Heavy metals in soil and plants after long-term sewage irrigation at Tianjin China: A case study assessment

2016 ◽  
Vol 171 ◽  
pp. 153-161 ◽  
Author(s):  
Weiqing Meng ◽  
Zuwei Wang ◽  
Beibei Hu ◽  
Zhongliang Wang ◽  
Hongyuan Li ◽  
...  
Author(s):  
Safwan Mohammed ◽  
Karam Alsafadi ◽  
Sami Hennawi ◽  
Seyed Mohammad Nasir Mousavi ◽  
Faten Kamal-Eddin ◽  
...  

2021 ◽  
Author(s):  
Xiang Ning ◽  
Shengli Wang ◽  
Yi Wu ◽  
Mengbo Liu ◽  
Meng Yang ◽  
...  

Abstract The activity of heavy metals in farmland soil and the safety of food crops after long-term sewage irrigation are the premise of sustainable development of agriculture. The major pollutants of arsenic (As) and cadmium (Cd) in farmland-corn system affected by sewage irrigation for 40 years were studied. The results showed that although the content of total As in soil was high, the absorption and transport of total As by corn were relatively small, and As could not migrate down the soil profile. On the contrary, Cd mainly exists in the form of exchangeable and carbonate-bound which has strong fluidity. By optimizing the method of investigating the bioavailability of pollutants and systematically and comprehensively studying the migration law of pollutants in various parts of maize tissues, it is concluded that Cd still has high activity after stopping sewage irrigation, and the development process of maize roots has a significant relationship between the contact of heavy metals in the surface soil and the enrichment of heavy metals in the upper part of corn tissues (p < 0.01). Therefore, this study can increase the understanding of the migration law of pollutants in corn, and provide a basis for remediation of contaminated soil in local and other areas.


2013 ◽  
Vol 1 ◽  
pp. 41001 ◽  
Author(s):  
E. M. Abd El Lateef ◽  
J. E. Hall ◽  
S. R. Smith ◽  
B. A. Bakry ◽  
T. A. Elewa
Keyword(s):  

2020 ◽  
Vol 29 (4) ◽  
pp. 2049-2067
Author(s):  
Karmen L. Porter ◽  
Janna B. Oetting ◽  
Loretta Pecchioni

Purpose This study examined caregiver perceptions of their child's language and literacy disorder as influenced by communications with their speech-language pathologist. Method The participants were 12 caregivers of 10 school-aged children with language and literacy disorders. Employing qualitative methods, a collective case study approach was utilized in which the caregiver(s) of each child represented one case. The data came from semistructured interviews, codes emerged directly from the caregivers' responses during the interviews, and multiple coding passes using ATLAS.ti software were made until themes were evident. These themes were then further validated by conducting clinical file reviews and follow-up interviews with the caregivers. Results Caregivers' comments focused on the types of information received or not received, as well as the clarity of the information. This included information regarding their child's diagnosis, the long-term consequences of their child's disorder, and the connection between language and reading. Although caregivers were adept at describing their child's difficulties and therapy goals/objectives, their comments indicated that they struggled to understand their child's disorder in a way that was meaningful to them and their child. Conclusions The findings showed the value caregivers place on receiving clear and timely diagnostic information, as well as the complexity associated with caregivers' understanding of language and literacy disorders. The findings are discussed in terms of changes that could be made in clinical practice to better support children with language and literacy disorders and their families.


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