An untried,low cost,locally available biosorbent for its anionic dye removal capacity from aqueous solution was investigated.Powder prepared from peanut hull had been used for biosorption of three anionic dyes,amarant...An untried,low cost,locally available biosorbent for its anionic dye removal capacity from aqueous solution was investigated.Powder prepared from peanut hull had been used for biosorption of three anionic dyes,amaranth (Am),sunset yellow (SY) and fast green FCF (FG).The effects of various experimental parameters (e.g.initial pH and dye concentration,sorbent dosage,particle size,ion strength,contact time etc.) were examined and optimal experimental conditions were decided.At initial pH 2.0,three dyes studied could be removed effectively.When the dye concentration was 50 mg·L -1 ,the percentages of dyes sorbed was 95.5% in Am,91.3% in SY and 94.98% in FG,respectively.The ratios of dyes sorbed had neared maximum values in all three dyes when sorbent dose of 5.0 g·L -1 and the sorbent particle size in 80～100 mesh was used.The increasing the ion strength of solution caused the decrease in biosorption percentages of dyes.The equilibrium values arrived at about 36 hour for all three dyes.The isothermal data of biosorption followed the Langmuir and Freundlich models.The biosorption processes conformed the pseudo-first-order rate kinetics.The results indicated that powdered peanut hull was an attractive candidate for removing anionic dyes from dye wastewater.展开更多
以天然产物花生壳粉作为基质,环氧氯丙烷为交联剂,活性绿19(Reactive Green 19,简称RG19)为修饰剂,制备了新型的生物吸附剂RG19修饰花生壳粉微球,比较了RG19修饰花生壳粉前后对溶菌酶的吸附性能,包括吸附溶液的pH,溶菌酶的初始浓度,吸...以天然产物花生壳粉作为基质,环氧氯丙烷为交联剂,活性绿19(Reactive Green 19,简称RG19)为修饰剂,制备了新型的生物吸附剂RG19修饰花生壳粉微球,比较了RG19修饰花生壳粉前后对溶菌酶的吸附性能,包括吸附溶液的pH,溶菌酶的初始浓度,吸附时间,温度及NaCl的浓度对吸附的影响。结果表明,用25.0 mgRG19修饰花生壳粉微球处理溶菌酶溶液10 mL,pH值7.4,吸附时间4 h的条件下,对溶菌酶的吸附量是149.6mg·g-1,其酶活力保持率为96.4%,而未修饰的花生壳粉微球对溶菌酶的吸附量只有23.6 mg·g-1,修饰后是修饰前的6.3倍。在上述条件下从鸡蛋清中分离纯化溶菌酶,纯化倍数为31.0,收得率为64.2%。而且该吸附剂的复用性好。展开更多
文摘An untried,low cost,locally available biosorbent for its anionic dye removal capacity from aqueous solution was investigated.Powder prepared from peanut hull had been used for biosorption of three anionic dyes,amaranth (Am),sunset yellow (SY) and fast green FCF (FG).The effects of various experimental parameters (e.g.initial pH and dye concentration,sorbent dosage,particle size,ion strength,contact time etc.) were examined and optimal experimental conditions were decided.At initial pH 2.0,three dyes studied could be removed effectively.When the dye concentration was 50 mg·L -1 ,the percentages of dyes sorbed was 95.5% in Am,91.3% in SY and 94.98% in FG,respectively.The ratios of dyes sorbed had neared maximum values in all three dyes when sorbent dose of 5.0 g·L -1 and the sorbent particle size in 80～100 mesh was used.The increasing the ion strength of solution caused the decrease in biosorption percentages of dyes.The equilibrium values arrived at about 36 hour for all three dyes.The isothermal data of biosorption followed the Langmuir and Freundlich models.The biosorption processes conformed the pseudo-first-order rate kinetics.The results indicated that powdered peanut hull was an attractive candidate for removing anionic dyes from dye wastewater.
