A new granular sludge synthesized with the sludge from water supply plants and clay mass at the ratio of 1:2 was developed, and its adsorption behavior towards copper (Ⅱ) was investigated. The granular sludge had favorable adsorption properties towards copper (Ⅱ), and the adsorption amounts increased with the increase of reaction time. At the reaction time of 180min, the adsorption capacity could reach 85% of the maximum adsorption capacity. The kinetic data could be described by the pseudo-second-order kinetics models. The Langmuir isotherm model performed better in fitting the adsorption data at different temperatures. The equilibrium adsorption amounts increased with the increase of the reaction temperature. The granular sludge preferred to adsorb copper (Ⅱ) in the solution mixed with other heavy metal ions. Additionally, pH (the acidity level) can significantly influence the adsorption of copper ions. The removal efficiency of copper ions increased with the increase of pH when pH lower than 5and reached the maximum value at pH 5. SEM and FTIR characterization showed that the granular sludge exhibited a rough surface and porous structure with abundant surface functional groups. Copper ions adsorption of granular sludge was achieved by electrostatic attraction, hydroxyl substituents and surface complexation.
王倩, 杜晓丽, 崔申申, 刘思琪, 龙元源. 给水厂污泥颗粒制备及对铜离子的吸附行为[J]. 中国环境科学, 2019, 39(4): 1672-1677.
WANG Qian, DU Xiao li, CUI Shen-shen, LIU Si-qi, LONG Yuan-yuan. Preparation of granular sludge from water supply plants and its adsorption behavior of copper ions. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(4): 1672-1677.
郭文娟,林海燕,单晓峻.北京市第九水厂排泥水处理系统改造设计分析[J]. 给水排水, 2010,36(9):9-14. Guo W J, Lin H Y, Shan X J. Analysis on the upgrading design of the sludge drainage processing system in the Beijing No.9 Water Treatment Plant[J]. Water & Wastewater Engnieering, 2010,36(9):9-14.
[2]
Zhao X H, Zhao Y Q, Kearney P. Transformation of beneficially reused aluminum sludge to potential P and Al resource after employing as P-trapping material for wastewater treatment in constructed wetland[J]. Chemical Engineering Journal, 2011,174(1):206-212.
[3]
Yang Y, Zhao Y Q, Wang S P, et al. A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate[J]. Water Science & Technology, 2011,63(10):2367-2373.
[4]
刘超,杨永哲,宛娜.铝污泥吸附六价铬的特征和机理[J]. 环境工程学报, 2013,7(1):97-102. Liu C, Yang Y Z, Wan N. Characteristic and mechanisms of chromium (VI) adsorption on alum sludge[J]. Chinese Journal of Environmental Engineering, 2013,7(1):97-102.
[5]
Makris K, Sarkar D, Datta R. Aluminum-based drinking-water treatment residuals:a novel sorbent for perchlorate removal[J]. Environmental Pollution, 2006,140(1):9-12.
[6]
Chen J H, Liu Q L, Hu S R, et al. Adsorption mechanism of Cu(Ⅱ) ions from aqueous solution by glutaraldehyde crosslinked humic acid-immobilized sodium alginate porous membrane adsorbent[J]. Chemical Engineering Journal, 2011,173(2):511-519.
[7]
Chao L, Zhang T, Yang B, et al. Manganese dioxide/iron oxide/acid oxidized multi-walled carbon nanotube magnetic nanocomposite for enhanced hexavalent chromium removal[J]. Chemical Engineering Journal, 2013,234(19):266-275.
[8]
Al-musawi, T J, Brouers, F, Zarrabi, M. Kinetic modeling of antibiotic adsorption onto different nanomaterials using the Brouers-Sotolongo fractal equation[J]. Environment Science and Pollution Research, 2017,24(4):4048-4057.
[9]
Wang X S, Qin Y. Equilibrium sorption isotherms for of Cu2+ on rice bran[J]. Process Biochemistry, 2005,40(2):677-680.
[10]
Hakan D, Cihan G. Adsorption of copper (Ⅱ) from aqueous solutions on activated carbon prepared from grape bagasse[J]. Journal of Cleaner Production, 2016,124(15):103-113.
[11]
刘辉,李平,魏雨,等.红外光谱技术在铁氧化物形成研究中的应用[J]. 河北师范大学学报, 2005,29(3):272-276. Liu H, Li P, Wei Y, et al. Application of IR spectra in the studies on the formation of iron (hydr) oxides[J]. Journal of He bei Normal University, 2005,29(3):272-276.
[12]
Štandeker S, Novak Z, Knez Z. Adsorption of toxic organic compounds from water with hydrophobic silica aerogels[J]. Journal of Colloid and Interface Science, 2007,310(2):362-368.
[13]
蒋婷婷.不同改性蒙脱土的制备及其对土壤重金属的稳定化作用研究[D]. 上海:华东理工大学, 2016. Jiang T T. Synthesis of differently modified montmorillonites and application in stabilization of soil heavy metals[D]. Shanghai:East China University of Science Technology, 2016.
[14]
韩强,杜晓丽,崔申申,等.颗粒态铁锰复合氧化物对磷的吸附特征及影响因素[J]. 化工进展, 2017,36(6):2311-2317. Han Q, Du X L, Cui S S, et al. Adsorptive characteristics and effect parameters of granular Fe-Mn binary oxide for phosphate[J]. Chemical Industry and Engineering Progress, 2017,36(6):2311-2317.
[15]
Du X L, Han Q, Li J Q, et al. The behavior of phosphate adsorption and its reactions on the surfaces of Fe-Mn oxide adsorbent[J]. Journal of Taiwan Institute of Chemical Engineers, 2017,76:167-175.
