%A 1517011015 WINDI RATNASARI 
%T PENGARUH KONSENTRASI ZAT ANTI KOROSI OLIGOMER 4-VINIL 
PIRIDIN TERHADAP PERTUMBUHAN IRON OXYDIZING BACTERIA 
(IOB)
%X Korosi atau pengkaratan adalah peristiwa kerusakan atau penurunan kualitas suatu 
logam yang disebabkan oleh reaksi dengan lingkungannya. Korosi dapat dicegah 
dengan menggunakan inhibitor atau zat anti korosi. Penelitian ini bertujuan untuk 
mengetahui pengaruh konsentrasi zat anti korosi oligomer 4-vinil piridin terhadap 
pertumbuhan iron oxydizing bacteria (IOB), yang diduga efektif menghambat 
pertumbuhan mikroba pengoksidasi besi (Thiobacillus ferrooxidans). Tahap 
penelitian meliputi pembuatan kurva pertumbuhan dari bakteri Thiobacillus 
ferrooxidans dan penentuan nilai pH optimum dari pertumbuhan bakteri tersebut. 
Oligomer 4-vinil piridin yang berperan sebagai inhibitor korosi dilakukan sintesis 
hingga diperoleh hasil sintesis oligomer 4-vinil piridin. Selanjutnya Thiobacillus 
ferrooxidans dan hasil sintesis oligomer 4-vinil piridin dihitung nilai lethal 
concentration (LC50). Berdasarkan kurva pertumbuhan diperoleh waktu setengah 
dari fase eksponensial yaitu pada hari ke-7 dan nilai pH optimum diperoleh pada 
pH 2,5. Hasil sintesis oligomer 4-vinil piridin diperoleh cairan kental berwarna 
jingga. Nilai LC50 pada oligomer 4-vinil piridin diperoleh pada konsentrasi 0,14 
ppm. Berdasarkan hasil penelitian dapat disimpulkan bahwa senyawa oligomer 4-
vinil piridin mampu menghambat pertumbuhan bakteri Thiobacillus ferrooxidans. 
Kata kunci : Oligomer 4-Vinil Piridin, Iron Oxydizing Bacteria, Thiobacillus 
ferrooxidans, Lethal Concentration 50 (LC50). 

Corrosion or rusting is the process of damage or deterioration of the quality of a 
metal caused by reaction with its environment. Corrosion can be prevented by 
using inhibitors or anti corrosion substances. This study aims to determine the 
effect of the concentration of anti-corrosion resistant substance 4-vinyl pyridine 
oligomeric against the growth of iron oxydizing bacteria (IOB), which is 
suspected to effectively inhibit microbial growth of iron oxidization (Thiobacillus 
ferrooxidans). The research phase includes the creation of growth curves from 
Thiobacillus ferrooxidans bacteria and the optimum pH value determination of the 
bacteria growth. 4-vinyl pyridine oligomeric which acts as a corrosion inhibitor 
carried out synthesis until obtained by the synthesis of 4-vinyl pyridine 
oligomeric. Furthermore, Thiobacillus ferrooxidans and the synthesis results of 4-
vinyl pyridine oligomeric computed value of lethal concentration (LC50). Based 
on the growth curve obtained half time from the exponential phase is on the 7th 
day and the optimum pH value is obtained at pH 2.5. Results of the synthesis of 
4-vinyl pyridine oligomers is obtained orange coloured viscous fluid. The LC50
value in 4-vinyl pyridine oligomers is obtained at a concentration of 0.14 ppm. 
Based on the results of the study can be concluded that the 4-vinyl pyridine 
oligomeric compounds are able to inhibit the growth of Thiobacillus ferrooxidans 
bacteria. 
Keywords: 4-Vinyl Pyridine Oligomeric, Iron Oxydizing Bacteria, Thiobacillus 
ferrooxidans, Lethal Concentration 50 (LC50)
%C UNIVERSITAS LAMPUNG
%D 2019
%I Fakultas Matematika dan Ilmu Pengetahuan Alam
%L eprints57179