Physical and Chemical Properties of Rice Husk Ash Concrete Under Seawater

2018 ◽  
Vol 10 (4) ◽  
Author(s):  
Ramadhansyah Putra Jaya ◽  
◽  
Mohd Rosli Hainin ◽  
Mohd Haziman Wan Ibrahim ◽  
Fadzli Mohamed Nazri ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Physical and chemical properties of cement with nano black rice husk ash

2019 ◽  
Author(s):  
Ramadhansyah Putra Jaya ◽  
Mohd Ibrahim Mohd Yusak ◽  
Mohd Rosli Hainin ◽  
Nordiana Mashros ◽  
Muhammad Naqiuddin Mohd Warid ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Black Rice ◽  
Physical And Chemical ◽  
And Chemical Properties

scholarly journals Production of lettuce seedlings in substrates with tung compost, carbonized rice husk and earthworm humus

2017 ◽  
Vol 35 (2) ◽  
pp. 174-179 ◽  
Author(s):  
Maristela Watthier ◽  
Magnólia AS Silva ◽  
José E Schwengber ◽  
Maria H Fermino ◽  
Tiago V Custódio
Keyword(s):  
Rice Husk ◽  
Chemical Properties ◽  
Total Porosity ◽  
Nutrient Content ◽  
Dry Density ◽  
Physical And Chemical Properties ◽  
Randomized Design ◽  
Shoot Mass ◽  
Physical And Chemical ◽  
And Chemical Properties

ABSTRACT Different properties of substrates based on tung compost (TC), carbonized rice husk (CRH) and earthworm humus (H) were analyzed, besides the effect of the formulations on the production of lettuce seedlings, cv. Veneranda. The experiment was carried out in Pelotas, Rio Grande do Sul State, Brazil, from December 2012 to February 2013, in a greenhouse, using completely randomized design with seven treatments and three replications. The used substrates were formulated on a volume basis: T1= commercial substrate S10® (control); T2= 90% carbonized rice husk (CRH) + 10% humus (H); T3= 75% CRH + 15% tung compost (TC) + 10% H; T4= 55% CRH + 35% TC + 10% H; T5= 35% CRH + 55% TC + 10% H; T6= 15% CRH + 75% TC + 10% H; T7= 90% TC + 10% H. Seedlings were produced in polystyrene trays with 200 cells, being evaluated 35 days after sowing. The substrate with larger proportion of CRH (T2 with 90% CRH) showed suitable dry density (DD) and total porosity (TP), high pH and aeration space (AS), low easily available water (EAW), electric conductivity (EC), and nutrient content, constituting an inert substrate, not being indicated as substrate due to the lower development of the seedlings. Using 15% TC, an increase was noticed in DD, AEW, EC and nutrients and, a decrease in TP, AS and pH due to, mainly, the size of tung compost particles, which accommodated themselves and altered physical and chemical properties of the substrates. Substrates with 90% and 75% TC (T7 and T6) provided the greatest shoot length, fresh and dry shoot mass and leaf area for lettuce seedlings due to higher nutrient content, also considering physical and chemical properties of these substrates. Pure CRH is not indicated to be used as substrate, but mixed with tung compost (T6), it provides high quality seedlings. Tung compost was effective in producing lettuce seedlings, since the composting is able to eliminate phytotoxic substances from this material which can hinder the seedling growth.

scholarly journals Characterization of Biochars Derived from Different Organic Wastes

2020 ◽  
pp. 44-50
Author(s):  
Md. Shahin Hossin ◽  
Morsheda Akter Mukta ◽  
Md. Abdur Rouf Talukder ◽  
Md. Mustafizur Rahman ◽  
Md. Sagirul Islam Majumder ◽  
...  
Keyword(s):  
Rice Straw ◽  
Rice Husk ◽  
Soil Amendment ◽  
Chemical Properties ◽  
Organic Wastes ◽  
Physical And Chemical Properties ◽  
Saw Dust ◽  
Rice Straw Biochar ◽  
Physical And Chemical ◽  
And Chemical Properties

Biochar is widely recognized as an efficient tool for soil fertility and carbon sequestration. The understanding of its physical and chemical properties is strongly related to the type of used material, is crucial to identify the most suitable application of biochar in soil. A selection of organic wastes (e.g., rice straw, rice husk and saw dust) with different characteristics were pyrolyzed at 350 0C in order to optimize the physical and chemical properties of biochar as a soil amendment. Bulk density of biochar samples in this study varied from 0.18 mg/m3 to 0.22 mg/m3. Moisture content was in the order of saw dust (8.41%) > rice straw (7.21%) > rice husk (6.74%). Rice straw biochar had highest pH (8.80) and electrical conductivity, EC (3.45 ds/m). The organic carbon was highest in rice straw biochar (46.50%) followed by with rice husk (39.3%) and saw dust (25.3%). The total nitrogen contents of the rice straw, rice husk and saw dust were 1.78%, 1.59% and 1.11%, respectively. The rice straw biochar contents higher available P, as compared to rice husk and saw dust biochar. The rice straw biochar had higher exchangeable Ca (5.60 meq/100 g), Mg (1.70 meq/100 g). This study suggested that the rice straw biochar has a great potential as soil amendment among the three biochars for sustainable soil management.

scholarly journals Rice Husk Activated Carbon with NaOH Activation: Physical and Chemical Properties

2020 ◽  
Vol 49 (09) ◽  
pp. 2261-2267
Author(s):  
Mohamad Jani Saad ◽  
Chin Hua Chia ◽  
Suffian Misran ◽  
Sarani Zakaria ◽  
Mohd Saiful Sajab ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Rice Husk ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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