Patents, Products & Published Work

A track record of problem-solving and innovation.

Seven U.S. patents, four commercial lake products to proactively improve water quality, and the peer-reviewed research behind them. Each card links to the related field insights; open any card for the technical detail and figures.

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Patents

Seven U.S. patents and applications (six as the lead inventor): spanning sediment-bound phosphorus management, in-situ contaminant sequestration, novel methods to remove phosphorus in water, aquatic pest control, and analytical methods for phosphorus release.

Water-column phosphorus-release analysis output for a lake Pending
US Pub. No. US20250012774A1 · 2024

Methods and systems of analysis of phosphorus release and management in a water body

Advanced biogeochemical analyses to predict when and how much phosphorus your sediments will release in order to optimize treatments.

Related insights
The Redox Switch Reading the Sediment Predicting Treatment Impact Post-Treatment Monitoring The Manganese Problem
Phosphorus-binding treatment at a flowing water outflow Granted
US Patent No. US12,134,083 B2 · 2022 · Granted Nov 5, 2024

Compositions and systems for binding nutrients from moving bodies of water

Remove phosphorus and nitrogen from dilute, moving water without restricting the flow.

Related insights
Anatomy of a Lake Plan Internal vs External Loading Sequencing Treatments Will That Wetland Work?
A treated pond holding restored clarity Pending
US Pub. No. US20250270122A1 · 2025

Aquatic dye and coagulant combination product to improve the longevity of water quality enhancements

Extending the water clarity longevity of aluminum-based coagulants by preventing the high pH that is caused by excessive plants and algae growth.

Related insights
HAB Response Planning Taste, Odor & the Algae Cyanotoxins in Drinking Water
Field sampling for an iron-coated lanthanum sediment-remediation site Pending
US App. 18/884,019 · 2024 · Non-publication request

Methods and compositions of an iron-coated lanthanum compound for remediation of contaminated sediments

A sediment phosphorus management innovation that encapsulates high phosphorus binding affinity lanthnaum within an insoluble iron coating, only releasing the lanthanum under anoxia when the highest sediment phosphate would be present.

Related insights
Phosphorus Inactivation The Real Cost of Treatment
In-lake coagulant application from a workboat Pending
US Pub. No. US20250333346A1 · 2025

Methods of production and use of rare earth enhanced coagulants

Strip particulate phosphorus and turbidity while producing denser sludge that costs less to handle.

Related insights
Reducing Coagulant Demand Source-Water Strategy
A managed pond where aquatic vegetation is treated Granted
US Pub. No. US20230339787A1 · 2023 · Granted Feb 17, 2025

Use of trivalent metals to enhance aquatic pesticide efficacy, surface water, and sediment quality while minimizing risk to aquatic biota

The strategic use of trivalent metals like lanthanum and aluminum to bind phosphorus and boost algaecides without non-target toxicity or environmental harm.

Related insights
Hidden Cost of Killing Weeds
A pond targeted for controlled-release aquatic treatment Pending
US Pub. No. US20240041046A1 · 2023

Methods and compositions of a liquid controlled-release pesticide for targeted delivery and drift reduction

An ecapsulation method to deliver aquatic pesticides to the target biomass and sediment interface instead of being washed downstream.

Related insights
Lake History from Orbit
Deployed at Scale

Commercial Products — the EutroSORB Family

Four phosphorus-targeting products, each built for a specific application surface — flowing water, the water column, the sediment bed, and the high-affinity sediment endpoint. All four are commercialized through eutrosorb.com.

EutroSORB F

Flagship · US 12,134,083 B2 (Granted)

Filter-based phosphorus removal for flowing water — in-stream, outflow, and tributary use where static treatment fails.

eutrosorb.com →

EutroSORB SI

Novel · US App. 18/884,019

Iron-coated lanthanum — the highest-affinity sediment target, for durable in-situ inactivation of legacy phosphorus.

eutrosorb.com →

EutroSORB G

10% lanthanum-modified bentonite

Lanthanum-modified bentonite — granular whole-lake or zone-targeted internal phosphorus inactivation.

eutrosorb.com →

EutroSORB WC

Water column PO4 Stripper

Water-column phosphorus remover for epilimnetic SRP; pairs with EutroSORB G for a full sediment-plus-column program.

eutrosorb.com →
Published Research

Peer-Reviewed Publications & Book Chapters

Selected publications by ENV's principals. In-progress and in-review manuscripts are noted as such.

