浓硫酸改性活性炭对模拟废水中苯酚的吸附研究

摘要

A new adsorbent was synthesized from activated carbon which was modified by concentrated sulfuric acid and the performance of the adsorbent for phenol was carried out. The experimental results showed that the optimal absorption conditions were as follows:when the adsorption temperature was 35 ℃, the initial concentration of phenol was 0. 8 g/L, the adsorbent dosage was 1. 0 g and the adsorption time was 20 min, the removal rate was up to 96. 2%. Compared with the unmodified activated carbon, the adsorption effect was greatly improved. What’s more, the adsorbent was reused after 5 times, the removal rate was still up to more than 70. 0%. Experiments showed that the activated carbon treated by sulfuric acid acts as a good adsorbent in the performance of adsorption for phenol.%采用浓硫酸改性活性炭作吸附剂,研究其对模拟废水中苯酚的吸附性能。结果表明：在35℃,含酚废水初始浓度0．8 g/L,改性活性炭用量1．0 g,吸附时间20 min的条件下,改性活性炭对水中苯酚的去除率达到96．2%,相对于未改性的活性炭,其吸附效果有了较大的提高,且该吸附剂重复使用5次后的去除率仍达70．0%。实验证明,浓硫酸改性的活性炭可作为优良的吸附剂处理废水中的苯酚。