Abstract
Cr(VI) and dye contents on batik wastewater has been reduced by biosorption using cheap, abundant, and easily obtained biosorbent such asSargassum cinereumandPleurotus ostreotusbaglog waste. Biosorbent in the tea bags can increase adsorption capacity because it has a large surface.This research aims to obtain the optimum of biosorbent ratio and particle size in the tea bag package to Cr(VI) adsorption and decolorization. This experimental research was conducted using Spilt Plot Design. The obtained data were analyzed using anova test on 5% significane level. Based on result study, the highest of Cr(VI) adsorption found at the biosorbent in the tea bag with ratio of 3:1 and particle size of 250-425 urn i.e. 0,0042 mgg-1with reduction efficiency was 68,31%. Percentage of decolorization was 39,92% found at biosorbent in the tea bag with ratio 0:1 and particle size of 425-675 urn. Biosorbent in the tea bag was effective to reducing Cr(VI) and dye in batik wastewater.
Highlights
Batik wastewater generated from washing, coloring and dyeing processes
Heavy metal and dye contents in batik wastewater can minimize by biosorption
The ratio of S. cinereum and baglog wastes consisted of five levels (1:0; 3:1; 1:1; 1:3 and 0:1) while the particle size of the biosorbent consisted of three levels (150-250; 250-425 and 425-675 μm)
Summary
Batik wastewater generated from washing, coloring and dyeing processes. It contains pollutant such as heavy metal and dyes. Batik wastewater may cause severe environment pollution. It is very common in Indonesia that the small-scale batik industries clustered in a certain area such as in Sokaraja Batik Center, Central Java, with their wastewaters, are directly discharged to the environment, i.e., Wangan River. Heavy metal and dye contents in batik wastewater can minimize by biosorption. Biosorption is adsorption using inactivated or dead organisms[2]. Biosorption is greatly effective to adsorb heavy metals and dyes in waste due to the relatively simple, cheap, high adsorption rate, and selective[4-6]
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