Sorption and Reduction of Hexavalent Chromium from Aqueous Solutions by Surface Modified Biochars

被引：14

作者：

Liu, Qing-Song ^{[1
]}

Li, Yi-Jing ^{[1
]}

机构：

[1] China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2015年 / 50卷 / 17期

关键词：

hexavalent chromium; biochar; sorption; reduction; FUNCTIONAL-GROUPS; ACTIVATED CARBON; HEAVY-METALS; ADSORPTION; REMOVAL; BIOSORPTION; MECHANISM; SOIL; RETENTION; BIOMASS;

D O I：

10.1080/01496395.2015.1062026

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The surface of wheat straw-based biochar was modified by a pretreatment using H3PO4. Biochars with different surface characteristics were obtained and characterized. Their reducing and sorption capacities for aqueous Cr(VI) were evaluated. The removal of Cr(VI) were enhanced with an increase in biochar surface acidity. The sorption performance was related to the equilibrium concentration. Oxygen-containing groups were involved in Cr(III) complexation, some of which were formed due to Cr(VI) oxidation. The competitive sorption of proton was evident for over protonated biochars at low range. Biochar porosity also played a role. The influences of other factors were also discussed.

引用

页码：2617 / 2624

页数：8

共 28 条

[1] Adsorption studies of methylene blue and phenol onto vetiver roots activated carbon prepared by chemical activation [J].

Altenor, Sandro ;

Carene, Betty ;

Emmanuel, Evens ;

Lambert, Jacques ;

Ehrhardt, Jean-Jacques ;

Gaspard, Sarra .

JOURNAL OF HAZARDOUS MATERIALS, 2009, 165 (1-3) :1029-1039

[2] Batch removal of chromium(VI) from aqueous solution by Turkish brown coals [J].

Arslan, Gulsin ;

Pehlivan, Erol .

BIORESOURCE TECHNOLOGY, 2007, 98 (15) :2836-2845

[3] Characterization and application of activated carbon produced by H3PO4 and water vapor activation [J].

Budinova, T. ;

Ekinci, E. ;

Yardim, F. ;

Grimm, A. ;

Bjornbom, E. ;

Minkova, V. ;

Goranova, M. .

FUEL PROCESSING TECHNOLOGY, 2006, 87 (10) :899-905

[4] Potential hazards of hexavalent chromate in our drinking water [J].

Costa, M .

TOXICOLOGY AND APPLIED PHARMACOLOGY, 2003, 188 (01) :1-5

[5] Characteristics and mechanisms of hexavalent chromium removal by biochar from sugar beet tailing [J].

Dong, Xiaoling ;

Ma, Lena Q. ;

Li, Yuncong .

JOURNAL OF HAZARDOUS MATERIALS, 2011, 190 (1-3) :909-915

[6] Synthesis and adsorption properties of polymeric and polymer-based hybrid adsorbent for hexavalent chromium removal [J].

Duranoglu, Dilek ;

Kaya, Ismet Gul Buyruklardan ;

Beker, Ulker ;

Senkal, Bahire Filiz .

CHEMICAL ENGINEERING JOURNAL, 2012, 181 :103-112

[7] Chromium(VI) Biosorption and Bioaccumulation by Live and Acid-Modified Biomass of a Novel Morganella morganii Isolate [J].

Ergul-Ulger, Zeynep ;

Ozkan, Alper Devrim ;

Tunca, Evren ;

Atasagun, Sibel ;

Tekinay, Turgay .

SEPARATION SCIENCE AND TECHNOLOGY, 2014, 49 (06) :907-914

[8] Surface complexation mechanism and modeling in Cr(III) biosorption by a microalgal isolate, Chlorella miniata [J].

Han, Xu ;

Wong, Yuk Shan ;

Tam, Nora Fung Yee .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2006, 303 (02) :365-371

[9] Fabrication and characterization of La-doped HfO2 gate dielectrics by metal-organic chemical vapor deposition [J].

Huang, Liu-Ying ;

Li, Ai-Dong ;

Zhang, Wen-Qi ;

Li, Hui ;

Xia, Yi-Dong ;

Wu, Di .

APPLIED SURFACE SCIENCE, 2010, 256 (08) :2496-2499

[10] Enhanced Lead Sorption by Biochar Derived from Anaerobically Digested Sugarcane Bagasse [J].

Inyang, Mandu ;

Gao, Bin ;

Ding, Wenchuan ;

Pullammanappallil, Pratap ;

Zimmerman, Andrew R. ;

Cao, Xinde .

SEPARATION SCIENCE AND TECHNOLOGY, 2011, 46 (12) :1950-1956

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