and bioavailability are controversial. The process of phosphorus desorption is more important than P sorption for defining P bioavailability. However few studies on the relationship between soil pH and P desorption are available, and even fewer in the tropical soils. The effects of soil pH on P sorption and desorption in an Ultisol from Bahia, Brazil, were investigated in this study. Phosphorus sorption decreased by up to 21 and 34 % with pH increases from 4.7 to 5.9 and 7.0, respectively. Decreasing Langmuir K parameter and decreasing partition coefficients (Kd) with increasing pH supported this trend. Phosphorus desorption was positively affected by increased soil pH by both the total amount of P desorbed and the ratio of desorbed P to initially sorbed P. A decreased K parameter and increased Kd value, particularly at the highest pH value and highest P-addition level, endorsed this phenomenon. Liming the soil had the double effect of reducing P sorption (up to 4.5 kg ha-1 of remaining P in solution) and enhancing P desorption (up to 2.7 kg ha-1 of additionally released P into solution).

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Alleviating aluminum toxicity in an acid sulfate soil from Peninsular Malaysia by calcium silicate application

Solid Earth ◽

10.5194/se-7-367-2016 ◽

2016 ◽

Vol 7 (2) ◽

pp. 367-374 ◽

Cited By ~ 10

Author(s):

A. A. Elisa ◽

S. Ninomiya ◽

J. Shamshuddin ◽

I. Roslan

Keyword(s):

Soil Ph ◽

Calcium Silicate ◽

Soil Acidity ◽

Aluminum Toxicity ◽

Peninsular Malaysia ◽

Population Increase ◽

Acid Sulfate ◽

Exchangeable Ca ◽

Exchangeable Al ◽

Ameliorative Effect

Abstract. In response to human population increase, the utilization of acid sulfate soils for rice cultivation is one option for increasing production. The main problems associated with such soils are their low pH values and their associated high content of exchangeable Al, which could be detrimental to crop growth. The application of soil amendments is one approach for mitigating this problem, and calcium silicate is an alternative soil amendment that could be used. Therefore, the main objective of this study was to ameliorate soil acidity in rice-cropped soil. The secondary objective was to study the effects of calcium silicate amendment on soil acidity, exchangeable Al, exchangeable Ca, and Si content. The soil was treated with 0, 1, 2, and 3 Mg ha−1 of calcium silicate under submerged conditions and the soil treatments were sampled every 30 days throughout an incubation period of 120 days. Application of calcium silicate induced a positive effect on soil pH and exchangeable Al; soil pH increased from 2.9 (initial) to 3.5, while exchangeable Al was reduced from 4.26 (initial) to 0.82 cmolc kg−1. Furthermore, the exchangeable Ca and Si contents increased from 1.68 (initial) to 4.94 cmolc kg−1 and from 21.21 (initial) to 81.71 mg kg−1, respectively. Therefore, it was noted that calcium silicate was effective at alleviating Al toxicity in acid sulfate, rice-cropped soil, yielding values below the critical level of 2 cmolc kg−1. In addition, application of calcium silicate showed an ameliorative effect as it increased soil pH and supplied substantial amounts of Ca and Si.

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Influence of biosolids on phosphorus sorption characteristics of a Vertisol in comparison with manures and fertilizer

Canadian Journal of Soil Science ◽

10.4141/cjss07009 ◽

2007 ◽

Vol 87 (5) ◽

pp. 511-521 ◽

Cited By ~ 1

Author(s):

Babasola Ajiboye ◽

Olalekan O Akinremi ◽

Geza J Racz ◽

Donald N Flaten

Keyword(s):

Sorption Isotherm ◽

Single Point ◽

Chemical Properties ◽

Similar Proportion ◽

Phosphorus Sorption ◽

P Sorption ◽

P Loss ◽

Degree Of P Saturation ◽

Labile P ◽

Sorption Characteristics

Regulation of manure application in Manitoba has raised the question of whether or not biosolids application should be regulated in the same way. This study examined the effects of biosolids (BIO) applications on P sorption characteristics of a Vertisol in comparison with dairy cattle (DAIRY) and hog (HOG) manures, and monoammonium phosphate (MAP) fertilizer using the classical sorption isotherm and single point sorption index. Pertinent chemical properties and degree of P saturation (DPS) were also determined. The sorption maximum (Smax) in the control was reduced from 655 mg kg-1, to a range of 536–655 mg kg-1 with BIO, 559–650 mg kg-1 with MAP, 402–568 mg kg-1 with DAIRY, and 350–587 mg kg-1 with HOG depending upon the rate of P added. The lower DPS in the soil amended with BIO suggests a lower risk of P loss with biosolids compared with manures. The higher P sorption capacity of biosolids-amended soils compared with soils amended with manures suggest that Ca added with BIO increased the number of P sorption sites by a similar proportion to the amount of P added. Key words: Biosolids, P sorption isotherm, degree of P saturation, labile P, non-labile P

