Position of the Australian horticultural industry with respect to the use of reclaimed water

Hamilton, Andrew J.; Boland, Anne-Maree; Stevens, Daryl; Kelly, J.; Radcliffe, John; Ziehrl, Angelika; Dillon, Peter J.; Paulin, Bob

doi:10.1016/j.agwat.2004.11.001

Cited by 76 publications

(65 citation statements)

References 35 publications

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“…This confirms the Pb levels of vegetables analyzed previously in Addis Ababa's urban vegetable farming sites (Weldegebriel et al 2012) and with results reported from other African cities (Muchuweti et al 2006;Odai et al 2008;Lente et al 2012). According to Hamilton et al (2005), plant roots can adsorb Pb but may not translocate it to shoots, a possibility is that like in Ghana, high Pb levels on wastewater as well as control sites (groundwater irrigated urban farms) are attributable more to vehicular exhaust fumes (Affum et al 2008) than to irrigation water. In fact, high soil pH, clay and organic matter content are not supporting Pb uptake via roots.…”

Section: Heavy Metals In Vegetablesmentioning

confidence: 99%

Heavy metal accumulation and health risk assessment in wastewater-irrigated urban vegetable farming sites of Addis Ababa, Ethiopia

et al. 2017

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Background: Wastewater irrigation for vegetable production is a highly prevalent practice in Addis Ababa and a number of articles have been published on wastewater-irrigated soils and vegetables contaminated with heavy metals. However, to the best of our knowledge, an insight into assessment of human health risks associated with the consumption of vegetable crops grown on wastewater-irrigated soils is non-existent in the city. Long-term effect of wastewater irrigation on the build-up of heavy metals in soils and selected vegetable crops in Addis Ababa urban vegetable farming sites (10) was evaluated. By calculating estimated daily intakes (EDIs) and target hazard quotients (THQs) of metals, health risk associated with the consumption of the analyzed vegetables was also evaluated. Results: The heavy metal concentrations in irrigation water and soils did not exceed the recommended maximum limits (RMLs). Moreover, Cd, Co, Cr, Cu, Ni and Zn concentrations in all analyzed vegetables were lower than the RML standards. In contrast, Pb concentrations were 1.4-3.9 times higher. Results of two way ANOVA test showed that variation in metals concentrations were significant (p < 0.001) across farming site, vegetable type and site x vegetable interaction. The EDI and THQ values showed that there would be no potential health risk to local inhabitants due to intake of individual metal if one or more of the analyzed vegetables are consumed. Furthermore, total target hazard quotients (TTHQs) for the combined metals due to all analyzed vegetables were lower than 1, suggesting no potential health risk even to highly exposed local inhabitants. Conclusions: There is a great respite that toxic metals like Pb and Cd have not posed potential health risk even after long term (more than 50 years) use of this water for irrigation. However, intermittent monitoring of the metals from irrigation water, in soil and crops may be required to follow/prevent their build-up in the food chain.

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Section: Heavy Metals In Vegetablesmentioning

confidence: 99%

Heavy metal accumulation and health risk assessment in wastewater-irrigated urban vegetable farming sites of Addis Ababa, Ethiopia

et al. 2017

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“…Deve-se considerar ainda, questões relacionadas a alterações físico-químicas dos solos, uma vez que salinidade, toxidade a íons específicos e aporte inadequado de nutrientes podem limitar a fertilidade dos solos agrícolas (Hussaine e Al-Saati, 1999;Hamilton et al, 2005).…”

Section: Fertirrigaçãounclassified

A tecnologia de remoção de fósforo: gerenciamento do elemento em resíduos industriais

Maroneze¹,

Zepka

Vieira

et al. 2014

Rev. ambiente água

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RESUMOAs elevadas concentrações de fósforo em águas residuárias industriais é uma das principais causas da eutrofização de corpos hídricos receptores, havendo em virtude disto, uma crescente preocupação com o gerenciamento das cargas de fósforo dos efluentes industriais. Além dos aspectos de contenção ambiental, é estrategicamente desejável que os processos de tratamento permitam a recuperação e o reúso deste elemento que é considerado de elevada demanda biológica. Neste sentido, esta revisão objetiva descrever e analisar criticamente o estado atual das tecnologias de gerenciamento de fósforo em águas residuais industriais, com ênfase no reúso do elemento. As tecnologias consideradas incluem abordagens químicas (precipitação química e adsorção), biológicas (sistemas bacterianos, uso macroalgas e microalgas) além de técnicas de fertirrigação.Palavras-chave: espécies fosforadas, eutrofização, tecnologias de tratamento, reuso. Phosphorus removal technology: Management of the element in industrial waste ABSTRACTHigh phosphorus concentrations in industrial wastewaters is one of the main causes of the eutrophication of water bodies, leading to a growing concern with the management of phosphorus loads from industrial wastewaters. In addition to the environmental aspects of containment, it is strategically desirable that the treatment processes enable the recovery and reuse of this element, which is considered to be of high biological demand. For these reasons, this review describes and critically analyzes the current state of phosphorus management technologies for industrial wastewaters, with emphasis on the reuse of the element. The

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“…For instance, water of Class A in Victoria, is equivalent to Class A+ of Queensland [24]. Such difference in water quality issues among the states of Australia has been reported in recent years [25,26]. Seasonal variations of water quality parameters at the Bolivar WWTP are shown in Figure 2.…”

Section: Water Qualitymentioning

confidence: 99%

Subsurface drip irrigation with reclaimed water: issues we must think now

Oliver¹,

Hewa²,

Pezzaniti³

2012

WIT Transactions on Ecology and the Environment

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Subsurface drip irrigation (SDI) is regarded as the most efficient and safe technology in reclaimed water irrigation schemes as it minimizes potential human exposure to low quality water. However, the system performance is often limited due to emitter clogging by complex biophysical activities as the whole assembly is laid underground. Growing evidence suggest that soil temperature is strongly correlated with emitter clogging although the dynamics of how it affects emitter performance is yet to be understood. This study analyses the thermal variation in rhizosphere including the consequent changes in recycled water quality and their implications on bio-fouling of emitters. In the northern horticultural district of Adelaide, seasonal variation of 18°C at 20 cm below the ground is very common and the recorded variation in any 10 year period is notably high (25.8°C). Furthermore, the average diurnal variation is also important for operational purpose as the minimum and maximum soil temperature in any day would always occur in specific times. This variation in subsurface temperature affects reclaimed water quality primarily by regulating microbial growth in the labyrinth flow path of emitters. The ever changing level of microbial quality of recycled water still poses threat to sustainable practice of drip technology. The study concludes that future research, design and operation of reclaimed water irrigation schemes must account for these sustainability issues.

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Position of the Australian horticultural industry with respect to the use of reclaimed water

Cited by 76 publications

References 35 publications

Heavy metal accumulation and health risk assessment in wastewater-irrigated urban vegetable farming sites of Addis Ababa, Ethiopia

Heavy metal accumulation and health risk assessment in wastewater-irrigated urban vegetable farming sites of Addis Ababa, Ethiopia

A tecnologia de remoção de fósforo: gerenciamento do elemento em resíduos industriais

Subsurface drip irrigation with reclaimed water: issues we must think now

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