Supporting information

Carbon microspheres prepared from the hemicelluloses-rich

pre-hydrolysis liquor for contaminant removal

Yuanyuan Wanga, Xuefei Caoa,*, Shaoni Suna, Ruochen Zhanga, Quentin Shic, Lu

Zhengc, Runcang Suna,b,*

a Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University,

Beijing, 100083, China

b Center for Lignocellulose Science and Engineering, and Liaoning Key Laboratory

Pulp and Paper Engineering，Dalian Polytechnic University , Dalian , China.

c Jining Mingsheng New Materials Co., Ltd., Xinglong Industrial Park, Yanzhou

District, Jining City, Shandong Province, 272101, China

*Authors to whom correspondence should be addressed.

E-mail: rcsun3@bjfu.edu.cn (Runcang Sun)

Tel.: +86-010-62336903; Fax: +86-010-62336903.

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Table S1. The carbon microspheres yields obtained from hydrothermal carbonization

of xylose in the presence of different concentrations of H2SO4 at 180 oC for 12 h.

Concentration (wt.%) 0 0.1 0.5 1.0 2.0

Yield (%) 13.1 35.6 39.4 40.3 43.8

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Table S2. The carbon microspheres yields obtained from the hydrothermal

carbonization of xylose and different lignin model compounds at 180 oC for 12 h.

Feedstock Lignin model compounds Yield (%)

Xylose — 13.1

Xylose Guaiacol 18.6

Xylose 2,6-dimethoxy phenol 16.7

Xylose Guaiacylglycerol-β-guaiacol ether 18.8

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Table S3. The Pb(II) and MB adsorption capacities of carbon microspheres obtained

from the literatures.

Adsorbent PollutantsAdsorption

capacity (mg/g) References

Porous Fe3O4@C

nanocapsulesPb(II) 79.0 (Cheng et al., 2012)

Layered Double

Hydroxides/Hollow

Carbon Microsphere

Pb(II) 205.7 (Huang et al., 2017)

Carbon

microspheres Pb(II) 273.4 This work

Carbonaceous

spheres from

glucose

MB 15.7 (Li et al., 2017)

Magnetic carbon

nanospheres MB 45.15 (Shao et al., 2015)

CAS/OH-APAM MB 348.06 (Zhang et al., 2018)

Carbon

microspheres MB 701.3 This work

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Fig. S1. The carbon microspheres yields obtained from the hydrothermal

carbonization of the PHL in the presence of 2% H2SO4 at 180 oC for different reaction

times.

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910

Fig. S2. SEM images of the carbon microspheres derived from (a) xylose + 0.1%

H2SO4 (× 3000), (b) xylose + 0.5% H2SO4 (× 3000), (c) xylose + 1% H2SO4 (× 3000),

(d) xylose + 2% H2SO4 (× 3000), and (e) xylose (× 10000) at 180 oC for 12 h.

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Fig. S3. FTIR spectra of the carbon microspheres obtained from (a) PHL + 2%

H2SO4, (b) PHL + 2% H2SO4 + acrylic acid at 180 oC for 12 h.

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Fig. S4. The zeta potentials of the carbon microspheres from the PHL in the presence

of 2% sulfuric acid with (a) and without (b) the addition of acrylic acid.

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Fig. S5. Adsorption behaviors of Pb(II) ion and MB on the ACMPHL+H2SO4+Acrylic acid. The

fitting results of Langmuir and Freundlich isotherm models for Pb(II) ion (a) and MB

(b); the fitting results for the pseudo-first-order and pseudo-second-order kinetic

models of Pb(II) ion (c) and MB (d).

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Fig. S6. The calibration equations for Pb(II) ion (a) and MB (b).

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