Equilibrium adsorption study of the adsorptive removal of Cd2+ and Cr6+ using activated carbon

被引：28
|
作者：
Wang, Weiliang [1 ,2 ]
Liu, Ying [1 ,2 ]
Liu, Xiaohui [3 ]
Deng, Baojun [4 ]
Lu, Shaoyong [5 ]
Zhang, Yaru [1 ]
Bi, Bin [5 ]
Ren, Zongming [1 ,2 ]
机构：
[1] Shandong Normal Univ, Coll Geog & Environm, Jinan 250358, Shandong, Peoples R China
[2] Shandong Nomial Univ, Inst Environm & Ecol, Jinan 250358, Shandong, Peoples R China
[3] Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China
[4] Jinan Environm Monitoring Ctr, Jinan 250014, Shandong, Peoples R China
[5] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2018年 / 25卷 / 25期
基金：
中国国家自然科学基金;
关键词：
Activated carbon; Cr6+; Cd2+; Adsorption-desorption; Speciation; Mechanism; HEAVY-METAL POLLUTION; ZERO-VALENT IRON; AQUEOUS-SOLUTIONS; GRAPHENE OXIDE; SEWAGE-SLUDGE; SPECIATION TRANSFORMATION; CHEMICAL SPECIATION; CR(VI); WATER; IONS;
D O I：
10.1007/s11356-018-2635-5
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The performance of activated carbon (AC) with respect to characterization, adsorption kinetics, thermodynamics, and isotherms was addressed in this study. The effects of initial concentration, pH, contact time, ion strength, and temperature on removal efficiency were also studied. The adsorption isotherms of Cd2+ and Cr6+ on activated carbon can fit the Langmuir model well, and correlation coefficients were above 0.99, all higher than the Freundlich and Temkin models. The maximum adsorption quantities of Cd2+ and Cr6+ were 19.380 and 19.305 mg g(-1) at 25 degrees C, respectively. The adsorption capacities of Cd2+ and Cr6+ are clearly pH dependent. The kinetics of the removal of Cd2+ and Cr6+ was in agreement with a pseudo-second-order model, and the adsorption efficiency of Cd2+ is higher than that of Cr6+. The thermodynamic results showed that increased temperature is favorable to adsorption. The speciation on activated carbon was mainly residual Cd2+ and Cr6+, and the potential ecological risk of Cd2+ is higher than that of Cr6+. The adsorptions of Cd2+ and Cr6+ on activated carbon were dominated by chelation and ion exchange, respectively.
引用
收藏
页码：25538 / 25550
页数：13
相关论文
共 50 条
  • [21] Study on adsorption of Cd2+ by Ti-pillared montmorillonite-mixed activated carbon
    Zhao, Xuxia
    Tuo, Biyang
    Long, Sen
    Song, Xiang
    Wan, Li
    Xiang, Haichun
    MICRO & NANO LETTERS, 2021, 16 (05) : 304 - 312
  • [22] Synthesis of zeolite-supported microscale zero-valent iron for the removal of Cr6+ and Cd2+ from aqueous solution
    Kong, Xiangke
    Han, Zhantao
    Zhang, Wei
    Song, Le
    Li, Hui
    JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2016, 169 : 84 - 90
  • [23] Cd2+ removal from synthetic waters by ZnCl2-activated carbon
    Madankar, Chandu S.
    Bhagwat, Sunil S.
    Meshram, Pawan D.
    MATERIALS TODAY-PROCEEDINGS, 2021, 45 : 4684 - 4688
  • [24] ADSORPTIVE REMOVAL OF CD (II) USING ACTIVATED CARBON PREPARED FROM BARK OF FICUSRACEMOSA
    Gour, K.
    Donadkar, K.
    Rahangdale, P. K.
    1ST INTERNATIONAL CONFERENCE ON ADVANCED ENGINEERING FUNCTIONAL MATERIALS (ICAEFM), 2018, 410
  • [25] Strength evaluation by using polycarboxylate superplasticizer and solidification efficiency of Cr6+, Pb2+ and Cd2+ in composite based geopolymer
    Muhammad, Faheem
    Huang, Xiao
    Li, Shan
    Xia, Ming
    Zhang, Manli
    Liu, Qiang
    Hassan, Muhammad Arshad Shehzad
    Jiao, Binquan
    Yu, Lin
    Li, Dongwei
    JOURNAL OF CLEANER PRODUCTION, 2018, 188 : 807 - 815
  • [26] A comprehensive study to understand removal efficiency for Cr6+ using magnetic and activated biochar through response surface methodology
    Narzari, Rumi
    Poddar, Maneesh Kumar
    Bordoloi, Neonjyoti
    Sarmah, Ajit Kumar
    Kataki, Rupam
    BIOMASS CONVERSION AND BIOREFINERY, 2024, 14 (05) : 5973 - 5987
  • [27] A comprehensive study to understand removal efficiency for Cr6+ using magnetic and activated biochar through response surface methodology
    Rumi Narzari
    Maneesh Kumar Poddar
    Neonjyoti Bordoloi
    Ajit Kumar Sarmah
    Rupam Kataki
    Biomass Conversion and Biorefinery, 2024, 14 : 5973 - 5987
  • [28] Adsorptive Removal of Phenol by Coffee Residue Activated Carbon and Commercial Activated Carbon: Equilibrium, Kinetics, and Thermodynamics
    Khenniche, Lamia
    Benissad-Aissani, Farida
    JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2010, 55 (11): : 4677 - 4686
  • [29] Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution
    El Nemr, Ahmed
    Ismail, Mohamed M. N.
    El Ashry, El Sayed H.
    Hamid, Hamida Abdel
    EGYPTIAN JOURNAL OF CHEMISTRY, 2020, 63 (04): : 1219 - 1240
  • [30] Impregnation of palm shell activated carbon with polyethyleneimine and its effects on Cd2+ adsorption
    Yin, Chun Yang
    Aroua, Mom Kheireddine
    Daud, Wan Mohd Ashri Wan
    COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2007, 307 (1-3) : 128 - 136
12345