Desorption of hexavalent chromium from active aerobic granular sludge: Effects of operation parameters on granular bioactivity and stability

被引：4

作者：

Tian C. ^{[1
]}

Wang D. ^{[1
]}

Wang J. ^{[1
]}

Lei Z. ^{[1
]}

Zhang Z. ^{[1
]}

Shimizu K. ^{[1
]}

机构：

[1] Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8572, Ibaraki

来源：

Bioresource Technology Reports | 2020年 / 11卷

基金：

日本学术振兴会;

关键词：

Aerobic granular sludge; Bioactivity; Cations; Desorption; Extracellular polymeric substances; Hexavalent chromium;

D O I：

10.1016/j.biteb.2020.100457

中图分类号：

学科分类号：

摘要：

This study explored hexavalent chromium (Cr (VI)) adsorption onto active aerobic granular sludge (AGS) under neutral condition and then focused on Cr (VI) desorption from the Cr-loaded AGS. The changes of AGS bioactivity and stability were also analyzed with respect to cations release and extracellular polymeric substances (EPS). Among the 6 test desorbents, sodium carbonate (Na2CO3) showed the best performance for Cr (VI) desorption from Cr-loaded AGS, reflecting a better fit to the pseudo-second-order kinetic model (R2 = 0.985–0.995). Granular specific oxygen uptake rate (SOUR) was detected to decrease from the initial 22.38 to 5.55 mg-O2/g-VSS·h after 60 min desorption by 1 M Na2CO3, with integrity coefficient increased from 5.52% to 25.63%. Release of Ca2+, Mg2+ and K+ was mainly from EPS, especially the tightly bound EPS during the desorption process. Moreover, proteins rather than polysaccharides were found to be more sensitive to the increasing Na2CO3 concentration during the desorption process. © 2020 Elsevier Ltd

引用

共 48 条

[1]

Anyanwu B.O., Ezejiofor A.N., Igweze Z.N., Orisakwe O.E., Heavy metal mixture exposure and effects in developing nations: an update, Toxics, 6, 4, (2018)

[2]

Aqeel H., Weissbrodt D.G., Cerruti M., Wolfaardt G.M., Wilen B.-M., pp. 2072-2089

[3]

Basuvaraj M., Fein J., Liss S.N., Protein and polysaccharide content of tightly and loosely bound extracellular polymeric substances and the development of a granular activated sludge floc, Water Res., 82, pp. 104-117, (2015)

[4]

Bradford M.M., A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding, Anal. Biochem., 72, 1, pp. 248-254, (1976)

[5]

Chen K., Zhao Z., Yang X., Lei Z., Zhang Z., Zhang S., Desorption trials and granular stability of chromium loaded aerobic granular sludge from synthetic domestic wastewater treatment, Bioresour. Technol. Rep., 1, pp. 9-15, (2018)

[6]

Daneshvar E., Vazirzadeh A., Niazi A., Kousha M., Naushad M., Bhatnagar A., Desorption of Methylene blue dye from brown macroalga: effects of operating parameters, isotherm study and kinetic modeling, J. Clean. Prod., 152, pp. 443-453, (2017)

[7]

Deng S., Wang L., Su H., Role and influence of extracellular polymeric substances on the preparation of aerobic granular sludge, J. Environ. Manag., 173, pp. 49-54, (2016)

[8]

Dhal B., Thatoi H.N., Das N.N., Pandey B.D., Chemical and microbial remediation of hexavalent chromium from contaminated soil and mining/metallurgical solid waste: a review, J. Hazard. Mater., 250-251, pp. 272-291, (2013)

[9]

DuBois M., Gilles K.A., Hamilton J.K., Rebers P.A., Smith F., Colorimetric method for determination of sugars and related substances, Anal. Chem., 28, 3, pp. 350-356, (1956)

[10]

Fang H.H.P., Xu L.-C., Chan K.-Y., Effects of toxic metals and chemicals on biofilm and biocorrosion, Water Res., 36, 19, pp. 4709-4716, (2002)

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