期刊论文

Adsorption of Cd~(2+)from aqueous solution by modified corn straw biochar and peanut shell biochar

Peng, P.

中文

环境工程学报

1673-9108

2016

10

11

6325-6331

10.12030/j.cjee.201506157

(农办财函[2014]28号):农业部与财政部专项 (2006180):湖南省环境科学重点学科建设项目

本校为第一且通讯机构

对玉米秸秆和花生壳炭化制备的生物炭,运用高锰酸钾进行改性,研究其对Cd~(2+)的吸附效果。通过批次吸附实验,考察了两种改性生物炭对Cd~(2+)吸附的初始浓度、pH值、接触时间等因素的影响。结果表明,在pH为6.0,Cd~(2+)浓度为100 mg·L~(-1),温度为20 ℃,吸附时间为12 h,吸附剂投加量为1.0 g·L~(-1)条件下,改性玉米秸秆炭和花生壳炭对Cd~(2+)的去除率分别为67.03%和46.10%,与未改性的生物炭相比,吸附率分别提高了3.8倍和6.2倍。改性玉米秸秆炭和花生壳炭对溶液中Cd~(2+)的吸附均符合Langmuir和Freundlich等温吸附模型,最大吸附量分别为68.97和55.55 mg·g~(-1)。两种改性生物炭的吸附行为均符合准...

Biochars produced from corn straw and peanut shell were modified using KMnO4 solution. A laboratory experiment was conducted to investigate the adsorption of Cd2+ in simulated wastewater, and the effects of initial concentrations of Cd2+, pH values, and contact time on adsorption. Under conditions of pH 6.0, initial Cd2+ concentration 100 mg·L-1, wastewater temperature 20℃, contact time 12 h, and biochar dosage of 1.0 g·L-1, modified corn straw biochar and peanut shell biochar achieved cadmium removal rates of 67.03% and 46.10%, respectively...