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T. Ahmad, K. Ahmad, and M. Alam, Sustainable management of water treatment sludge through 3'R' concept, J. Clean. Prod, vol.124, pp.1-13, 2016.

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Y. Q. Zhao, M. Razali, A. O. Babatunde, Y. Yang, and M. Bruen, Reuse of aluminium-based water treatment sludge to immobilize a wide range of phosphorus contamination: equilibrium study with different isotherm models, Sep. Sci. Technol, vol.42, issue.12, pp.2705-2721, 2007.

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M. Razali, Y. Q. Zhao, and M. Bruen, Effectiveness of a drinking water treatment sludge in removing different phosphorus species from aqueous solution, Sep. Purif. Technol, vol.55, pp.300-306, 2007.

A. Sales, F. R. De-souza, and F. R. Almeida, Mechanical properties of concrete produced with a composite of water treatment sludge and sawdust, Constr. Build. Mater, vol.25, issue.6, pp.2793-2798, 2011.

R. B. Sotero-santos, O. Rocha, and J. Povinelli, Evaluation of WTS toxicity using the Daphnia bioassay, Water Res, vol.39, issue.16, pp.3909-3917, 2005.

J. L. Zou, G. R. Xu, and G. B. Li, Ceramsite obtained from water and wastewater sludge and its characteristics affected by Fe 2 O 3 , CaO, and MgO, J. Hazard. Mater, vol.165, pp.995-1001, 2009.

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Y. Yang, D. Tomlinson, S. Kennedy, and Y. Q. Zhao, Dewatered alum sludge: a potential adsorbent for phosphorus removal, Water Sci. Technol, vol.54, pp.207-213, 2006.

R. Liu, Y. Q. Zhao, C. Sibille, and B. Ren, Evaluation of natural organic matter release from alum sludge reuse in wastewater treatment and its role in P adsorption, Chem. Eng. J, vol.302, pp.120-127, 2016.

Y. Wang, B. M. Ren, Y. Q. Zhao, A. English, and M. Cannon, A comparison of alum sludge with peat for aqueous glyphosate removal for maximizing their value for practical use, Water Sci. Technol, 2018.
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Y. Yang, Y. Q. Zhao, A. O. Babatunde, L. Wang, Y. X. Ren et al., Characteristics and mechanisms of phosphate adsorption on dewatered alum sludge, Sep. Purif. Technol, vol.51, pp.193-200, 2006.

X. H. Zhao, H. L. Luo, T. Tao, and Y. Q. Zhao, Immobilization of arsenic in aqueous solution by waterworks alum sludge: prospects in China, Int. J. Environ. Stud, vol.72, issue.6, pp.989-1001, 2015.

S. Shanmugam, Granulation techniques and technologies: recent progresses, Bioimpacts, vol.5, pp.55-63, 2015.

X. Q. Li, J. Cui, and Y. S. Pei, Granulation of drinking water treatment residuals as applicable media for phosphorus removal, J. Environ. Manag, vol.213, pp.36-46, 2018.

S. Chen, Y. Chen, H. Pei, and Q. Hou, Biofilm development dynamics and pollutant removal performance of ceramsite made from drinking-water treatment sludge, Water Environ. Res, vol.91, pp.616-627, 2019.

Y. Wang, J. Yang, H. Xu, C. Liu, Z. Shen et al., Preparation of ceramsite based on waterworks sludge and its application as matrix in constructed wetlands, Int. J. Environ. Res. Public Health, vol.16, p.2637, 2019.

G. Xu, J. Zou, and G. Li, Ceramsite made with water and wastewater sludge and its characteristics affected by SiO 2 and Al 2 O 3, Environ. Sci. Technol, vol.42, pp.7417-7423, 2008.

C. Shen, Y. Q. Zhao, and R. Liu, Development of pellet-type adsorbent based on water treatment residual, Desalin. Water Treat, vol.112, pp.3-11, 2018.

C. Shen, Y. Q. Zhao, R. Liu, Y. Mao, and D. Morgan, Adsorption of phosphorus with calcium alginate beads containing drinking water treatment residual, Water Sci. Technol, vol.78, 1980.

X. Li, D. Yu, L. Su, and Y. Pei, Facile method to granulate drinking water treatment residues as a potential media for phosphate removal, Colloids Surf. A Physicochem. Eng. Asp, vol.586, p.124198, 2020.

J. Gao, H. Guo, J. Zhang, R. Yang, J. Gao et al., Preparation of sustainable non-combustion filler substrate from waterworks sludge/aluminum slag/gypsum/silica/maifan stone for phosphorus immobilization in constructed wetlands, Water Sci. Technol, vol.80, pp.153-163, 2019.

Y. Q. Zhao, X. H. Zhao, and A. O. Babatunde, Use of dewatered alum sludge as main substrate in treatment reed bed receiving agricultural wastewater: long-term trial, Bioresour. Technol, vol.100, pp.644-648, 2009.

Y. Q. Zhao, A. O. Babatunde, Y. Hu, J. L. Kumar, and X. H. Zhao, A two-prong approach of beneficial reuse of alum sludge in engineered wetland: first experience from Ireland, Waste Biomass Valorization, vol.1, pp.227-234, 2010.

