Rotating Sorptive Extraction (RSE) as a green approach for determining pesticides from fruit and vegetable wash-water using GC-MS

Abstract Wastewaters from the fresh produce processing industry are high in solids and organic matter requiring adequate treatment prior to disposal or recycling. Characterization of the processing wastewater, also referred to as wash-water is challenging, as the quality is a function of the produce. Analysis of water quality parameters, such as total suspended solids, total solids, total dissolved solids, chemical oxygen demand, biochemical oxygen demand, total nitrogen, total phosphorus, ammonia, and electrical conductivity from different fruit and vegetable operations were analyzed to develop the innovative power function models and ranking system to estimate wash-water quality. The developed models take the form of Y = a(x)b, where Y, a, x, and b are estimate, scale, rank, and location parameters, respectively. The location and rank range from −0.65 to −3.18 and 0.05 (worst water quality) to 1, respectively, while the scale parameters are highly variable. Average and standard deviation estimation models show a very good fit for washing only (R2 > 73%) and washing with processing (R2 > 79%). The models and ranks highlight the degree of treatment required to address protection of surface and ground water and make the water quality conform to regulatory standards, benefiting watershed managers, government agencies, consultants, farmers, producers, processors and technology providers.

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Fruit and Vegetable Screening Measure

PsycTESTS Dataset ◽

10.1037/t09671-000 ◽

2004 ◽

Author(s):

Judith J. Prochaska ◽

James F. Sallis

Keyword(s):

Fruit And Vegetable ◽

Screening Measure

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Analysing capabilities and resources used to incorporate fruit and vegetables into the family diet: findings from an Australian case study

Critical Dietetics ◽

10.32920/cd.v2i1.774 ◽

2014 ◽

Vol 2 (1) ◽

pp. 13

Author(s):

Samantha B Meyer

Keyword(s):

Low Income ◽

Vegetable Intake ◽

Vegetable Consumption ◽

Fruit And Vegetables ◽

Fruit And Vegetable ◽

Organizational Skills ◽

Australian Case ◽

Low Income Families ◽

Conducting Research

Research attributes low fruit and vegetable consumption to problems of access, availability and affordability. We conducted, for the first time, a case study with three families designed and analysed using the sustainable Livelihoods Framework. The benefit of such an approach is that we moved away from identified barriers and towards identifying the capabilities and resources low-income families use to incorporate fruit and vegetables into their diets. Mitigating cost and access, we provided families with a box of fresh fruit and vegetables free of charge for up to 10 weeks and observed and recorded how/if the contents were used. Results identify the importance of social networking, organizational skills, knowledge of health benefits, and social structures. This paper demonstrates an effective methodology for understanding the capabilities of, rather than barriers to, low-income families increasing fruit and vegetable intake. Additionally, we provide a ‘how to’ and ‘lessons from the field’ for researchers interested in conducting research of this nature.

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Brownstock washing: A review of the literature

TAPPI Journal ◽

10.32964/tj13.1.9 ◽

2014 ◽

Vol 13 (1) ◽

pp. 9-19 ◽

Cited By ~ 1

Author(s):

RICARDO B. SANTOS ◽

PETER W. HART

Keyword(s):

High Efficiency ◽

Black Liquor ◽

Material Balance ◽

Kraft Pulping ◽

Wash Water ◽

Pulp Fibers ◽

Kraft Process ◽

Cooking Process ◽

Materials Used ◽

Entrapped Air

Brownstock washing is a complex, dynamic process in which dirty wash water or weak black liquor (dissolved organic and inorganic material obtained from the pulp cooking process) is separated from pulp fibers. The use of material balance techniques is of great importance to identify potential problems and determine how well the system is operating. The kraft pulping industry was the first known to combine pulp washing with the recovery of materials used and produced in the wood cooking process. The motivation behind materials recovery is economic, and more recently, environmentally driven. The chemicals used in the kraft process are expensive as compared to those used in the sulfite process. For the kraft process to be economically viable, it is imperative that a very high percentage of the cooking chemicals be recovered. To reach such high efficiency, a variety of washing systems and monitoring parameters have been developed. Antifoam additives and processing aids have also played an important role in increasing washing effectiveness. Antifoam materials help attain washing effectiveness by preventing entrapped air from forming in the system, which allows for an easier, unimpeded flow of filtrate through the screens and washers.

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