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Column Study of Nitrate Downward Movement and Selected Soil Chemical Properties’ Changes in Mine Spoiled Soil as Influenced by Liquid Organic Fertilizer

10.31219/osf.io/9sngr ◽

2017 ◽

Author(s):

Zainal Muktamar ◽

Sari Hasibuan ◽

Dotti Suryati ◽

Nanik Setyowati

Keyword(s):

Soil Sample ◽

Soil Ph ◽

Organic Fertilizer ◽

Soil Column ◽

Chemical Properties ◽

Soil Chemical Properties ◽

Available P ◽

Downward Movement ◽

Exchangeable K ◽

Exchangeable Al

Open pit coal mining is common practice to extract coal from lithosphere. This system, however, will bring about soil degradation. Organic fertilization is an alternative to recover fertility of the degraded soil. The objectives of the experiment were to determine nitrate downward movement and change of selected chemical properties in the soil column and to compare the growth of lamtoro (Leucaena leucocephala) as affected by local based liquid organic fertilizer. Column experiment was conducted using mine spoiled soil from Taba Penanjung Sub-District, Central of Bengkulu District, Bengkulu, Indonesia located at approximately 364.5 m above sea level. The experimental design was Completely Randomized Design with 3 treatments consisting of control, 75 and 150 ppm of local based liquid organic fertilizer (LOF). The treatment was replicated 3 times. Soil column was prepared using PVC pipe with diameter of 12.5 cm and length of 40 cm. Soil sample was put into the column and compacted by knocking the base of the column until the soil height achieved 35 cm. Lamtoro was raised in the column for 11 weeks. At the end of experiment, lamtoro shoot was cut and the PVC column was cleaved horizontally and soil was pushed out from the column. Soil sample was, then, sliced into 6 fractions, representing depth of 0-5, 5-10, 10-15, 15-20, 20-25, and > 25 cm. Fresh soil sample from each depth was extracted by distillated water and analyzed for NO3- N. Remaining of soil samples was air-dried for 72 hours, grinded with 0.5 mm screen, and analyzed for available P, exchangeable K, soil pH and exchangeable Al. The experiment indicated that local based liquid fertilizer significantly increased soil NO3-N, available P, exchangeable K, soil pH and reduced exchangeable Al. Higher rates of LOF caused increase in selected soil chemical properties but exchangeable Al. However, NO3-N was potential to move downward to deeper depth of the soil profile. Change of exchangeable Al, soil pH and exchangeable K was observed until 20-25 m depth of soil profile, but change of available P was detected only to 10-15 cm depth. Better soil chemical properties were followed by enhancement of lamtoro growth.

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Alleviating aluminium toxicity on an acid sulphate soils in Peninsular Malaysia with application of calcium silicate

Solid Earth Discussions ◽

10.5194/sed-7-2903-2015 ◽

2015 ◽

Vol 7 (4) ◽

pp. 2903-2926

Author(s):

A. A. Elisa ◽

S. Ninomiya ◽

J. Shamshuddin ◽

I. Roslan

Keyword(s):

Soil Ph ◽

Calcium Silicate ◽

Peninsular Malaysia ◽

Al Toxicity ◽

Acid Sulphate ◽

Rice Growth ◽

Acid Sulphate Soils ◽

Exchangeable Al ◽

Si Content ◽

Positive Effect

Abstract. A study was conducted to alleviate Al toxicity of an acid sulphate soils collected from paddy cultivation area in Kedah, Peninsular Malaysia. For this purpose, the collected acid sulphate soils were treated with calcium silicate. The treated soils were incubated for 120 days in submerged condition in a glasshouse. Subsamples were collected every 30 days throughout the incubation period. Soil pH and exchangeable Al showed positive effect; soil pH increased from 2.9 to 3.5, meanwhile exchangeable Al was reduced from 4.26 to 0.82 cmolc kg−1, which was well below the critical Al toxicity level for rice growth of 2 cmolc kg−1. It was noted that the dissolution of calcium silicate (CaSiO3) supplied substantial amount of Ca2+ and H4SiO42− ions into the soil, noted with increment in Si (silicate) content from 21.21 to 40 mg kg−1 at day 30 and reduction of exchangeable Al at day 90 from 4.26 to below 2 cmolc kg−1. During the first 60 days of incubation, Si content was positively correlated with soil pH, while the exchangeable Al was negatively correlated with Si content. It is believed that the silicate anions released by calcium silicate were active in neutralizing H+ ions that governs the high acidity (pH 2.90) of the acid sulphate soils. This scenario shows positive effect of calcium silicate to reduce soil acidity, therefore creates a favourable soil condition for good rice growth during its vegetative phase (30 days). Thus, application of calcium silicate to alleviate Al toxicity of acid sulphate soils for rice cultivation is a good soil amendment.