Byran Fuhrmann

  • Fuhrmann, B., Espino, M.P., Antatico, C., Dumlao, A.F. (In Prep). Sediment phosphorus dynamics and implications for management of Laguna de Bay and nearby lakes.
  • Fuhrmann, B., Willis, B., Barkley, C., Shuler, S., Scott, J., Van Goethem, R., Lurling, M. (In Prep). The Seasonality of Lake Sediment Phosphorus Highlights Opportunities for Improved Water Resource Management: Insights from more than 500 lakes.
  • Easley, R., Fuhrmann, B., Price, K., Long, S., Swan, K. (In Review). Water Quality and Source Water Protection. In M50 Water Resources Planning, 4th Edition. American Water Works Association.
  • Fuhrmann, B., Fortier, M-O., Beutel, M., Teefy, S., Horne, A., Mobley, M. (In Prep). Economic analysis and life cycle assessment of hypolimnetic oxygenation of Upper San Leandro Reservoir, California.
  • Hohn, R.A., Abusaba, K.P., Bray, E.N., Hauswirth, S.C., Fuhrmann, B.C., Beutel, M.W., Lamborg, C.H., Mason, R.P., Flegal, A.R., Ganguli, P.M. (2025). Ongoing Mercury Contamination Downstream from the Former New Idria Mercury Mine: Southern Diablo Range of the California Coast Ranges. PLOS Water, 4(6): e0000328. View →
  • Rodal-Morales, N.D., Beutel, M., Fuhrmann, B., Defeo, S., Hansen, A., Brower, S., Pasek, J. (2024). Hydrology and Oxygen Addition Drive Nutrient, Metals, and Methylmercury Cycling in a Hypereutrophic Water Supply Reservoir. Frontiers in Water — Environmental Water Quality. View →
  • Seelos, M., Rivas Meraz, E., Beutel, M., Traina, S., Fuhrmann, B., Burmistrova, J., Vlassopoulos, D., O'Day, P. (2022). Evaluation of Manganese Oxide Amendments for Mercury Remediation in Contaminated Aquatic Sediments. ACS ES&T Water, 1(12), 1688–1697. View →
  • Fuhrmann, B., Beutel, M., Ganguli, P., Zhao, L., Brower, S., Funk, A., Pasek, J. (2021). Seasonal patterns of methylmercury production, release, and degradation in profundal sediment of a hyper-eutrophic reservoir. Lake and Reservoir Management, 37(4), 360–377. View →
  • Fuhrmann, B., Beutel, M., O'Day, P., Tran, C., Funk, A., Brower, S., Pasek, J., Seelos, M. (2021). Effects of mercury, organic carbon, and microbial inhibition on methylmercury cycling at the profundal sediment-water interface of a sulfate-rich hypereutrophic reservoir. Environmental Pollution, 268, 115853. View →
  • Beutel, M., Fuhrmann, B., Herbon, H., Chow, C., Brower, S., Pasek, J. (2020). Cycling of methylmercury and other redox-sensitive compounds in the profundal zone of a hypereutrophic water supply reservoir. Hydrobiologia, 847, 4425–4446. View →
  • Duvil, R., Beutel, M., Fuhrmann, B., Seelos, M. (2018). Effect of Oxygen, Nitrate and Aluminum Addition on Methylmercury Efflux from Mine-impacted Reservoir Sediment. Water Research, 144, 740–751. View →
  • Beutel, M., Garcia-Gallardo, T., Falcon-Rojas, A., Fuhrmann, B., Hansen, A. (2018). Use of oxygenation to repress release of redox-sensitive compounds from profundal sediment in the Valle de Bravo Reservoir, Mexico. International Journal of Environmental Pollution, 34(6), 17–20. View →

