title: Sulfonated modification of cotton linter and its application as adsorbent for high-efficiency removal of lead(II) in effluent.
abstract: Sulfonated modification of cotton linter and its novel application as adsorbent for Pb(2+) in effluent were investigated. Results show that sulfonated cotton linter (SCL) has strong adsorbability for Pb(2+), more than 85% of Pb(2+) can be removed at lower Pb(2+) concentration (<20 mg/L). Its adsorbability for Pb(2+) is related to effluent pH, temperature, and initial Pb(2+) concentration. The adsorption process can reach equilibrium within 8 min, which can be described through the pseudo-second-order kinetic model. The adsorption isotherm is closely fitted with the Temkin isotherm model, which suggests that the adsorption of Pb(2+) on SCL can be regarded as chemical adsorption. The adsorption process of Pb(2+) on SCL is non-spontaneous and endothermic, based on the value of Gibbs free energy and enthalpy. Compared with commercial activated carbon, SCL is simple to prepare and does not require any special technology.
authors: Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China; Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China. Electronic address: xiaodong771111@163.com.
authors: Cuihua
authors: C
authors: Dong
authors: Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China.
authors: Haiguang
authors: H
authors: Zhang
authors: Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China.
authors: Zhiqiang
authors: Z
authors: Pang
authors: Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China.
authors: Yu
authors: Y
authors: Liu
authors: Key Laboratory of Pulp & Paper Science and Technology, Shandong Polytechnic University, Jinan 250353, China.
authors: Fulong
authors: F
authors: Zhang
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry; D003368:Gossypium; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013784:Textiles; D013816:Thermodynamics; D013997:Time Factors; D062065:Wastewater; D014873:Water Pollutants / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
chemical_list: D002244:Carbon; D002482:Cellulose; D007854:Lead; D062065:Wastewater; D014873:Water Pollutants; D014874:Water Pollutants, Chemical
keywords: Adsorption; Cotton linter; Pb(2+); Sulfonation