Bridging biophilic design and environmentally sustainable design: A critical review

Applying constructed wetland-microbial electrochemical system to enhance NH4+ removal at low temperature.

Protective effects of selenium yeast against cadmium-induced necroptosis through miR-26a-5p/PTEN/PI3K/AKT signaling pathway in chicken kidney.

Enhanced nitrogen removal of constructed wetlands by coupling with the bioelectrochemical system under low temperature: Performance and mechanism

Constructed wetlands can play an active role in improving the water quality of urban rivers. In this study, a sequential series system of the floating-bed constructed wetland (FBCW), horizontal subsurface flow constructed wetland (HSFCW), and surface flow constructed wetland (SFCW) were constructed for the urban river treatment in the cold regions of North China, which gave full play to the combined advantages. In the Yitong River, the designed capacity and the hydraulic loading of the system was 100 m3/d and 0.10 m3/m2d, respectively. The hydraulic retention time was approximately 72 h. The monitoring results, from April to October in 2016, showed the multiple wetland ecosystem could effectively remove chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), total phosphate (TP), and suspended solids (SS) at average removal rates of 74.79%, 80.90%, 71.12%, 78.44%, and 91.90%, respectively. The removal rate of SS in floating-bed wetland was the largest among all the indicators (80.24%), which could prevent the block of sub-surface flow wetland effectively. The sub-surface flow wetland could remove the NH4-N, TN, and TP effectively, and the contribution rates were 79.20%, 64.64%, and 81.71%, respectively. The surface flow wetland could further purify the TN and the removal rate of TN could reach 23%. The total investment of this ecological engineering was $12,000. The construction cost and the operation cost were $120 and $0.02 per ton of polluted water, which was about 1/3 to 1/5 and 1/6 to 1/3 of the conventional sewage treatment, respectively. The results of this study provide a technical demonstration of the restoration of polluted water in urban rivers in northern China.

Purification Effect of Sequential Constructed Wetland for the Polluted Water in Urban River

Mechanical properties, durability and application of ultra-high-performance concrete containing coarse aggregate (UHPC-CA): A review

The issue of urban river pollution has attracted great attention due to high concentrations of ammonia nitrogen (NH4+-N) and low concentrations of dissolved oxygen (DO) in polluted water bodies. In order to investigate the effects of aeration-enhanced horizontal subsurface-flow constructed wetlands on polluted river water, unaerated aeration (NA), continuous aeration (CA), and intermittent aeration (IA) constructed wetlands were established. The purification effects of the wetland on various pollutants and the form of effluent nitrogen, influences of temperature on the removal rates of pollutants, the change of redox potential—oxidation reduction potential (ORP)—and the difference of dissolved oxygen (DO) between influent and effluent were investigated. The results indicated that aeration enhancement can improve the purification efficiencies of chemical oxygen demand (COD) and NH4+-N in constructed wetlands. The purification efficiencies of TN in IA and CA constructed wetlands were 91.9% and 53.7%, respectively, indicating that IA is the optimized aeration method for removal of various pollutants in wetlands. Changes of DO and ORP in effluent under IA and CA suggested improvement of aeration on the water environment. Meanwhile, DO was more sensitive to temperature compared with ORP. Additionally, a study of the nitrogen content in effluent suggested that the aeration method had a significant influence on the nitrogen content in effluent. The removal rates of both NH4+-N and TN degraded as the temperature dropped. The results also demonstrated that the removal rate of NH4+-N under aeration condition was more sensitive to temperature than that under NA condition and the effect of temperature on the removal rate of NH4+-N was greater than that of TN.

Study on the purification effect of aeration-enhanced horizontal subsurface-flow constructed wetland on polluted urban river water

Synergistic enhancement of thermal conduction and microwave absorption of silica films based on graphene/chiral PPy/Al2O3 ternary aerogels

Enhanced heat conductance and microwave absorption of 2D laminated Ti3C2Tx MXene microflakes via steering surface, defects, and interlayer spacing

Defect and Interface Co-Steering Ultra-Wide Microwave Absorption and Superior Thermal Conductance of Tio 2 /Fe/C Nanocomposites

Lishan Wu

Papers

Mechanical properties, durability and application of ultra-high-performance concrete containing coarse aggregate (UHPC-CA): A review

Study on the purification effect of aeration-enhanced horizontal subsurface-flow constructed wetland on polluted urban river water

Synergistic enhancement of thermal conduction and microwave absorption of silica films based on graphene/chiral PPy/Al2O3 ternary aerogels

Enhanced heat conductance and microwave absorption of 2D laminated Ti3C2Tx MXene microflakes via steering surface, defects, and interlayer spacing

Defect and Interface Co-Steering Ultra-Wide Microwave Absorption and Superior Thermal Conductance of Tio 2 /Fe/C Nanocomposites