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The use of Ca-modified, brown-coal-derived humates and fulvates for treatment of soil acidity

Soil Research ◽

10.1071/sr01032 ◽

2002 ◽

Vol 40 (7) ◽

pp. 1171 ◽

Cited By ~ 5

Author(s):

Damayanthi Peiris ◽

Antonio F. Patti ◽

W. Roy Jackson ◽

Marc Marshall ◽

Christopher J. Smith

Keyword(s):

Brown Coal ◽

Soil Ph ◽

Soil Acidity ◽

Soil Column ◽

Chemical Properties ◽

Soil Surface ◽

Al Content ◽

Exchangeable Ca ◽

Exchangeable Al ◽

Over The Top

Previous workers have demonstrated the amelioration of soil acidity with Ca-saturated, at least slightly soluble, organic materials. This study investigated the effectiveness of a new source of such materials, the humate- or fulvate-rich products of oxidation (hydrogen peroxide) of Loy Yang brown coal. The products were characterised by physical and spectroscopic measurements and by elemental analysis. Two products, one approximately half fulvate (fulvate-rich), the other predominantly humate (humate-rich) were mixed with CaCl2 and then used to treat columns of an acid red podzol soil from Book Book, NSW. Leachate fractions were collected and analysed for pH, ionic strength, and concentration of Ca, Mg, K, Mn, Fe, and Al. After leaching (3 pore volumes), each soil column was sectioned and exchangeable Ca and Al contents were determined. The results were compared with those obtained from lime-treated and untreated columns.The Ca-fulvate-rich product was the most effective in lowering the exchangeable Al content of the soil whilst increasing exchangeable Ca and soil pH. About 90% of the reduction in exchangeable Al was due to loss of Al in the leachate rather than immobilisation. The pH increased over the top 15 cm of the column from 3.8 ± 0.1 to 4.5–5.4. The Ca-humate-rich oxidised product was less effective in ameliorating soil acidity, as expected from its chemical properties, but it increased soil pH (to 4.0–4.7) and exchangeable Ca in the top 6 cm of the column and decreased exchangeable Al in the top 12 cm. More of the reduction in exchangeable Al than for the treatment with Ca-fulvate-rich material was due to conversion to an immobile form. This material was superior to lime, which only gave significant improvement near the soil surface. The leachates from treated columns contained the same amounts of Mg, Mn, and K as a control, but more Fe was leached from treated columns, particularly that treated with the Ca-fulvate-rich product.

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Açaí Biochar and Compost Affect the Phosphorus Sorption, Nutrient Availability, and Growth of Dioclea apurensis in Iron Mining Soil

Minerals ◽

10.3390/min11070674 ◽

2021 ◽

Vol 11 (7) ◽

pp. 674

Author(s):

Sílvio Junio Ramos ◽

Duane Azevedo Pinto ◽

Rafael Silva Guedes ◽

Yan Nunes Dias ◽

Cecílio Fróis Caldeira ◽

...

Keyword(s):

Nutrient Availability ◽

Chemical Properties ◽

Phosphorus Sorption ◽

Native Plant ◽

P Sorption ◽

Mining Soil ◽

Affected Plant ◽

Iron Mining ◽

Sorption Mechanisms ◽

Organic Compost

Organic materials, such as biochar and organic compost, can reduce P sorption mechanisms and improve soil fertility, benefiting the reclamation of areas impacted by mining. This study evaluated how the chemical properties of Fe mining soil, the adsorption of P onto this substrate, and the growth of the native plant Dioclea apurensis, were affected by the application of açaí biochar (BC), organic compost (OC), and different P doses. Substrate collected from mining soil piles was incubated for 30 days with BC or OC. Each mining substrate with or without the addition of BC or OC received five doses of P (0, 40, 80, 120, and 240 mg∙kg−1 P). The addition of BC or OC promoted an increase in pH and nutrient availability (P, K, Ca, and B) in Fe mining soil. However, plants grown in the unamended mining soil (W) showed higher growth. The maximum P adsorption capacity decreased as a function of the addition of BC. We conclude that the application of BC reduced P sorption, while the application of either OC or BC altered the chemical properties of the soil and caused contrasting effects on P dynamics in Fe mining soil, and these treatments also affected plant growth.

