Assessment of Nutrients Removal by Constructed Wetlands Using Reed Grass (Phragmites australis L.) and Vetiver Grass (Vetiveria Zizanioides L.)

Ky, Nguyen Minh; Hung, Nguyen Tri Quang; Manh, Nguyen Cong; Lap, Bui Quoc; Dang, Huyen; Ozaki, Akinori

doi:10.5109/2558907

Cited by 11 publications

(4 citation statements)

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“…Aquatic vegetation plays an important role in both dissolved and particulate P transport in agricultural headwater streams, particularly in spring. Roughly 31% of the SRP and 95% of the fine particles were retained within the reach during the spring season when dense vegetation was actively emerging and acting as an uptake mechanism for SRP and a physical filter for fine particles (Ky et al., 2020; O’Brien et al., 2014). Vegetation influences nutrient retention through two mechanisms.…”

Section: Discussionmentioning

confidence: 99%

Importance of Dense Aquatic Vegetation in Seasonal Phosphate and Particle Transport in an Agricultural Headwater Stream

Field,

Sawyer,

Welch

et al. 2023

Water Resources Research

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Agricultural headwater streams and ditches commonly host dense stands of aquatic vegetation that grow and decay over seasons and exert physical and biological controls on the transport of nutrients from cropland to larger rivers. This study examined changes in the transport of phosphorus (P) in an agricultural drainage ditch in the Maumee River Basin (Ohio, USA) by conducting constant rate injections of a novel tracer mixture [conservative salt (Cl as NaCl), dissolved P (KH2PO4), and a fluorescent fine particle] in spring, summer, and fall. We quantified transport behavior for solutes and particles using a traditional transient storage modeling framework consisting of mobile and immobile storage zones connected by a first‐order exchange rate constant. Transient storage was greatest during the spring, when thicker vegetation caused more pooling and flow stagnation, and decreased through fall, as vegetation thinned. Soluble P uptake lengths were 8.7 times longer in fall than spring, likely due to declines in biological uptake rates with colder temperatures and immobile zone storage with thinning vegetation. Particle capture lengths also decreased by a factor of 4.3 from fall to spring. With the increasing eutrophication of Lake Erie and waterbodies around the world that lie downstream from agricultural landscapes, it is beneficial to understand nutrient transport across watersheds, including small agricultural streams. This study highlights the physical and biological roles that aquatic vegetation plays in small agricultural streams by creating seasonally variable immobile zones that slow the flow of nutrients, providing surface area for biofilms, and capturing particles that bind nutrients.

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Section: Discussionmentioning

confidence: 99%

Importance of Dense Aquatic Vegetation in Seasonal Phosphate and Particle Transport in an Agricultural Headwater Stream

Field,

Sawyer,

Welch

et al. 2023

Water Resources Research

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“…e results showed that vetiver was able to reduce BOD up to 90 at low POME concentration and 60 at high POME concentration, while control sets (plant-free) were only able to reduce 15 BODs. e reduction in COD was 94% at low POME concentrations and 39% at high concentrations, while the control showed only 12% reduction [30,31].…”

Section: Introductionmentioning

confidence: 89%

Evaluation of Phytoremediation Potential of Vetiver Grass (Chrysopogon zizanioides (L.) Roberty) for Wastewater Treatment

Mahmoudpour

Gholami

Ehteshami

et al. 2021

Advances in Materials Science and Engineering

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Water pollution is one of the most critical global issues. Meanwhile, the problem of water pollution of rivers especially in Iran is rising due to expansion of agricultural and industrial applications. Due to a large number of sewer catchments, there are some dam reservoirs like ZHAVE in Iranian state of Kurdistan that have not been able to collect significant amount of water since last 10 years. Removal of heavy metals as contaminants from runoffs and recycling of water is a necessity and a vital issue in the world. Various methods and standards are invented and used to isolate and remove all types of pollutants. This study focuses on the purification and removal of contaminants in water sources using the phytoremediation method by introducing Vetiver grass species in the case of floating treatment wetland (FTW). This study’s preliminary purpose is to investigate a practical remedial solution and improvement methodology for the water quality of reservoirs and rivers by growing the floating Vetiver island method. The results show that following parameters such as COD by 97%, TN by 90%, phosphorus by 66%, TDS by 26%, and evapotranspiration by 40% were reduced. Therefore, we concluded that for a wastewater with varying neutrient concentrations such as in ZHAVE dam, concentration of nutrients N and P was controlled and consequently inhibition and prevention of the eutrophication of water resources in the medium and long term became possible due to reduction in the rate of evaporation from reservoirs.

