2021
DOI: 10.3390/w13070893
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Study on the Decontamination Effect of Biochar-Constructed Wetland under Different Hydraulic Conditions

Abstract: To explore the purification effect of biochar-constructed wetlands on rural domestic sewage, six types of biochar-constructed wetlands were constructed for experiments. Under different hydraulic conditions, the removal effects of each biochar-constructed wetland on chemical oxygen demand, ammonia nitrogen, total nitrogen, and total phosphorus in sewage were analyzed. The results showed that the removal rates of the four types of pollutants in each biochar-constructed wetland first increased and then decreased … Show more

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Cited by 19 publications
(5 citation statements)
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“…We found that NH4-N removal efficiency was significantly increased when extending HRT from 1 to 3 days and it was maximized at 5 days, as high as 97% and 91% in the longan and corn biochar-based system, respectively. Xing et al [43] showed that NH4-N in biochar-added systems was substantially removed (approximately 80%) within 24-48 hours and then NH4-N removal slightly increased along with HRT. In comparison, in the pumice-based system where SSA and CEC were significantly lower than biochar, approximately 50% of NH4-N was removed.…”
Section: Discussionmentioning
confidence: 99%
“…We found that NH4-N removal efficiency was significantly increased when extending HRT from 1 to 3 days and it was maximized at 5 days, as high as 97% and 91% in the longan and corn biochar-based system, respectively. Xing et al [43] showed that NH4-N in biochar-added systems was substantially removed (approximately 80%) within 24-48 hours and then NH4-N removal slightly increased along with HRT. In comparison, in the pumice-based system where SSA and CEC were significantly lower than biochar, approximately 50% of NH4-N was removed.…”
Section: Discussionmentioning
confidence: 99%
“…These waste and reusable raw materials are of great significance for the mitigation of environmental pollution [13]. Biochar is a kind of solid material rich in carbon obtained with the pyrolysis of biomass under the conditions of high temperature and oxygen deficiency [14].…”
Section: Improving the Performance Of Constructed Wetlands Using Biocharmentioning
confidence: 99%
“…With an increase in temperature, the number of surface functional groups of biochar decreases. The surface oxygen-containing functional groups include a hydroxyl group, a carboxyl group, and a phenol group [14].…”
Section: Improving the Performance Of Constructed Wetlands Using Biocharmentioning
confidence: 99%
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“…This due to its features as a carbon rich substance, porous material, have diverse functional groups, and very cheap comparing with other adsorbents (Gupta et al, 2016). Biochar was examined as a mixture with other substrate materials to enhance the treatment of different loading rate of low C/N wastewaters (Zhou et al, 2018), synthetic wastewater (Abedi and Mojiri, 2019), and domestic wastewater (Xing et al, 2021) by vertical wetland. Also, it is utilized as a media in HFCW to examine the treatment of synthetic wastewater (Gupta et al, 2016).…”
Section: Introductionmentioning
confidence: 99%