The responsible mechanism and performance of peat soil humin for the sorption of methylene blue (MB) and p-nitrophenol (p-NP) have been investigated. Humin was obtained from peat soil of Siantan, West Kalimantan, Indonesia, after removing the content of humic and fulvic acids into a NaOH solution using the recommended procedure of International Humic Substances Society (IHSS). The obtained humin was then purified by rigorous stirring in a mixed solution of HCl 0.1 M and HF 0.3 M. Ash content in humin after the purification abruptly decreased from 36.84 to 1.26 wt.% indicating that minerals and other inorganic impurities were mostly removed. Phenolic –OH and carboxyl (–COOH) functional groups contributing to the acidity of humin were in the level of 3.44 and 2.10 mmol/g, respectively. At optimum medium pH of 6.20 for MB and 7.00 for p-NP, –COO– as the deprotonated product of –COOH was the most responsible active site in sorbing MB and p-NP through electrostatic interaction and hydrogen bonding, respectively. The homogeneity of –COO– as the active site for the sorption of MB and p-NP implied that the surface of humin sorbent was energetically uniform and thereby the sorption of both MB and p-NP followed better the Langmuir than the Freundlich isotherm model with sorption capacity of 0.19 and 0.26 mmol/g and sorption energy of 32.92 and 27.27 kJ/mol, respectively.
This study was conducted in al-istiqamah ngatabaru modern islamic boarding school with sample of 50 students. Data were gathered through observation and questionnaires. The data were analysed using descriptive analysis approach. The results showed that the parenting style applied by each parents of students in general can be said to be quite democratic, but none of the parents of students who apply pure democratic parenting. Under certain circumstances, parents are authoritarian and in another circumstances parents are permissive. Based on the significant value of the Coefficients table, the significance value of 0,000 <0,05, then based on the known value of , while the Ttable value at the error level 5% = 2.011, thus the statement can be written that, tcount> (18.254 <2.011 ), the degree of the influence of single parent parenting style on social emotional behavior women student of al-istiqamah ngatabaru modern islamic boarding school also can be known through the magnitude of coefficient of determination (R Square) is 0.871 or 87.1%. This means that 12.9% is influenced by other factors not included in this study. so it can be concluded that single parent parenting style (X) parenting variable influential to emotional social development variable (Y), the result is significant hypothesis that there is positive influence between parenting parent single parent to emotional social development santriwati pondok pesantren modern Al-istiqamah Ngatabaru.
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