Abstract：
:In this study the treatment of coking wastewater was investigated by an advanced Fenton oxidation process using iron powder and hydrogen peroxide. Particular attention was paid to the effect of initial pH, dosage of H(2)O(2) and to improvement in biodegradation. The results showed that higher COD and total phenol removal rates were achieved with a decrease in initial pH and an increase in H(2)O(2) dosage. At an initial pH of less than 6.5 and H(2)O(2) concentration of 0.3 M, COD removal reached 44-50% and approximately 95% of total phenol removal was achieved at a reaction time of 1 h. The oxygen uptake rate of the effluent measured at a reaction time of 1h increased by approximately 65% compared to that of the raw coking wastewater. This indicated that biodegradation of the coking wastewater was significantly improved. Several organic compounds, including bifuran, quinoline, resorcinol and benzofuranol were removed completely as determined by GC-MS analysis. The advanced Fenton oxidation process is an effective pretreatment method for the removal of organic pollutants from coking wastewater. This process increases biodegradation, and may be combined with a classical biological process to achieve effluent of high quality.
journal_name
Chemospherejournal_title
Chemosphereauthors
Chu L,Wang J,Dong J,Liu H,Sun Xdoi
10.1016/j.chemosphere.2011.09.007subject
Has Abstractpub_date
2012-01-01 00:00:00pages
409-14issue
4eissn
0045-6535issn
1879-1298pii
S0045-6535(11)01039-3journal_volume
86pub_type
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