Y. Hu, Y. Zhao, X. Zhao, and J. L. Kumar, High rate nitrogen removal in an alum sludge-based intermittent aeration constructed wetland, Environ. Sci. Technol, vol.46, pp.4583-4590, 2012.

Y. Hu, Y. Zhao, and A. Rymszewicz, Robust biological nitrogen removal by creating multiple tides in a single bed tidal flow constructed wetland, Sci. Total Environ, vol.470, pp.1197-1204, 2014.

F. Masi, A. Rizzo, R. Bresciani, N. Martinuzzi, S. D. Wallace et al., Lessons learnt from a pilot study on residual dye removal by an aerated treatment wetland, Sci. Total. Environ, vol.648, pp.144-152, 2019.

X. C. Nguyen, S. W. Chang, T. C. Tran, T. T. Nguyen, T. Q. Hoang et al., Comparative study about the performance of three types of modified natural treatment systems for rice noodle wastewater, Bioresour. Technol, vol.282, pp.163-170, 2019.

Y. Q. Zhao, A. O. Babatunde, Y. S. Hu, J. L. Kumar, and X. H. Zhao, Pilot field-scale demonstration of a novel alum sludge-based constructed wetland system for enhanced wastewater treatment, Process Biochem, vol.46, issue.1, pp.278-283, 2011.

Y. Q. Zhao, A. O. Babatunde, M. Razali, and F. Harty, Use of dewatered alum sludge as a substrate in reed bed treatment systems for wastewater treatment, J. Environ. Sci. Health Part A Toxic/ Hazard. Subst. Environ. Eng, vol.43, issue.1, pp.105-110, 2008.

A. O. Babatunde, Y. Q. Zhao, A. M. Burke, M. A. Morris, and J. P. Hanrahan, Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands, Environ. Pollut, vol.157, issue.10, pp.2830-2836, 2009.

R. Liu, Y. Q. Zhao, J. Zhao, L. Xu, and C. Sibille, A fancy ecocompatible wastewater treatment system: green bio-sorption reactor, Biores. Technol, vol.234, pp.224-232, 2017.

R. Liu, Y. Q. Zhao, T. Wang, and C. Shen, Long-term operation with an insight into a newly established green biosorption reactor: can it achieve "1+1>2"?, Biores. Technol, vol.255, pp.96-103, 2018.

C. Shen, Y. Q. Zhao, R. Liu, D. Morgan, and T. Wei, Enhancing wastewater remediation by drinking water treatment residualaugmented floating treatment wetlands, Sci. Total Environ, vol.673, pp.230-236, 2019.

Y. Q. Zhao, S. Collum, M. Phelan, T. Goodbody, L. Doherty et al., Preliminary investigation of constructed wetland incorporating microbial fuel cell: batch and continuous flow trials, Chem. Eng. J, vol.229, pp.364-370, 2013.

L. Doherty, Y. Zhao, X. Zhao, and W. Wang, Nutrient and organics removal from swine slurry with simultaneous electricity generation in an alum sludge-based constructed wetland incorporating microbial fuel cell technology, Chem. Eng. J, vol.266, pp.74-81, 2015.

L. Xu, Y. Q. Zhao, X. Wang, and Z. Yu, Applying multiple biocathodes in constructed wetland-microbial fuel cell for promoting energy production and bioelectrical derived nitrification-denitrification process, Chem. Eng. J, vol.344, pp.105-113, 2018.

C. Tang, Y. Q. Zhao, C. Kang, Y. Yang, D. Morgan et al., Towards concurrent pollutants removal and high energy harvesting in a pilot-scale CW-MFC: insight into the cathode conditions and electrodes connection, Chem. Eng. J, vol.373, pp.150-160, 2019.

Y. Yang, Y. Q. Zhao, C. Tang, L. Xu, D. Morgan et al., Role of macrophyte species in constructed wetland-microbial fuel cell for simultaneous wastewater treatment and bioenergy generation, Chem. Eng. J, vol.392, p.123708, 2020.

M. Rebosura, S. Salehin, I. Pikaar, J. Kulandaivelu, G. Jiang et al., Effects of in-sewer dosing of iron-rich drinking water sludge on wastewater collection and treatment systems, Water Res, vol.171, p.115396, 2020.

Y. Q. Zhao, Enhancement of alum sludge dewatering capacity by using gypsum as skeleton builder, Colloids Surf. A Physicochem. Eng. Asp, vol.211, issue.2-3, pp.205-212, 2002.

S. Jangkorn, S. Kuhakaew, S. Theantanoo, H. Klinla-or, and T. Sriwiriyarat, Evaluation of reusing alum sludge for the coagulation of industrial wastewater containing mixed anionic surfactants, J. Environ. Sci. (China), vol.23, issue.4, pp.587-594, 2011.

A. T. Nair and M. M. Ahammed, Water treatment sludge for phosphate removal from the effluent of UASB reactor treating municipal wastewater, Process Saf. Environ. Prot, vol.94, pp.105-112, 2015.

