Study on the adsorption performance of HNO3 and NaOH modified coconut shell activated carbon
LUO Feng1，2，HUANG Bangfu1，2，LI Jianli3，WANG Zhuo1，2，WANG Chunliang1，2，
WANG Defu1，2
1. Faculty School of Metallurgical and Energy Engineering，Kunming University of Science and Technology，
Kunming 650093，China； 2. Clean Metallurgy Key Laboratory of Complex Iron Resources，University of Yunnan
Province，Kunming 650093，China；3. Key Laboratory for Ferrous Metallurgy and Resources Utilization of
Ministry of Education，Wuhan University of Science and Technology，Wuhan 430081，China）
Abstract：In order to improve the adsorption performance of activated carbon, coconut shell activated carbon was
modified with nitric acid and sodium hydroxide. The iodine adsorption value of coconut shell activated carbon
before and after modification was measured. The study shows that the iodine adsorption value of coconut shell activated
carbon after nitric acid modification is reduced by 20.81%; After sodium hydroxide modification, the iodine
adsorption value of coconut shell activated carbon is increased by 4.48%; the two modification methods have
changed the overall adsorption capacity of coconut shell activated carbon, and NaOH modification can also
enhance the non-polar and hydrophobic surface of the activated carbon. By changing the surface chemistry, the
adsorption capacity of coconut shell activated carbon modified by sodium hydroxide is stronger than that of nitric
acid modified activated carbon. Related research results can provide reference for the use of activated carbon to
treat NOx and SO2 in industrial flue gas.
2022, Vol. 32 
