Fractionational and structural characterization of lignin and its modification as biosorbents for efficient removal of chromium from wastewater:a review  

作　　者：Bing Wang Yong-Chang Sun Run-Cang Sun 

机构地区：[1]Beijing Key Laboratory of Lignocellulosic Chemistry,Beijing Forestry University,Beijing,China [2]Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region,Ministry of Education,School of Environmental Science and Engineering,Chang’an University,Xi’an,China [3]Center for Lignocellulose Science and Engineering,and Liaoning Key Laboratory Pulp and Paper Engineering,Dalian Polytechnic University,Dalian,China

出　　处：《Journal of Leather Science and Engineering》2019年第1期43-67,共25页皮革科学与工程（英文）

基　　金：the financial support by the Central Universities,Beijing Forestry University(2017-17);Chang’an University(300102299203);National Science Foundation of China(41702367);the National Science Foundation of China for a Key Project(31430092);the National Key R&D Program of China(2017YFB0307903).

摘　　要：The removal of chromium(Cr)from wastewater by various adsorbents has been investigated.As compared with the commercial activated carbon,the biosorbents with inexpensive and high adsorption capacities are developed from lignocellulosic wastes.Lignin,existing in lignocellulosic biomass,is the second most abundant resource in nature.Recently,lignin-based bio-sorbents were served as an advanced novel material for the metal ions and dye adsorption from wastewater.It has showed several advantages in the wastewater treatments because of the lowcost,high adsorption capacity,easy recover,and possibility of metal recovery.In this review,the isolation of lignin from lignocellulosic biomass was summarized,and the structural characteristics of lignin were comparably analyzed.The modification of lignin was performed to obtain a large surface area,strong binding-site,and high and quick adsorption properties of lignin-based adsorption materials.The adsorption efficiency of Cr ions was found to be strongly dependent on the pH of the wastewater.To further illustrate the adsorption process,the structural changes and the interactions between the metal ions and the functional groups of the lignin-based biosorbents in the adsorption process should be further investigated.Once the cost-effective and high-efficiency modification techniques are developed,lignin-based adsorbents can be expected to be the most suitable alternatives for Cr ions removal from wastewater in industry.

关 键 词：Lignocellulosic biomass LIGNIN Adsorption WASTEWATER CHROMIUM 

分 类 号：X70[环境科学与工程—环境工程]