Liu W, Zhang J, Zhang, C, et al. Adsorptive removal of Cr (VI) by Fe-modified activated carbon prepared from trapa natans husk[J]. Chemical Engineering Journal, 2010, 162: 677-684.
|
Sikaily E A, Nemr A E, Khaled A, et al. Removal of toxic chromium from waste water using green alga ulva lactuca and its activated carbon[J]. Journal of Hazardous Materials, 2007, 148: 216-228.
|
Li H, Li Z, Liu T, et al. A novel technology for biosorption and recovery of hexavalent chromium in wastewater by bio-functional magnetic beads[J]. Bioresource Technology, 2008, 99: 6271-6279.
|
Arslan G, Edebali S, Pehlivan E. Physical and chemical factors affecting the adsorption of Cr(VI) via humic acids extracted from brown coals[J]. Desalination, 2010: 255, 117-123.
|
Kim S D, Park K S, Gu M B. Toxicity of hexavalent chromium to daphnia magna: influence of reduction reaction by ferrous iron[J]. Journal of Hazardous Materials, 2002, A93: 155-164.
|
Dönmez G, Aksu Z. Removal of chromium (VI) from salina wastewaters by dunaliella species[J]. Process Biochemistry, 2002, 38: 751-762.
|
Gottipati R, Mishra S. Process optimization of adsorption of Cr (VI) on activated carbons prepared from plant precursors by a two-level full factorial design[J]. Chemical Engineering Journal, 2010, 160: 99-107.
|
Baral A, Engelken R D. Chromium-based regulations and greening in metal finishing industries in the USA[J]. Environmental Science and Policy, 2002, 5: 121-133.
|
Terry P A. Characterization of Cr ion exchange with hydrotalcite[J]. Chemosphere, 2004, 57: 541-546.
|
Ölmez T. The optimization of Cr(VI) reduction and removal by electrocoagulation using response surface methodology[J]. Journal of Hazardous Materials, 2009, 162: 1371-1378.
|
Alguacil F J, Caravaca C, Martin M I. Transport of chromium(VI) through a cyanex 921-supported liquid membrane from HCI solutions[J]. Journal of Chemical Technology and Biotechnology, 2003, 78: 1048-1053.
|
Dan? V. Kinetic and thermodynamic studies of the biosorption of Cu (Ⅱ) by agaricus campestris[J]. Environmental Progress and Sustainable Energy, 2011, 30: 177-185.
|
Moussavi G, Barikbin B. Biosorption of chromium (VI) from industrial wastewater onto pistachio hull waste biomass[J]. Chemical Engineering Journal, 2010, 162: 893-900.
|
Liu Z, Zhang F S. Removal of copper (Ⅱ) and phenol from aqueous solution using porous carbons derived from hydrothermal chars[J]. Desalination, 2011, 267: 101-106.
|
Liu W J, Zeng F X, Jiang H, et al. Preparation of high adsorption capacity bio-chars from waste biomass[J]. Bioresource Technology, 2011, 102: 8247-8252.
|
Cheng H N, Wartelle L H, Klasson K T, et al. Solid-state NMR and ESR studies of activated carbons produced from pecan shells[J]. Carbon, 2010, 48: 2455-2469.
|
Mohan D, Pittman J C U, Bricka M, et al. Sorption of arsenic, cadmium, and lead by chars produced from fast pyrolysis of wood and bark during bio-oil production[J]. Journal of Colloid Interface Science, 2007, 310: 57-73.
|
Cao N, Darmstadt H, Roy C. Activated carbon produced from charcoal obtained by vacuum pyrolysis of softwood bark residues[J]. Energy Fuels, 2001, 15: 1263-1269.
|
Mohan D, Rajput S, Singh V K, et al. Modeling and evaluation of chromium remediation from water using low cost bio-char, a green adsorbent[J]. Journal of Hazardous Materials, 2011, 188: 319-333.
|
Wang X J, Wang Y, Wang X, et al. Microwave-assisted preparation of bomboo charcoal-based iron-containing adsorbents for Cr(VI) removal[J]. Chemical Engineering Journal, 2011, 174: 326-332.
|
Kiliç M, Kirbiyik C, Cepeliogullar Ö, et al. Adsorption of heavy metal ions from aqueous solutions by bio-char, a by-product of pyrolysis[J]. Applied Surface Science, 2013, 283: 856-862.
|
Mohan D, Sarswat A, Ok Y S, et al. Organic and inorganic contaminants removal from water with biochar, a renewable, low cost and sustainable adsorbent-A critical review[J]. Bioresource Technology, 2014, 160: 191-202.
|
Zhou Y, Gao B, Zimmerman A R, et al. Biochar-supported zerovalent iron for removal of various contaminants from aqueous solutions[J]. Bioresource Technology, 2014, 152: 538-542.
|
Deveci H, Kar Y. Adsorption of hexavalent chromium from aqueous solutions by bio-chars obtained during biomass pyrolysis[J]. Journal of Industrial and Engineering Chemistry, 2013, 19: 190-196.
|
Kar Y. Co-pyrolysis of walnut shell and tar sand in a fixed-bed reactor[J]. Bioresource Technology, 2011, 102: 9800-9805.
|
Sürmen Y, Demirba? A. Cofiring of biomass and lignite blends: Resource facilities; technological and environmental issues[J]. Energy Sources, 2003, 25: 175-187.
|
Nowicki P, Pietrzak R, Wachowska H. Sorption properties of activated carbons obtained from walnut shells by chemical and physical activation[J]. Catalysis Today, 2010, 150: 107-114.
