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characteristics, e.g. dyeability, fastness etc. It   University, Rajshahi). Leaching of  Sodium
             is found that the dye up take by silk fibre was      Sulphide Roasted Ilmenite Sand. Bang. J. Sci.
             decreased    with   the   increase   of   dye        Ind. Res., 2007, 42(4), 367-376.
             concentration.  Similarly the absorption of dye
             was increased with  the decrease of dye              The possibilities of co-leachings of Ti(IV) and
             concentration. The maximum dye absorption            Fe(IIl) from the.roasted product of ilmenite
             has been observed at 0.9 % dye with 10  %            sand with sodium sulphide at the optimum
             alum for the period of 65  minutes  at               conditions by hydrochloric and sulphuric  acid
             temperature 80° C and pH 4. At this optimum          were investigated. The leaching was dependent
             condition the dye absorption was 93  %.  The         on    hydrochloric    and    sulphuric   acid
             effects of sunlight in air on silk fibre have been   concentrations, temperature and leaching time.
             studied to investigate the colourfastness.  The      The  optimum  conditions for the best
             colourfastness of dyed  silk fibre of water and      dissolution of Ti(lV) and  Fe(III)  were:
             soap    solution    at   different   treatment       temperature 100° C, time 60 min for 1:1
             temperature was satisfactory.  Considering           ilmenite to sodium sulphide weight  ratio
             dyeability and colour-fastness, dye from henna       roasted product and 10 min for 1:2 ilmenite to
             matured  leaves  was highly applicable on            sodium sulphide  weight ratio roasted product,
             dyeing  of silk fibre as well as other protein       acid  concentration 4-6 N and agitation speed
             fibre.                                               400 rpm. About 95 % Ti(lV) and 93 % Fe(Ill)
                                                                  dissolutions were obtained  from  hydrochloric
             637  HALIM, M.A. & HOSSAIN, F. (Dept.                acid leaching and 95 % Ti(lV) and 91 %
             of Botany, Jahangirnagar University, Savar,          Fe(IlI) were obtained from sulphuric acid
             Dhaka). Biodegradation of textile dyes               leaching at a solid to liquid phase ratio (S/L) of
                                                                             -3
             employing Fomes lignosus. Bang. J. Life Sci.,        0.10 kg dm .
             2006, 18(2), 17-24.
                                                                  639 JAHAN,        I.A.;    ISLAM,      M.N.;
             Fomes lignosus  is a white-rot basidiomycete         HOSAIN, M.A.; (Fibre and Polymer Division,
             fungus which has a lignolytic activity.              BCSIR Laboratoties, Dhaka); SULTANA, F.
             Ligninolytic enzyme system of white-rot fungi        & ABEDIN, J.          (Dept. of Chemical
             plays an important role  in  decolourization of      Technology and Polymer  Science, Shahjalal
             different  dyes which are extensively used in        University of Science and Technology,
             textile and dye-based industries. In order to        Sylhet). Studies on Indigenous Cotton  linters
             investigate the degradation  of synthetic dyes,      for Preparation of Carboxymethyl Cellulose.
             five different dyes (Basilon yellow, Basilon         Bang. J. Sci. Ind. Res., 2007, 42(1), 29-36.
             turquoise, Vat blue, Vat  orange  and Vat red)
             were tested in both solid and liquid culture         Studies were carried out to find out a suitable
             media. In solid media, F. lignosus showed the        method  for preparation of carboxymethyl
             dye decolourization activity wihtin 6 to 10          cellulose (CMC) from indigenous cotton
             days      of     incubation.    From       the       linters. Special emphasis was given on
             spectrophotometric analysis of liquid cultures       purification method to remove most of  the
             of dyes also proved that  F. lignosus has  a         non-cellulosic   materials.    A     two-step
             highly decolourizing capability. The spectra of      purification  method  of cotton linters for
             control and treated culture media for each dye       preparation of water  soluble  car-boxymethyl
             were found to differ greatly. These results can      cellulose (CMC) with degree of substitution
             be basis for  using  F. lignosus for biological      (DS)  0.89  and  viscosity 235 cp (0.5 %
             degradation  of synthetic dyes in the treatment      solution) have been described.
             of effluents released from dye based industries.
                                                                  640 JAHAN, M.S. (Pulp and Paper Research
             638  HASAN, M.K.; BEGUM,  D.A.  &                    Division, BCSIR Laboratores, Dhaka); AL-
             ISLAM, M.F.  (Dept.  of Applied Chemistry            MARUF, A. & QUAIYYUM, M.A. (Dept. of
             and     Chemical     Technology,     Rajshahi        Applied Chemistry and Technology,  Dhaka



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