Decolorization of an Azo Dye Bismark Browny by Wood Plant—Pterocarya Stenoptera

Abstract

Total colorant production in China is estimated to be above 420,000 tons per annum, which account for 42% of the total World colorant production. This situation made serious synthetic dyes pollution on both water bodies and soil. We investigated the removal ability and physiological response of Pterocarya stenoptera to simulated wastewater containing Bismark browny. The percent decolorization of Bismark browny by Pterocarya stenoptera to 100 mg/L, 400 mg/L, 800mg/L and in average was 97.80%, 88.88%, 85.37% and 90.69 respectively in 6 days. The values for the apparent TSCF of Pterocarya stenoptera for t Bismark browny was 1.62. The NRT of Pterocarya stenopter growing in 100 mg/L Bismark browny dye increased during first 2 days ,then it decreased less than 14% that of controls. At a concentration of 400 and 800 mg/L, Bismark browny decreased transpiration of Pterocarya stenopter more than 70% after 6 days. The result showed that Pterocarya stenoptea can resist 100mg/L Bismark browny. It is concluded that Pterocarya stenoptea can be used to phytoremediation of wastewater containing azo dyes.