Amino-functionalized sewage sludge-derived biochar as sustainable efficient adsorbent for Cu(II) removal

Tang, Siqi1,2; Shao, Ningning1; Zheng, Chunmiao1,2; Yan, Feng1; Zhang, Zuotai1,3

2019-05

10.1016/j.wasman.2019.04.042

WASTE MANAGEMENT   影响因子和分区

0956-053X

Sludge biochar as promising low-cost adsorbent has increasingly gained interests, but its poor surface functionality severely undermines its adsorption capacity and selectivity. Here a facile amino functionalization strategy was first proposed to enhance the surface functionality of sewage sludge derived biochar (SSDB) via the combination of sol-gel process for mesoporous silica coating and silylation for highly selective removal of Cu(II). The prepared amino-functionalized SSDB showed excellent adsorption capacity of 74.51 mg/g at room temperature, increasing by nearly 118% with regard to the unfunctionalized SSDB, and prominent selectivity (minute separation factor SFCo, (Ni,) (zn/Cu)) toward Cu(II) uptake. Characterizations demonstrated amine groups on the SSDB, the surface density of which reached 1.34 mg/m(2). The adsorption kinetics of Cu(II) on amino-functionalized SSDB was well described by a pseudo-second order kinetic model while the adsorption isotherm data was well fitted by Sips model. The pH range in which the adsorption preferentially occurred was 3-5. The occurrence of amine group protonation undermined adsorption performance at a pH < 3. These effects of amino-functionalized SSDB toward Cu(II) uptake were a result of the grafted amine groups specifically complexing with Cu (II) in the tetrahedron. Hence, prominent adsorption performance and low-cost feedstock make amino-functionalized SSDB a sustainable adsorbent for Cu(II) removal in water resulting in a cleaner utilization of sewage sludge. (C) 2019 Elsevier Ltd. All rights reserved.

Sewage sludge pyrolysis Biochar Amino functionalization Cu(II) uptake Selective adsorption

SCI ; EI

英语

第一 ; 通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000470053500003

PERGAMON-ELSEVIER SCIENCE LTD

20191706818890

Adsorption ; Costs ; Nickel compounds ; Sewage sludge ; Silica ; Sol-gel process ; Zinc compounds

Sewage Treatment:452.2 ; Chemical Operations:802.3 ; Glass:812.3 ; Cost and Value Engineering; Industrial Economics:911

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China
2.Peking Univ, Coll Engn, Dept Energy & Resources Engn, Beijing 100871, Peoples R China
3.Key Lab Municipal Solid Waste Recycling Technol &, Shenzhen 518055, Peoples R China

Tang, Siqi,Shao, Ningning,Zheng, Chunmiao,et al. Amino-functionalized sewage sludge-derived biochar as sustainable efficient adsorbent for Cu(II) removal[J]. WASTE MANAGEMENT,2019,90:17-28.

Tang, Siqi,Shao, Ningning,Zheng, Chunmiao,Yan, Feng,&Zhang, Zuotai.(2019).Amino-functionalized sewage sludge-derived biochar as sustainable efficient adsorbent for Cu(II) removal.WASTE MANAGEMENT,90,17-28.

Tang, Siqi,et al."Amino-functionalized sewage sludge-derived biochar as sustainable efficient adsorbent for Cu(II) removal".WASTE MANAGEMENT 90(2019):17-28.