|
Pehlivan E, Altun T. Biosorption of chromium (VI) ion from aqueous solutions using walnut, hazelnut and almond shell[J]. Journal of Hazardous Materials, 2008, 155: 378-384.
|
APHA. Standard methods for the examination of water and wastewater[S]. 17th ed, APHA-WWA-WPCF, vol. 3, 1989.
|
Raveendran K, Ganesh A. Adsorption characteristics and pore-development of biomass-pyrolysis char[J]. Fuel, 1998, 77: 769-781.
|
Nameni M, Alavi Moghadam M R, Arami M. Adsorption of hexavalent chromium from aqueous solutions by wheat bran[J]. International Journal of Environmental Science and Technology, 2008, 5: 161-168.
|
Mor S, Ravindra K, Bishnoi N R. Adsorption of chromium from aqueous solution by activated alumina and activated charcoal[J]. Bioresource Technology, 2007, 98: 954-957.
|
Karthikeyan T, Rajgopal S, Miranda L R. Chromium (VI) adsorption from aqueous solution by hevea brasilinesis sawdust activated carbon[J]. Journal of Hazardous Materials, 2005, B124: 192-199.
|
Pehlivan E, Kahraman H, Pehlivan E. Sorption equilibrium of Cr(VI) ions on oak wood charcoal (Carbo Ligni) and charcoal ash as low-cost adsorbents[J]. Fuel Processing Technology, 2011, 92: 65-70.
|
Baral S S, Dasa S N, Rath P. Hexavalent chromium removal from aqueous solution by adsorption on treated sawdust[J]. Biochemical Engineering Journal, 2006, 31: 216-222.
|
Jain M, Garg V K, Kadirvelu K. Adsorption of hexavalent chromium from aqueous medium onto carbonaceous adsorbents prepared from waste biomass[J]. Journal of Environmental Management, 2010, 91: 949-957.
|
Wang F Y, Wang H, Ma J W. Adsorption of cadmium (Ⅱ) ions from aqueous solution by a new low-cost adsorbent-bamboo charcoal[J]. Journal of Hazardous Materials, 2010, 177: 300-306.
|
Bansal M, Singh D, Garg V K. A comparative study for the removal of hexavalent chromium from aqueous solution by agricultural wastes’carbons[J]. Journal of Hazardous Materials, 2009, 171: 83-92.
|
Dakiky M, Khamis M, Manassra A, et al. Selective adsorption of chromium(VI) in industrial wastewater using low-cost abundantly available adsorbents[J]. Advances in Environmental Research, 2002, 6: 533-540.
|
Karatas M. Removal of Pb(Ⅱ) from water by natural zeolitic tuff: kinetics and thermodynamics[J]. Journal of Hazardous Materials, 2012, 199-200: 383-389.
|
Altun T, Pehlivan E. Removal of Cr(VI) from aqueous solutions by modified walnut shells[J]. Food Chemistry, 2012, 132: 693-700.
|
Kadirvelu K, Thamaraiselvi K, Namasivayam C. Adsorption of nickel (Ⅱ) from aqueous solution onto activated carbon prepared from coir pith[J]. Separation and Purification Technology, 2001, 24: 497-505.
|
Babel S, Kurniawan T A. Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan[J]. Chemosphere, 2004, 54: 951-967.
|
Demiral H, Demiral Í, Tümsek F, et al. Adsorption of chromium(VI) from aqueous solution by activated carbon derived from olive bagasse and applicability of different adsorption models[J]. Chemical Engineering Journal, 2008, 144: 188-196.
|
Aydin Y A, Aksoy N D. Adsorption of chromium on chitosan: optimization, kinetics and thermodynamics[J]. Chemical Engineering Journal, 2009, 151: 188-194.
|
Ho Y S, Mckay G. Pseudo-second order model for sorption processes[J]. Process Biochemistry, 1999, 34: 451-465.
|
Wang X S, Chen L F, Li F Y, et al. Removal of Cr(VI) with wheat-residue derived black carbon: Reaction mechanism and adsorption performance[J]. Journal of Hazardous Materials, 2010, 175: 816-822.
|
Romero-Gonzalez J, Peralta-Videa J R, Rodriguez E. Determination of thermodynamic parameters of Cr(VI) adsorption from aqueous solution onto Agave lechuguilla biomass[J]. The Journal of Chemical Thermodynamics, 2005, 37: 343-347.
|
Panda L, Das B, Rao D S, et al. Application of dolochar in the removal of cadmium and hexavalent chromium ions from aqueous solutions[J]. Journal of Hazardous Materials, 2011, 192: 822-831.
|
Singh D B, Prasad G, Rupainwar D C. Adsorption technique for the treatment of As (V) rich effluents[J]. Colloids and Surfaces, 1996, A 111: 49-56.
|
Seyf-laye Alfa-Sika M, Liu F, Chen H. Optimization of key parameters for chromium (VI) removal from aqueous solutions using activated charcoal[J]. Journal of Soil Science and Environmental Management, 2010, 1(3): 55-62.
|
Anandkumar J, Mandal B. Removal of Cr(VI) from aqueous solution using bael fruit (Aegle marmelos correa) shell as an adsorbent[J]. Journal of Hazardous Materials, 2010, 168: 633-640.
|
Dubey S P, Gopal K. Adsorption of chromium (VI) on low cost adsorbents derived from agricultural waste material: a comparative study[J]. Journal of Hazardous Materials, 2007, 145: 465-470.
|
Hamadi N K, Chen X D, Farid M M, et al. Adsorption kinetics for the removal of chromium (VI) from aqueous solution by adsorbent derived from used tyres and sawdust[J]. Chemical Engineering Journal, 2001, 84: 95-105.
|