Y. Xu, T. Chen, R. Xu, L. He, and F. Cui, Impact of recycling alum sludge on coagulation of low-turbidity source waters, Desalin. Water Treat, vol.57, issue.15, pp.6732-6739, 2015.

Y. S. Hu, Y. Q. Zhao, and B. Sorohan, Removal of glyphosate from aqueous environment by adsorption using water industrial residual, Desalination, vol.271, issue.1-3, pp.150-156, 2011.

L. Mazari, D. Abdessemed, A. Szymczyk, and M. Trari, Assessment of coagulation-ultrafiltration performance for the treatment of primary wastewater using alum sludge, Water Environ. J, vol.32, issue.4, pp.621-629, 2018.
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S. Shrestha, J. Kulandaivelu, K. Sharma, G. Jiang, and Z. Yuan, Effects of dosing iron-and alum-containing waterworks sludge on sulfide and phosphate removal in a pilot sewer, Chem. Eng. J, vol.387, p.124073, 2020.

C. Kang, Reuse of aluminum-based water treatment sludge as coagulant for animal farm wastewater treatment, MEngSc thesis, 2017.

J. Y. Lai and J. C. Liu, Co-conditioning and dewatering of alum sludge and waste activated sludge, Water Sci. Technol, vol.50, issue.9, pp.41-48, 2004.

Y. Yang, Y. Q. Zhao, A. O. Babatunde, and P. Kearney, Co-conditioning of the anaerobic digested sludge of a municipal wastewater treatment plant with alum sludge: benefit of phosphorus reduction in reject water, Water Environ. Res, vol.79, issue.13, pp.2468-2476, 2007.

B. Ren, N. Lyczko, Y. Zhao, and A. Nzihou, Integrating alum sludge with waste-activated sludge in co-conditioning and dewatering: a case study of a city in south France, Environ. Sci. Pollut. Res, vol.27, pp.14863-14871, 2020.
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M. Taylor and H. A. Elliott, Influence of water treatment residuals on dewaterability of wastewater biosolids, vol.67, pp.180-186, 2012.

H. Bamdad, K. Hawboldt, and S. Macquarrie, A review on common adsorbents for acid gases removal: focus on biochar, Renew. Sustain. Energy Rev, vol.81, pp.1705-1720, 2018.

H. Wu, Y. Zhu, S. Bian, J. H. Ko, S. F. Li et al., H2S adsorption by municipal solid waste incineration (MSWI) fly ash with heavy metals immobilization, Chemosphere, vol.195, pp.40-47, 2018.

B. Ren, N. Lyczko, Y. Q. Zhao, and A. Nzihou, Alum sludge as an efficient sorbent for hydrogen sulfide removal: experimental, mechanisms and modeling studies, Chemosphere, vol.248, p.126010, 2020.
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B. Ren, Y. Q. Zhao, N. Lyczko, and A. Nzihou, Current status and outlook of odor removal technologies in wastewater treatment plant, Waste Biomass Valorization, vol.10, issue.6, pp.1443-1458, 2019.
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A. Singh, V. Pandey, R. Bagai, M. Kumar, J. Christopher et al., ZnO-decorated MWCNTs as solvent free nanoscrubber for efficient H 2 S removal, Mater. Lett, vol.234, pp.172-174, 2019.

E. Sánchez-gonzález, P. G. Mileo, M. Sagastuy-breña, J. R. Álvarez, J. E. Reynolds et al., Highly reversible sorption of H 2 S and CO 2 by an environmentally friendly Mg-based MOF, J. Mater. Chem. A, vol.6, issue.35, pp.16900-16909, 2018.

M. Hervy, D. Pham-minh, C. Gérente, E. Weiss-hortala, A. Nzihou et al., H 2 S removal from syngas using wastes pyrolysis chars, Chem. Eng. J, vol.334, pp.2179-2189, 2018.
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S. Sharma and A. S. Verma, A theoretical study of H 2 S adsorption on graphene doped with B, Al and Ga, Phys. B, vol.427, pp.12-16, 2013.

R. Sitthikhankaew, D. Chadwick, S. Assabumrungrat, and N. Laosiripojana, Effects of humidity, O 2 , and CO 2 on H 2 S adsorption onto upgraded and KOH impregnated activated carbons, Fuel Process. Technol, vol.124, pp.249-257, 2014.

J. Wang, L. Wang, H. Fan, H. Wang, Y. Hu et al., Highly porous copper oxide sorbent for H 2 S capture at ambient temperature, Fuel, vol.209, pp.329-338, 2017.

Y. Q. Zhao, R. Liu, W. Awe, Y. Yang, and C. Shen, Acceptability of land application of alum-based water treatment residuals-an explicit and comprehensive review, Chem. Eng. J, vol.353, pp.717-726, 2018.

T. Turner, R. Wheeler, A. Stone, and I. Oliver, Potential alternative reuse pathways for water treatment residuals: remaining barriers and questions-a review, Water Air Soil Pollut, vol.230, p.227, 2019.

Y. Q. Zhao, B. Ren, A. O'brien, and S. O'toole, Using alum sludge for clay brick: an Irish investigation, Int. J. Environ. Stud, vol.73, issue.5, pp.719-730, 2016.