Abstract：
:In this paper, rice straw was esterified thermochemically with citric acid (CA) to produce potentially biodegradable cationic sorbent. The modified rice straw (MRS) and crude rice straw (CRS) were evaluated for their methylene blue (MB) removal capacity from aqueous solution. The effects of various experimental parameters (e.g., initial pH, sorbent dose, dye concentration, ion strength, and contact time) were examined. The ratio of MB sorbed on CRS increased as the initial pH was increased from pH 2 to 10. For MRS, the MB removal ratio came up to the maximum value beyond pH 3. The 1.5 g/l or up of MRS could almost completely remove the dye from 250 mg/l of MB solution. The ratio of MB sorbed kept above 98% over a range from 50 to 450 mg/l of MB concentration when 2.0 g/l of MRS was used. Increase in ion strength of solution induced decline of MB sorption. The isothermal data fitted the Langmuir model. The sorption processes followed the pseudo-first-order rate kinetics. The intraparticle diffusion rate constant (k(id)) was greatly increased due to modification.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Gong R,Zhong K,Hu Y,Chen J,Zhu Gdoi
10.1016/j.jenvman.2007.04.004subject
Has Abstractpub_date
2008-09-01 00:00:00pages
875-80issue
4eissn
0301-4797issn
1095-8630pii
S0301-4797(07)00165-Xjournal_volume
88pub_type
杂志文章abstract：:China's rapid industrialization has induced water and energy shortage issue. Since water and energy resources are inextricably connected, the synergetic conservation of these two resources is conducive to China's sustainable development. In this paper, using a heterogeneous stochastic frontier model, we estimate the o...
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journal_title：Journal of environmental management
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doi：10.1016/j.jenvman.2016.07.042
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