Abu Bakar Siddique

Full Google Scholar profile →

  • Siddique, A.B., Rahman, M.A., Gazi, E., Khatun, M., Khan, A.S., Al Helal, A.S. (2026). Groundwater contamination and human health risk assessment of drinking water in Kaliganj Municipality, Bangladesh. H2Open Journal, 9(2), 144–162.
  • Siddique, A.B., Al Helal, A.S., Patindol, T.A., Lumanao, D.M., Longatang, K.J.G., et al. (2025). Assessment of Heavy Metal Contamination and Ecological Risk in Urban River Sediments: A Case Study from Leyte, Philippines. Pollutants, 5(1), 7.
  • Siddique, A.B., Islam, M., Tasnim, N., Al Maruf, A., Al Helal, A.S., Howlader, M. (2025). Spatial distribution of soil organic carbon and nutrients in the southern Sundarbans of Bangladesh. Watershed Ecology and the Environment.
  • Al Helal, A.S., Siddique, A.B., Patindal, T.A., Lumanao, D.M., Longatang, K.J.G., et al. (2025). Microplastic Abundance, Characteristics and Associated Ecological Risk Assessment in the Selected Coastal Areas of Baybay City, Leyte, Philippines.
  • Shaibur, M.R., Siddique, A.B., Nahar, N., Al Helal, A.S., Al Maruf, M.A., Arpon, S.H., et al. (2025). Solid waste management in an urban community of a developing country: an overview of 5Rs strategies. World Development Sustainability, 100254.
  • Shaibur, M.R., Al Helal, A.S., Siddique, A.B., Husain, H., Khan, M.W., Sarwar, S., et al. (2025). Cow dung management, biogas production and the uses of bio-slurry for sustainable agriculture. Cleaner Waste Systems, 10, 100201.
  • Shaibur, M.R., Al Helal, A.S., Sarwar, S., Miah, M.A., Siddique, A.B., Howlader, M., et al. (2025). Removal of iron, manganese, and arsenic from groundwater by using banana and pineapple peel charcoal. Cleaner Chemical Engineering, 100202.
  • Hossain, M.S., Nahar, N., Shaibur, M.R., Bhuiyan, M.T., Siddique, A.B., Al Maruf, A., et al. (2024). Hydro-chemical characteristics and groundwater quality evaluation in south-western region of Bangladesh: A GIS-based approach and multivariate analyses. Heliyon, 10(1).
In the Field Press

Magazine, Newsletters & Podcasts

Practitioner-facing writing and interviews — magazines, newsletters, and podcasts on phosphorus, algae, taste-and-odor, and mercury.

  • 2024 — Maximizing Phosphorus Benefits in Agriculture While Safeguarding Water Systems. AgTech 360 Podcast. View →
  • 2024 — Greenhouse Game-Changer: Innovative Approach to Water Mold Control. Greenhouse Magazine. View →
  • 2023 — Proper Pond Management. Greenhouse Magazine. View →
  • 2022 — Stop the Slime. Greenhouse Management. View →
  • 2020 — Eutrophication and Algae Management. Calm Waters Newsletter. View →
  • 2018 — Seasonal and Redox-Mediated Patterns of Methylmercury Release from Profundal Sediment in Hodges Reservoir, California. Calm Waters Newsletter. View →
Speaking

Selected Conference Presentations

Recent invited and contributed talks at the North American Lake Management Society, California Lake Management Society, the World Lake Conference, and industry conferences.

2025

  • Advances in Sediment Phosphorus Geochemistry. North American Lake Management Society, Myrtle Beach, SC.
  • Lake Chemistry Data Do's and Don'ts. North American Lake Management Society, Myrtle Beach, SC.
  • Regional and International Lake Management Differences from a Nomad's Perspective. North American Lake Management Society, Myrtle Beach, SC.
  • Iron-coated Lanthanum: A new material for sediment phosphorus management. North American Lake Management Society, Myrtle Beach, SC.
  • Sediment Phosphorus Analysis for Improved Lake Management. California Lake Management Society, San Diego, CA. Slides →
  • The Management of Taste and Odor Compounds and Cyanotoxins in Lakes and Reservoirs. California Lake Management Society, San Diego, CA. Slides →
  • Avoiding Analysis Paralysis and Getting the Highest Return on Investment with Adaptive Lake Management. 20th World Lake Conference, Brisbane, Australia.

2024

  • Relationships, trends, and takeaways from sediment phosphorus fractionation of more than 500 samples from around the world. North American Lake Management Society, Lake Tahoe, CA.
  • Phosphorus cycling in wetlands, aquatic plants, and algae. North American Lake Management Society, Lake Tahoe, CA.
  • How lake and reservoir water quality impacts drinking water treatability and what lake managers can do about it. North American Lake Management Society, Lake Tahoe, CA.
  • Nutrient and cyanobacteria dynamics in an urban lake. North American Lake Management Society, Lake Tahoe, CA.
  • Proactive Control of Water Mold and Other Waterborne Pathogens. Cultivate Conference, Columbus, OH.
  • The importance of nutrients in lake and pond management. Northeast Cygnet Symposium, Fishkill, NY.
  • Phosphorus in Water-Sediment Systems in 3 Shallow Lakes in Laguna Province, Philippines. INLakes Seminar and Stakeholders Meeting, Manila, Philippines.

2023

  • Pros and Cons of Techniques to Bind Phosphorus. North American Lake Management Society, Erie, PA.
  • Advancements in Lake Sediment Analyses. North American Lake Management Society, Erie, PA.
  • Water quality: Common Problems and Solutions. Cultivate Conference, Columbus, OH.
  • Integrating phosphorus mitigation to enhance habitat and water quality. Mid-West Aquatic Plant Management Society, Grand Rapids, MI.
  • Water Quality Grower Tips. American Hort, Back 2 Basics. Online.

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