Treatment of Textile Wastewater Using Biochar Produced …
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were used as an agricultural mode of adsorbent to eliminate crystal violet dye from
aqueous solution. Hence, it was proved that these two materials had a great potential
to treat textile effluent [42]. Agricultural waste Cinnamomum camphora sawdust was
used as a source of biosorbent to expel malachite green dye from aqueous solution.
This C. camphora sawdust was further subjected to surface modification with the
help of an organic acid namely oxalic acid, citric acid, and tartaric acid, respectively.
Surface modification in turn provided a large number of vacant sites which helped in
the effective termination of the dye solution [43]. Chemical modification of cotton
waste resulted in biochar which in turn was further employed to remove methylene
blue and other contaminants existing in aqueous solution [44]. The fruit waste from
sour cherry (Prunus cerasus L.) stones was modified to obtain activated carbon. This
material showed outstanding performance on elimination yellow 18 which is a basic
textile effluent. The activated carbon utilized for the adsorption of yellow 18 was well
described by Langmuir isothermal fit [45]. Bamboo was transformed into biochar by
subjecting it to chemical modification. This chemically modified bamboo showed
significant adsorption capacity, and it was employed to reject methylene blue dye
from aqueous solution. The sorption process was well defined using Langmuir fit
[46]. Pine cone was converted into activated carbon by exposing it chemical modification. The resulting material thus obtained was very potential to get rid of methylene
blue dye [47]. Biochar samples were collected from Hornbeam sawdust by undergoing pyrolysis technique. The different samples were collected at a temperature of
500, 600, 700, and 800 °C. The higher the temperature the more porous the material is. This biochar was further employed to evacuate disperse orange 30 dye from
aqueous solution [48]. Raw eucalyptus seeds were picked as precursor, and these
seeds were further surface modified to upgrade the porosity of the raw eucalyptus
seeds. The surface modification was in turn followed by ultrasonication process to
attain uniform particle size distribution. The final powdered activated carbon material derived by this process was utilized to knock out malachite green from aquatic
system [6]. The agro waste biomass corn pith was collected from agricultural filed
was found to be an effective precursor for eliminating malachite green dye from
aqueous solutions. This waste biomass was treated with conc H 2 SO 4 to increase the
availability of the pores in corn pith, and the Langmuir monolayer sorption capacity
was computed as 488.3 mg/g, and the equilibrium data obeyed pseudo-first order
kinetic model [49]. A macro alga named Sargassum wightii was used as a source of
biomass and the solid waste which remains after oil expulsion was further deployed
as adsorbent material to detach the methylene blue dye molecules present in wastewater system. The equilibrium data was well explained by Freundlich isotherm and
pseudo-second-order model. The sorption of dye molecules onto the surface of the
biomass were managed by film diffusion and particle diffusion, respectively. The
thermodynamic study helped in concluding that the process was spontaneous and
exothermic in nature [50]. The agro waste biomass acquired from raw tea filtrate was
engaged in the sorption process. The biomass was subjected to two surface modification process namely chemical modification and ultrasonication process. The end
product obtained as a result of these two processes is powdered activated carbon material which played a vital role to pull out the azo dye Solochrome Black T, the sorption
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