The Role of Powder Sub-bituminous Coal with Sodium Hydroxide (NaOH) to Improve Chemical Properties of Ultisols

Abstract

This research was conducted in soil chemical laboratory, Faculty of Agriculture, Andalas University, Indonesia from December 2016 until May 2017. The purpose of this research is to determine the level of activeness of powder of Sub-bituminous coal with Sodium Hydroxide (NaOH) and to determine the appropriate dosage of the mixture in improving the chemical properties of Ultisols. This research was conducted in 2 stages: first stage study with 10 treatments (1% to 10% (w/w) NaOH) and the second stage study on soil using 15 treatment combinations (3 doses of powder Sub-bituminous coal with 5 doses of NaOH). The results of the first stage of research are the addition of NaOH in Sub-bituminous could increase the activity of powder Sub-bituminous coal with parameters of pH, CEC, and increases the number of O-H, C=O, and CH 3 groups. The results of stage II study is the provision of a mixture of 20 ton.ha -1 of Sub-bituminous coal powder and 10% of NaOH were able to increases the pH of H 2 O, CEC, organic-C, Available-P, and Total-N Ultisol each of 1.49 units, 28.08 me.100g -1 , 1.63 % C, 2.37 ppm P, 0.06% N, and decreases Al-exch Ultisol by 1.17 me.100g -1 and , SAR Ultisol by 0.03, and ESP Ultisols by 0.82 % compared to natural soil.

Influence of coal treatments on the Ni loading mechanism of Ni-loaded lignite char catalysts

“…These occurrences of the new bands might be due to the alkali solution, which could donate hydroxide ions to coal. 35 In Table 6 , the (COO − ) values of NaMM coal slightly increased from 188 cm −1 to 195 cm −1 , which indicated that NaOH treatment could hardly remove the metal ions from metal-carboxylate in coal.…”

“…The NaOH solution could have affected the increase in the number of oxygen-containing functional groups in MM coal such as –OH groups, which were sites for ion exchange. According to Herviyanti et al , 35 NaOH treatment could increase the concentration of –OH groups in sub-bituminous coal since NaOH is an alkaline compound that could donate OH − ions to sub-bituminous coal, which increased the cation exchange capacity of the coal. In the coal treatment with acetic acid, the Ni contents in Ni/AceMMchar and Ni/NaAceMMchar were 17.01 ± 0.19 wt% and 17.32 ± 0.23 wt%, respectively.…”

Correlation of Hg-N on ex-gold mining soil ameliorated with Sub-Bituminous coal and activation of Sub-Bituminous coal–NaOH

“…The chemical characteristics of SC can be improved by activating it with 10% NaOH, such as pH IOP Publishing doi:10.1088/1755-1315/1208/1/012049 3 (5.34-12.65) and CEC [24.39-148.20 cmol(+)kg -1 ]. There is an increase in the number of functional groups O-H, C=O, and CH 3 and can also increase the chemical properties of Ultisol soils such as pH H 2 O, CEC, organic C, available P, and total N respectively 1.49 units, 28.08 cmol(+)kg -1 , 1.63% C, 2.37 ppm P, 0.06% N, and reduced exch-Al by 1.17 cmol(+)kg -1 and sodium adsorption ratio (SAR) by 0.03% and exchangeable sodium percentage (ESP) of 0.82%, compared to control [17]. The objective of this study was to examine the interaction of N dan Hg in ex-gold mining soil ameliorated with sub-bituminous coal and the activation of sub-bituminous coal with 10% NaOH.…”

Study of surface charge and chemical properties of ex-gold mining soil ameliorated with Indonesian sub-bituminous coal

“…According to [26] O-H vibrations occur in two ways, namely structural OH and H 2 O. The mineral identification findings revealed the presence of graphite minerals as a contributor to the OH group in the former gold mine soil that had been repaired with SC.…”