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“…Thực tế cho thấy trước các áp lực hoạt động của phát triển kinh tếxã hội, các nguồn nước đã bị ô nhiễm và có dấu hiệu suy thoái [4]. Do đó, nhu cầu cấp thiết nghiên cứu áp dụng các biện pháp nhằm đề xuất khắc phục sự ô nhiễm theo hướng phát triển xanh, bền vững sinh thái và thân thiện môi trường [5][6]. Đặc biệt như các sản phẩm biochar có nguồn gốc từ sinh khối hay phụ phẩm nông nghiệp đóng vai trò hấp phụ và vật liệu mang sinh học thân thiện có khả năng loại bỏ hợp chất hữu cơ, các chất hoạt động bề mặt, chất ô nhiễm dinh dưỡng (N, P) từ các loại nước thải khác nhau [7][8].…”

Section: đặT Vấn đềunclassified

Khảo sát khả năng hấp phụ xử lý nước của than sinh học tạo thành từ sinh khối phụ phẩm nông nghiệp

Mạnh¹,

Hưng²,

Trí³

et al. 2022

VNJHM

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Bài báo trình bày kết quả áp dụng than sinh học sản xuất từ phụ phẩm nông nghiệp để hấp phụ xanh methylene (MB) trong môi trường chất lỏng. Biochar tạo thành từ sinh khối phụ phẩm nông nghiệp có diện tích bề mặt riêng lớn, hàm lượng thành phần nguyên tố carbon (C), hydrogen (H), oxygen (O) và nitrogen (N) chiếm tỷ lệ cao. Đối với việc ứng dụng than sinh học vào xử lý môi trường cho thấy khả năng hấp phụ màu và bước đầu đã đạt những kết quả khả quan. Mẫu than sinh học từ phụ phẩm rơm rạ nhiệt phân ở nhiệt độ 400℃ được lựa chọn để khảo sát khả năng hấp phụ xanh methylene. Kết quả cho thấy dung lượng hấp phụ gia tăng và đạt cực đại ở nồng độ xanh methylene 200 mg/L. Than sinh học với kích thước mịn (biochar 212 µm) thể hiện hiệu quả hấp phụ xanh methylene tốt nhất ở ngưỡng hấp phụ bão hòa 6,3 mg/g. Khả năng hấp phụ xanh methylene có thể đạt hiệu quả > 75%. Nguyên nhân có thể lý giải bởi bởi ưu thế diện tích bề mặt riêng lớn, sự đa dạng hệ thống kích thước lỗ xốp bên trong cấu trúc than sinh học và bề mặt của chúng có thể cung cấp nhóm chức quan trọng như -OH, C=O. Như vậy, nghiên cứu ứng dụng than sinh học tạo thành từ sinh khối phụ phẩm nông nghiệp trong xử lý nước ô nhiễm chỉ ra tiềm năng trong tương lai.

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Assessment of Nutrients Removal by Constructed Wetlands Using Reed Grass (Phragmites australis L.) and Vetiver Grass (Vetiveria Zizanioides L.)

Cited by 11 publications

References 0 publications

Importance of Dense Aquatic Vegetation in Seasonal Phosphate and Particle Transport in an Agricultural Headwater Stream

Importance of Dense Aquatic Vegetation in Seasonal Phosphate and Particle Transport in an Agricultural Headwater Stream

Evaluation of Phytoremediation Potential of Vetiver Grass (Chrysopogon zizanioides (L.) Roberty) for Wastewater Treatment

Khảo sát khả năng hấp phụ xử lý nước của than sinh học tạo thành từ sinh khối phụ phẩm nông nghiệp

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