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Chitosan-based Magnetic Composites - Efficient Adsorbents for Removal of Pb(II) and Cu(II) from Aqueous Mono and Bicomponent Solutions

Revista de Chimie ◽

10.37358/rc.18.9.6527 ◽

2018 ◽

Vol 69 (9) ◽

pp. 2323-2330 ◽

Cited By ~ 1

Author(s):

Daniela C. Culita ◽

Claudia Maria Simonescu ◽

Rodica Elena Patescu ◽

Nicolae Stanica

Keyword(s):

Aqueous Solutions ◽

Metal Ions ◽

Chemical Properties ◽

Order Kinetic ◽

Mass Ratio ◽

Magnetic Adsorbent ◽

Magnetic Composites ◽

Initial Ph ◽

Order Kinetic Model ◽

Physical And Chemical

A series of three chitosan-based magnetic composites was prepared through a simple coprecipitation method. It was investigated the influence of mass ratio between chitosan and magnetite on the physical and chemical properties of the composites in order to establish the optimum conditions for obtaining a composite with good adsorption capacity for Pb(II) and Cu(II) from mono and bicomponent aqueous solutions. It was found that the microspheres prepared using mass ratio chitosan / magnetite 1.25/1, having a saturation magnetization of 15 emu g--1, are the best to be used as adsorbent for the metal ions. The influence of different parameters such as initial pH values, contact time, initial concentration of metal ions, on the adsorption of Pb(II) and Cu(II) onto the chitosan-based magnetic adsorbent was investigated in details. The adsorption process fits the pseudo-second-order kinetic model in both mono and bicomponent systems, and the maximum adsorption capacities calculated on the basis of the Langmuir model were 79.4 mg g--1 for Pb(II) and 48.5 mg g--1 for Cu(II) in monocomponent systems, while in bicomponent systems were 88.3 and 49.5 mg g--1, respectively. The results revealed that the as prepared chitosan-based magnetic adsorbent can be an effective and promising adsorbent for Pb(II) and Cu(II) from mono and bicomponent aqueous solutions.

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Physico-Chemical Investigation of Endodontic Sealers Exposed to Simulated Intracanal Heat Application: Hydraulic Calcium Silicate-Based Sealers

Materials ◽

10.3390/ma14040728 ◽

2021 ◽

Vol 14 (4) ◽

pp. 728

Author(s):

David Donnermeyer ◽

Magdalena Ibing ◽

Sebastian Bürklein ◽

Iris Weber ◽

Maximilian P. Reitze ◽

...

Keyword(s):

Heat Treatment ◽

Thermal Treatment ◽

Film Thickness ◽

Physical Properties ◽

Calcium Silicate ◽

Setting Time ◽

Chemical Properties ◽

Chemical Changes ◽

Time Flow ◽

Heat Application

The aim of this study was to gain information about the effect of thermal treatment of calcium silicate-based sealers. BioRoot RCS (BR), Total Fill BC Sealer (TFBC), and Total Fill BC Sealer HiFlow (TFHF) were exposed to thermal treatment at 37 °C, 47 °C, 57 °C, 67 °C, 77 °C, 87 °C and 97 °C for 30 s. Heat treatment at 97 °C was performed for 60 and 180 s to simulate inappropriate application of warm obturation techniques. Thereafter, specimens were cooled to 37 °C and physical properties (setting time/flow/film thickness according to ISO 6876) were evaluated. Chemical properties (Fourier-transform infrared spectroscopy) were assessed after incubation of the specimens in an incubator at 37 °C and 100% humidity for 8 weeks. Statistical analysis of physical properties was performed using the Kruskal-Wallis-Test (P = 0.05). The setting time, flow, and film thickness of TFBC and TFHF were not relevantly influenced by thermal treatment. Setting time of BR decreased slightly when temperature of heat application increased from 37 °C to 77 °C (P < 0.05). Further heat treatment of BR above 77 °C led to an immediate setting. FT-IR spectroscopy did not reveal any chemical changes for either sealers. Thermal treatment did not lead to any substantial chemical changes at all temperature levels, while physical properties of BR were compromised by heating. TFBC and TFHF can be considered suitable for warm obturation techniques.

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